x002548's Blog

Not Just a Number - Brett Kaiser
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Generate Triggers for all Tables

Well, I did this originally to generate triggers for all tables in a database to audit data changes, and that is simple enough, just move the entire row from the deleted table to a mirrored audit table.

But someone wanted to track activity on tables, so it's a little more simple.  Here we create one log table, and any time a dml operation occurs, it is written there.

Enjoy

USE Northwind
GO

CREATE TABLE LOG_TABLE (Add_dttm datetime DEFAULT (GetDate()), TABLE_NAME sysname, Activity char(6))
GO

DECLARE @sql varchar(8000), @TABLE_NAME sysname
SET NOCOUNT ON

SELECT @TABLE_NAME = MIN(TABLE_NAME) FROM INFORMATION_SCHEMA.Tables

WHILE @TABLE_NAME IS NOT NULL
  BEGIN
 SELECT @sql = 'CREATE TRIGGER [' + @TABLE_NAME + '_Usage_TR] ON [' + @TABLE_NAME +'] '
  + 'FOR INSERT, UPDATE, DELETE AS '
  + 'IF EXISTS (SELECT * FROM inserted) AND NOT EXISTS (SELECT * FROM deleted) '
  + 'INSERT INTO LOG_TABLE (TABLE_NAME,Activity) SELECT ''' + @TABLE_NAME + ''', ''INSERT''' + ' '
  + 'IF EXISTS (SELECT * FROM inserted) AND EXISTS (SELECT * FROM deleted) '
  + 'INSERT INTO LOG_TABLE (TABLE_NAME,Activity) SELECT ''' + @TABLE_NAME + ''', ''UPDATE''' + ' '
  + 'IF NOT EXISTS (SELECT * FROM inserted) AND EXISTS (SELECT * FROM deleted) '
  + 'INSERT INTO LOG_TABLE (TABLE_NAME,Activity) SELECT ''' + @TABLE_NAME + ''', ''DELETE''' + ' GO'
 SELECT @sql
 EXEC(@sql)
 SELECT @TABLE_NAME = MIN(TABLE_NAME) FROM INFORMATION_SCHEMA.Tables WHERE TABLE_NAME > @TABLE_NAME 
  END
SET NOCOUNT OFF

Print | posted on Wednesday, November 29, 2006 9:49 AM | Filed Under [ Code Generataion ]

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