December 15, 2011 at 9:10 am
Hi all -
I have a script that im trying to write that includes taking the result of a select stmt, and storing it in a variable. When i execute this (within a trigger), it just returns the select as a string. What I really need it to do is put the results in the variable...
Select @AppUser = 'SELECT TOP 1 UpdatedBy FROM '+ @TableName + ''
Both variables are declared as varchar(128) the result is also a vachar (even though it's a number)
Thanks all!
I want to later call the @AppUser in another part of the code... Full code is here:
USE [DB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER trigger [dbo].[Table01_AuditTrigger] on [dbo].[Table01] for insert, update, delete
as
declare @bit int ,
@field int ,
@maxfield int ,
@char int ,
@fieldname varchar(128) ,
@TableName varchar(128) ,
@PKCols varchar(1000) ,
@sql varchar(2000),
@UpdateDate varchar(21) ,
@UserName varchar(128) ,
@Type char(1) ,
@PKFieldSelect varchar(1000),
@PKValueSelect varchar(1000),
@AppUser varchar(128)
-- pass the table name into the PK check variable
select @TableName = 'Table01'
-- date and user
select @UserName = system_user ,
@UpdateDate = convert(varchar(8), getdate(), 112) + ' ' + convert(varchar(12), getdate(), 114)
-- Action
if exists (select * from inserted)
if exists (select * from deleted)
select @Type = 'U'
else
select @Type = 'I'
else
select @Type = 'D'
-- get list of columns
select * into #ins from inserted
select * into #del from deleted
-- Get primary key columns for full outer join
select @PKCols = coalesce(@PKCols + ' and', ' on') + ' i.' + c.COLUMN_NAME + ' = d.' + c.COLUMN_NAME
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = @TableName
and CONSTRAINT_TYPE = 'PRIMARY KEY'
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME
-- Get primary key fields select for insert
select @PKFieldSelect = coalesce(@PKFieldSelect+'+','') + '''' + COLUMN_NAME + ''''
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = @TableName
and CONSTRAINT_TYPE = 'PRIMARY KEY'
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME
select @PKValueSelect = coalesce(@PKValueSelect+'+','') + 'convert(varchar(100), coalesce(i.' + COLUMN_NAME + ',d.' + COLUMN_NAME + '))'
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = @TableName
and CONSTRAINT_TYPE = 'PRIMARY KEY'
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME
-- make sure there is a key
if @PKCols is null
begin
raiserror('no PK on table %s', 16, -1, @TableName)
return
end
--This will return the top user in the list.
Select @AppUser = 'SELECT TOP 1 UpdatedBy FROM '+ @TableName + ''
--build the code to insert into audit table
select @field = 0, @maxfield = max(ORDINAL_POSITION) from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = @TableName
while @field < @maxfield
begin
select @field = min(ORDINAL_POSITION) from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = @TableName and ORDINAL_POSITION > @field
select @bit = (@field - 1 )% 8 + 1
select @bit = power(2,@bit - 1)
select @char = ((@field - 1) / 8) + 1
if substring(COLUMNS_UPDATED(),@char, 1) & @bit > 0 or @Type in ('I','D')
begin
select @fieldname = COLUMN_NAME from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = @TableName and ORDINAL_POSITION = @field
select @sql = 'insert Audit (Type, TableName, PrimaryKeyField, PrimaryKeyValue, FieldName, OldValue, NewValue, UpdateDate, UserName, AppUser)'
select @sql = @sql + ' select ''' + @Type + ''''
select @sql = @sql + ',''' + @TableName + ''''
select @sql = @sql + ',' + @PKFieldSelect
select @sql = @sql + ',' + @PKValueSelect
select @sql = @sql + ',''' + @fieldname + ''''
select @sql = @sql + ',convert(varchar(1000),d.' + @fieldname + ')'
select @sql = @sql + ',convert(varchar(1000),i.' + @fieldname + ')'
select @sql = @sql + ',''' + @UpdateDate + ''''
select @sql = @sql + ',''' + @UserName + ''''
select @sql = @sql + ',''' + @AppUser + ''''
select @sql = @sql + ' from #ins i full outer join #del d'
select @sql = @sql + @PKCols
select @sql = @sql + ' where i.' + @fieldname + ' <> d.' + @fieldname
select @sql = @sql + ' or (i.' + @fieldname + ' is null and d.' + @fieldname + ' is not null)'
select @sql = @sql + ' or (i.' + @fieldname + ' is not null and d.' + @fieldname + ' is null)'
--This is to keep the table clean...
exec (@sql)
delete from dbo.Audit where fieldname = 'UpdatedBy'
delete from dbo.Audit where fieldname = 'UpdatedDate'
end
end
December 15, 2011 at 9:21 am
I don't think you can use that syntax. You could try sp_executesql with an output parameter.
John
December 15, 2011 at 9:25 am
try it this way:
Select top 1 @AppUser = UpdatedBy FROM '+ @TableName + ''
The probability of survival is inversely proportional to the angle of arrival.
December 15, 2011 at 9:55 am
Hmm.... That didn't work either...... (tap tap on brow...)
Viewing 4 posts - 1 through 3 (of 3 total)
You must be logged in to reply to this topic. Login to reply