Add link to github.com/KoNekoD/pgx-colon-query-rewriter

fixes https://github.com/jackc/pgx/issues/2373

.golangci.yml

@@ -0,0 +1,21 @@
+# See for configurations: https://golangci-lint.run/usage/configuration/
+version: 2
+
+# See: https://golangci-lint.run/usage/formatters/
+formatters:
+  default: none
+  enable:
+    - gofmt # https://pkg.go.dev/cmd/gofmt
+    - gofumpt # https://github.com/mvdan/gofumpt
+
+  settings:
+    gofmt:
+      simplify: true # Simplify code: gofmt with `-s` option.
+
+    gofumpt:
+      # Module path which contains the source code being formatted.
+      # Default: ""
+      module-path: github.com/jackc/pgx/v5 # Should match with module in go.mod
+      # Choose whether to use the extra rules.
+      # Default: false
+      extra-rules: true

README.md

@@ -127,6 +127,7 @@ pgerrcode contains constants for the PostgreSQL error codes.
 ## Adapters for 3rd Party Tracers
 
 * [github.com/jackhopner/pgx-xray-tracer](https://github.com/jackhopner/pgx-xray-tracer)
+* [github.com/exaring/otelpgx](https://github.com/exaring/otelpgx)
 
 ## Adapters for 3rd Party Loggers
 
@@ -184,3 +185,7 @@ Simple Golang implementation for transactional outbox pattern for PostgreSQL usi
 ### [https://github.com/Arlandaren/pgxWrappy](https://github.com/Arlandaren/pgxWrappy)
 
 Simplifies working with the pgx library, providing convenient scanning of nested structures.
+
+## [https://github.com/KoNekoD/pgx-colon-query-rewriter](https://github.com/KoNekoD/pgx-colon-query-rewriter)
+
+Implementation of the pgx query rewriter to use ':' instead of '@' in named query parameters.

batch.go

@@ -43,6 +43,10 @@ func (qq *QueuedQuery) QueryRow(fn func(row Row) error) {
 }
 
 // Exec sets fn to be called when the response to qq is received.
+//
+// Note: for simple batch insert uses where it is not required to handle
+// each potential error individually, it's sufficient to not set any callbacks,
+// and just handle the return value of BatchResults.Close.
 func (qq *QueuedQuery) Exec(fn func(ct pgconn.CommandTag) error) {
 	qq.Fn = func(br BatchResults) error {
 		ct, err := br.Exec()
@@ -83,7 +87,7 @@ func (b *Batch) Len() int {
 
 type BatchResults interface {
 	// Exec reads the results from the next query in the batch as if the query has been sent with Conn.Exec. Prefer
-	// calling Exec on the QueuedQuery.
+	// calling Exec on the QueuedQuery, or just calling Close.
 	Exec() (pgconn.CommandTag, error)
 
 	// Query reads the results from the next query in the batch as if the query has been sent with Conn.Query. Prefer
@@ -98,6 +102,9 @@ type BatchResults interface {
 	// QueuedQuery.Query, QueuedQuery.QueryRow, or QueuedQuery.Exec will be called. If a callback function returns an
 	// error or the batch encounters an error subsequent callback functions will not be called.
 	//
+	// For simple batch inserts inside a transaction or similar queries, it's sufficient to not set any callbacks,
+	// and just handle the return value of Close.
+	//
 	// Close must be called before the underlying connection can be used again. Any error that occurred during a batch
 	// operation may have made it impossible to resyncronize the connection with the server. In this case the underlying
 	// connection will have been closed.
@@ -207,7 +214,6 @@ func (br *batchResults) Query() (Rows, error) {
 func (br *batchResults) QueryRow() Row {
 	rows, _ := br.Query()
 	return (*connRow)(rows.(*baseRows))
-
 }
 
 // Close closes the batch operation. Any error that occurred during a batch operation may have made it impossible to
@@ -220,6 +226,8 @@ func (br *batchResults) Close() error {
 			}
 			br.endTraced = true
 		}
+
+		invalidateCachesOnBatchResultsError(br.conn, br.b, br.err)
 	}()
 
 	if br.err != nil {
@@ -378,7 +386,6 @@ func (br *pipelineBatchResults) Query() (Rows, error) {
 func (br *pipelineBatchResults) QueryRow() Row {
 	rows, _ := br.Query()
 	return (*connRow)(rows.(*baseRows))
-
 }
 
 // Close closes the batch operation. Any error that occurred during a batch operation may have made it impossible to
@@ -391,6 +398,8 @@ func (br *pipelineBatchResults) Close() error {
 			}
 			br.endTraced = true
 		}
+
+		invalidateCachesOnBatchResultsError(br.conn, br.b, br.err)
 	}()
 
 	if br.err == nil && br.lastRows != nil && br.lastRows.err != nil {
@@ -441,3 +450,20 @@ func (br *pipelineBatchResults) nextQueryAndArgs() (query string, args []any, er
 	br.qqIdx++
 	return bi.SQL, bi.Arguments, nil
 }
+
+// invalidates statement and description caches on batch results error
+func invalidateCachesOnBatchResultsError(conn *Conn, b *Batch, err error) {
+	if err != nil && conn != nil && b != nil {
+		if sc := conn.statementCache; sc != nil {
+			for _, bi := range b.QueuedQueries {
+				sc.Invalidate(bi.SQL)
+			}
+		}
+
+		if sc := conn.descriptionCache; sc != nil {
+			for _, bi := range b.QueuedQueries {
+				sc.Invalidate(bi.SQL)
+			}
+		}
+	}
+}

batch_test.go

@@ -488,7 +488,6 @@ func TestConnSendBatchCloseRowsPartiallyRead(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		batch := &pgx.Batch{}
 		batch.Queue("select n from generate_series(0,5) n")
 		batch.Queue("select n from generate_series(0,5) n")
@@ -539,7 +538,6 @@ func TestConnSendBatchCloseRowsPartiallyRead(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
-
 	})
 }
 
@@ -550,7 +548,6 @@ func TestConnSendBatchQueryError(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		batch := &pgx.Batch{}
 		batch.Queue("select n from generate_series(0,5) n where 100/(5-n) > 0")
 		batch.Queue("select n from generate_series(0,5) n")
@@ -580,7 +577,6 @@ func TestConnSendBatchQueryError(t *testing.T) {
 		if pgErr, ok := err.(*pgconn.PgError); !(ok && pgErr.Code == "22012") {
 			t.Errorf("br.Close() => %v, want error code %v", err, 22012)
 		}
-
 	})
 }
 
@@ -591,7 +587,6 @@ func TestConnSendBatchQuerySyntaxError(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		batch := &pgx.Batch{}
 		batch.Queue("select 1 1")
 
@@ -607,7 +602,6 @@ func TestConnSendBatchQuerySyntaxError(t *testing.T) {
 		if err == nil {
 			t.Error("Expected error")
 		}
-
 	})
 }
 
@@ -618,7 +612,6 @@ func TestConnSendBatchQueryRowInsert(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		sql := `create temporary table ledger(
 	  id serial primary key,
 	  description varchar not null,
@@ -647,7 +640,6 @@ func TestConnSendBatchQueryRowInsert(t *testing.T) {
 		}
 
 		br.Close()
-
 	})
 }
 
@@ -658,7 +650,6 @@ func TestConnSendBatchQueryPartialReadInsert(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		sql := `create temporary table ledger(
 	  id serial primary key,
 	  description varchar not null,
@@ -687,7 +678,6 @@ func TestConnSendBatchQueryPartialReadInsert(t *testing.T) {
 		}
 
 		br.Close()
-
 	})
 }
 
@@ -698,7 +688,6 @@ func TestTxSendBatch(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		sql := `create temporary table ledger1(
 	  id serial primary key,
 	  description varchar not null
@@ -757,7 +746,6 @@ func TestTxSendBatch(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
-
 	})
 }
 
@@ -768,7 +756,6 @@ func TestTxSendBatchRollback(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		sql := `create temporary table ledger1(
 	  id serial primary key,
 	  description varchar not null
@@ -795,7 +782,6 @@ func TestTxSendBatchRollback(t *testing.T) {
 		if count != 0 {
 			t.Errorf("count => %v, want %v", count, 0)
 		}
-
 	})
 }
 
@@ -855,7 +841,6 @@ func TestConnBeginBatchDeferredError(t *testing.T) {
 	defer cancel()
 
 	pgxtest.RunWithQueryExecModes(ctx, t, defaultConnTestRunner, nil, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		pgxtest.SkipCockroachDB(t, conn, "Server does not support deferred constraint (https://github.com/cockroachdb/cockroach/issues/31632)")
 
 		mustExec(t, conn, `create temporary table t (
@@ -894,7 +879,6 @@ func TestConnBeginBatchDeferredError(t *testing.T) {
 		if err, ok := err.(*pgconn.PgError); !ok || err.Code != "23505" {
 			t.Fatalf("expected error 23505, got %v", err)
 		}
-
 	})
 }
 

bench_test.go

@@ -516,7 +516,6 @@ func multiInsert(conn *pgx.Conn, tableName string, columnNames []string, rowSrc
 	}
 
 	return rowCount, nil
-
 }
 
 func benchmarkWriteNRowsViaMultiInsert(b *testing.B, n int) {
@@ -535,7 +534,8 @@ func benchmarkWriteNRowsViaMultiInsert(b *testing.B, n int) {
 		src := newBenchmarkWriteTableCopyFromSrc(n)
 
 		_, err := multiInsert(conn, "t",
-			[]string{"varchar_1",
+			[]string{
+				"varchar_1",
 				"varchar_2",
 				"varchar_null_1",
 				"date_1",
@@ -547,7 +547,8 @@ func benchmarkWriteNRowsViaMultiInsert(b *testing.B, n int) {
 				"tstz_2",
 				"bool_1",
 				"bool_2",
-				"bool_3"},
+				"bool_3",
+			},
 			src)
 		if err != nil {
 			b.Fatal(err)
@@ -568,7 +569,8 @@ func benchmarkWriteNRowsViaCopy(b *testing.B, n int) {
 
 		_, err := conn.CopyFrom(context.Background(),
 			pgx.Identifier{"t"},
-			[]string{"varchar_1",
+			[]string{
+				"varchar_1",
 				"varchar_2",
 				"varchar_null_1",
 				"date_1",
@@ -580,7 +582,8 @@ func benchmarkWriteNRowsViaCopy(b *testing.B, n int) {
 				"tstz_2",
 				"bool_1",
 				"bool_2",
-				"bool_3"},
+				"bool_3",
+			},
 			src)
 		if err != nil {
 			b.Fatal(err)
@@ -611,6 +614,7 @@ func BenchmarkWrite5RowsViaInsert(b *testing.B) {
 func BenchmarkWrite5RowsViaMultiInsert(b *testing.B) {
 	benchmarkWriteNRowsViaMultiInsert(b, 5)
 }
+
 func BenchmarkWrite5RowsViaBatchInsert(b *testing.B) {
 	benchmarkWriteNRowsViaBatchInsert(b, 5)
 }
@@ -626,6 +630,7 @@ func BenchmarkWrite10RowsViaInsert(b *testing.B) {
 func BenchmarkWrite10RowsViaMultiInsert(b *testing.B) {
 	benchmarkWriteNRowsViaMultiInsert(b, 10)
 }
+
 func BenchmarkWrite10RowsViaBatchInsert(b *testing.B) {
 	benchmarkWriteNRowsViaBatchInsert(b, 10)
 }
@@ -641,6 +646,7 @@ func BenchmarkWrite100RowsViaInsert(b *testing.B) {
 func BenchmarkWrite100RowsViaMultiInsert(b *testing.B) {
 	benchmarkWriteNRowsViaMultiInsert(b, 100)
 }
+
 func BenchmarkWrite100RowsViaBatchInsert(b *testing.B) {
 	benchmarkWriteNRowsViaBatchInsert(b, 100)
 }
@@ -672,6 +678,7 @@ func BenchmarkWrite10000RowsViaInsert(b *testing.B) {
 func BenchmarkWrite10000RowsViaMultiInsert(b *testing.B) {
 	benchmarkWriteNRowsViaMultiInsert(b, 10000)
 }
+
 func BenchmarkWrite10000RowsViaBatchInsert(b *testing.B) {
 	benchmarkWriteNRowsViaBatchInsert(b, 10000)
 }
@@ -1043,7 +1050,6 @@ func BenchmarkSelectRowsScanDecoder(b *testing.B) {
 			}
 			for _, format := range formats {
 				b.Run(format.name, func(b *testing.B) {
-
 					br := &BenchRowDecoder{}
 					for i := 0; i < b.N; i++ {
 						rows, err := conn.Query(

conn.go

@@ -172,7 +172,7 @@ func ParseConfigWithOptions(connString string, options ParseConfigOptions) (*Con
 		delete(config.RuntimeParams, "statement_cache_capacity")
 		n, err := strconv.ParseInt(s, 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("cannot parse statement_cache_capacity: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse statement_cache_capacity", err)
 		}
 		statementCacheCapacity = int(n)
 	}
@@ -182,7 +182,7 @@ func ParseConfigWithOptions(connString string, options ParseConfigOptions) (*Con
 		delete(config.RuntimeParams, "description_cache_capacity")
 		n, err := strconv.ParseInt(s, 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("cannot parse description_cache_capacity: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse description_cache_capacity", err)
 		}
 		descriptionCacheCapacity = int(n)
 	}
@@ -202,7 +202,7 @@ func ParseConfigWithOptions(connString string, options ParseConfigOptions) (*Con
 		case "simple_protocol":
 			defaultQueryExecMode = QueryExecModeSimpleProtocol
 		default:
-			return nil, fmt.Errorf("invalid default_query_exec_mode: %s", s)
+			return nil, pgconn.NewParseConfigError(connString, "invalid default_query_exec_mode", err)
 		}
 	}
 

conn_test.go

@@ -412,7 +412,6 @@ func TestExecPerQuerySimpleProtocol(t *testing.T) {
 	if commandTag.String() != "INSERT 0 1" {
 		t.Fatalf("Unexpected results from Exec: %v", commandTag)
 	}
-
 }
 
 func TestPrepare(t *testing.T) {
@@ -1089,7 +1088,7 @@ func TestLoadRangeType(t *testing.T) {
 		conn.TypeMap().RegisterType(newRangeType)
 		conn.TypeMap().RegisterDefaultPgType(pgtype.Range[float64]{}, "examplefloatrange")
 
-		var inputRangeType = pgtype.Range[float64]{
+		inputRangeType := pgtype.Range[float64]{
 			Lower:     1.0,
 			Upper:     2.0,
 			LowerType: pgtype.Inclusive,
@@ -1129,7 +1128,7 @@ func TestLoadMultiRangeType(t *testing.T) {
 		conn.TypeMap().RegisterType(newMultiRangeType)
 		conn.TypeMap().RegisterDefaultPgType(pgtype.Multirange[pgtype.Range[float64]]{}, "examplefloatmultirange")
 
-		var inputMultiRangeType = pgtype.Multirange[pgtype.Range[float64]]{
+		inputMultiRangeType := pgtype.Multirange[pgtype.Range[float64]]{
 			{
 				Lower:     1.0,
 				Upper:     2.0,
@@ -1293,6 +1292,177 @@ func TestStmtCacheInvalidationTx(t *testing.T) {
 	ensureConnValid(t, conn)
 }
 
