導致觸發的交易的Oracle交易ID

Question

假設我有一個名爲「user」的表。我有一個觸發器插入到「用戶」表中觸發。 有沒有辦法在觸發器內獲取insert的事務ID？

Answer 1

您可以使用該功能dbms_transaction.local_transaction_id

下面是一個例子：（從here拍攝）

SELECT dbms_transaction.local_transaction_id 
FROM dual; 

CREATE TABLE t (
testcol NUMBER(3)); 

INSERT INTO t 
VALUES (1); 

SELECT dbms_transaction.local_transaction_id 
FROM dual; 

CREATE OR REPLACE FUNCTION atf RETURN VARCHAR2 IS 
PRAGMA AUTONOMOUS_TRANSACTION; 
x VARCHAR2(20); 
BEGIN 
    INSERT INTO t 
    (testcol) 
    VALUES 
    (2); 

    x := dbms_transaction.local_transaction_id; 
    COMMIT; 

    RETURN x; 
END atf; 
/

set serveroutput on 

DECLARE 
x VARCHAR2(20); 
BEGIN 
    x := atf; 
    dbms_output.put_line(x); 

    INSERT INTO t VALUES (3); 

    x := dbms_transaction.local_transaction_id; 
    dbms_output.put_line(x); 
    COMMIT; 
END; 
/