TRIGGERS table was added in
TRIGGER_NAME: The name of the database in
which the trigger occurs and the trigger name, respectively.
EVENT_MANIPULATION: The trigger event. This
is the type of operation on the associated table for which the
trigger activates. The value is
row was inserted),
'DELETE' (a row was
'UPDATE' (a row was modified).
EVENT_OBJECT_TABLE: As noted in
Section 18.3, “Using Triggers”, every trigger is associated with
exactly one table. These columns indicate the database in
which this table occurs, and the table name, respectively.
ACTION_ORDER: The ordinal position of the
trigger's action within the list of all similar triggers on
the same table. Currently, this value is always
0, because it is not possible to have more
than one trigger with the same
ACTION_TIMING on the same table.
ACTION_STATEMENT: The trigger body; that
is, the statement executed when the trigger activates. This
text uses UTF-8 encoding.
ACTION_ORIENTATION: Always contains the
ACTION_TIMING: Whether the trigger
activates before or after the triggering event. The value is
ACTION_REFERENCE_NEW_ROW: The old and new
column identifiers, respectively. This means that
ACTION_REFERENCE_OLD_ROW always contains
ACTION_REFERENCE_NEW_ROW always contains
SQL_MODE: The SQL mode in effect when the
trigger was created, and under which the trigger executes. For
the permitted values, see Section 5.1.7, “Server SQL Modes”.
DEFINER: The account of the user who
created the trigger, in
format. This column was added in MySQL 5.0.17.
The following columns currently always contain
Example, using the
ins_sum trigger defined in
Section 18.3, “Using Triggers”:
SELECT * FROM INFORMATION_SCHEMA.TRIGGERS->
WHERE TRIGGER_SCHEMA='test' AND TRIGGER_NAME='ins_sum'\G*************************** 1. row *************************** TRIGGER_CATALOG: NULL TRIGGER_SCHEMA: test TRIGGER_NAME: ins_sum EVENT_MANIPULATION: INSERT EVENT_OBJECT_CATALOG: NULL EVENT_OBJECT_SCHEMA: test EVENT_OBJECT_TABLE: account ACTION_ORDER: 0 ACTION_CONDITION: NULL ACTION_STATEMENT: SET @sum = @sum + NEW.amount ACTION_ORIENTATION: ROW ACTION_TIMING: BEFORE ACTION_REFERENCE_OLD_TABLE: NULL ACTION_REFERENCE_NEW_TABLE: NULL ACTION_REFERENCE_OLD_ROW: OLD ACTION_REFERENCE_NEW_ROW: NEW CREATED: NULL SQL_MODE: DEFINER: me@localhost