Описание
string
pg_last_error ( [resource connection] )
pg_last_error() returns the last error message
for a given connection.
Error messages may be overwritten by internal PostgreSQL (libpq)
function calls. It may not return an appropriate error message if
multiple errors occur inside a PostgreSQL module function.
Use pg_result_error(), pg_result_error_field(),
pg_result_status() and
pg_connection_status() for better error handling.
Замечание:
This function used to be called pg_errormessage().