Update Exec signature to return the number of affected rows

README.md

@@ -99,7 +99,7 @@ type Provider interface {
 	QueryOne(ctx context.Context, record interface{}, query string, params ...interface{}) error
 	QueryChunks(ctx context.Context, parser ChunkParser) error
 
-	Exec(ctx context.Context, query string, params ...interface{}) error
+	Exec(ctx context.Context, query string, params ...interface{}) (rowsAffected int64, _ error)
 	Transaction(ctx context.Context, fn func(Provider) error) error
 }
 ```
@@ -175,7 +175,7 @@ func main() {
 
 	// In the definition below, please note that BLOB is
 	// the only type we can use in sqlite for storing JSON.
-	err = db.Exec(ctx, `CREATE TABLE IF NOT EXISTS users (
+	_, err = db.Exec(ctx, `CREATE TABLE IF NOT EXISTS users (
 	  id INTEGER PRIMARY KEY,
 		age INTEGER,
 		name TEXT,

contracts.go

@@ -27,7 +27,7 @@ type Provider interface {
 	QueryOne(ctx context.Context, record interface{}, query string, params ...interface{}) error
 	QueryChunks(ctx context.Context, parser ChunkParser) error
 
-	Exec(ctx context.Context, query string, params ...interface{}) error
+	Exec(ctx context.Context, query string, params ...interface{}) (rowsAffected int64, _ error)
 	Transaction(ctx context.Context, fn func(Provider) error) error
 }
 

examples/all_adapters/all_adapters.go

@@ -48,7 +48,7 @@ func main() {
 		if err != nil {
 			log.Fatalf("unable to open database, reason: %s", err)
 		}
-		err = db.Exec(ctx, `CREATE TABLE users (
+		_, err = db.Exec(ctx, `CREATE TABLE users (
 		  id serial PRIMARY KEY,
 			age INT,
 			name VARCHAR(50),
@@ -64,7 +64,7 @@ func main() {
 		if err != nil {
 			log.Fatalf("unable to open database: %s", err)
 		}
-		err = db.Exec(ctx, `CREATE TABLE users (
+		_, err = db.Exec(ctx, `CREATE TABLE users (
 			id INT AUTO_INCREMENT PRIMARY KEY,
 			age INT,
 			name VARCHAR(50),
@@ -83,7 +83,7 @@ func main() {
 
 		// In the example below NVARCHAR is the format
 		// we are using for storing JSON:
-		err = db.Exec(ctx, `CREATE TABLE users (
+		_, err = db.Exec(ctx, `CREATE TABLE users (
 			id INT IDENTITY(1,1) PRIMARY KEY,
 			age INT,
 			name VARCHAR(50),
@@ -102,7 +102,7 @@ func main() {
 
 		// In the definition below, please note that BLOB is
 		// the only type we can use in sqlite for storing JSON.
-		err = db.Exec(ctx, `CREATE TABLE IF NOT EXISTS users (
+		_, err = db.Exec(ctx, `CREATE TABLE IF NOT EXISTS users (
 			id INTEGER PRIMARY KEY,
 			age INTEGER,
 			name TEXT,

examples/crud/crud.go

@@ -59,7 +59,7 @@ func main() {
 
 	// In the definition below, please note that BLOB is
 	// the only type we can use in sqlite for storing JSON.
-	err = db.Exec(ctx, `CREATE TABLE IF NOT EXISTS users (
+	_, err = db.Exec(ctx, `CREATE TABLE IF NOT EXISTS users (
 	  id INTEGER PRIMARY KEY,
 		age INTEGER,
 		name TEXT,

examples/example_service/mocks.go

@@ -50,15 +50,16 @@ func (mr *MockProviderMockRecorder) Delete(ctx, table, idOrRecord interface{}) *
 }
 
 // Exec mocks base method.
-func (m *MockProvider) Exec(ctx context.Context, query string, params ...interface{}) error {
+func (m *MockProvider) Exec(ctx context.Context, query string, params ...interface{}) (int64, error) {
 	m.ctrl.T.Helper()
 	varargs := []interface{}{ctx, query}
 	for _, a := range params {
 		varargs = append(varargs, a)
 	}
 	ret := m.ctrl.Call(m, "Exec", varargs...)
-	ret0, _ := ret[0].(error)
+	ret0, _ := ret[0].(int64)
-	return ret0
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
 }
 
 // Exec indicates an expected call of Exec.

ksql.go

@@ -859,9 +859,10 @@ func buildUpdateQuery(
 }
 
 // Exec just runs an SQL command on the database returning no rows.
-func (c DB) Exec(ctx context.Context, query string, params ...interface{}) error {
+func (c DB) Exec(ctx context.Context, query string, params ...interface{}) (rowsAffected int64, _ error) {
-	_, err := c.db.ExecContext(ctx, query, params...)
+	result, err := c.db.ExecContext(ctx, query, params...)
-	return err
+	rowsAffected, _ = result.RowsAffected()
+	return rowsAffected, err
 }
 
 // Transaction just runs an SQL command on the database returning no rows.

ksql_test.go

@@ -1736,7 +1736,7 @@ func TestTransaction(t *testing.T) {
 					assert.Equal(t, nil, err)
 					err = db.Insert(ctx, UsersTable, &User{Name: "User4"})
 					assert.Equal(t, nil, err)
-					err = db.Exec(ctx, "UPDATE users SET age = 22")
+					_, err = db.Exec(ctx, "UPDATE users SET age = 22")
 					assert.Equal(t, nil, err)
 
 					return errors.New("fake-error")

mocks.go

@@ -17,7 +17,7 @@ type Mock struct {
 	QueryOneFn    func(ctx context.Context, record interface{}, query string, params ...interface{}) error
 	QueryChunksFn func(ctx context.Context, parser ChunkParser) error
 
-	ExecFn        func(ctx context.Context, query string, params ...interface{}) error
+	ExecFn        func(ctx context.Context, query string, params ...interface{}) (rowsAffected int64, _ error)
 	TransactionFn func(ctx context.Context, fn func(db Provider) error) error
 }
 
@@ -127,7 +127,7 @@ func (m Mock) QueryChunks(ctx context.Context, parser ChunkParser) error {
 }
 
 // Exec ...
-func (m Mock) Exec(ctx context.Context, query string, params ...interface{}) error {
+func (m Mock) Exec(ctx context.Context, query string, params ...interface{}) (rowsAffected int64, _ error) {
 	if m.ExecFn == nil {
 		panic(fmt.Errorf("Mock.Exec(ctx, %s, %v) called but the ksql.Mock.ExecFn() is not set", query, params))
 	}