+func TestStmtCacheInvalidationConnWithBatch(t *testing.T) {
+	ctx := context.Background()
+
+	conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
+	defer closeConn(t, conn)
+
+	if conn.PgConn().ParameterStatus("crdb_version") != "" {
+		t.Skip("Test fails due to different CRDB behavior")
+	}
+
+	// create a table and fill it with some data
+	_, err := conn.Exec(ctx, `
+        DROP TABLE IF EXISTS drop_cols;
+        CREATE TABLE drop_cols (
+            id SERIAL PRIMARY KEY NOT NULL,
+            f1 int NOT NULL,
+            f2 int NOT NULL
+        );
+    `)
+	require.NoError(t, err)
+	_, err = conn.Exec(ctx, "INSERT INTO drop_cols (f1, f2) VALUES (1, 2)")
+	require.NoError(t, err)
+
+	getSQL := "SELECT * FROM drop_cols WHERE id = $1"
+
+	// This query will populate the statement cache. We don't care about the result.
+	rows, err := conn.Query(ctx, getSQL, 1)
+	require.NoError(t, err)
+	rows.Close()
+	require.NoError(t, rows.Err())
+
+	// Now, change the schema of the table out from under the statement, making it invalid.
+	_, err = conn.Exec(ctx, "ALTER TABLE drop_cols DROP COLUMN f1")
+	require.NoError(t, err)
+
+	// We must get an error the first time we try to re-execute a bad statement.
+	// It is up to the application to determine if it wants to try again. We punt to
+	// the application because there is no clear recovery path in the case of failed transactions
+	// or batch operations and because automatic retry is tricky and we don't want to get
+	// it wrong at such an importaint layer of the stack.
+	batch := &pgx.Batch{}
+	batch.Queue(getSQL, 1)
+	br := conn.SendBatch(ctx, batch)
+	rows, err = br.Query()
+	require.Error(t, err)
+	rows.Next()
+	nextErr := rows.Err()
+	rows.Close()
+	err = br.Close()
+	require.Error(t, err)
+	for _, err := range []error{nextErr, rows.Err()} {
+		if err == nil {
+			t.Fatal(`expected "cached plan must not change result type": no error`)
+		}
+		if !strings.Contains(err.Error(), "cached plan must not change result type") {
+			t.Fatalf(`expected "cached plan must not change result type", got: "%s"`, err.Error())
+		}
+	}
+
+	// On retry, the statement should have been flushed from the cache.
+	batch = &pgx.Batch{}
+	batch.Queue(getSQL, 1)
+	br = conn.SendBatch(ctx, batch)
+	rows, err = br.Query()
+	require.NoError(t, err)
+	rows.Next()
+	err = rows.Err()
+	require.NoError(t, err)
+	rows.Close()
+	require.NoError(t, rows.Err())
+	err = br.Close()
+	require.NoError(t, err)
+
+	ensureConnValid(t, conn)
+}
+
+func TestStmtCacheInvalidationTxWithBatch(t *testing.T) {
+	ctx := context.Background()
+
+	conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
+	defer closeConn(t, conn)
+
+	if conn.PgConn().ParameterStatus("crdb_version") != "" {
+		t.Skip("Server has non-standard prepare in errored transaction behavior (https://github.com/cockroachdb/cockroach/issues/84140)")
+	}
+
+	// create a table and fill it with some data
+	_, err := conn.Exec(ctx, `
+        DROP TABLE IF EXISTS drop_cols;
+        CREATE TABLE drop_cols (
+            id SERIAL PRIMARY KEY NOT NULL,
+            f1 int NOT NULL,
+            f2 int NOT NULL
+        );
+    `)
+	require.NoError(t, err)
+	_, err = conn.Exec(ctx, "INSERT INTO drop_cols (f1, f2) VALUES (1, 2)")
+	require.NoError(t, err)
+
+	tx, err := conn.Begin(ctx)
+	require.NoError(t, err)
+
+	getSQL := "SELECT * FROM drop_cols WHERE id = $1"
+
+	// This query will populate the statement cache. We don't care about the result.
+	rows, err := tx.Query(ctx, getSQL, 1)
+	require.NoError(t, err)
+	rows.Close()
+	require.NoError(t, rows.Err())
+
+	// Now, change the schema of the table out from under the statement, making it invalid.
+	_, err = tx.Exec(ctx, "ALTER TABLE drop_cols DROP COLUMN f1")
+	require.NoError(t, err)
+
+	// We must get an error the first time we try to re-execute a bad statement.
+	// It is up to the application to determine if it wants to try again. We punt to
+	// the application because there is no clear recovery path in the case of failed transactions
+	// or batch operations and because automatic retry is tricky and we don't want to get
+	// it wrong at such an importaint layer of the stack.
+	batch := &pgx.Batch{}
+	batch.Queue(getSQL, 1)
+	br := tx.SendBatch(ctx, batch)
+	rows, err = br.Query()
+	require.Error(t, err)
+	rows.Next()
+	nextErr := rows.Err()
+	rows.Close()
+	err = br.Close()
+	require.Error(t, err)
+	for _, err := range []error{nextErr, rows.Err()} {
+		if err == nil {
+			t.Fatal(`expected "cached plan must not change result type": no error`)
+		}
+		if !strings.Contains(err.Error(), "cached plan must not change result type") {
+			t.Fatalf(`expected "cached plan must not change result type", got: "%s"`, err.Error())
+		}
+	}
+
+	batch = &pgx.Batch{}
+	batch.Queue(getSQL, 1)
+	br = tx.SendBatch(ctx, batch)
+	rows, err = br.Query()
+	require.Error(t, err)
+	rows.Close()
+	err = rows.Err()
+	// Retries within the same transaction are errors (really anything except a rollback
+	// will be an error in this transaction).
+	require.Error(t, err)
+	rows.Close()
+	err = br.Close()
+	require.Error(t, err)
+
+	err = tx.Rollback(ctx)
+	require.NoError(t, err)
+
+	// once we've rolled back, retries will work
+	batch = &pgx.Batch{}
+	batch.Queue(getSQL, 1)
+	br = conn.SendBatch(ctx, batch)
+	rows, err = br.Query()
+	require.NoError(t, err)
+	rows.Next()
+	err = rows.Err()
+	require.NoError(t, err)
+	rows.Close()
+	err = br.Close()
+	require.NoError(t, err)
+
+	ensureConnValid(t, conn)
+}
+
 func TestInsertDurationInterval(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
 	defer cancel()

copy_from_test.go

@@ -76,7 +76,6 @@ func TestConnCopyWithAllQueryExecModes(t *testing.T) {
 }
 
 func TestConnCopyWithKnownOIDQueryExecModes(t *testing.T) {
-
 	for _, mode := range pgxtest.KnownOIDQueryExecModes {
 		t.Run(mode.String(), func(t *testing.T) {
 			ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)

internal/stmtcache/lru_cache.go

@@ -31,7 +31,6 @@ func (c *LRUCache) Get(key string) *pgconn.StatementDescription {
 	}
 
 	return nil
-
 }
 
 // Put stores sd in the cache. Put panics if sd.SQL is "". Put does nothing if sd.SQL already exists in the cache or

pgbouncer_test.go

@@ -72,5 +72,4 @@ func testPgbouncer(t *testing.T, config *pgx.ConnConfig, workers, iterations int
 	for i := 0; i < workers; i++ {
 		<-doneChan
 	}
-
 }

pgconn/auth_scram.go

@@ -263,7 +263,7 @@ func computeClientProof(saltedPassword, authMessage []byte) []byte {
 	return buf
 }
 
-func computeServerSignature(saltedPassword []byte, authMessage []byte) []byte {
+func computeServerSignature(saltedPassword, authMessage []byte) []byte {
 	serverKey := computeHMAC(saltedPassword, []byte("Server Key"))
 	serverSignature := computeHMAC(serverKey, authMessage)
 	buf := make([]byte, base64.StdEncoding.EncodedLen(len(serverSignature)))

pgconn/benchmark_test.go

@@ -78,7 +78,6 @@ func BenchmarkExec(b *testing.B) {
 						}
 					}
 					_, err = rr.Close()
-
 					if err != nil {
 						b.Fatal(err)
 					}
@@ -127,7 +126,6 @@ func BenchmarkExecPossibleToCancel(b *testing.B) {
 				}
 			}
 			_, err = rr.Close()
-
 			if err != nil {
 				b.Fatal(err)
 			}
@@ -184,7 +182,6 @@ func BenchmarkExecPrepared(b *testing.B) {
 					}
 				}
 				_, err = rr.Close()
-
 				if err != nil {
 					b.Fatal(err)
 				}
@@ -227,7 +224,6 @@ func BenchmarkExecPreparedPossibleToCancel(b *testing.B) {
 			}
 		}
 		_, err = rr.Close()
-
 		if err != nil {
 			b.Fatal(err)
 		}

pgconn/config.go

@@ -23,9 +23,11 @@ import (
 	"github.com/jackc/pgx/v5/pgproto3"
 )
 
-type AfterConnectFunc func(ctx context.Context, pgconn *PgConn) error
-type ValidateConnectFunc func(ctx context.Context, pgconn *PgConn) error
-type GetSSLPasswordFunc func(ctx context.Context) string
+type (
+	AfterConnectFunc    func(ctx context.Context, pgconn *PgConn) error
+	ValidateConnectFunc func(ctx context.Context, pgconn *PgConn) error
+	GetSSLPasswordFunc  func(ctx context.Context) string
+)
 
 // Config is the settings used to establish a connection to a PostgreSQL server. It must be created by [ParseConfig]. A
 // manually initialized Config will cause ConnectConfig to panic.
@@ -179,7 +181,7 @@ func NetworkAddress(host string, port uint16) (network, address string) {
 //
 // ParseConfig supports specifying multiple hosts in similar manner to libpq. Host and port may include comma separated
 // values that will be tried in order. This can be used as part of a high availability system. See
-// https://www.postgresql.org/docs/11/libpq-connect.html#LIBPQ-MULTIPLE-HOSTS for more information.
+// https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-MULTIPLE-HOSTS for more information.
 //
 //	# Example URL
 //	postgres://jack:secret@foo.example.com:5432,bar.example.com:5432/mydb
@@ -206,9 +208,9 @@ func NetworkAddress(host string, port uint16) (network, address string) {
 //	PGTARGETSESSIONATTRS
 //	PGTZ
 //
-// See http://www.postgresql.org/docs/11/static/libpq-envars.html for details on the meaning of environment variables.
+// See http://www.postgresql.org/docs/current/static/libpq-envars.html for details on the meaning of environment variables.
 //
-// See https://www.postgresql.org/docs/11/libpq-connect.html#LIBPQ-PARAMKEYWORDS for parameter key word names. They are
+// See https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PARAMKEYWORDS for parameter key word names. They are
 // usually but not always the environment variable name downcased and without the "PG" prefix.
 //
 // Important Security Notes:
@@ -216,7 +218,7 @@ func NetworkAddress(host string, port uint16) (network, address string) {
 // ParseConfig tries to match libpq behavior with regard to PGSSLMODE. This includes defaulting to "prefer" behavior if
 // not set.
 //
-// See http://www.postgresql.org/docs/11/static/libpq-ssl.html#LIBPQ-SSL-PROTECTION for details on what level of
+// See http://www.postgresql.org/docs/current/static/libpq-ssl.html#LIBPQ-SSL-PROTECTION for details on what level of
 // security each sslmode provides.
 //
 // The sslmode "prefer" (the default), sslmode "allow", and multiple hosts are implemented via the Fallbacks field of
@@ -713,7 +715,7 @@ func configTLS(settings map[string]string, thisHost string, parseConfigOptions P
 		// According to PostgreSQL documentation, if a root CA file exists,
 		// the behavior of sslmode=require should be the same as that of verify-ca
 		//
-		// See https://www.postgresql.org/docs/12/libpq-ssl.html
+		// See https://www.postgresql.org/docs/current/libpq-ssl.html
 		if sslrootcert != "" {
 			goto nextCase
 		}
@@ -784,8 +786,8 @@ func configTLS(settings map[string]string, thisHost string, parseConfigOptions P
 			if sslpassword != "" {
 				decryptedKey, decryptedError = x509.DecryptPEMBlock(block, []byte(sslpassword))
 			}
-			//if sslpassword not provided or has decryption error when use it
-			//try to find sslpassword with callback function
+			// if sslpassword not provided or has decryption error when use it
+			// try to find sslpassword with callback function
 			if sslpassword == "" || decryptedError != nil {
 				if parseConfigOptions.GetSSLPassword != nil {
 					sslpassword = parseConfigOptions.GetSSLPassword(context.Background())

pgconn/config_test.go

@@ -133,7 +133,6 @@ func TestParseConfig(t *testing.T) {
 			name:       "sslmode prefer",
 			connString: "postgres://jack:secret@localhost:5432/mydb?sslmode=prefer",
 			config: &pgconn.Config{
-
 				User:     "jack",
 				Password: "secret",
 				Host:     "localhost",
@@ -567,7 +566,8 @@ func TestParseConfig(t *testing.T) {
 						TLSConfig: &tls.Config{
 							InsecureSkipVerify: true,
 							ServerName:         "bar",
-						}},
+						},
+					},
 					{
 						Host:      "bar",
 						Port:      defaultPort,
@@ -579,7 +579,8 @@ func TestParseConfig(t *testing.T) {
 						TLSConfig: &tls.Config{
 							InsecureSkipVerify: true,
 							ServerName:         "baz",
-						}},
+						},
+					},
 					{
 						Host:      "baz",
 						Port:      defaultPort,
@@ -1023,7 +1024,7 @@ func TestParseConfigReadsPgPassfile(t *testing.T) {
 	t.Parallel()
 
 	tfName := filepath.Join(t.TempDir(), "config")
-	err := os.WriteFile(tfName, []byte("test1:5432:curlydb:curly:nyuknyuknyuk"), 0600)
+	err := os.WriteFile(tfName, []byte("test1:5432:curlydb:curly:nyuknyuknyuk"), 0o600)
 	require.NoError(t, err)
 
 	connString := fmt.Sprintf("postgres://curly@test1:5432/curlydb?sslmode=disable&passfile=%s", tfName)
@@ -1061,7 +1062,7 @@ host = def.example.com
 dbname = defdb
 user = defuser
 application_name = spaced string
-`), 0600)
+`), 0o600)
 	require.NoError(t, err)
 
 	defaultPort := getDefaultPort(t)

pgconn/errors.go

@@ -27,7 +27,7 @@ func Timeout(err error) bool {
 }
 
 // PgError represents an error reported by the PostgreSQL server. See
-// http://www.postgresql.org/docs/11/static/protocol-error-fields.html for
+// http://www.postgresql.org/docs/current/static/protocol-error-fields.html for
 // detailed field description.
 type PgError struct {
 	Severity            string
@@ -112,6 +112,14 @@ type ParseConfigError struct {
 	err        error
 }
 
+func NewParseConfigError(conn, msg string, err error) error {
+	return &ParseConfigError{
+		ConnString: conn,
+		msg:        msg,
+		err:        err,
+	}
+}
+
 func (e *ParseConfigError) Error() string {
 	// Now that ParseConfigError is public and ConnString is available to the developer, perhaps it would be better only
 	// return a static string. That would ensure that the error message cannot leak a password. The ConnString field would

pgconn/export_test.go

@@ -1,11 +1,3 @@
 // File export_test exports some methods for better testing.
 
 package pgconn
-
-func NewParseConfigError(conn, msg string, err error) error {
-	return &ParseConfigError{
-		ConnString: conn,
-		msg:        msg,
-		err:        err,
-	}
-}

pgconn/krb5.go

@@ -28,7 +28,7 @@ func RegisterGSSProvider(newGSSArg NewGSSFunc) {
 
 // GSS provides GSSAPI authentication (e.g., Kerberos).
 type GSS interface {
-	GetInitToken(host string, service string) ([]byte, error)
+	GetInitToken(host, service string) ([]byte, error)
 	GetInitTokenFromSPN(spn string) ([]byte, error)
 	Continue(inToken []byte) (done bool, outToken []byte, err error)
 }

pgconn/pgconn.go

@@ -135,7 +135,7 @@ func ConnectWithOptions(ctx context.Context, connString string, parseConfigOptio
 //
 // If config.Fallbacks are present they will sequentially be tried in case of error establishing network connection. An
 // authentication error will terminate the chain of attempts (like libpq:
-// https://www.postgresql.org/docs/11/libpq-connect.html#LIBPQ-MULTIPLE-HOSTS) and be returned as the error.
+// https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-MULTIPLE-HOSTS) and be returned as the error.
 func ConnectConfig(ctx context.Context, config *Config) (*PgConn, error) {
 	// Default values are set in ParseConfig. Enforce initial creation by ParseConfig rather than setting defaults from
 	// zero values.
@@ -991,7 +991,8 @@ func noticeResponseToNotice(msg *pgproto3.NoticeResponse) *Notice {
 
