PostgreSQL 8.2.23 Documentation
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# 43.33. `pg_trigger`

The catalog `pg_trigger` stores triggers on tables. See CREATE TRIGGER for more information.

Table 43-33. `pg_trigger` Columns

Name | Type | References | Description
--- | --- | --- | ---
`tgrelid` | `oid` | ``pg_class`.oid` | The table this trigger is on
`tgname` | `name` |  | Trigger name (must be unique among triggers of same table)
`tgfoid` | `oid` | ``pg_proc`.oid` | The function to be called
`tgtype` | `int2` |  | Bit mask identifying trigger conditions
`tgenabled` | `bool` |  | True if trigger is enabled
`tgisconstraint` | `bool` |  | True if trigger implements a referential integrity constraint
`tgconstrname` | `name` |  | Referential integrity constraint name
`tgconstrrelid` | `oid` | ``pg_class`.oid` | The table referenced by an referential integrity 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 agree with the number of triggers found in this table for the given relation.

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