This system catalog stores triggers on tables. See under CREATE TRIGGER for more information.
Table 3-20. pg_trigger Columns
| Name | Type | References | Description |
|---|---|---|---|
| tgrelid | oid | pg_class.oid | The table this trigger is on |
| tgname | name | Trigger name (need not be unique) | |
| tgfoid | oid | pg_proc.oid | The function to be called |
| tgtype | int2 | Bitmask identifying trigger conditions | |
| tgenabled | bool | True if trigger is enabled (not presently checked everywhere it should be, so disabling a trigger by setting this false does not work reliably) | |
| tgisconstraint | bool | True if trigger is a RI constraint | |
| tgconstrname | name | RI constraint name | |
| tgconstrrelid | oid | pg_class.oid | The table referenced by an RI constraint |
| tgdeferrable | bool | True if deferrable | |
| tginitdeferred | bool | True if initially deferred | |
| tgnargs | int2 | Number of argument strings passed to trigger function | |
| tgattr | int2vector | Currently unused | |
| tgargs | bytea | Argument strings to pass to trigger, each null-terminated |
Note: pg_class.reltriggers needs to match up with the entries in this table.