postgresql - PostgreSQL函数中如何使用“RAISE INFO, RAISE LOG， RAISE DEBUG”来跟踪日志？

Question

CREATE OR REPLACE FUNCTION mover(src text, dst text, cpquery text, conname text, ifbin boolean) returns void as
$$
        DECLARE
                cnt integer;
                dlcnt integer;
                del_count integer;
                ret text;

        BEGIN
                SELECT  pg_catalog.dblink_copy_open(conname, dst, ifbin) INTO ret ;
                RAISE LOG 'dblink_open %',ret;

                execute 'SELECT  1 as check FROM ' || src ||' limit 1' into cnt;
                IF cnt=0 THEN
                        PERFORM pg_sleep(2);
                END IF;

                IF ifbin=true THEN
                        RAISE DEBUG 'Start to Copy data with binary';
                        execute 'COPY (' || cpquery || '  ) to function pg_catalog.dblink_copy_write with binary';
                        RAISE DEBUG 'Finish Copy data';
                ELSE
                        RAISE DEBUG 'Start to Copy data without binary';
                        execute 'COPY (' || cpquery || '  ) to function pg_catalog.dblink_copy_write';
                        RAISE DEBUG 'Finish Copy data';
                END IF;

                execute 'DELETE FROM ' || src;

                GET DIAGNOSTICS del_count=ROW_COUNT;
                RAISE INFO 'DELETE % rows',del_count;

                SELECT  pg_catalog.dblink_copy_end() INTO ret;
                RAISE LOG 'dblink_end %',ret;
        END;
$$
language plpgsql;

作为代码，我想通过 using 将一些消息放入日志RAISE，但是我的日志文件的位置在哪里？在哪里RAISE DEBUG输出？

Answer 1

它们可以输出到Postgres日志，报告回客户端，或两者兼而有之。这些由服务器端设置控制，log_min_messages并且client_min_messages.

有关更多详细信息，请参阅以下文档：

http://www.postgresql.org/docs/current/static/plpgsql-errors-and-messages.html

http://www.postgresql.org/docs/current/static/runtime-config-logging.html

正如@a_horse_with_no_name建议的那样：这些参数也可以通过SET客户端的命令进行设置。

可以通过SQL设置：set client_min_messages to 'debug';