## 37.2. Event Trigger Firing Matrix

Table 37.1, “Event Trigger Support by Command Tag” lists all commands for which event triggers are supported.

Table 37.1. Event Trigger Support by Command Tag

Command Tag | `ddl_command_start` | `ddl_command_end` | `sql_drop` | `table_rewrite` | Notes
--- | --- | --- | --- | --- | ---
`ALTER AGGREGATE` | `X` | `X` | `-` | `-` |
`ALTER COLLATION` | `X` | `X` | `-` | `-` |
`ALTER CONVERSION` | `X` | `X` | `-` | `-` |
`ALTER DOMAIN` | `X` | `X` | `-` | `-` |
`ALTER EXTENSION` | `X` | `X` | `-` | `-` |
`ALTER FOREIGN DATA WRAPPER` | `X` | `X` | `-` | `-` |
`ALTER FOREIGN TABLE` | `X` | `X` | `X` | `-` |
`ALTER FUNCTION` | `X` | `X` | `-` | `-` |
`ALTER LANGUAGE` | `X` | `X` | `-` | `-` |
`ALTER OPERATOR` | `X` | `X` | `-` | `-` |
`ALTER OPERATOR CLASS` | `X` | `X` | `-` | `-` |
`ALTER OPERATOR FAMILY` | `X` | `X` | `-` | `-` |
`ALTER POLICY` | `X` | `X` | `-` | `-` |
`ALTER SCHEMA` | `X` | `X` | `-` | `-` |
`ALTER SEQUENCE` | `X` | `X` | `-` | `-` |
`ALTER SERVER` | `X` | `X` | `-` | `-` |
`ALTER TABLE` | `X` | `X` | `X` | `X` |
`ALTER TEXT SEARCH CONFIGURATION` | `X` | `X` | `-` | `-` |
`ALTER TEXT SEARCH DICTIONARY` | `X` | `X` | `-` | `-` |
`ALTER TEXT SEARCH PARSER` | `X` | `X` | `-` | `-` |
`ALTER TEXT SEARCH TEMPLATE` | `X` | `X` | `-` | `-` |
`ALTER TRIGGER` | `X` | `X` | `-` | `-` |
`ALTER TYPE` | `X` | `X` | `-` | `X` |
`ALTER USER MAPPING` | `X` | `X` | `-` | `-` |
`ALTER VIEW` | `X` | `X` | `-` | `-` |
`CREATE AGGREGATE` | `X` | `X` | `-` | `-` |
`COMMENT` | `X` | `X` | `-` | `-` | Only for local objects
`CREATE CAST` | `X` | `X` | `-` | `-` |
`CREATE COLLATION` | `X` | `X` | `-` | `-` |
`CREATE CONVERSION` | `X` | `X` | `-` | `-` |
`CREATE DOMAIN` | `X` | `X` | `-` | `-` |
`CREATE EXTENSION` | `X` | `X` | `-` | `-` |
`CREATE FOREIGN DATA WRAPPER` | `X` | `X` | `-` | `-` |
`CREATE FOREIGN TABLE` | `X` | `X` | `-` | `-` |
`CREATE FUNCTION` | `X` | `X` | `-` | `-` |
`CREATE INDEX` | `X` | `X` | `-` | `-` |
`CREATE LANGUAGE` | `X` | `X` | `-` | `-` |
`CREATE OPERATOR` | `X` | `X` | `-` | `-` |
`CREATE OPERATOR CLASS` | `X` | `X` | `-` | `-` |
`CREATE OPERATOR FAMILY` | `X` | `X` | `-` | `-` |
`CREATE POLICY` | `X` | `X` | `-` | `-` |
`CREATE RULE` | `X` | `X` | `-` | `-` |
`CREATE SCHEMA` | `X` | `X` | `-` | `-` |
`CREATE SEQUENCE` | `X` | `X` | `-` | `-` |
`CREATE SERVER` | `X` | `X` | `-` | `-` |
`CREATE TABLE` | `X` | `X` | `-` | `-` |
`CREATE TABLE AS` | `X` | `X` | `-` | `-` |
`CREATE TEXT SEARCH CONFIGURATION` | `X` | `X` | `-` | `-` |
`CREATE TEXT SEARCH DICTIONARY` | `X` | `X` | `-` | `-` |
`CREATE TEXT SEARCH PARSER` | `X` | `X` | `-` | `-` |
`CREATE TEXT SEARCH TEMPLATE` | `X` | `X` | `-` | `-` |
`CREATE TRIGGER` | `X` | `X` | `-` | `-` |
`CREATE TYPE` | `X` | `X` | `-` | `-` |
`CREATE USER MAPPING` | `X` | `X` | `-` | `-` |
`CREATE VIEW` | `X` | `X` | `-` | `-` |
`DROP AGGREGATE` | `X` | `X` | `X` | `-` |
`DROP CAST` | `X` | `X` | `X` | `-` |
`DROP COLLATION` | `X` | `X` | `X` | `-` |
`DROP CONVERSION` | `X` | `X` | `X` | `-` |
`DROP DOMAIN` | `X` | `X` | `X` | `-` |
`DROP EXTENSION` | `X` | `X` | `X` | `-` |
`DROP FOREIGN DATA WRAPPER` | `X` | `X` | `X` | `-` |
`DROP FOREIGN TABLE` | `X` | `X` | `X` | `-` |
`DROP FUNCTION` | `X` | `X` | `X` | `-` |
`DROP INDEX` | `X` | `X` | `X` | `-` |
`DROP LANGUAGE` | `X` | `X` | `X` | `-` |
`DROP OPERATOR` | `X` | `X` | `X` | `-` |
`DROP OPERATOR CLASS` | `X` | `X` | `X` | `-` |
`DROP OPERATOR FAMILY` | `X` | `X` | `X` | `-` |
`DROP OWNED` | `X` | `X` | `X` | `-` |
`DROP POLICY` | `X` | `X` | `X` | `-` |
`DROP RULE` | `X` | `X` | `X` | `-` |
`DROP SCHEMA` | `X` | `X` | `X` | `-` |
`DROP SEQUENCE` | `X` | `X` | `X` | `-` |
`DROP SERVER` | `X` | `X` | `X` | `-` |
`DROP TABLE` | `X` | `X` | `X` | `-` |
`DROP TEXT SEARCH CONFIGURATION` | `X` | `X` | `X` | `-` |
`DROP TEXT SEARCH DICTIONARY` | `X` | `X` | `X` | `-` |
`DROP TEXT SEARCH PARSER` | `X` | `X` | `X` | `-` |
`DROP TEXT SEARCH TEMPLATE` | `X` | `X` | `X` | `-` |
`DROP TRIGGER` | `X` | `X` | `X` | `-` |
`DROP TYPE` | `X` | `X` | `X` | `-` |
`DROP USER MAPPING` | `X` | `X` | `X` | `-` |
`DROP VIEW` | `X` | `X` | `X` | `-` |
`GRANT` | `X` | `X` | `-` | `-` | Only for local objects
`IMPORT FOREIGN SCHEMA` | `X` | `X` | `-` | `-` |
`REVOKE` | `X` | `X` | `-` | `-` | Only for local objects
`SECURITY LABEL` | `X` | `X` | `-` | `-` | Only for local objects
`SELECT INTO` | `X` | `X` | `-` | `-` |