 // CancelRequest sends a cancel request to the PostgreSQL server. It returns an error if unable to deliver the cancel
 // request, but lack of an error does not ensure that the query was canceled. As specified in the documentation, there
-// is no way to be sure a query was canceled. See https://www.postgresql.org/docs/11/protocol-flow.html#id-1.10.5.7.9
+// is no way to be sure a query was canceled.
+// See https://www.postgresql.org/docs/current/protocol-flow.html#PROTOCOL-FLOW-CANCELING-REQUESTS
 func (pgConn *PgConn) CancelRequest(ctx context.Context) error {
 	// Open a cancellation request to the same server. The address is taken from the net.Conn directly instead of reusing
 	// the connection config. This is important in high availability configurations where fallback connections may be
@@ -1140,7 +1141,7 @@ func (pgConn *PgConn) Exec(ctx context.Context, sql string) *MultiResultReader {
 // binary format. If resultFormats is nil all results will be in text format.
 //
 // ResultReader must be closed before PgConn can be used again.
-func (pgConn *PgConn) ExecParams(ctx context.Context, sql string, paramValues [][]byte, paramOIDs []uint32, paramFormats []int16, resultFormats []int16) *ResultReader {
+func (pgConn *PgConn) ExecParams(ctx context.Context, sql string, paramValues [][]byte, paramOIDs []uint32, paramFormats, resultFormats []int16) *ResultReader {
 	result := pgConn.execExtendedPrefix(ctx, paramValues)
 	if result.closed {
 		return result
@@ -1166,7 +1167,7 @@ func (pgConn *PgConn) ExecParams(ctx context.Context, sql string, paramValues []
 // binary format. If resultFormats is nil all results will be in text format.
 //
 // ResultReader must be closed before PgConn can be used again.
-func (pgConn *PgConn) ExecPrepared(ctx context.Context, stmtName string, paramValues [][]byte, paramFormats []int16, resultFormats []int16) *ResultReader {
+func (pgConn *PgConn) ExecPrepared(ctx context.Context, stmtName string, paramValues [][]byte, paramFormats, resultFormats []int16) *ResultReader {
 	result := pgConn.execExtendedPrefix(ctx, paramValues)
 	if result.closed {
 		return result
@@ -1373,7 +1374,14 @@ func (pgConn *PgConn) CopyFrom(ctx context.Context, r io.Reader, sql string) (Co
 				close(pgConn.cleanupDone)
 				return CommandTag{}, normalizeTimeoutError(ctx, err)
 			}
-			msg, _ := pgConn.receiveMessage()
+			// peekMessage never returns err in the bufferingReceive mode - it only forwards the bufferingReceive variables.
+			// Therefore, the only case for receiveMessage to return err is during handling of the ErrorResponse message type
+			// and using pgOnError handler to determine the connection is no longer valid (and thus closing the conn).
+			msg, serverError := pgConn.receiveMessage()
+			if serverError != nil {
+				close(abortCopyChan)
+				return CommandTag{}, serverError
+			}
 
 			switch msg := msg.(type) {
 			case *pgproto3.ErrorResponse:
@@ -1712,7 +1720,7 @@ type Batch struct {
 }
 
 // ExecParams appends an ExecParams command to the batch. See PgConn.ExecParams for parameter descriptions.
-func (batch *Batch) ExecParams(sql string, paramValues [][]byte, paramOIDs []uint32, paramFormats []int16, resultFormats []int16) {
+func (batch *Batch) ExecParams(sql string, paramValues [][]byte, paramOIDs []uint32, paramFormats, resultFormats []int16) {
 	if batch.err != nil {
 		return
 	}
@@ -1725,7 +1733,7 @@ func (batch *Batch) ExecParams(sql string, paramValues [][]byte, paramOIDs []uin
 }
 
 // ExecPrepared appends an ExecPrepared e command to the batch. See PgConn.ExecPrepared for parameter descriptions.
-func (batch *Batch) ExecPrepared(stmtName string, paramValues [][]byte, paramFormats []int16, resultFormats []int16) {
+func (batch *Batch) ExecPrepared(stmtName string, paramValues [][]byte, paramFormats, resultFormats []int16) {
 	if batch.err != nil {
 		return
 	}
@@ -2201,7 +2209,7 @@ func (p *Pipeline) SendDeallocate(name string) {
 }
 
 // SendQueryParams is the pipeline version of *PgConn.QueryParams.
-func (p *Pipeline) SendQueryParams(sql string, paramValues [][]byte, paramOIDs []uint32, paramFormats []int16, resultFormats []int16) {
+func (p *Pipeline) SendQueryParams(sql string, paramValues [][]byte, paramOIDs []uint32, paramFormats, resultFormats []int16) {
 	if p.closed {
 		return
 	}
@@ -2214,7 +2222,7 @@ func (p *Pipeline) SendQueryParams(sql string, paramValues [][]byte, paramOIDs [
 }
 
 // SendQueryPrepared is the pipeline version of *PgConn.QueryPrepared.
-func (p *Pipeline) SendQueryPrepared(stmtName string, paramValues [][]byte, paramFormats []int16, resultFormats []int16) {
+func (p *Pipeline) SendQueryPrepared(stmtName string, paramValues [][]byte, paramFormats, resultFormats []int16) {
 	if p.closed {
 		return
 	}

pgconn/pgconn_private_test.go

@@ -9,7 +9,7 @@ import (
 func TestCommandTag(t *testing.T) {
 	t.Parallel()
 
-	var tests = []struct {
+	tests := []struct {
 		commandTag   CommandTag
 		rowsAffected int64
 		isInsert     bool

pgconn/pgconn_test.go

@@ -2130,6 +2130,63 @@ func TestConnCopyFromPrecanceled(t *testing.T) {
 	ensureConnValid(t, pgConn)
 }
 
+// https://github.com/jackc/pgx/issues/2364
+func TestConnCopyFromConnectionTerminated(t *testing.T) {
+	t.Parallel()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
+	defer cancel()
+
+	pgConn, err := pgconn.Connect(ctx, os.Getenv("PGX_TEST_DATABASE"))
+	require.NoError(t, err)
+	defer closeConn(t, pgConn)
+
+	if pgConn.ParameterStatus("crdb_version") != "" {
+		t.Skip("Server does not support pg_terminate_backend")
+	}
+
+	closerConn, err := pgconn.Connect(ctx, os.Getenv("PGX_TEST_DATABASE"))
+	require.NoError(t, err)
+	time.AfterFunc(500*time.Millisecond, func() {
+		// defer inside of AfterFunc instead of outer test function because outer function can finish while Read is still in
+		// progress which could cause closerConn to be closed too soon.
+		defer closeConn(t, closerConn)
+		err := closerConn.ExecParams(ctx, "select pg_terminate_backend($1)", [][]byte{[]byte(fmt.Sprintf("%d", pgConn.PID()))}, nil, nil, nil).Read().Err
+		require.NoError(t, err)
+	})
+
+	_, err = pgConn.Exec(ctx, `create temporary table foo(
+		a int4,
+		b varchar
+	)`).ReadAll()
+	require.NoError(t, err)
+
+	r, w := io.Pipe()
+	go func() {
+		for i := 0; i < 5_000; i++ {
+			a := strconv.Itoa(i)
+			b := "foo " + a + " bar"
+			_, err := w.Write([]byte(fmt.Sprintf("%s,\"%s\"\n", a, b)))
+			if err != nil {
+				return
+			}
+			time.Sleep(time.Millisecond)
+		}
+	}()
+
+	copySql := "COPY foo FROM STDIN WITH (FORMAT csv)"
+	ct, err := pgConn.CopyFrom(ctx, r, copySql)
+	assert.Equal(t, int64(0), ct.RowsAffected())
+	assert.Error(t, err)
+
+	assert.True(t, pgConn.IsClosed())
+	select {
+	case <-pgConn.CleanupDone():
+	case <-time.After(5 * time.Second):
+		t.Fatal("Connection cleanup exceeded maximum time")
+	}
+}
+
 func TestConnCopyFromGzipReader(t *testing.T) {
 	t.Parallel()
 

pgproto3/authentication_cleartext_password.go

@@ -9,8 +9,7 @@ import (
 )
 
 // AuthenticationCleartextPassword is a message sent from the backend indicating that a clear-text password is required.
-type AuthenticationCleartextPassword struct {
-}
+type AuthenticationCleartextPassword struct{}
 
 // Backend identifies this message as sendable by the PostgreSQL backend.
 func (*AuthenticationCleartextPassword) Backend() {}

pgproto3/authentication_ok.go

@@ -9,8 +9,7 @@ import (
 )
 
 // AuthenticationOk is a message sent from the backend indicating that authentication was successful.
-type AuthenticationOk struct {
-}
+type AuthenticationOk struct{}
 
 // Backend identifies this message as sendable by the PostgreSQL backend.
 func (*AuthenticationOk) Backend() {}

pgproto3/copy_done.go

@@ -4,8 +4,7 @@ import (
 	"encoding/json"
 )
 
-type CopyDone struct {
-}
+type CopyDone struct{}
 
 // Backend identifies this message as sendable by the PostgreSQL backend.
 func (*CopyDone) Backend() {}

pgproto3/gss_enc_request.go

@@ -10,8 +10,7 @@ import (
 
 const gssEncReqNumber = 80877104
 
-type GSSEncRequest struct {
-}
+type GSSEncRequest struct{}
 
 // Frontend identifies this message as sendable by a PostgreSQL frontend.
 func (*GSSEncRequest) Frontend() {}

pgproto3/json_test.go

@@ -332,7 +332,7 @@ func TestJSONUnmarshalRowDescription(t *testing.T) {
 }
 
 func TestJSONUnmarshalBind(t *testing.T) {
-	var testCases = []struct {
+	testCases := []struct {
 		desc string
 		data []byte
 	}{
@@ -348,7 +348,7 @@ func TestJSONUnmarshalBind(t *testing.T) {
 
 	for _, tc := range testCases {
 		t.Run(tc.desc, func(t *testing.T) {
-			var want = Bind{
+			want := Bind{
 				PreparedStatement:    "lrupsc_1_0",
 				ParameterFormatCodes: []int16{0},
 				Parameters:           [][]byte{[]byte("ABC-123")},

pgproto3/row_description.go

@@ -56,7 +56,6 @@ func (*RowDescription) Backend() {}
 // Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
 // type identifier and 4 byte message length.
 func (dst *RowDescription) Decode(src []byte) error {
-
 	if len(src) < 2 {
 		return &invalidMessageFormatErr{messageType: "RowDescription"}
 	}

pgproto3/ssl_request.go

@@ -10,8 +10,7 @@ import (
 
 const sslRequestNumber = 80877103
 
-type SSLRequest struct {
-}
+type SSLRequest struct{}
 
 // Frontend identifies this message as sendable by a PostgreSQL frontend.
 func (*SSLRequest) Frontend() {}

pgtype/array.go

@@ -374,8 +374,8 @@ func quoteArrayElementIfNeeded(src string) string {
 	return src
 }
 
-// Array represents a PostgreSQL array for T. It implements the ArrayGetter and ArraySetter interfaces. It preserves
-// PostgreSQL dimensions and custom lower bounds. Use FlatArray if these are not needed.
+// Array represents a PostgreSQL array for T. It implements the [ArrayGetter] and [ArraySetter] interfaces. It preserves
+// PostgreSQL dimensions and custom lower bounds. Use [FlatArray] if these are not needed.
 type Array[T any] struct {
 	Elements []T
 	Dims     []ArrayDimension
@@ -419,8 +419,8 @@ func (a Array[T]) ScanIndexType() any {
 	return new(T)
 }
 
-// FlatArray implements the ArrayGetter and ArraySetter interfaces for any slice of T. It ignores PostgreSQL dimensions
-// and custom lower bounds. Use Array to preserve these.
+// FlatArray implements the [ArrayGetter] and [ArraySetter] interfaces for any slice of T. It ignores PostgreSQL dimensions
+// and custom lower bounds. Use [Array] to preserve these.
 type FlatArray[T any] []T
 
 func (a FlatArray[T]) Dimensions() []ArrayDimension {

pgtype/array_codec_test.go

@@ -256,7 +256,6 @@ func TestArrayCodecScanMultipleDimensions(t *testing.T) {
 	skipCockroachDB(t, "Server does not support nested arrays (https://github.com/cockroachdb/cockroach/issues/36815)")
 
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		rows, err := conn.Query(ctx, `select '{{1,2,3,4}, {5,6,7,8}, {9,10,11,12}}'::int4[]`)
 		require.NoError(t, err)
 

pgtype/bits.go

@@ -23,16 +23,18 @@ type Bits struct {
 	Valid bool
 }
 
+// ScanBits implements the [BitsScanner] interface.
 func (b *Bits) ScanBits(v Bits) error {
 	*b = v
 	return nil
 }
 
+// BitsValue implements the [BitsValuer] interface.
 func (b Bits) BitsValue() (Bits, error) {
 	return b, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Bits) Scan(src any) error {
 	if src == nil {
 		*dst = Bits{}
@@ -47,7 +49,7 @@ func (dst *Bits) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Bits) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -127,7 +129,6 @@ func (encodePlanBitsCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (BitsCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/bool.go

@@ -22,16 +22,18 @@ type Bool struct {
 	Valid bool
 }
 
+// ScanBool implements the [BoolScanner] interface.
 func (b *Bool) ScanBool(v Bool) error {
 	*b = v
 	return nil
 }
 
+// BoolValue implements the [BoolValuer] interface.
 func (b Bool) BoolValue() (Bool, error) {
 	return b, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Bool) Scan(src any) error {
 	if src == nil {
 		*dst = Bool{}
@@ -61,7 +63,7 @@ func (dst *Bool) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Bool) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -70,6 +72,7 @@ func (src Bool) Value() (driver.Value, error) {
 	return src.Bool, nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Bool) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -82,6 +85,7 @@ func (src Bool) MarshalJSON() ([]byte, error) {
 	}
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Bool) UnmarshalJSON(b []byte) error {
 	var v *bool
 	err := json.Unmarshal(b, &v)
@@ -200,7 +204,6 @@ func (encodePlanBoolCodecTextBool) Encode(value any, buf []byte) (newBuf []byte,
 }
 
 func (BoolCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {
@@ -328,7 +331,7 @@ func (scanPlanTextAnyToBoolScanner) Scan(src []byte, dst any) error {
 	return s.ScanBool(Bool{Bool: v, Valid: true})
 }
 
-// https://www.postgresql.org/docs/11/datatype-boolean.html
+// https://www.postgresql.org/docs/current/datatype-boolean.html
 func planTextToBool(src []byte) (bool, error) {
 	s := string(bytes.ToLower(bytes.TrimSpace(src)))
 

pgtype/box.go

@@ -24,16 +24,18 @@ type Box struct {
 	Valid bool
 }
 
+// ScanBox implements the [BoxScanner] interface.
 func (b *Box) ScanBox(v Box) error {
 	*b = v
 	return nil
 }
 
+// BoxValue implements the [BoxValuer] interface.
 func (b Box) BoxValue() (Box, error) {
 	return b, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Box) Scan(src any) error {
 	if src == nil {
 		*dst = Box{}
@@ -48,7 +50,7 @@ func (dst *Box) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Box) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -127,7 +129,6 @@ func (encodePlanBoxCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (BoxCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/builtin_wrappers.go

@@ -527,6 +527,7 @@ func (w *netIPNetWrapper) ScanNetipPrefix(v netip.Prefix) error {
 
 	return nil
 }
+
 func (w netIPNetWrapper) NetipPrefixValue() (netip.Prefix, error) {
 	ip, ok := netip.AddrFromSlice(w.IP)
 	if !ok {
@@ -881,7 +882,6 @@ func (a *anyMultiDimSliceArray) SetDimensions(dimensions []ArrayDimension) error
 
 		return nil
 	}
-
 }
 
 func (a *anyMultiDimSliceArray) makeMultidimensionalSlice(sliceType reflect.Type, dimensions []ArrayDimension, flatSlice reflect.Value, flatSliceIdx int) reflect.Value {

pgtype/bytea.go

@@ -148,7 +148,6 @@ func (encodePlanBytesCodecTextBytesValuer) Encode(value any, buf []byte) (newBuf
 }
 
 func (ByteaCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/circle.go

@@ -25,16 +25,18 @@ type Circle struct {
 	Valid bool
 }
 
+// ScanCircle implements the [CircleScanner] interface.
 func (c *Circle) ScanCircle(v Circle) error {
 	*c = v
 	return nil
 }
 
