diff --git a/conn.go b/conn.go
index ca0f0221..48b2f22b 100644
--- a/conn.go
+++ b/conn.go
@@ -155,10 +155,6 @@ func ConnectConfig(ctx context.Context, connConfig *ConnConfig) (*Conn, error) {
 	return connect(ctx, connConfig, minimalConnInfo)
 }
 
-func defaultDialer() *net.Dialer {
-	return &net.Dialer{KeepAlive: 5 * time.Minute}
-}
-
 func connect(ctx context.Context, config *ConnConfig, connInfo *pgtype.ConnInfo) (c *Conn, err error) {
 	c = new(Conn)
 
@@ -561,17 +557,6 @@ func (c *Conn) CauseOfDeath() error {
 	return c.causeOfDeath
 }
 
-// fatalWriteError takes the response of a net.Conn.Write and determines if it is fatal
-func fatalWriteErr(bytesWritten int, err error) bool {
-	// Partial writes break the connection
-	if bytesWritten > 0 {
-		return true
-	}
-
-	netErr, is := err.(net.Error)
-	return !(is && netErr.Timeout())
-}
-
 // Processes messages that are not exclusive to one context such as
 // authentication or query response. The response to these messages is the same
 // regardless of when they occur. It also ignores messages that are only
@@ -615,28 +600,6 @@ func (c *Conn) rxErrorResponse(msg *pgproto3.ErrorResponse) *pgconn.PgError {
 	return err
 }
 
-func (c *Conn) rxRowDescription(msg *pgproto3.RowDescription) []FieldDescription {
-	fields := make([]FieldDescription, len(msg.Fields))
-	for i := 0; i < len(fields); i++ {
-		fields[i].Name = string(msg.Fields[i].Name)
-		fields[i].Table = pgtype.OID(msg.Fields[i].TableOID)
-		fields[i].AttributeNumber = msg.Fields[i].TableAttributeNumber
-		fields[i].DataType = pgtype.OID(msg.Fields[i].DataTypeOID)
-		fields[i].DataTypeSize = msg.Fields[i].DataTypeSize
-		fields[i].Modifier = msg.Fields[i].TypeModifier
-		fields[i].FormatCode = msg.Fields[i].Format
-	}
-	return fields
-}
-
-func (c *Conn) rxParameterDescription(msg *pgproto3.ParameterDescription) []pgtype.OID {
-	parameters := make([]pgtype.OID, len(msg.ParameterOIDs))
-	for i := 0; i < len(parameters); i++ {
-		parameters[i] = pgtype.OID(msg.ParameterOIDs[i])
-	}
-	return parameters
-}
-
 func (c *Conn) die(err error) {
 	c.mux.Lock()
 	defer c.mux.Unlock()
diff --git a/messages.go b/messages.go
index e6496373..dee1eec9 100644
--- a/messages.go
+++ b/messages.go
@@ -78,93 +78,6 @@ func (fd FieldDescription) Type() reflect.Type {
 	}
 }
 
