Can I loop create Triggers for all tables? - sql-server

Question

I have such script which in theory allows me to create the same Trigger for each table in DB:
DECLARE #insertTriggers VARCHAR(MAX) = '';
SELECT #insertTriggers = #insertTriggers1 + *Some Trigger creation code ending with 'GO'"
FROM INFORMATION_SCHEMA.TABLES
EXEC(#insertTriggers);
When I use PRINT and copy it to different query it works because I can seperate CREATE TRIGGERS with keyword GO. Here it doesn't work. What can I do? Do I have to make a seperate code for each Trigger?

Answer 1

You can use this as template to create your triggers..
DECLARE #TriggerTemplate NVARCHAR(MAX)
DECLARE #TriggerNameTemplate NVARCHAR(250)
DECLARE #Tables TABLE (ID INT IDENTITY, TableName VARCHAR(100))
INSERT #Tables
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.Tables WHERE TABLE_TYPE = 'BASE TABLE'
DECLARE #ID INT, #TableName VARCHAR(100)
DECLARE #SQL NVARCHAR(MAX), #TriggerName NVARCHAR(250)
WHILE EXISTS (SELECT 1 FROM #Tables)
BEGIN
SELECT TOP 1 #ID = ID, #TableName = TableName FROM #Tables
SET #TriggerName = REPLACE(#TriggerNameTemplate,'#TableName#', QUOTENAME(#TableName))
IF EXISTS(SELECT * FROM sys.triggers WHERE name = #TriggerName)
BEGIN
SET #SQL = 'DROP TRIGGER ' + #TriggerName
EXEC (#SQL)
END
SET #SQL = REPLACE(#TriggerTemplate,'#TableName#', QUOTENAME(#TableName))
EXEC(#SQL)
DELETE #Tables WHERE ID = #ID
END

