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传递给 pg_result_error_field() 。 严重程度；字段内容是 ERROR 、 FATAL 或 PANIC （在 error 消息中）或 WARNING 、 NOTICE 、 DEBUG 、 INFO 或 LOG （在 notice 消息中），或其中之一的本地化翻译。始终存在。 传递给 pg_result_error_field() 。 This is defined the same as the PG_DIAG_STATEMENT_POSITION field, but it is used when the cursor position refers to an internally generated command rather than the one submitted by the client. The PG_DIAG_INTERNAL_QUERY field will always appear when this field appears. 传递给 pg_result_error_field() 。 An indication of the context in which the error occurred. Presently this includes a call stack traceback of active procedural language functions and internally-generated queries. The trace is one entry per line, most recent first. 传递给 pg_insert() 、 pg_select() 、 pg_update() 和 pg_delete() 。将转义应用于所有参数，而不是在内部调用 pg_convert() 。此选项省略元数据查找。查询可能与 pg_query() 和 pg_send_query() 一样快。