+// CircleValue implements the [CircleValuer] interface.
 func (c Circle) CircleValue() (Circle, error) {
 	return c, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Circle) Scan(src any) error {
 	if src == nil {
 		*dst = Circle{}
@@ -49,7 +51,7 @@ func (dst *Circle) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Circle) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil

pgtype/composite.go

@@ -276,7 +276,6 @@ func (c *CompositeCodec) DecodeValue(m *Map, oid uint32, format int16, src []byt
 	default:
 		return nil, fmt.Errorf("unknown format code %d", format)
 	}
-
 }
 
 type CompositeBinaryScanner struct {

pgtype/composite_test.go

@@ -12,7 +12,6 @@ import (
 
 func TestCompositeCodecTranscode(t *testing.T) {
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		_, err := conn.Exec(ctx, `drop type if exists ct_test;
 
 create type ct_test as (
@@ -90,7 +89,6 @@ func (p *point3d) ScanIndex(i int) any {
 
 func TestCompositeCodecTranscodeStruct(t *testing.T) {
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		_, err := conn.Exec(ctx, `drop type if exists point3d;
 
 create type point3d as (
@@ -125,7 +123,6 @@ create type point3d as (
 
 func TestCompositeCodecTranscodeStructWrapper(t *testing.T) {
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		_, err := conn.Exec(ctx, `drop type if exists point3d;
 
 create type point3d as (
@@ -164,7 +161,6 @@ create type point3d as (
 
 func TestCompositeCodecDecodeValue(t *testing.T) {
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		_, err := conn.Exec(ctx, `drop type if exists point3d;
 
 create type point3d as (
@@ -209,7 +205,6 @@ func TestCompositeCodecTranscodeStructWrapperForTable(t *testing.T) {
 	skipCockroachDB(t, "Server does not support composite types from table definitions")
 
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		_, err := conn.Exec(ctx, `drop table if exists point3d;
 
 create table point3d (

pgtype/date.go

@@ -26,11 +26,13 @@ type Date struct {
 	Valid            bool
 }
 
+// ScanDate implements the [DateScanner] interface.
 func (d *Date) ScanDate(v Date) error {
 	*d = v
 	return nil
 }
 
+// DateValue implements the [DateValuer] interface.
 func (d Date) DateValue() (Date, error) {
 	return d, nil
 }
@@ -40,7 +42,7 @@ const (
 	infinityDayOffset         = 2147483647
 )
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Date) Scan(src any) error {
 	if src == nil {
 		*dst = Date{}
@@ -58,7 +60,7 @@ func (dst *Date) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Date) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -70,6 +72,7 @@ func (src Date) Value() (driver.Value, error) {
 	return src.Time, nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Date) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -89,6 +92,7 @@ func (src Date) MarshalJSON() ([]byte, error) {
 	return json.Marshal(s)
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Date) UnmarshalJSON(b []byte) error {
 	var s *string
 	err := json.Unmarshal(b, &s)
@@ -223,7 +227,6 @@ func (encodePlanDateCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (DateCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/enum_codec_test.go

@@ -10,7 +10,6 @@ import (
 
 func TestEnumCodec(t *testing.T) {
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		_, err := conn.Exec(ctx, `drop type if exists enum_test;
 
 create type enum_test as enum ('foo', 'bar', 'baz');`)
@@ -47,7 +46,6 @@ create type enum_test as enum ('foo', 'bar', 'baz');`)
 
 func TestEnumCodecValues(t *testing.T) {
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		_, err := conn.Exec(ctx, `drop type if exists enum_test;
 
 create type enum_test as enum ('foo', 'bar', 'baz');`)

pgtype/float4.go

@@ -16,26 +16,29 @@ type Float4 struct {
 	Valid   bool
 }
 
-// ScanFloat64 implements the Float64Scanner interface.
+// ScanFloat64 implements the [Float64Scanner] interface.
 func (f *Float4) ScanFloat64(n Float8) error {
 	*f = Float4{Float32: float32(n.Float64), Valid: n.Valid}
 	return nil
 }
 
+// Float64Value implements the [Float64Valuer] interface.
 func (f Float4) Float64Value() (Float8, error) {
 	return Float8{Float64: float64(f.Float32), Valid: f.Valid}, nil
 }
 
+// ScanInt64 implements the [Int64Scanner] interface.
 func (f *Float4) ScanInt64(n Int8) error {
 	*f = Float4{Float32: float32(n.Int64), Valid: n.Valid}
 	return nil
 }
 
+// Int64Value implements the [Int64Valuer] interface.
 func (f Float4) Int64Value() (Int8, error) {
 	return Int8{Int64: int64(f.Float32), Valid: f.Valid}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (f *Float4) Scan(src any) error {
 	if src == nil {
 		*f = Float4{}
@@ -58,7 +61,7 @@ func (f *Float4) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (f Float4) Value() (driver.Value, error) {
 	if !f.Valid {
 		return nil, nil
@@ -66,6 +69,7 @@ func (f Float4) Value() (driver.Value, error) {
 	return float64(f.Float32), nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (f Float4) MarshalJSON() ([]byte, error) {
 	if !f.Valid {
 		return []byte("null"), nil
@@ -73,6 +77,7 @@ func (f Float4) MarshalJSON() ([]byte, error) {
 	return json.Marshal(f.Float32)
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (f *Float4) UnmarshalJSON(b []byte) error {
 	var n *float32
 	err := json.Unmarshal(b, &n)
@@ -170,7 +175,6 @@ func (encodePlanFloat4CodecBinaryInt64Valuer) Encode(value any, buf []byte) (new
 }
 
 func (Float4Codec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/float8.go

@@ -24,26 +24,29 @@ type Float8 struct {
 	Valid   bool
 }
 
-// ScanFloat64 implements the Float64Scanner interface.
+// ScanFloat64 implements the [Float64Scanner] interface.
 func (f *Float8) ScanFloat64(n Float8) error {
 	*f = n
 	return nil
 }
 
+// Float64Value implements the [Float64Valuer] interface.
 func (f Float8) Float64Value() (Float8, error) {
 	return f, nil
 }
 
+// ScanInt64 implements the [Int64Scanner] interface.
 func (f *Float8) ScanInt64(n Int8) error {
 	*f = Float8{Float64: float64(n.Int64), Valid: n.Valid}
 	return nil
 }
 
+// Int64Value implements the [Int64Valuer] interface.
 func (f Float8) Int64Value() (Int8, error) {
 	return Int8{Int64: int64(f.Float64), Valid: f.Valid}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (f *Float8) Scan(src any) error {
 	if src == nil {
 		*f = Float8{}
@@ -66,7 +69,7 @@ func (f *Float8) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (f Float8) Value() (driver.Value, error) {
 	if !f.Valid {
 		return nil, nil
@@ -74,6 +77,7 @@ func (f Float8) Value() (driver.Value, error) {
 	return f.Float64, nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (f Float8) MarshalJSON() ([]byte, error) {
 	if !f.Valid {
 		return []byte("null"), nil
@@ -81,6 +85,7 @@ func (f Float8) MarshalJSON() ([]byte, error) {
 	return json.Marshal(f.Float64)
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (f *Float8) UnmarshalJSON(b []byte) error {
 	var n *float64
 	err := json.Unmarshal(b, &n)
@@ -208,7 +213,6 @@ func (encodePlanTextInt64Valuer) Encode(value any, buf []byte) (newBuf []byte, e
 }
 
 func (Float8Codec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/hstore.go

@@ -22,16 +22,18 @@ type HstoreValuer interface {
 // associated with its keys.
 type Hstore map[string]*string
 
+// ScanHstore implements the [HstoreScanner] interface.
 func (h *Hstore) ScanHstore(v Hstore) error {
 	*h = v
 	return nil
 }
 
+// HstoreValue implements the [HstoreValuer] interface.
 func (h Hstore) HstoreValue() (Hstore, error) {
 	return h, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (h *Hstore) Scan(src any) error {
 	if src == nil {
 		*h = nil
@@ -46,7 +48,7 @@ func (h *Hstore) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (h Hstore) Value() (driver.Value, error) {
 	if h == nil {
 		return nil, nil
@@ -162,7 +164,6 @@ func (encodePlanHstoreCodecText) Encode(value any, buf []byte) (newBuf []byte, e
 }
 
 func (HstoreCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {
@@ -298,7 +299,7 @@ func (p *hstoreParser) consume() (b byte, end bool) {
 	return b, false
 }
 
-func unexpectedByteErr(actualB byte, expectedB byte) error {
+func unexpectedByteErr(actualB, expectedB byte) error {
 	return fmt.Errorf("expected '%c' ('%#v'); found '%c' ('%#v')", expectedB, expectedB, actualB, actualB)
 }
 
@@ -316,7 +317,7 @@ func (p *hstoreParser) consumeExpectedByte(expectedB byte) error {
 
 // consumeExpected2 consumes two expected bytes or returns an error.
 // This was a bit faster than using a string argument (better inlining? Not sure).
-func (p *hstoreParser) consumeExpected2(one byte, two byte) error {
+func (p *hstoreParser) consumeExpected2(one, two byte) error {
 	if p.pos+2 > len(p.str) {
 		return errors.New("unexpected end of string")
 	}

pgtype/hstore_test.go

@@ -306,12 +306,13 @@ func TestRoundTrip(t *testing.T) {
 			})
 		}
 	}
-
 }
 
 func BenchmarkHstoreEncode(b *testing.B) {
-	h := pgtype.Hstore{"a x": stringPtr("100"), "b": stringPtr("200"), "c": stringPtr("300"),
-		"d": stringPtr("400"), "e": stringPtr("500")}
+	h := pgtype.Hstore{
+		"a x": stringPtr("100"), "b": stringPtr("200"), "c": stringPtr("300"),
+		"d": stringPtr("400"), "e": stringPtr("500"),
+	}
 
 	serializeConfigs := []struct {
 		name       string

pgtype/inet.go

@@ -24,7 +24,7 @@ type NetipPrefixValuer interface {
 	NetipPrefixValue() (netip.Prefix, error)
 }
 
-// InetCodec handles both inet and cidr PostgreSQL types. The preferred Go types are netip.Prefix and netip.Addr. If
+// InetCodec handles both inet and cidr PostgreSQL types. The preferred Go types are [netip.Prefix] and [netip.Addr]. If
 // IsValid() is false then they are treated as SQL NULL.
 type InetCodec struct{}
 
@@ -107,7 +107,6 @@ func (encodePlanInetCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (InetCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/int.go

@@ -26,7 +26,7 @@ type Int2 struct {
 	Valid bool
 }
 
-// ScanInt64 implements the Int64Scanner interface.
+// ScanInt64 implements the [Int64Scanner] interface.
 func (dst *Int2) ScanInt64(n Int8) error {
 	if !n.Valid {
 		*dst = Int2{}
@@ -44,11 +44,12 @@ func (dst *Int2) ScanInt64(n Int8) error {
 	return nil
 }
 
+// Int64Value implements the [Int64Valuer] interface.
 func (n Int2) Int64Value() (Int8, error) {
 	return Int8{Int64: int64(n.Int16), Valid: n.Valid}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int2) Scan(src any) error {
 	if src == nil {
 		*dst = Int2{}
@@ -87,7 +88,7 @@ func (dst *Int2) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int2) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -95,6 +96,7 @@ func (src Int2) Value() (driver.Value, error) {
 	return int64(src.Int16), nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Int2) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -102,6 +104,7 @@ func (src Int2) MarshalJSON() ([]byte, error) {
 	return []byte(strconv.FormatInt(int64(src.Int16), 10)), nil
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Int2) UnmarshalJSON(b []byte) error {
 	var n *int16
 	err := json.Unmarshal(b, &n)
@@ -586,7 +589,7 @@ type Int4 struct {
 	Valid bool
 }
 
-// ScanInt64 implements the Int64Scanner interface.
+// ScanInt64 implements the [Int64Scanner] interface.
 func (dst *Int4) ScanInt64(n Int8) error {
 	if !n.Valid {
 		*dst = Int4{}
@@ -604,11 +607,12 @@ func (dst *Int4) ScanInt64(n Int8) error {
 	return nil
 }
 
+// Int64Value implements the [Int64Valuer] interface.
 func (n Int4) Int64Value() (Int8, error) {
 	return Int8{Int64: int64(n.Int32), Valid: n.Valid}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int4) Scan(src any) error {
 	if src == nil {
 		*dst = Int4{}
@@ -647,7 +651,7 @@ func (dst *Int4) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int4) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -655,6 +659,7 @@ func (src Int4) Value() (driver.Value, error) {
 	return int64(src.Int32), nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Int4) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -662,6 +667,7 @@ func (src Int4) MarshalJSON() ([]byte, error) {
 	return []byte(strconv.FormatInt(int64(src.Int32), 10)), nil
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Int4) UnmarshalJSON(b []byte) error {
 	var n *int32
 	err := json.Unmarshal(b, &n)
@@ -1157,7 +1163,7 @@ type Int8 struct {
 	Valid bool
 }
 
-// ScanInt64 implements the Int64Scanner interface.
+// ScanInt64 implements the [Int64Scanner] interface.
 func (dst *Int8) ScanInt64(n Int8) error {
 	if !n.Valid {
 		*dst = Int8{}
@@ -1175,11 +1181,12 @@ func (dst *Int8) ScanInt64(n Int8) error {
 	return nil
 }
 
+// Int64Value implements the [Int64Valuer] interface.
 func (n Int8) Int64Value() (Int8, error) {
 	return Int8{Int64: int64(n.Int64), Valid: n.Valid}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int8) Scan(src any) error {
 	if src == nil {
 		*dst = Int8{}
@@ -1218,7 +1225,7 @@ func (dst *Int8) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int8) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -1226,6 +1233,7 @@ func (src Int8) Value() (driver.Value, error) {
 	return int64(src.Int64), nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Int8) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -1233,6 +1241,7 @@ func (src Int8) MarshalJSON() ([]byte, error) {
 	return []byte(strconv.FormatInt(int64(src.Int64), 10)), nil
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Int8) UnmarshalJSON(b []byte) error {
 	var n *int64
 	err := json.Unmarshal(b, &n)

pgtype/int.go.erb

@@ -27,7 +27,7 @@ type Int<%= pg_byte_size %> struct {
 	Valid bool
 }
 
-// ScanInt64 implements the Int64Scanner interface.
+// ScanInt64 implements the [Int64Scanner] interface.
 func (dst *Int<%= pg_byte_size %>) ScanInt64(n Int8) error {
 	if !n.Valid {
 		*dst = Int<%= pg_byte_size %>{}
@@ -45,11 +45,12 @@ func (dst *Int<%= pg_byte_size %>) ScanInt64(n Int8) error {
 	return nil
 }
 
+// Int64Value implements the [Int64Valuer] interface.
 func (n Int<%= pg_byte_size %>) Int64Value() (Int8, error) {
 	return Int8{Int64: int64(n.Int<%= pg_bit_size %>), Valid: n.Valid}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int<%= pg_byte_size %>) Scan(src any) error {
 	if src == nil {
 		*dst = Int<%= pg_byte_size %>{}
@@ -88,7 +89,7 @@ func (dst *Int<%= pg_byte_size %>) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int<%= pg_byte_size %>) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -96,6 +97,7 @@ func (src Int<%= pg_byte_size %>) Value() (driver.Value, error) {
 	return int64(src.Int<%= pg_bit_size %>), nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Int<%= pg_byte_size %>) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -103,6 +105,7 @@ func (src Int<%= pg_byte_size %>) MarshalJSON() ([]byte, error) {
 	return []byte(strconv.FormatInt(int64(src.Int<%= pg_bit_size %>), 10)), nil
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Int<%= pg_byte_size %>) UnmarshalJSON(b []byte) error {
 	var n *int<%= pg_bit_size %>
 	err := json.Unmarshal(b, &n)

pgtype/interval.go

@@ -33,16 +33,18 @@ type Interval struct {
 	Valid        bool
 }
 
+// ScanInterval implements the [IntervalScanner] interface.
 func (interval *Interval) ScanInterval(v Interval) error {
 	*interval = v
 	return nil
 }
 
+// IntervalValue implements the [IntervalValuer] interface.
 func (interval Interval) IntervalValue() (Interval, error) {
 	return interval, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (interval *Interval) Scan(src any) error {
 	if src == nil {
 		*interval = Interval{}
@@ -57,7 +59,7 @@ func (interval *Interval) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (interval Interval) Value() (driver.Value, error) {
 	if !interval.Valid {
 		return nil, nil
@@ -157,7 +159,6 @@ func (encodePlanIntervalCodecText) Encode(value any, buf []byte) (newBuf []byte,
 }
 
 func (IntervalCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/jsonb_test.go

