Represents a single row of data from a query response. Note: The underlying arrays (rawData, columnOffsets, columnLengths) may be shared buffers reused by the connection to avoid memory allocations. They should be processed synchronously (e.g. eagerly deserialized) and not stored for later use, as their contents will be overwritten by subsequent rows unless the row data size exceeded the configured maxCachedRowSize.

EmptyQueryResponseMessage

internal object EmptyQueryResponseMessage : BackendMessage

Response indicating that an empty query string was sent to the backend.

ErrorOrNoticeMessage

internal class ErrorOrNoticeMessage(val fields: Map<Char, String>) : BackendMessage

The fields of an ErrorResponse (Tag 'E') or of a NoticeResponse (Tag 'N').

FieldDescription

internal class FieldDescription(val name: String, val tableOid: Int, val columnAttrNumber: Short, val dataTypeOid: Int, val dataTypeSize: Short, val typeModifier: Int, val formatCode: Short)

The description of a single field (column) as it arrives inside a RowDescription message.

NegotiateProtocolVersionMessage

internal class NegotiateProtocolVersionMessage(val newestMinorVersion: Int, val unrecognizedOptions: List<String>) : BackendMessage

Message sent by the server to negotiate the protocol version. Introduced in PostgreSQL 14 to handle minor version upgrades.

NoDataMessage

internal object NoDataMessage : BackendMessage

Response indicating that a query returned no data.

ParameterStatusMessage

internal class ParameterStatusMessage(val name: String, val value: String) : BackendMessage

Information about connection parameter (Tag 'S').

ParseCompleteMessage

internal object ParseCompleteMessage : BackendMessage

Response indicating that a Parse command has completed successfully.

PortalSuspendedMessage

internal object PortalSuspendedMessage : BackendMessage

Response indicating that portal execution was suspended because the row limit was reached.

ReadyForQueryMessage

internal class ReadyForQueryMessage(val transactionStatus: Char) : BackendMessage

Ready to accept queries (Tag 'Z').

RowDescriptionMessage

internal class RowDescriptionMessage(val fields: List<FieldDescription>) : BackendMessage

Response containing the description of rows returned by a query.