Help Center/ GaussDB(DWS)/ SQL Syntax Reference/ SQL Syntax Reference (8.1.3.x)/ Functions and Operators/ Trigger Functions
Updated on 2024-09-03 GMT+08:00
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Trigger Functions

pg_get_triggerdef(oid)

Description: Obtains the definition information of a trigger.

Parameter: OID of the trigger to be queried

Return type: text

Example:

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SELECT pg_get_triggerdef(oid) FROM pg_trigger;
                                                  pg_get_triggerdef
----------------------------------------------------------------------------------------------------------------------
 CREATE TRIGGER insert_trigger BEFORE INSERT ON test_trigger_src_tbl FOR EACH ROW EXECUTE PROCEDURE tri_insert_func()
(1 row)

pg_get_triggerdef(oid, boolean)

Description: Obtains the definition information of a trigger.

Parameter: OID of the trigger to be queried and whether it is displayed in pretty mode

Return type: text

The Boolean parameters take effect only when the WHEN condition is specified during trigger creation.

Example:

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SELECT pg_get_triggerdef(oid,true) FROM pg_trigger;
                                                  pg_get_triggerdef
----------------------------------------------------------------------------------------------------------------------
 CREATE TRIGGER insert_trigger BEFORE INSERT ON test_trigger_src_tbl FOR EACH ROW EXECUTE PROCEDURE tri_insert_func()
(1 row)

SELECT pg_get_triggerdef(oid,false) FROM pg_trigger;
                                                  pg_get_triggerdef
----------------------------------------------------------------------------------------------------------------------
 CREATE TRIGGER insert_trigger BEFORE INSERT ON test_trigger_src_tbl FOR EACH ROW EXECUTE PROCEDURE tri_insert_func()
(1 row)
Parent topic: Functions and Operators