PG_TRIGGER

PG_TRIGGER records trigger information.

**Table 1** PG_TRIGGER columns
Name	Type	Description
oid	oid	Row identifier (hidden attribute, which must be specified)
tgrelid	oid	OID of the table where the trigger is located
tgname	name	Trigger name
tgfoid	oid	Function to be invoked by the trigger
tgtype	smallint	Trigger type
tgenabled	"char"	O: The trigger is triggered in origin or local mode. D: The trigger is disabled. R: The trigger is triggered in replica mode. A: The trigger is always triggered.
tgisinternal	boolean	Internal trigger ID. If the value is true, it indicates an internal trigger.
tgconstrrelid	oid	Table referenced by the integrity constraint
tgconstrindid	oid	Index of the integrity constraint
tgconstraint	oid	OID of the constraint trigger in PG_CONSTRAINT
tgdeferrable	boolean	Whether the constraint trigger is of the DEFERRABLE type
tginitdeferred	boolean	Whether the trigger is of the INITIALLY DEFERRED type
tgnargs	smallint	Number of input parameters of the trigger function
tgattr	int2vector	Column ID specified by the trigger. If no column is specified, an empty array is used.
tgargs	bytea	Parameter transferred to the trigger
tgqual	pg_node_tree	WHEN condition of the trigger (NULL if the WHEN condition does not exist)
tgowner	oid	Trigger owner