-// appendParse appends a PostgreSQL wire protocol parse message to buf and returns it.
-func appendParse(buf []byte, name string, query string, parameterOIDs []pgtype.OID) []byte {
-	buf = append(buf, 'P')
-	sp := len(buf)
-	buf = pgio.AppendInt32(buf, -1)
-	buf = append(buf, name...)
-	buf = append(buf, 0)
-	buf = append(buf, query...)
-	buf = append(buf, 0)
-
-	buf = pgio.AppendInt16(buf, int16(len(parameterOIDs)))
-	for _, oid := range parameterOIDs {
-		buf = pgio.AppendUint32(buf, uint32(oid))
-	}
-	pgio.SetInt32(buf[sp:], int32(len(buf[sp:])))
-
-	return buf
-}
-
-// appendDescribe appends a PostgreSQL wire protocol describe message to buf and returns it.
-func appendDescribe(buf []byte, objectType byte, name string) []byte {
-	buf = append(buf, 'D')
-	sp := len(buf)
-	buf = pgio.AppendInt32(buf, -1)
-	buf = append(buf, objectType)
-	buf = append(buf, name...)
-	buf = append(buf, 0)
-	pgio.SetInt32(buf[sp:], int32(len(buf[sp:])))
-
-	return buf
-}
-
-// appendSync appends a PostgreSQL wire protocol sync message to buf and returns it.
-func appendSync(buf []byte) []byte {
-	buf = append(buf, 'S')
-	buf = pgio.AppendInt32(buf, 4)
-
-	return buf
-}
-
-// appendBind appends a PostgreSQL wire protocol bind message to buf and returns it.
-func appendBind(
-	buf []byte,
-	destinationPortal,
-	preparedStatement string,
-	connInfo *pgtype.ConnInfo,
-	parameterOIDs []pgtype.OID,
-	arguments []interface{},
-	resultFormatCodes []int16,
-) ([]byte, error) {
-	buf = append(buf, 'B')
-	sp := len(buf)
-	buf = pgio.AppendInt32(buf, -1)
-	buf = append(buf, destinationPortal...)
-	buf = append(buf, 0)
-	buf = append(buf, preparedStatement...)
-	buf = append(buf, 0)
-
-	var err error
-	arguments, err = convertDriverValuers(arguments)
-	if err != nil {
-		return nil, err
-	}
-
-	buf = pgio.AppendInt16(buf, int16(len(parameterOIDs)))
-	for i, oid := range parameterOIDs {
-		buf = pgio.AppendInt16(buf, chooseParameterFormatCode(connInfo, oid, arguments[i]))
-	}
-
-	buf = pgio.AppendInt16(buf, int16(len(arguments)))
-	for i, oid := range parameterOIDs {
-		var err error
-		buf, err = encodePreparedStatementArgument(connInfo, buf, oid, arguments[i])
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	buf = pgio.AppendInt16(buf, int16(len(resultFormatCodes)))
-	for _, fc := range resultFormatCodes {
-		buf = pgio.AppendInt16(buf, fc)
-	}
-	pgio.SetInt32(buf[sp:], int32(len(buf[sp:])))
-
-	return buf, nil
-}
-
 func convertDriverValuers(args []interface{}) ([]interface{}, error) {
 	for i, arg := range args {
 		switch arg := arg.(type) {
@@ -181,21 +94,6 @@ func convertDriverValuers(args []interface{}) ([]interface{}, error) {
 	return args, nil
 }
 
-// appendExecute appends a PostgreSQL wire protocol execute message to buf and returns it.
-func appendExecute(buf []byte, portal string, maxRows uint32) []byte {
-	buf = append(buf, 'E')
-	sp := len(buf)
-	buf = pgio.AppendInt32(buf, -1)
-
-	buf = append(buf, portal...)
-	buf = append(buf, 0)
-	buf = pgio.AppendUint32(buf, maxRows)
-
-	pgio.SetInt32(buf[sp:], int32(len(buf[sp:])))
-
-	return buf
-}
-
 // appendQuery appends a PostgreSQL wire protocol query message to buf and returns it.
 func appendQuery(buf []byte, query string) []byte {
 	buf = append(buf, 'Q')
diff --git a/query.go b/query.go
index d1bb0869..53fb1e72 100644
--- a/query.go
+++ b/query.go
@@ -497,26 +497,6 @@ func (c *Conn) Query(ctx context.Context, sql string, optionsAndArgs ...interfac
 	return rows, rows.err
 }
 
-func (c *Conn) buildOneRoundTripQueryEx(buf []byte, sql string, options *QueryExOptions, arguments []interface{}) ([]byte, error) {
-	if len(arguments) != len(options.ParameterOIDs) {
-		return nil, errors.Errorf("mismatched number of arguments (%d) and options.ParameterOIDs (%d)", len(arguments), len(options.ParameterOIDs))
-	}
-
-	if len(options.ParameterOIDs) > 65535 {
-		return nil, errors.Errorf("Number of QueryExOptions ParameterOIDs must be between 0 and 65535, received %d", len(options.ParameterOIDs))
-	}
-
-	buf = appendParse(buf, "", sql, options.ParameterOIDs)
-	buf = appendDescribe(buf, 'S', "")
-	buf, err := appendBind(buf, "", "", c.ConnInfo, options.ParameterOIDs, arguments, options.ResultFormatCodes)
-	if err != nil {
-		return nil, err
-	}
-	buf = appendExecute(buf, "", 0)
-
-	return buf, nil
-}
-
 func (c *Conn) sanitizeForSimpleQuery(sql string, args ...interface{}) (string, error) {
 	if c.pgConn.ParameterStatus("standard_conforming_strings") != "on" {
 		return "", errors.New("simple protocol queries must be run with standard_conforming_strings=on")