@@ -95,7 +95,8 @@ func TestJSONBCodecCustomMarshal(t *testing.T) {
 				Unmarshal: func(data []byte, v any) error {
 					return json.Unmarshal([]byte(`{"custom":"value"}`), v)
 				},
-			}})
+			},
+		})
 	}
 
 	pgxtest.RunValueRoundTripTests(context.Background(), t, connTestRunner, pgxtest.KnownOIDQueryExecModes, "jsonb", []pgxtest.ValueRoundTripTest{

pgtype/line.go

@@ -24,11 +24,13 @@ type Line struct {
 	Valid   bool
 }
 
+// ScanLine implements the [LineScanner] interface.
 func (line *Line) ScanLine(v Line) error {
 	*line = v
 	return nil
 }
 
+// LineValue implements the [LineValuer] interface.
 func (line Line) LineValue() (Line, error) {
 	return line, nil
 }
@@ -37,7 +39,7 @@ func (line *Line) Set(src any) error {
 	return fmt.Errorf("cannot convert %v to Line", src)
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (line *Line) Scan(src any) error {
 	if src == nil {
 		*line = Line{}
@@ -52,7 +54,7 @@ func (line *Line) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (line Line) Value() (driver.Value, error) {
 	if !line.Valid {
 		return nil, nil
@@ -129,7 +131,6 @@ func (encodePlanLineCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (LineCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/lseg.go

@@ -24,16 +24,18 @@ type Lseg struct {
 	Valid bool
 }
 
+// ScanLseg implements the [LsegScanner] interface.
 func (lseg *Lseg) ScanLseg(v Lseg) error {
 	*lseg = v
 	return nil
 }
 
+// LsegValue implements the [LsegValuer] interface.
 func (lseg Lseg) LsegValue() (Lseg, error) {
 	return lseg, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (lseg *Lseg) Scan(src any) error {
 	if src == nil {
 		*lseg = Lseg{}
@@ -48,7 +50,7 @@ func (lseg *Lseg) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (lseg Lseg) Value() (driver.Value, error) {
 	if !lseg.Valid {
 		return nil, nil
@@ -127,7 +129,6 @@ func (encodePlanLsegCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (LsegCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/multirange.go

@@ -374,7 +374,6 @@ parseValueLoop:
 	}
 
 	return elements, nil
-
 }
 
 func parseRange(buf *bytes.Buffer) (string, error) {
@@ -403,8 +402,8 @@ func parseRange(buf *bytes.Buffer) (string, error) {
 
 // Multirange is a generic multirange type.
 //
-// T should implement RangeValuer and *T should implement RangeScanner. However, there does not appear to be a way to
-// enforce the RangeScanner constraint.
+// T should implement [RangeValuer] and *T should implement [RangeScanner]. However, there does not appear to be a way to
+// enforce the [RangeScanner] constraint.
 type Multirange[T RangeValuer] []T
 
 func (r Multirange[T]) IsNull() bool {

pgtype/multirange_test.go

@@ -71,7 +71,6 @@ func TestMultirangeCodecDecodeValue(t *testing.T) {
 	skipCockroachDB(t, "Server does not support range types (see https://github.com/cockroachdb/cockroach/issues/27791)")
 
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, _ testing.TB, conn *pgx.Conn) {
-
 		for _, tt := range []struct {
 			sql      string
 			expected any

pgtype/numeric.go

@@ -27,16 +27,20 @@ const (
 	pgNumericNegInfSign = 0xf000
 )
 
-var big0 *big.Int = big.NewInt(0)
-var big1 *big.Int = big.NewInt(1)
-var big10 *big.Int = big.NewInt(10)
-var big100 *big.Int = big.NewInt(100)
-var big1000 *big.Int = big.NewInt(1000)
+var (
+	big0    *big.Int = big.NewInt(0)
+	big1    *big.Int = big.NewInt(1)
+	big10   *big.Int = big.NewInt(10)
+	big100  *big.Int = big.NewInt(100)
+	big1000 *big.Int = big.NewInt(1000)
+)
 
-var bigNBase *big.Int = big.NewInt(nbase)
-var bigNBaseX2 *big.Int = big.NewInt(nbase * nbase)
-var bigNBaseX3 *big.Int = big.NewInt(nbase * nbase * nbase)
-var bigNBaseX4 *big.Int = big.NewInt(nbase * nbase * nbase * nbase)
+var (
+	bigNBase   *big.Int = big.NewInt(nbase)
+	bigNBaseX2 *big.Int = big.NewInt(nbase * nbase)
+	bigNBaseX3 *big.Int = big.NewInt(nbase * nbase * nbase)
+	bigNBaseX4 *big.Int = big.NewInt(nbase * nbase * nbase * nbase)
+)
 
 type NumericScanner interface {
 	ScanNumeric(v Numeric) error
@@ -54,15 +58,18 @@ type Numeric struct {
 	Valid            bool
 }
 
+// ScanNumeric implements the [NumericScanner] interface.
 func (n *Numeric) ScanNumeric(v Numeric) error {
 	*n = v
 	return nil
 }
 
+// NumericValue implements the [NumericValuer] interface.
 func (n Numeric) NumericValue() (Numeric, error) {
 	return n, nil
 }
 
+// Float64Value implements the [Float64Valuer] interface.
 func (n Numeric) Float64Value() (Float8, error) {
 	if !n.Valid {
 		return Float8{}, nil
@@ -92,6 +99,7 @@ func (n Numeric) Float64Value() (Float8, error) {
 	return Float8{Float64: f, Valid: true}, nil
 }
 
+// ScanInt64 implements the [Int64Scanner] interface.
 func (n *Numeric) ScanInt64(v Int8) error {
 	if !v.Valid {
 		*n = Numeric{}
@@ -102,6 +110,7 @@ func (n *Numeric) ScanInt64(v Int8) error {
 	return nil
 }
 
+// Int64Value implements the [Int64Valuer] interface.
 func (n Numeric) Int64Value() (Int8, error) {
 	if !n.Valid {
 		return Int8{}, nil
@@ -203,7 +212,7 @@ func nbaseDigitsToInt64(src []byte) (accum int64, bytesRead, digitsRead int) {
 	return accum, rp, digits
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (n *Numeric) Scan(src any) error {
 	if src == nil {
 		*n = Numeric{}
@@ -218,7 +227,7 @@ func (n *Numeric) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (n Numeric) Value() (driver.Value, error) {
 	if !n.Valid {
 		return nil, nil
@@ -231,6 +240,7 @@ func (n Numeric) Value() (driver.Value, error) {
 	return string(buf), err
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (n Numeric) MarshalJSON() ([]byte, error) {
 	if !n.Valid {
 		return []byte("null"), nil
@@ -243,6 +253,7 @@ func (n Numeric) MarshalJSON() ([]byte, error) {
 	return n.numberTextBytes(), nil
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (n *Numeric) UnmarshalJSON(src []byte) error {
 	if bytes.Equal(src, []byte(`null`)) {
 		*n = Numeric{}
@@ -553,7 +564,6 @@ func encodeNumericText(n Numeric, buf []byte) (newBuf []byte, err error) {
 }
 
 func (NumericCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/numeric_test.go

@@ -198,7 +198,6 @@ func TestNumericMarshalJSON(t *testing.T) {
 	skipCockroachDB(t, "server formats numeric text format differently")
 
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		for i, tt := range []struct {
 			decString string
 		}{

pgtype/path.go

@@ -25,16 +25,18 @@ type Path struct {
 	Valid  bool
 }
 
+// ScanPath implements the [PathScanner] interface.
 func (path *Path) ScanPath(v Path) error {
 	*path = v
 	return nil
 }
 
+// PathValue implements the [PathValuer] interface.
 func (path Path) PathValue() (Path, error) {
 	return path, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (path *Path) Scan(src any) error {
 	if src == nil {
 		*path = Path{}
@@ -49,7 +51,7 @@ func (path *Path) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (path Path) Value() (driver.Value, error) {
 	if !path.Valid {
 		return nil, nil
@@ -154,7 +156,6 @@ func (encodePlanPathCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (PathCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/pgtype.go

@@ -2010,7 +2010,7 @@ var valuerReflectType = reflect.TypeFor[driver.Valuer]()
 
 // isNilDriverValuer returns true if value is any type of nil unless it implements driver.Valuer. *T is not considered to implement
 // driver.Valuer if it is only implemented by T.
-func isNilDriverValuer(value any) (isNil bool, callNilDriverValuer bool) {
+func isNilDriverValuer(value any) (isNil, callNilDriverValuer bool) {
 	if value == nil {
 		return true, false
 	}

pgtype/pgtype_test.go

@@ -34,17 +34,19 @@ func init() {
 }
 
 // Test for renamed types
-type _string string
-type _bool bool
-type _uint8 uint8
-type _int8 int8
-type _int16 int16
-type _int16Slice []int16
-type _int32Slice []int32
-type _int64Slice []int64
-type _float32Slice []float32
-type _float64Slice []float64
-type _byteSlice []byte
+type (
+	_string       string
+	_bool         bool
+	_uint8        uint8
+	_int8         int8
+	_int16        int16
+	_int16Slice   []int16
+	_int32Slice   []int32
+	_int64Slice   []int64
+	_float32Slice []float32
+	_float64Slice []float64
+	_byteSlice    []byte
+)
 
 // unregisteredOID represents an actual type that is not registered. Cannot use 0 because that represents that the type
 // is not known (e.g. when using the simple protocol).
@@ -530,7 +532,8 @@ func TestMapEncodePlanCacheUUIDTypeConfusion(t *testing.T) {
 		0, 0, 0, 16,
 		0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
 		0, 0, 0, 16,
-		15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}
+		15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
+	}
 
 	m := pgtype.NewMap()
 	buf, err := m.Encode(pgtype.UUIDArrayOID, pgtype.BinaryFormatCode,

pgtype/point.go

@@ -30,11 +30,13 @@ type Point struct {
 	Valid bool
 }
 
+// ScanPoint implements the [PointScanner] interface.
 func (p *Point) ScanPoint(v Point) error {
 	*p = v
 	return nil
 }
 
+// PointValue implements the [PointValuer] interface.
 func (p Point) PointValue() (Point, error) {
 	return p, nil
 }
@@ -68,7 +70,7 @@ func parsePoint(src []byte) (*Point, error) {
 	return &Point{P: Vec2{x, y}, Valid: true}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Point) Scan(src any) error {
 	if src == nil {
 		*dst = Point{}
@@ -83,7 +85,7 @@ func (dst *Point) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Point) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -96,6 +98,7 @@ func (src Point) Value() (driver.Value, error) {
 	return string(buf), err
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Point) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -108,6 +111,7 @@ func (src Point) MarshalJSON() ([]byte, error) {
 	return buff.Bytes(), nil
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Point) UnmarshalJSON(point []byte) error {
 	p, err := parsePoint(point)
 	if err != nil {
@@ -178,7 +182,6 @@ func (encodePlanPointCodecText) Encode(value any, buf []byte) (newBuf []byte, er
 }
 
 func (PointCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/polygon.go

@@ -24,16 +24,18 @@ type Polygon struct {
 	Valid bool
 }
 
+// ScanPolygon implements the [PolygonScanner] interface.
 func (p *Polygon) ScanPolygon(v Polygon) error {
 	*p = v
 	return nil
 }
 
+// PolygonValue implements the [PolygonValuer] interface.
 func (p Polygon) PolygonValue() (Polygon, error) {
 	return p, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (p *Polygon) Scan(src any) error {
 	if src == nil {
 		*p = Polygon{}
@@ -48,7 +50,7 @@ func (p *Polygon) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (p Polygon) Value() (driver.Value, error) {
 	if !p.Valid {
 		return nil, nil
@@ -139,7 +141,6 @@ func (encodePlanPolygonCodecText) Encode(value any, buf []byte) (newBuf []byte,
 }
 
 func (PolygonCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/range.go

@@ -191,11 +191,13 @@ type untypedBinaryRange struct {
 // 18 = [      = 10010
 // 24 =        = 11000
 
-const emptyMask = 1
-const lowerInclusiveMask = 2
-const upperInclusiveMask = 4
-const lowerUnboundedMask = 8
-const upperUnboundedMask = 16
+const (
+	emptyMask          = 1
+	lowerInclusiveMask = 2
+	upperInclusiveMask = 4
+	lowerUnboundedMask = 8
+	upperUnboundedMask = 16
+)
 
 func parseUntypedBinaryRange(src []byte) (*untypedBinaryRange, error) {
 	ubr := &untypedBinaryRange{}
@@ -273,7 +275,6 @@ func parseUntypedBinaryRange(src []byte) (*untypedBinaryRange, error) {
 	}
 
 	return ubr, nil
-
 }
 
 // Range is a generic range type.

pgtype/range_codec_test.go

@@ -75,7 +75,6 @@ func TestRangeCodecScanRangeTwiceWithUnbounded(t *testing.T) {
 	skipCockroachDB(t, "Server does not support range types (see https://github.com/cockroachdb/cockroach/issues/27791)")
 
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
-
 		var r pgtype.Range[pgtype.Int4]
 
 		err := conn.QueryRow(context.Background(), `select '[1,5)'::int4range`).Scan(&r)
@@ -129,7 +128,6 @@ func TestRangeCodecDecodeValue(t *testing.T) {
 	skipCockroachDB(t, "Server does not support range types (see https://github.com/cockroachdb/cockroach/issues/27791)")
 
 	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, _ testing.TB, conn *pgx.Conn) {
-
 		for _, tt := range []struct {
 			sql      string
 			expected any

pgtype/record_codec.go

@@ -121,5 +121,4 @@ func (RecordCodec) DecodeValue(m *Map, oid uint32, format int16, src []byte) (an
 	default:
 		return nil, fmt.Errorf("unknown format code %d", format)
 	}
-
 }

pgtype/text.go

@@ -19,16 +19,18 @@ type Text struct {
 	Valid  bool
 }
 
+// ScanText implements the [TextScanner] interface.
 func (t *Text) ScanText(v Text) error {
 	*t = v
 	return nil
 }
 
+// TextValue implements the [TextValuer] interface.
 func (t Text) TextValue() (Text, error) {
 	return t, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Text) Scan(src any) error {
 	if src == nil {
 		*dst = Text{}
@@ -47,7 +49,7 @@ func (dst *Text) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Text) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -55,6 +57,7 @@ func (src Text) Value() (driver.Value, error) {
 	return src.String, nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src Text) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -63,6 +66,7 @@ func (src Text) MarshalJSON() ([]byte, error) {
 	return json.Marshal(src.String)
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *Text) UnmarshalJSON(b []byte) error {
 	var s *string
 	err := json.Unmarshal(b, &s)
@@ -146,7 +150,6 @@ func (encodePlanTextCodecTextValuer) Encode(value any, buf []byte) (newBuf []byt
 }
 
 func (TextCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case TextFormatCode, BinaryFormatCode:
 		switch target.(type) {

pgtype/tid.go

@@ -35,16 +35,18 @@ type TID struct {
 	Valid        bool
 }
 
+// ScanTID implements the [TIDScanner] interface.
 func (b *TID) ScanTID(v TID) error {
 	*b = v
 	return nil
 }
 
+// TIDValue implements the [TIDValuer] interface.
 func (b TID) TIDValue() (TID, error) {
 	return b, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *TID) Scan(src any) error {
 	if src == nil {
 		*dst = TID{}
@@ -59,7 +61,7 @@ func (dst *TID) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src TID) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -131,7 +133,6 @@ func (encodePlanTIDCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (TIDCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/time.go

@@ -29,16 +29,18 @@ type Time struct {
 	Valid        bool
 }
 
+// ScanTime implements the [TimeScanner] interface.
 func (t *Time) ScanTime(v Time) error {
 	*t = v
 	return nil
 }
 
+// TimeValue implements the [TimeValuer] interface.
 func (t Time) TimeValue() (Time, error) {
 	return t, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (t *Time) Scan(src any) error {
 	if src == nil {
 		*t = Time{}
@@ -58,7 +60,7 @@ func (t *Time) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (t Time) Value() (driver.Value, error) {
 	if !t.Valid {
 		return nil, nil
@@ -137,7 +139,6 @@ func (encodePlanTimeCodecText) Encode(value any, buf []byte) (newBuf []byte, err
 }
 
 func (TimeCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/timestamp.go

@@ -11,8 +11,10 @@ import (
 	"github.com/jackc/pgx/v5/internal/pgio"
 )
 
