CONNECTION_STARTED
CONNECTION_MADE
CONNECTION_AWAITING_RESPONSE
CONNECTION_AUTH_OK
CONNECTION_SSL_STARTUP
CONNECTION_SETENV
CONNECTION_OK
PQPING_OK
PQPING_REJECT
PQPING_NO_RESPONSE
PQPING_NO_ATTEMPT
PGRES_EMPTY_QUERY
PGRES_COMMAND_OK
PGRES_TUPLES_OK
PGRES_COPY_OUT
PGRES_COPY_IN
PGRES_BAD_RESPONSE
PGRES_NONFATAL_ERROR
PGRES_FATAL_ERROR
PGRES_COPY_BOTH
PGRES_SINGLE_TUPLE
PG_DIAG_SEVERITY
PG_DIAG_SQLSTATE
PG_DIAG_MESSAGE_PRIMARY
PG_DIAG_MESSAGE_DETAIL
PG_DIAG_MESSAGE_HINT
PG_DIAG_STATEMENT_POSITION
PG_DIAG_INTERNAL_POSITION
PG_DIAG_INTERNAL_QUERY
PG_DIAG_CONTEXT
PG_DIAG_SCHEMA_NAME
PG_DIAG_TABLE_NAME
PG_DIAG_COLUMN_NAME
PG_DIAG_DATATYPE_NAME
PG_DIAG_CONSTRAINT_NAME
PG_DIAG_SOURCE_FILE
PG_DIAG_SOURCE_LINE
PG_DIAG_SOURCE_FUNCTION