GBase 8c 数据类型——触发器函数

l pg_get_triggerdef(oid)

描述：获取触发器的定义信息。

参数：待查触发器的OID。

返回值类型：text

示例:

gbase=# select pg_get_triggerdef(oid) from pg_trigger;

                                                                           pg_get_triggerdef

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 CREATE TRIGGER tg1 BEFORE INSERT ON gtest26 FOR EACH STATEMENT EXECUTE PROCEDURE gtest_trigger_func()

 CREATE TRIGGER tg03 AFTER INSERT ON gtest26 FOR EACH ROW WHEN ((new.a IS NOT NULL))EXECUTE PROCEDURE gtest_trigger_func()

(2 rows)

l pg_get_triggerdef(oid, boolean)

描述：获取触发器的定义信息。

参数：待查触发器的OID及是否以pretty方式展示。

仅在创建trigger时指定WHEN条件的情况下，布尔类型参数才生效。

返回值类型：text

示例:

gbase=# select pg_get_triggerdef(oid,true) from pg_trigger;

                                                                           pg_get_triggerdef

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 CREATE TRIGGER tg1 BEFORE INSERT ON gtest26 FOR EACH STATEMENT EXECUTE PROCEDURE gtest_trigger_func()

 CREATE TRIGGER tg03 AFTER INSERT ON gtest26 FOR EACH ROW WHEN (new.a IS NOT NULL) EXECUTE PROCEDURE gtest_trigger_func()

(2 rows)

gbase=# select pg_get_triggerdef(oid,false) from pg_trigger;

pg_get_triggerdef

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 CREATE TRIGGER tg1 BEFORE INSERT ON gtest26 FOR EACH STATEMENT EXECUTE PROCEDURE gtest_trigger_func()

 CREATE TRIGGER tg03 AFTER INSERT ON gtest26 FOR EACH ROW WHEN ((new.a IS NOT NULL)) EXECUTE PROCEDURE gtest_trigger_func()

(2 rows)