-const pgTimestampFormat = "2006-01-02 15:04:05.999999999"
-const jsonISO8601 = "2006-01-02T15:04:05.999999999"
+const (
+	pgTimestampFormat = "2006-01-02 15:04:05.999999999"
+	jsonISO8601       = "2006-01-02T15:04:05.999999999"
+)
 
 type TimestampScanner interface {
 	ScanTimestamp(v Timestamp) error
@@ -29,16 +31,18 @@ type Timestamp struct {
 	Valid            bool
 }
 
+// ScanTimestamp implements the [TimestampScanner] interface.
 func (ts *Timestamp) ScanTimestamp(v Timestamp) error {
 	*ts = v
 	return nil
 }
 
+// TimestampValue implements the [TimestampValuer] interface.
 func (ts Timestamp) TimestampValue() (Timestamp, error) {
 	return ts, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (ts *Timestamp) Scan(src any) error {
 	if src == nil {
 		*ts = Timestamp{}
@@ -56,7 +60,7 @@ func (ts *Timestamp) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (ts Timestamp) Value() (driver.Value, error) {
 	if !ts.Valid {
 		return nil, nil
@@ -68,6 +72,7 @@ func (ts Timestamp) Value() (driver.Value, error) {
 	return ts.Time, nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (ts Timestamp) MarshalJSON() ([]byte, error) {
 	if !ts.Valid {
 		return []byte("null"), nil
@@ -87,6 +92,7 @@ func (ts Timestamp) MarshalJSON() ([]byte, error) {
 	return json.Marshal(s)
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (ts *Timestamp) UnmarshalJSON(b []byte) error {
 	var s *string
 	err := json.Unmarshal(b, &s)

pgtype/timestamp_test.go

@@ -102,7 +102,6 @@ func TestTimestampCodecDecodeTextInvalid(t *testing.T) {
 }
 
 func TestTimestampMarshalJSON(t *testing.T) {
-
 	tsStruct := struct {
 		TS pgtype.Timestamp `json:"ts"`
 	}{}

pgtype/timestamptz.go

@@ -11,10 +11,12 @@ import (
 	"github.com/jackc/pgx/v5/internal/pgio"
 )
 
-const pgTimestamptzHourFormat = "2006-01-02 15:04:05.999999999Z07"
-const pgTimestamptzMinuteFormat = "2006-01-02 15:04:05.999999999Z07:00"
-const pgTimestamptzSecondFormat = "2006-01-02 15:04:05.999999999Z07:00:00"
-const microsecFromUnixEpochToY2K = 946684800 * 1000000
+const (
+	pgTimestamptzHourFormat    = "2006-01-02 15:04:05.999999999Z07"
+	pgTimestamptzMinuteFormat  = "2006-01-02 15:04:05.999999999Z07:00"
+	pgTimestamptzSecondFormat  = "2006-01-02 15:04:05.999999999Z07:00:00"
+	microsecFromUnixEpochToY2K = 946684800 * 1000000
+)
 
 const (
 	negativeInfinityMicrosecondOffset = -9223372036854775808
@@ -36,16 +38,18 @@ type Timestamptz struct {
 	Valid            bool
 }
 
+// ScanTimestamptz implements the [TimestamptzScanner] interface.
 func (tstz *Timestamptz) ScanTimestamptz(v Timestamptz) error {
 	*tstz = v
 	return nil
 }
 
+// TimestamptzValue implements the [TimestamptzValuer] interface.
 func (tstz Timestamptz) TimestamptzValue() (Timestamptz, error) {
 	return tstz, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (tstz *Timestamptz) Scan(src any) error {
 	if src == nil {
 		*tstz = Timestamptz{}
@@ -63,7 +67,7 @@ func (tstz *Timestamptz) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (tstz Timestamptz) Value() (driver.Value, error) {
 	if !tstz.Valid {
 		return nil, nil
@@ -75,6 +79,7 @@ func (tstz Timestamptz) Value() (driver.Value, error) {
 	return tstz.Time, nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (tstz Timestamptz) MarshalJSON() ([]byte, error) {
 	if !tstz.Valid {
 		return []byte("null"), nil
@@ -94,6 +99,7 @@ func (tstz Timestamptz) MarshalJSON() ([]byte, error) {
 	return json.Marshal(s)
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (tstz *Timestamptz) UnmarshalJSON(b []byte) error {
 	var s *string
 	err := json.Unmarshal(b, &s)
@@ -225,7 +231,6 @@ func (encodePlanTimestamptzCodecText) Encode(value any, buf []byte) (newBuf []by
 }
 
 func (c *TimestamptzCodec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/uint32.go

@@ -3,6 +3,7 @@ package pgtype
 import (
 	"database/sql/driver"
 	"encoding/binary"
+	"encoding/json"
 	"fmt"
 	"math"
 	"strconv"
@@ -24,16 +25,18 @@ type Uint32 struct {
 	Valid  bool
 }
 
+// ScanUint32 implements the [Uint32Scanner] interface.
 func (n *Uint32) ScanUint32(v Uint32) error {
 	*n = v
 	return nil
 }
 
+// Uint32Value implements the [Uint32Valuer] interface.
 func (n Uint32) Uint32Value() (Uint32, error) {
 	return n, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Uint32) Scan(src any) error {
 	if src == nil {
 		*dst = Uint32{}
@@ -67,7 +70,7 @@ func (dst *Uint32) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Uint32) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -75,6 +78,31 @@ func (src Uint32) Value() (driver.Value, error) {
 	return int64(src.Uint32), nil
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
+func (src Uint32) MarshalJSON() ([]byte, error) {
+	if !src.Valid {
+		return []byte("null"), nil
+	}
+	return json.Marshal(src.Uint32)
+}
+
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
+func (dst *Uint32) UnmarshalJSON(b []byte) error {
+	var n *uint32
+	err := json.Unmarshal(b, &n)
+	if err != nil {
+		return err
+	}
+
+	if n == nil {
+		*dst = Uint32{}
+	} else {
+		*dst = Uint32{Uint32: *n, Valid: true}
+	}
+
+	return nil
+}
+
 type Uint32Codec struct{}
 
 func (Uint32Codec) FormatSupported(format int16) bool {
@@ -197,7 +225,6 @@ func (encodePlanUint32CodecTextInt64Valuer) Encode(value any, buf []byte) (newBu
 }
 
 func (Uint32Codec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/uint64.go

@@ -24,16 +24,18 @@ type Uint64 struct {
 	Valid  bool
 }
 
+// ScanUint64 implements the [Uint64Scanner] interface.
 func (n *Uint64) ScanUint64(v Uint64) error {
 	*n = v
 	return nil
 }
 
+// Uint64Value implements the [Uint64Valuer] interface.
 func (n Uint64) Uint64Value() (Uint64, error) {
 	return n, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Uint64) Scan(src any) error {
 	if src == nil {
 		*dst = Uint64{}
@@ -63,7 +65,7 @@ func (dst *Uint64) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Uint64) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -194,7 +196,6 @@ func (encodePlanUint64CodecTextInt64Valuer) Encode(value any, buf []byte) (newBu
 }
 
 func (Uint64Codec) PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan {
-
 	switch format {
 	case BinaryFormatCode:
 		switch target.(type) {

pgtype/uuid.go

@@ -20,11 +20,13 @@ type UUID struct {
 	Valid bool
 }
 
+// ScanUUID implements the [UUIDScanner] interface.
 func (b *UUID) ScanUUID(v UUID) error {
 	*b = v
 	return nil
 }
 
+// UUIDValue implements the [UUIDValuer] interface.
 func (b UUID) UUIDValue() (UUID, error) {
 	return b, nil
 }
@@ -67,7 +69,7 @@ func encodeUUID(src [16]byte) string {
 	return string(buf[:])
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *UUID) Scan(src any) error {
 	if src == nil {
 		*dst = UUID{}
@@ -87,7 +89,7 @@ func (dst *UUID) Scan(src any) error {
 	return fmt.Errorf("cannot scan %T", src)
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src UUID) Value() (driver.Value, error) {
 	if !src.Valid {
 		return nil, nil
@@ -104,6 +106,7 @@ func (src UUID) String() string {
 	return encodeUUID(src.Bytes)
 }
 
+// MarshalJSON implements the [encoding/json.Marshaler] interface.
 func (src UUID) MarshalJSON() ([]byte, error) {
 	if !src.Valid {
 		return []byte("null"), nil
@@ -116,6 +119,7 @@ func (src UUID) MarshalJSON() ([]byte, error) {
 	return buff.Bytes(), nil
 }
 
+// UnmarshalJSON implements the [encoding/json.Unmarshaler] interface.
 func (dst *UUID) UnmarshalJSON(src []byte) error {
 	if bytes.Equal(src, []byte("null")) {
 		*dst = UUID{}

pgtype/zeronull/float8.go

@@ -8,9 +8,10 @@ import (
 
 type Float8 float64
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Float8) SkipUnderlyingTypePlan() {}
 
-// ScanFloat64 implements the Float64Scanner interface.
+// ScanFloat64 implements the [pgtype.Float64Scanner] interface.
 func (f *Float8) ScanFloat64(n pgtype.Float8) error {
 	if !n.Valid {
 		*f = 0
@@ -22,6 +23,7 @@ func (f *Float8) ScanFloat64(n pgtype.Float8) error {
 	return nil
 }
 
+// Float64Value implements the [pgtype.Float64Valuer] interface.
 func (f Float8) Float64Value() (pgtype.Float8, error) {
 	if f == 0 {
 		return pgtype.Float8{}, nil
@@ -29,7 +31,7 @@ func (f Float8) Float64Value() (pgtype.Float8, error) {
 	return pgtype.Float8{Float64: float64(f), Valid: true}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (f *Float8) Scan(src any) error {
 	if src == nil {
 		*f = 0
@@ -47,7 +49,7 @@ func (f *Float8) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (f Float8) Value() (driver.Value, error) {
 	if f == 0 {
 		return nil, nil

pgtype/zeronull/int.go

@@ -12,27 +12,36 @@ import (
 
 type Int2 int16
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Int2) SkipUnderlyingTypePlan() {}
 
-// ScanInt64 implements the Int64Scanner interface.
-func (dst *Int2) ScanInt64(n int64, valid bool) error {
-	if !valid {
+// ScanInt64 implements the [pgtype.Int64Scanner] interface.
+func (dst *Int2) ScanInt64(n pgtype.Int8) error {
+	if !n.Valid {
 		*dst = 0
 		return nil
 	}
 
-	if n < math.MinInt16 {
-		return fmt.Errorf("%d is greater than maximum value for Int2", n)
+	if n.Int64 < math.MinInt16 {
+		return fmt.Errorf("%d is less than minimum value for Int2", n.Int64)
 	}
-	if n > math.MaxInt16 {
-		return fmt.Errorf("%d is greater than maximum value for Int2", n)
+	if n.Int64 > math.MaxInt16 {
+		return fmt.Errorf("%d is greater than maximum value for Int2", n.Int64)
 	}
-	*dst = Int2(n)
+	*dst = Int2(n.Int64)
 
 	return nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Int64Value implements the [pgtype.Int64Valuer] interface.
+func (src Int2) Int64Value() (pgtype.Int8, error) {
+	if src == 0 {
+		return pgtype.Int8{}, nil
+	}
+	return pgtype.Int8{Int64: int64(src), Valid: true}, nil
+}
+
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int2) Scan(src any) error {
 	if src == nil {
 		*dst = 0
@@ -50,7 +59,7 @@ func (dst *Int2) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int2) Value() (driver.Value, error) {
 	if src == 0 {
 		return nil, nil
@@ -60,27 +69,36 @@ func (src Int2) Value() (driver.Value, error) {
 
 type Int4 int32
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Int4) SkipUnderlyingTypePlan() {}
 
-// ScanInt64 implements the Int64Scanner interface.
-func (dst *Int4) ScanInt64(n int64, valid bool) error {
-	if !valid {
+// ScanInt64 implements the [pgtype.Int64Scanner] interface.
+func (dst *Int4) ScanInt64(n pgtype.Int8) error {
+	if !n.Valid {
 		*dst = 0
 		return nil
 	}
 
-	if n < math.MinInt32 {
-		return fmt.Errorf("%d is greater than maximum value for Int4", n)
+	if n.Int64 < math.MinInt32 {
+		return fmt.Errorf("%d is less than minimum value for Int4", n.Int64)
 	}
-	if n > math.MaxInt32 {
-		return fmt.Errorf("%d is greater than maximum value for Int4", n)
+	if n.Int64 > math.MaxInt32 {
+		return fmt.Errorf("%d is greater than maximum value for Int4", n.Int64)
 	}
-	*dst = Int4(n)
+	*dst = Int4(n.Int64)
 
 	return nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Int64Value implements the [pgtype.Int64Valuer] interface.
+func (src Int4) Int64Value() (pgtype.Int8, error) {
+	if src == 0 {
+		return pgtype.Int8{}, nil
+	}
+	return pgtype.Int8{Int64: int64(src), Valid: true}, nil
+}
+
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int4) Scan(src any) error {
 	if src == nil {
 		*dst = 0
@@ -98,7 +116,7 @@ func (dst *Int4) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int4) Value() (driver.Value, error) {
 	if src == 0 {
 		return nil, nil
@@ -108,27 +126,36 @@ func (src Int4) Value() (driver.Value, error) {
 
 type Int8 int64
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Int8) SkipUnderlyingTypePlan() {}
 
-// ScanInt64 implements the Int64Scanner interface.
-func (dst *Int8) ScanInt64(n int64, valid bool) error {
-	if !valid {
+// ScanInt64 implements the [pgtype.Int64Scanner] interface.
+func (dst *Int8) ScanInt64(n pgtype.Int8) error {
+	if !n.Valid {
 		*dst = 0
 		return nil
 	}
 
-	if n < math.MinInt64 {
-		return fmt.Errorf("%d is greater than maximum value for Int8", n)
+	if n.Int64 < math.MinInt64 {
+		return fmt.Errorf("%d is less than minimum value for Int8", n.Int64)
 	}
-	if n > math.MaxInt64 {
-		return fmt.Errorf("%d is greater than maximum value for Int8", n)
+	if n.Int64 > math.MaxInt64 {
+		return fmt.Errorf("%d is greater than maximum value for Int8", n.Int64)
 	}
-	*dst = Int8(n)
+	*dst = Int8(n.Int64)
 
 	return nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Int64Value implements the [pgtype.Int64Valuer] interface.
+func (src Int8) Int64Value() (pgtype.Int8, error) {
+	if src == 0 {
+		return pgtype.Int8{}, nil
+	}
+	return pgtype.Int8{Int64: int64(src), Valid: true}, nil
+}
+
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int8) Scan(src any) error {
 	if src == nil {
 		*dst = 0
@@ -146,7 +173,7 @@ func (dst *Int8) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int8) Value() (driver.Value, error) {
 	if src == 0 {
 		return nil, nil

pgtype/zeronull/int.go.erb

@@ -12,27 +12,36 @@ import (
 <% pg_bit_size = pg_byte_size * 8 %>
 type Int<%= pg_byte_size %> int<%= pg_bit_size %>
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Int<%= pg_byte_size %>) SkipUnderlyingTypePlan() {}
 
-// ScanInt64 implements the Int64Scanner interface.
-func (dst *Int<%= pg_byte_size %>) ScanInt64(n int64, valid bool) error {
-	if !valid {
+// ScanInt64 implements the [pgtype.Int64Scanner] interface.
+func (dst *Int<%= pg_byte_size %>) ScanInt64(n pgtype.Int8) error {
+	if !n.Valid {
 		*dst = 0
 		return nil
 	}
 
