SQL 服务器存储过程：等待删除触发器完成，然后再继续该过程

Question

我的存储过程执行了一条删除语句，该语句触发了一个触发器，该触发器无法记录谁删除了该行，但为 changed_by 记录了一个空白。

然后存储过程使用给定的用户名更新 changed_by。

一半时间，下面存储过程的第 2 部分找到触发器的结果，另一半时间，它没有找到触发器的结果，所以没有什么可以更新。

我如何"yield"控制并确保更新的触发器在继续存储过程之前完成？

（在评论中您会看到一些我迄今为止尝试过但没有奏效的方法）

DROP PROCEDURE IF EXISTS dbo.deleteAndUpdateChangedByInAuditTrail
GO

CREATE PROCEDURE dbo.deleteAndUpdateChangedByInAuditTrail 
     (@tableName VARCHAR(100), 
      @pkIDColName VARCHAR(100), 
      @pkIDValue NUMERIC,
      @delUser VARCHAR(100) )
AS
     BEGIN TRANSACTION;
        -- PART 1: DO THE DELETE:
        DECLARE @JUST_BEFORE_DELETION_TIMESTAMP AS DATETIME2;

        SET @JUST_BEFORE_DELETION_TIMESTAMP = CONVERT(varchar, SYSDATETIME(), 121);

        DECLARE @DELETION_TEMPLATE AS VARCHAR(MAX);
        SET @DELETION_TEMPLATE = 'delete from {THE_TABLE_NAME} WHERE {PK_ID_COL_NAME} = {PK_ID_VALUE}';
        SET @DELETION_TEMPLATE = REPLACE(@DELETION_TEMPLATE, '{THE_TABLE_NAME}', @tableName);
        SET @DELETION_TEMPLATE = REPLACE(@DELETION_TEMPLATE, '{PK_ID_COL_NAME}', @pkIDColName);
        SET @DELETION_TEMPLATE = REPLACE(@DELETION_TEMPLATE, '{PK_ID_VALUE}', @pkIDValue);

        --PRINT @DELETION_TEMPLATE
        EXEC (@DELETION_TEMPLATE);

    COMMIT TRANSACTION;

    BEGIN TRANSACTION;
        -- PART 2: UPDATE THE AUDIT_TRAIL:

        DECLARE @TOTAL_NUM_ROWS_UPDATED_WITH_USERNAME AS NUMERIC;
        SET @TOTAL_NUM_ROWS_UPDATED_WITH_USERNAME = 0;

        --DECLARE @TOTAL_TRIES_SO_FAR AS NUMERIC;
        --SET @TOTAL_TRIES_SO_FAR = 0;

        --WHILE @TOTAL_NUM_ROWS_UPDATED_WITH_USERNAME < 1 AND @TOTAL_TRIES_SO_FAR < 5
        --BEGIN  

            --SET @TOTAL_TRIES_SO_FAR = @TOTAL_TRIES_SO_FAR + 1;

            --WAITFOR DELAY '00:00:01.000' -- SEEN IT FAIL FOR 4 SECONDS :(

            DECLARE @UPDATE_AUDIT_TRAIL_TEMPLATE AS VARCHAR(MAX);

            SET @UPDATE_AUDIT_TRAIL_TEMPLATE = 'update AUDIT_TRAIL set changed_by = ''{CHANGED_BY}'' WHERE upper(table_name) = upper(''{THE_TABLE_NAME}'') and table_pk_value = {PK_ID_VALUE} and CONVERT(varchar, changed_at, 121) >= ''{CHANGED_AT}'' ';

            SET @UPDATE_AUDIT_TRAIL_TEMPLATE = REPLACE(@UPDATE_AUDIT_TRAIL_TEMPLATE, '{CHANGED_BY}', @delUser); 
            SET @UPDATE_AUDIT_TRAIL_TEMPLATE = REPLACE(@UPDATE_AUDIT_TRAIL_TEMPLATE, '{THE_TABLE_NAME}', @tableName); 
            SET @UPDATE_AUDIT_TRAIL_TEMPLATE = REPLACE(@UPDATE_AUDIT_TRAIL_TEMPLATE, '{PK_ID_VALUE}', @pkIDValue); 
            SET @UPDATE_AUDIT_TRAIL_TEMPLATE = REPLACE(@UPDATE_AUDIT_TRAIL_TEMPLATE, '{CHANGED_AT}', @JUST_BEFORE_DELETION_TIMESTAMP); 

            --PRINT @UPDATE_AUDIT_TRAIL_TEMPLATE

            EXEC (@UPDATE_AUDIT_TRAIL_TEMPLATE);

            SELECT @TOTAL_NUM_ROWS_UPDATED_WITH_USERNAME = @@ROWCOUNT;

        --END

    COMMIT TRANSACTION;

    RETURN @TOTAL_NUM_ROWS_UPDATED_WITH_USERNAME;
GO

Answer 1

触发器不会异步执行。 DELETE 之后的下一步要等到触发器完成后才会发生。

如果您看到的东西让您有不同的想法，那么还有其他原因。不是因为触发器 "didn't finish".

SQL 服务器存储过程：等待删除触发器完成，然后再继续该过程

SQL Server stored procedure: wait for a delete's trigger to finish before continuing in the procedure

sql-server

audit

triggers

stored-procedures