Lazily-demarshalled field (column) description
Contents of NoticeResponse or ErrorResponse messages. https://www.postgresql.org/docs/current/static/protocol-error-fields.html
NotificationResponse message received from the backend. https://www.postgresql.org/docs/current/static/sql-notify.html
Generic query result, returned by getQueryResults
Array of rows, returned by the server, wich all share one row description. Simple queries may include multiple SQL statements, each corresponding to row block. In extended query protocol flow, row block is retuned for each "Execute" message.
Structures that describe the schema of query results.