-	if n < math.MinInt<%= pg_bit_size %> {
-		return fmt.Errorf("%d is greater than maximum value for Int<%= pg_byte_size %>", n)
+	if n.Int64 < math.MinInt<%= pg_bit_size %> {
+		return fmt.Errorf("%d is less than minimum value for Int<%= pg_byte_size %>", n.Int64)
 	}
-	if n > math.MaxInt<%= pg_bit_size %> {
-		return fmt.Errorf("%d is greater than maximum value for Int<%= pg_byte_size %>", n)
+	if n.Int64 > math.MaxInt<%= pg_bit_size %> {
+		return fmt.Errorf("%d is greater than maximum value for Int<%= pg_byte_size %>", n.Int64)
 	}
-	*dst = Int<%= pg_byte_size %>(n)
+	*dst = Int<%= pg_byte_size %>(n.Int64)
 
 	return nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Int64Value implements the [pgtype.Int64Valuer] interface.
+func (src Int<%= pg_byte_size %>) Int64Value() (pgtype.Int8, error) {
+	if src == 0 {
+		return pgtype.Int8{}, nil
+	}
+	return pgtype.Int8{Int64: int64(src), Valid: true}, nil
+}
+
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Int<%= pg_byte_size %>) Scan(src any) error {
 	if src == nil {
 		*dst = 0
@@ -50,7 +59,7 @@ func (dst *Int<%= pg_byte_size %>) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Int<%= pg_byte_size %>) Value() (driver.Value, error) {
 	if src == 0 {
 		return nil, nil

pgtype/zeronull/text.go

@@ -8,9 +8,10 @@ import (
 
 type Text string
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Text) SkipUnderlyingTypePlan() {}
 
-// ScanText implements the TextScanner interface.
+// ScanText implements the [pgtype.TextScanner] interface.
 func (dst *Text) ScanText(v pgtype.Text) error {
 	if !v.Valid {
 		*dst = ""
@@ -22,7 +23,7 @@ func (dst *Text) ScanText(v pgtype.Text) error {
 	return nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (dst *Text) Scan(src any) error {
 	if src == nil {
 		*dst = ""
@@ -40,7 +41,7 @@ func (dst *Text) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (src Text) Value() (driver.Value, error) {
 	if src == "" {
 		return nil, nil

pgtype/zeronull/timestamp.go

@@ -10,8 +10,10 @@ import (
 
 type Timestamp time.Time
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Timestamp) SkipUnderlyingTypePlan() {}
 
+// ScanTimestamp implements the [pgtype.TimestampScanner] interface.
 func (ts *Timestamp) ScanTimestamp(v pgtype.Timestamp) error {
 	if !v.Valid {
 		*ts = Timestamp{}
@@ -31,6 +33,7 @@ func (ts *Timestamp) ScanTimestamp(v pgtype.Timestamp) error {
 	}
 }
 
+// TimestampValue implements the [pgtype.TimestampValuer] interface.
 func (ts Timestamp) TimestampValue() (pgtype.Timestamp, error) {
 	if time.Time(ts).IsZero() {
 		return pgtype.Timestamp{}, nil
@@ -39,7 +42,7 @@ func (ts Timestamp) TimestampValue() (pgtype.Timestamp, error) {
 	return pgtype.Timestamp{Time: time.Time(ts), Valid: true}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (ts *Timestamp) Scan(src any) error {
 	if src == nil {
 		*ts = Timestamp{}
@@ -57,7 +60,7 @@ func (ts *Timestamp) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (ts Timestamp) Value() (driver.Value, error) {
 	if time.Time(ts).IsZero() {
 		return nil, nil

pgtype/zeronull/timestamptz.go

@@ -10,8 +10,10 @@ import (
 
 type Timestamptz time.Time
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (Timestamptz) SkipUnderlyingTypePlan() {}
 
+// ScanTimestamptz implements the [pgtype.TimestamptzScanner] interface.
 func (ts *Timestamptz) ScanTimestamptz(v pgtype.Timestamptz) error {
 	if !v.Valid {
 		*ts = Timestamptz{}
@@ -31,6 +33,7 @@ func (ts *Timestamptz) ScanTimestamptz(v pgtype.Timestamptz) error {
 	}
 }
 
+// TimestamptzValue implements the [pgtype.TimestamptzValuer] interface.
 func (ts Timestamptz) TimestamptzValue() (pgtype.Timestamptz, error) {
 	if time.Time(ts).IsZero() {
 		return pgtype.Timestamptz{}, nil
@@ -39,7 +42,7 @@ func (ts Timestamptz) TimestamptzValue() (pgtype.Timestamptz, error) {
 	return pgtype.Timestamptz{Time: time.Time(ts), Valid: true}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (ts *Timestamptz) Scan(src any) error {
 	if src == nil {
 		*ts = Timestamptz{}
@@ -57,7 +60,7 @@ func (ts *Timestamptz) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (ts Timestamptz) Value() (driver.Value, error) {
 	if time.Time(ts).IsZero() {
 		return nil, nil

pgtype/zeronull/uuid.go

@@ -8,9 +8,10 @@ import (
 
 type UUID [16]byte
 
+// SkipUnderlyingTypePlan implements the [pgtype.SkipUnderlyingTypePlanner] interface.
 func (UUID) SkipUnderlyingTypePlan() {}
 
-// ScanUUID implements the UUIDScanner interface.
+// ScanUUID implements the [pgtype.UUIDScanner] interface.
 func (u *UUID) ScanUUID(v pgtype.UUID) error {
 	if !v.Valid {
 		*u = UUID{}
@@ -22,6 +23,7 @@ func (u *UUID) ScanUUID(v pgtype.UUID) error {
 	return nil
 }
 
+// UUIDValue implements the [pgtype.UUIDValuer] interface.
 func (u UUID) UUIDValue() (pgtype.UUID, error) {
 	if u == (UUID{}) {
 		return pgtype.UUID{}, nil
@@ -29,7 +31,7 @@ func (u UUID) UUIDValue() (pgtype.UUID, error) {
 	return pgtype.UUID{Bytes: u, Valid: true}, nil
 }
 
-// Scan implements the database/sql Scanner interface.
+// Scan implements the [database/sql.Scanner] interface.
 func (u *UUID) Scan(src any) error {
 	if src == nil {
 		*u = UUID{}
@@ -47,7 +49,7 @@ func (u *UUID) Scan(src any) error {
 	return nil
 }
 
-// Value implements the database/sql/driver Valuer interface.
+// Value implements the [database/sql/driver.Valuer] interface.
 func (u UUID) Value() (driver.Value, error) {
 	if u == (UUID{}) {
 		return nil, nil

pgxpool/common_test.go

@@ -97,7 +97,8 @@ func testCopyFrom(t *testing.T, ctx context.Context, db interface {
 	execer
 	queryer
 	copyFromer
-}) {
+},
+) {
 	_, err := db.Exec(ctx, `create temporary table foo(a int2, b int4, c int8, d varchar, e text, f date, g timestamptz)`)
 	require.NoError(t, err)
 
@@ -141,6 +142,7 @@ func assertConfigsEqual(t *testing.T, expected, actual *pgxpool.Config, testName
 	// Can't test function equality, so just test that they are set or not.
 	assert.Equalf(t, expected.AfterConnect == nil, actual.AfterConnect == nil, "%s - AfterConnect", testName)
 	assert.Equalf(t, expected.BeforeAcquire == nil, actual.BeforeAcquire == nil, "%s - BeforeAcquire", testName)
+	assert.Equalf(t, expected.PrepareConn == nil, actual.PrepareConn == nil, "%s - PrepareConn", testName)
 	assert.Equalf(t, expected.AfterRelease == nil, actual.AfterRelease == nil, "%s - AfterRelease", testName)
 
 	assert.Equalf(t, expected.MaxConnLifetime, actual.MaxConnLifetime, "%s - MaxConnLifetime", testName)

pgxpool/pool.go

@@ -2,7 +2,7 @@ package pgxpool
 
 import (
 	"context"
-	"fmt"
+	"errors"
 	"math/rand"
 	"runtime"
 	"strconv"
@@ -15,12 +15,14 @@ import (
 	"github.com/jackc/puddle/v2"
 )
 
-var defaultMaxConns = int32(4)
-var defaultMinConns = int32(0)
-var defaultMinIdleConns = int32(0)
-var defaultMaxConnLifetime = time.Hour
-var defaultMaxConnIdleTime = time.Minute * 30
-var defaultHealthCheckPeriod = time.Minute
+var (
+	defaultMaxConns          = int32(4)
+	defaultMinConns          = int32(0)
+	defaultMinIdleConns      = int32(0)
+	defaultMaxConnLifetime   = time.Hour
+	defaultMaxConnIdleTime   = time.Minute * 30
+	defaultHealthCheckPeriod = time.Minute
+)
 
 type connResource struct {
 	conn       *pgx.Conn
@@ -84,9 +86,10 @@ type Pool struct {
 	config                *Config
 	beforeConnect         func(context.Context, *pgx.ConnConfig) error
 	afterConnect          func(context.Context, *pgx.Conn) error
-	beforeAcquire         func(context.Context, *pgx.Conn) bool
+	prepareConn           func(context.Context, *pgx.Conn) (bool, error)
 	afterRelease          func(*pgx.Conn) bool
 	beforeClose           func(*pgx.Conn)
+	shouldPing            func(context.Context, ShouldPingParams) bool
 	minConns              int32
 	minIdleConns          int32
 	maxConns              int32
@@ -104,6 +107,12 @@ type Pool struct {
 	closeChan chan struct{}
 }
 
+// ShouldPingParams are the parameters passed to ShouldPing.
+type ShouldPingParams struct {
+	Conn         *pgx.Conn
+	IdleDuration time.Duration
+}
+
 // Config is the configuration struct for creating a pool. It must be created by [ParseConfig] and then it can be
 // modified.
 type Config struct {
@@ -119,8 +128,23 @@ type Config struct {
 	// BeforeAcquire is called before a connection is acquired from the pool. It must return true to allow the
 	// acquisition or false to indicate that the connection should be destroyed and a different connection should be
 	// acquired.
+	//
+	// Deprecated: Use PrepareConn instead. If both PrepareConn and BeforeAcquire are set, PrepareConn will take
+	// precedence, ignoring BeforeAcquire.
 	BeforeAcquire func(context.Context, *pgx.Conn) bool
 
+	// PrepareConn is called before a connection is acquired from the pool. If this function returns true, the connection
+	// is considered valid, otherwise the connection is destroyed. If the function returns a non-nil error, the instigating
+	// query will fail with the returned error.
+	//
+	// Specifically, this means that:
+	//
+	// 	- If it returns true and a nil error, the query proceeds as normal.
+	// 	- If it returns true and an error, the connection will be returned to the pool, and the instigating query will fail with the returned error.
+	// 	- If it returns false, and an error, the connection will be destroyed, and the query will fail with the returned error.
+	// 	- If it returns false and a nil error, the connection will be destroyed, and the instigating query will be retried on a new connection.
+	PrepareConn func(context.Context, *pgx.Conn) (bool, error)
+
 	// AfterRelease is called after a connection is released, but before it is returned to the pool. It must return true to
 	// return the connection to the pool or false to destroy the connection.
 	AfterRelease func(*pgx.Conn) bool
@@ -128,6 +152,10 @@ type Config struct {
 	// BeforeClose is called right before a connection is closed and removed from the pool.
 	BeforeClose func(*pgx.Conn)
 
+	// ShouldPing is called after a connection is acquired from the pool. If it returns true, the connection is pinged to check for liveness.
+	// If this func is not set, the default behavior is to ping connections that have been idle for at least 1 second.
+	ShouldPing func(context.Context, ShouldPingParams) bool
+
 	// MaxConnLifetime is the duration since creation after which a connection will be automatically closed.
 	MaxConnLifetime time.Duration
 
@@ -190,11 +218,18 @@ func NewWithConfig(ctx context.Context, config *Config) (*Pool, error) {
 		panic("config must be created by ParseConfig")
 	}
 
+	prepareConn := config.PrepareConn
+	if prepareConn == nil && config.BeforeAcquire != nil {
+		prepareConn = func(ctx context.Context, conn *pgx.Conn) (bool, error) {
+			return config.BeforeAcquire(ctx, conn), nil
+		}
+	}
+
 	p := &Pool{
 		config:                config,
 		beforeConnect:         config.BeforeConnect,
 		afterConnect:          config.AfterConnect,
-		beforeAcquire:         config.BeforeAcquire,
+		prepareConn:           prepareConn,
 		afterRelease:          config.AfterRelease,
 		beforeClose:           config.BeforeClose,
 		minConns:              config.MinConns,
@@ -216,6 +251,14 @@ func NewWithConfig(ctx context.Context, config *Config) (*Pool, error) {
 		p.releaseTracer = t
 	}
 
+	if config.ShouldPing != nil {
+		p.shouldPing = config.ShouldPing
+	} else {
+		p.shouldPing = func(ctx context.Context, params ShouldPingParams) bool {
+			return params.IdleDuration > time.Second
+		}
+	}
+
 	var err error
 	p.p, err = puddle.NewPool(
 		&puddle.Config[*connResource]{
@@ -321,10 +364,10 @@ func ParseConfig(connString string) (*Config, error) {
 		delete(connConfig.Config.RuntimeParams, "pool_max_conns")
 		n, err := strconv.ParseInt(s, 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("cannot parse pool_max_conns: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse pool_max_conns", err)
 		}
 		if n < 1 {
-			return nil, fmt.Errorf("pool_max_conns too small: %d", n)
+			return nil, pgconn.NewParseConfigError(connString, "pool_max_conns too small", err)
 		}
 		config.MaxConns = int32(n)
 	} else {
@@ -338,7 +381,7 @@ func ParseConfig(connString string) (*Config, error) {
 		delete(connConfig.Config.RuntimeParams, "pool_min_conns")
 		n, err := strconv.ParseInt(s, 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("cannot parse pool_min_conns: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse pool_min_conns", err)
 		}
 		config.MinConns = int32(n)
 	} else {
@@ -349,7 +392,7 @@ func ParseConfig(connString string) (*Config, error) {
 		delete(connConfig.Config.RuntimeParams, "pool_min_idle_conns")
 		n, err := strconv.ParseInt(s, 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("cannot parse pool_min_idle_conns: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse pool_min_idle_conns", err)
 		}
 		config.MinIdleConns = int32(n)
 	} else {
@@ -360,7 +403,7 @@ func ParseConfig(connString string) (*Config, error) {
 		delete(connConfig.Config.RuntimeParams, "pool_max_conn_lifetime")
 		d, err := time.ParseDuration(s)
 		if err != nil {
-			return nil, fmt.Errorf("invalid pool_max_conn_lifetime: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse pool_max_conn_lifetime", err)
 		}
 		config.MaxConnLifetime = d
 	} else {
@@ -371,7 +414,7 @@ func ParseConfig(connString string) (*Config, error) {
 		delete(connConfig.Config.RuntimeParams, "pool_max_conn_idle_time")
 		d, err := time.ParseDuration(s)
 		if err != nil {
-			return nil, fmt.Errorf("invalid pool_max_conn_idle_time: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse pool_max_conn_idle_time", err)
 		}
 		config.MaxConnIdleTime = d
 	} else {
@@ -382,7 +425,7 @@ func ParseConfig(connString string) (*Config, error) {
 		delete(connConfig.Config.RuntimeParams, "pool_health_check_period")
 		d, err := time.ParseDuration(s)
 		if err != nil {
-			return nil, fmt.Errorf("invalid pool_health_check_period: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse pool_health_check_period", err)
 		}
 		config.HealthCheckPeriod = d
 	} else {
@@ -393,7 +436,7 @@ func ParseConfig(connString string) (*Config, error) {
 		delete(connConfig.Config.RuntimeParams, "pool_max_conn_lifetime_jitter")
 		d, err := time.ParseDuration(s)
 		if err != nil {
-			return nil, fmt.Errorf("invalid pool_max_conn_lifetime_jitter: %w", err)
+			return nil, pgconn.NewParseConfigError(connString, "cannot parse pool_max_conn_lifetime_jitter", err)
 		}
 		config.MaxConnLifetimeJitter = d
 	}
@@ -545,7 +588,10 @@ func (p *Pool) Acquire(ctx context.Context) (c *Conn, err error) {
 		}()
 	}
 
-	for {
+	// Try to acquire from the connection pool up to maxConns + 1 times, so that
+	// any that fatal errors would empty the pool and still at least try 1 fresh
+	// connection.
+	for range p.maxConns + 1 {
 		res, err := p.p.Acquire(ctx)
 		if err != nil {
 			return nil, err
@@ -553,7 +599,8 @@ func (p *Pool) Acquire(ctx context.Context) (c *Conn, err error) {
 
 		cr := res.Value()
 
