Oracle PL / SQL –トリガーの名前変更
この記事では、ALTER TRIGGERを使用してトリガーの名前を変更する方法を示します。
-- rename a trigger ALTER TRIGGER original_name RENAME TO new_name;
1. テーブル+トリガー
電気料金請求書
create table electricity_bill ( bill_id number(5) primary key, amount number(5) ); -- Table ELECTRICITY_BILL created.
trg_rename_example
CREATE OR REPLACE TRIGGER trg_rename_example
BEFORE
UPDATE OR DELETE OR INSERT
ON electricity_bill
FOR EACH ROW
BEGIN
dbms_output.put_line('trg_rename_example Trigger called.');
END;
-- Trigger TRG_RENAME_EXAMPLE compiled
2. トリガーの名前変更の例
2.1 Get all triggers belong to a specified table
SELECT TABLE_NAME,TRIGGER_NAME FROM USER_TRIGGERS WHERE upper(TABLE_NAME) = 'ELECTRICITY_BILL';
| TRIGGER_NAME | 状態 |
|---|---|
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TRG_RENAME_EXAMPLE |
2.2 Rename a trigger.
ALTER TRIGGER trg_rename_example RENAME TO trg_name_updated; -- output -- Trigger TRG_RENAME_EXAMPLE altered.
2.3 Check the trigger name again.
SELECT TABLE_NAME,TRIGGER_NAME FROM USER_TRIGGERS WHERE upper(TABLE_NAME) = 'ELECTRICITY_BILL';
| TRIGGER_NAME | 状態 |
|---|---|
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TRG_NAME_UPDATED |