Answer 2

As per my comment, I developed this SP for audit purposes and it might not work for you originally, but if you alter it, I'm sure it'll assist you.
Otherwise, alter your question of what you need the triggers to do and I will then alter my answer to work for you...
if exists(select 1 from sysobjects where name = 'kv_sp_dbAudits_tr_AW')
drop procedure kv_sp_dbAudits_tr_AW
go
set ansi_nulls on
go
set quoted_identifier on
go
create procedure kv_sp_dbAudits_tr_AW(#tablename varchar(150),#switch bit)
as
BEGIN
if exists(select name from sysobjects where name = 'TempTableTriggers')
drop table TempTableTriggers;
create table TempTableTriggers (tablename varchar(100),columns varchar(max),columnvars varchar(max),columnvarst varchar(max),columnalloc varchar(max))
declare #query varchar(max)
, #loop int
, #dbname varchar(50) = (select db_name())+'_Audit'
, #table varchar(100)
, #tableau varchar(100)
, #trigger varchar(100)
, #column varchar(max)
, #columnvars varchar(max)
, #columnvarst varchar(max)
, #columnalloc varchar(max)
, #crlf char(2) = char(13)+char(10)
declare #Tables table
( id int identity primary key
, TableName varchar(100)
, TriggerName varchar(100)
, Columns varchar(max))
if #tablename like ''+'%'+''
set #tablename = #tablename
else
set #tablename = ''+#tablename+''
set #trigger = #tablename+'_Audit_kvtr_AW'
begin
if #switch = 1
begin
if exists(select name from sysobjects where name = #trigger)
begin
set #tablename = (select name from sysobjects where name = #tablename)
set #query = #crlf
set #query = #query + #crlf
set #query = #query + #crlf
set #query = #query + #crlf
set #query = #query + replicate('-',80)+#crlf
set #query = #query + #crlf
set #query = #query + 'The audit trigger "'+#tablename+'_Audit_kvtr_AW'+'" already exists!'
print (#query)
end
else
begin
if #tablename = 'all'
insert into #Tables
( TableName )
select
name
from sysobjects
where xtype = 'u'
and name not like '%audit%'
and name <> 'TempTableTriggers'
order by name
else
insert into #Tables
( TableName )
select
name
from sysobjects
where xtype = 'u'
and name not like '%audit%'
and name <> 'TempTableTriggers'
and name = #tablename
order by name
select #loop = min(id) from #Tables
while #loop is not null
begin
begin
set #query = ' declare #columns varchar(max)
select #columns = stuff((select '','' + char(10)+quotename(Column_Name)
from information_schema.columns
where table_name = '''+(select TableName from #Tables where id = #loop)+'''
and Column_Name <> ''cAllocs''
and data_type not in (''text'',''image'',''ntext'')
group by column_name, data_type, character_maximum_length, ordinal_position
order by ordinal_position
for xml path(''''), type).value(''.'', ''nvarchar(max)''),1,1,'''')
insert into TempTableTriggers (tablename,columns)
select distinct
table_name
, #columns
from information_schema.columns
where table_name = '''+(select TableName from #Tables where id = #loop)+''''
exec (#query)
end
select #loop = min(id) from #Tables where id>#loop
end
insert into #Tables
(TriggerName,TableName,Columns)
select
TableName,TableName,columns
from TempTableTriggers
select #loop = min(id) from #Tables
while #loop is not null
begin
begin
select #trigger = TriggerName+'_Audit_kvtr_AW'
, #tableau = TableName+'_Audit'
, #table = TableName
, #column = Columns
from #Tables
where id = #loop
set #query = 'create trigger '+#trigger+' on '+#table+#crlf
set #query = #query+ 'with encryption'+#crlf
set #query = #query+ 'after insert, update, delete'+#crlf
set #query = #query+ 'as'+#crlf
set #query = #query+ '/***********************************************************************************************************************************'+#crlf
set #query = #query+ 'Description : To insert any change made in '+#table+' into '+#dbname+'.dbo.'+#table+'_Audit'+#crlf
set #query = #query+ 'Author : Attie Wagner'+#crlf
set #query = #query+ 'Creation Date : 30 October 2018'+#crlf
set #query = #query+ 'Modified By : Attie Wagner'+#crlf
set #query = #query+ 'Modified Date : 28 January 2019'+#crlf
set #query = #query+ '************************************************************************************************************************************/'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'begin'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'set nocount on'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'if (select trigger_nestlevel(object_id('''+#trigger+'''))) > 1'+#crlf
set #query = #query+ 'return'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'declare #inserted varchar(15) = '''''+#crlf
set #query = #query+ 'declare #deleted varchar(15) = '''''+#crlf
set #query = #query+ 'declare #updated varchar(15) = '''''+#crlf
set #query = #query+ 'declare #action varchar(15) = '''''+#crlf
set #query = #query+ 'if((exists(select * from inserted)) and (exists(select * from deleted)))'+#crlf
set #query = #query+ ' set #updated = ''updated'''+#crlf
set #query = #query+ 'else'+#crlf
set #query = #query+ 'if(exists(select * from inserted))'+#crlf
set #query = #query+ ' set #inserted = ''new'''+#crlf
set #query = #query+ 'else'+#crlf
set #query = #query+ 'if(exists(select * from deleted))'+#crlf
set #query = #query+ ' set #deleted = ''deleted'''+#crlf
set #query = #query+ 'set #action = (select case when #inserted = ''new'' then ''new'' when #updated = ''updated'' then ''updated'' when #deleted = ''deleted'' then ''deleted'' else '''' end)'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'declare #kvAgent varchar(100) = (select cAgentName from _rtblAgents where idAgents = [dbo]._efnAgentIDFromConnection(''dbo''))'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'if #action in (''new'',''updated'')'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'begin'+#crlf
set #query = #query+ 'insert into ['+#dbname+'].dbo.'+#tableau+' ('+#column+','+#crlf+'kvUsername,'+#crlf+'kvDTStamp,'+#crlf+'kvAction)'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'select '+#column+','+#crlf+'#kvAgent,'+#crlf+'getdate(),'+#crlf+'#action'+#crlf
set #query = #query+ 'from inserted'+#crlf
set #query = #query+ 'end;'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'if #action = ''deleted'''+#crlf
set #query = #query+ #crlf
set #query = #query+ 'begin'+#crlf
set #query = #query+ 'insert into ['+#dbname+'].dbo.'+#tableau+' ('+#column+','+#crlf+'kvUsername,'+#crlf+'kvDTStamp,'+#crlf+'kvAction)'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'select '+#column+','+#crlf+'#kvAgent,'+#crlf+'getdate(),'+#crlf+'#action'+#crlf
set #query = #query+ 'from deleted'+#crlf
set #query = #query+ 'end;'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'begin'+#crlf
set #query = #query+ 'delete '+quotename(#dbname)+'.dbo.'+#table+'_Audit'+#crlf
set #query = #query+ 'where datediff(month,kvDTStamp,getdate()) > 12'+#crlf
set #query = #query+ 'end;'+#crlf
set #query = #query+ #crlf
set #query = #query+ 'end;'+#crlf
exec (#query)
end
select #loop = min(id) from #Tables where id>#loop
end
end
drop table TempTableTriggers;
end
else
begin
if #tablename = 'all'
insert into #Tables
( TriggerName )
select name from sysobjects
where xtype = 'tr'
and name like '%_Audit_kvtr_AW'
order by name
else
insert into #Tables
( TriggerName )
select name from sysobjects
where xtype = 'tr'
and name like '%_Audit_kvtr_AW'
and name = #tablename+'_Audit_kvtr_AW'
order by name
select #loop = min(id) from #Tables
while #loop is not null
begin
begin
set #trigger = (select TriggerName from #Tables where id = #loop)
set #query = 'if exists(select name from sysobjects where name = '''+#trigger+''')'+#crlf
set #query = #query+'drop trigger '+#trigger
exec (#query)
end
select #loop = min(id) from #Tables where id>#loop
end
end
end
END;