-		if res.IdleDuration() > time.Second {
+		shouldPingParams := ShouldPingParams{Conn: cr.conn, IdleDuration: res.IdleDuration()}
+		if p.shouldPing(ctx, shouldPingParams) {
 			err := cr.conn.Ping(ctx)
 			if err != nil {
 				res.Destroy()
@@ -561,12 +608,25 @@ func (p *Pool) Acquire(ctx context.Context) (c *Conn, err error) {
 			}
 		}
 
-		if p.beforeAcquire == nil || p.beforeAcquire(ctx, cr.conn) {
-			return cr.getConn(p, res), nil
+		if p.prepareConn != nil {
+			ok, err := p.prepareConn(ctx, cr.conn)
+			if !ok {
+				res.Destroy()
+			}
+			if err != nil {
+				if ok {
+					res.Release()
+				}
+				return nil, err
+			}
+			if !ok {
+				continue
+			}
 		}
 
-		res.Destroy()
+		return cr.getConn(p, res), nil
 	}
+	return nil, errors.New("pgxpool: detected infinite loop acquiring connection; likely bug in PrepareConn or BeforeAcquire hook")
 }
 
 // AcquireFunc acquires a *Conn and calls f with that *Conn. ctx will only affect the Acquire. It has no effect on the
@@ -589,11 +649,14 @@ func (p *Pool) AcquireAllIdle(ctx context.Context) []*Conn {
 	conns := make([]*Conn, 0, len(resources))
 	for _, res := range resources {
 		cr := res.Value()
-		if p.beforeAcquire == nil || p.beforeAcquire(ctx, cr.conn) {
-			conns = append(conns, cr.getConn(p, res))
-		} else {
-			res.Destroy()
+		if p.prepareConn != nil {
+			ok, err := p.prepareConn(ctx, cr.conn)
+			if !ok || err != nil {
+				res.Destroy()
+				continue
+			}
 		}
+		conns = append(conns, cr.getConn(p, res))
 	}
 
 	return conns

pgxpool/pool_test.go

@@ -204,6 +204,47 @@ func TestPoolAcquireChecksIdleConns(t *testing.T) {
 	require.NotContains(t, pids, cPID)
 }
 
+func TestPoolAcquireChecksIdleConnsWithShouldPing(t *testing.T) {
+	t.Parallel()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
+	defer cancel()
+
+	controllerConn, err := pgx.Connect(ctx, os.Getenv("PGX_TEST_DATABASE"))
+	require.NoError(t, err)
+	defer controllerConn.Close(ctx)
+
+	config, err := pgxpool.ParseConfig(os.Getenv("PGX_TEST_DATABASE"))
+	require.NoError(t, err)
+
+	// Replace the default ShouldPing func
+	var shouldPingLastCalledWith *pgxpool.ShouldPingParams
+	config.ShouldPing = func(ctx context.Context, params pgxpool.ShouldPingParams) bool {
+		shouldPingLastCalledWith = &params
+		return false
+	}
+
+	pool, err := pgxpool.NewWithConfig(ctx, config)
+	require.NoError(t, err)
+	defer pool.Close()
+
+	c, err := pool.Acquire(ctx)
+	require.NoError(t, err)
+	c.Release()
+
+	time.Sleep(time.Millisecond * 200)
+
+	c, err = pool.Acquire(ctx)
+	require.NoError(t, err)
+	conn := c.Conn()
+
+	require.NotNil(t, shouldPingLastCalledWith)
+	assert.Equal(t, conn, shouldPingLastCalledWith.Conn)
+	assert.InDelta(t, time.Millisecond*200, shouldPingLastCalledWith.IdleDuration, float64(time.Millisecond*100))
+
+	c.Release()
+}
+
 func TestPoolAcquireFunc(t *testing.T) {
 	t.Parallel()
 
@@ -330,6 +371,64 @@ func TestPoolBeforeAcquire(t *testing.T) {
 	assert.EqualValues(t, 12, acquireAttempts)
 }
 
+func TestPoolPrepareConn(t *testing.T) {
+	t.Parallel()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
+	defer cancel()
+
+	config, err := pgxpool.ParseConfig(os.Getenv("PGX_TEST_DATABASE"))
+	require.NoError(t, err)
+
+	acquireAttempts := 0
+
+	config.PrepareConn = func(context.Context, *pgx.Conn) (bool, error) {
+		acquireAttempts++
+		var err error
+		if acquireAttempts%3 == 0 {
+			err = errors.New("PrepareConn error")
+		}
+		return acquireAttempts%2 == 0, err
+	}
+
+	db, err := pgxpool.NewWithConfig(ctx, config)
+	require.NoError(t, err)
+	t.Cleanup(db.Close)
+
+	var errorCount int
+	conns := make([]*pgxpool.Conn, 0, 4)
+	for {
+		conn, err := db.Acquire(ctx)
+		if err != nil {
+			errorCount++
+			continue
+		}
+		conns = append(conns, conn)
+		if len(conns) == 4 {
+			break
+		}
+	}
+	const wantErrorCount = 3
+	assert.Equal(t, wantErrorCount, errorCount, "Acquire() should have failed %d times", wantErrorCount)
+
+	for _, c := range conns {
+		c.Release()
+	}
+	waitForReleaseToComplete()
+
+	assert.EqualValues(t, len(conns)*2+wantErrorCount-1, acquireAttempts)
+
+	conns = db.AcquireAllIdle(ctx)
+	assert.Len(t, conns, 1)
+
+	for _, c := range conns {
+		c.Release()
+	}
+	waitForReleaseToComplete()
+
+	assert.EqualValues(t, 14, acquireAttempts)
+}
+
 func TestPoolAfterRelease(t *testing.T) {
 	t.Parallel()
 
@@ -677,7 +776,6 @@ func TestPoolQuery(t *testing.T) {
 	stats = pool.Stat()
 	assert.EqualValues(t, 0, stats.AcquiredConns())
 	assert.EqualValues(t, 1, stats.TotalConns())
-
 }
 
 func TestPoolQueryRow(t *testing.T) {
@@ -1082,9 +1180,9 @@ func TestConnectEagerlyReachesMinPoolSize(t *testing.T) {
 	acquireAttempts := int64(0)
 	connectAttempts := int64(0)
 
-	config.BeforeAcquire = func(ctx context.Context, conn *pgx.Conn) bool {
+	config.PrepareConn = func(ctx context.Context, conn *pgx.Conn) (bool, error) {
 		atomic.AddInt64(&acquireAttempts, 1)
-		return true
+		return true, nil
 	}
 	config.BeforeConnect = func(ctx context.Context, cfg *pgx.ConnConfig) error {
 		atomic.AddInt64(&connectAttempts, 1)
@@ -1105,7 +1203,6 @@ func TestConnectEagerlyReachesMinPoolSize(t *testing.T) {
 	}
 
 	t.Fatal("did not reach min pool size")
-
 }
 
 func TestPoolSendBatchBatchCloseTwice(t *testing.T) {

query_test.go

@@ -568,7 +568,6 @@ func TestConnQueryErrorWhileReturningRows(t *testing.T) {
 			ensureConnValid(t, conn)
 		}()
 	}
-
 }
 
 func TestQueryEncodeError(t *testing.T) {
@@ -2208,7 +2207,6 @@ insert into products (name, price) values
 	}
 
 	rows, err := conn.Query(ctx, "select name, price from products where price < $1 order by price desc", 12)
-
 	// It is unnecessary to check err. If an error occurred it will be returned by rows.Err() later. But in rare
 	// cases it may be useful to detect the error as early as possible.
 	if err != nil {

rows.go

@@ -41,22 +41,19 @@ type Rows interface {
 	// when there was an error executing the query.
 	FieldDescriptions() []pgconn.FieldDescription
 
-	// Next prepares the next row for reading. It returns true if there is another
-	// row and false if no more rows are available or a fatal error has occurred.
-	// It automatically closes rows when all rows are read.
+	// Next prepares the next row for reading. It returns true if there is another row and false if no more rows are
+	// available or a fatal error has occurred. It automatically closes rows upon returning false (whether due to all rows
+	// having been read or due to an error).
 	//
-	// Callers should check rows.Err() after rows.Next() returns false to detect
-	// whether result-set reading ended prematurely due to an error. See
-	// Conn.Query for details.
+	// Callers should check rows.Err() after rows.Next() returns false to detect whether result-set reading ended
+	// prematurely due to an error. See Conn.Query for details.
 	//
-	// For simpler error handling, consider using the higher-level pgx v5
-	// CollectRows() and ForEachRow() helpers instead.
+	// For simpler error handling, consider using the higher-level pgx v5 CollectRows() and ForEachRow() helpers instead.
 	Next() bool
 
-	// Scan reads the values from the current row into dest values positionally.
-	// dest can include pointers to core types, values implementing the Scanner
-	// interface, and nil. nil will skip the value entirely. It is an error to
-	// call Scan without first calling Next() and checking that it returned true.
+	// Scan reads the values from the current row into dest values positionally. dest can include pointers to core types,
+	// values implementing the Scanner interface, and nil. nil will skip the value entirely. It is an error to call Scan
+	// without first calling Next() and checking that it returned true. Rows is automatically closed upon error.
 	Scan(dest ...any) error
 
 	// Values returns the decoded row values. As with Scan(), it is an error to
@@ -563,7 +560,7 @@ func (rs *mapRowScanner) ScanRow(rows Rows) error {
 	return nil
 }
 
-// RowToStructByPos returns a T scanned from row. T must be a struct. T must have the same number a public fields as row
+// RowToStructByPos returns a T scanned from row. T must be a struct. T must have the same number of public fields as row
 // has fields. The row and T fields will be matched by position. If the "db" struct tag is "-" then the field will be
 // ignored.
 func RowToStructByPos[T any](row CollectableRow) (T, error) {

stdlib/sql.go

@@ -471,7 +471,8 @@ func (c *Conn) ExecContext(ctx context.Context, query string, argsV []driver.Nam
 		return nil, driver.ErrBadConn
 	}
 
-	args := namedValueToInterface(argsV)
+	args := make([]any, len(argsV))
+	convertNamedArguments(args, argsV)
 
 	commandTag, err := c.conn.Exec(ctx, query, args...)
 	// if we got a network error before we had a chance to send the query, retry
@@ -488,8 +489,9 @@ func (c *Conn) QueryContext(ctx context.Context, query string, argsV []driver.Na
 		return nil, driver.ErrBadConn
 	}
 
-	args := []any{databaseSQLResultFormats}
-	args = append(args, namedValueToInterface(argsV)...)
+	args := make([]any, 1+len(argsV))
+	args[0] = databaseSQLResultFormats
+	convertNamedArguments(args[1:], argsV)
 
 	rows, err := c.conn.Query(ctx, query, args...)
 	if err != nil {
@@ -848,28 +850,14 @@ func (r *Rows) Next(dest []driver.Value) error {
 	return nil
 }
 
-func valueToInterface(argsV []driver.Value) []any {
-	args := make([]any, 0, len(argsV))
-	for _, v := range argsV {
-		if v != nil {
-			args = append(args, v.(any))
-		} else {
-			args = append(args, nil)
-		}
-	}
-	return args
-}
-
-func namedValueToInterface(argsV []driver.NamedValue) []any {
-	args := make([]any, 0, len(argsV))
-	for _, v := range argsV {
+func convertNamedArguments(args []any, argsV []driver.NamedValue) {
+	for i, v := range argsV {
 		if v.Value != nil {
-			args = append(args, v.Value.(any))
+			args[i] = v.Value.(any)
 		} else {
-			args = append(args, nil)
+			args[i] = nil
 		}
 	}
-	return args
 }
 
 type wrapTx struct {

testsetup/generate_certs.go

@@ -161,7 +161,6 @@ func writeEncryptedPrivateKey(path string, privateKey *rsa.PrivateKey, password
 	}
 
 	return nil
-
 }
 
 func writeCertificate(path string, certBytes []byte) error {

tracelog/tracelog.go

@@ -104,7 +104,7 @@ func logQueryArgs(args []any) []any {
 			}
 		case string:
 			if len(v) > 64 {
-				var l = 0
+				l := 0
 				for w := 0; l < 64; l += w {
 					_, w = utf8.DecodeRuneInString(v[l:])
 				}

tracelog/tracelog_test.go

@@ -362,7 +362,6 @@ func TestLogBatchStatementsOnExec(t *testing.T) {
 		assert.Equal(t, "BatchQuery", logger.logs[1].msg)
 		assert.Equal(t, "drop table foo", logger.logs[1].data["sql"])
 		assert.Equal(t, "BatchClose", logger.logs[2].msg)
-
 	})
 }
 

values_test.go

@@ -117,7 +117,6 @@ func TestJSONAndJSONBTranscodeExtendedOnly(t *testing.T) {
 		testJSONInt16ArrayFailureDueToOverflow(t, conn, typename)
 		testJSONStruct(t, conn, typename)
 	}
-
 }
 
 func testJSONString(t testing.TB, conn *pgx.Conn, typename string) {
@@ -597,7 +596,9 @@ func TestArrayDecoding(t *testing.T) {
 			assert func(testing.TB, any, any)
 		}{
 			{
-				"select $1::bool[]", []bool{true, false, true}, &[]bool{},
+				"select $1::bool[]",
+				[]bool{true, false, true},
+				&[]bool{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]bool))) {
 						t.Errorf("failed to encode bool[]")
@@ -605,7 +606,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::smallint[]", []int16{2, 4, 484, 32767}, &[]int16{},
+				"select $1::smallint[]",
+				[]int16{2, 4, 484, 32767},
+				&[]int16{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]int16))) {
 						t.Errorf("failed to encode smallint[]")
@@ -613,7 +616,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::smallint[]", []uint16{2, 4, 484, 32767}, &[]uint16{},
+				"select $1::smallint[]",
+				[]uint16{2, 4, 484, 32767},
+				&[]uint16{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]uint16))) {
 						t.Errorf("failed to encode smallint[]")
@@ -621,7 +626,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::int[]", []int32{2, 4, 484}, &[]int32{},
+				"select $1::int[]",
+				[]int32{2, 4, 484},
+				&[]int32{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]int32))) {
 						t.Errorf("failed to encode int[]")
@@ -629,7 +636,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::int[]", []uint32{2, 4, 484, 2147483647}, &[]uint32{},
+				"select $1::int[]",
+				[]uint32{2, 4, 484, 2147483647},
+				&[]uint32{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]uint32))) {
 						t.Errorf("failed to encode int[]")
@@ -637,7 +646,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::bigint[]", []int64{2, 4, 484, 9223372036854775807}, &[]int64{},
+				"select $1::bigint[]",
+				[]int64{2, 4, 484, 9223372036854775807},
+				&[]int64{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]int64))) {
 						t.Errorf("failed to encode bigint[]")
@@ -645,7 +656,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::bigint[]", []uint64{2, 4, 484, 9223372036854775807}, &[]uint64{},
+				"select $1::bigint[]",
+				[]uint64{2, 4, 484, 9223372036854775807},
+				&[]uint64{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]uint64))) {
 						t.Errorf("failed to encode bigint[]")
@@ -653,7 +666,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::text[]", []string{"it's", "over", "9000!"}, &[]string{},
+				"select $1::text[]",
+				[]string{"it's", "over", "9000!"},
+				&[]string{},
 				func(t testing.TB, query, scan any) {
 					if !reflect.DeepEqual(query, *(scan.(*[]string))) {
 						t.Errorf("failed to encode text[]")
@@ -661,7 +676,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::timestamptz[]", []time.Time{time.Unix(323232, 0), time.Unix(3239949334, 00)}, &[]time.Time{},
+				"select $1::timestamptz[]",
+				[]time.Time{time.Unix(323232, 0), time.Unix(3239949334, 0o0)},
+				&[]time.Time{},
 				func(t testing.TB, query, scan any) {
 					queryTimeSlice := query.([]time.Time)
 					scanTimeSlice := *(scan.(*[]time.Time))
@@ -672,7 +689,9 @@ func TestArrayDecoding(t *testing.T) {
 				},
 			},
 			{
-				"select $1::bytea[]", [][]byte{{0, 1, 2, 3}, {4, 5, 6, 7}}, &[][]byte{},
+				"select $1::bytea[]",
+				[][]byte{{0, 1, 2, 3}, {4, 5, 6, 7}},
+				&[][]byte{},
 				func(t testing.TB, query, scan any) {
 					queryBytesSliceSlice := query.([][]byte)
 					scanBytesSliceSlice := *(scan.(*[][]byte))