[英]SQL Server trigger operation with out cursor
I have a scenario where in I have to generate SQL script after every DML operation. 我有一种情况,我必须在每个DML操作之后生成SQL脚本。 We have a trigger that runs after every Insert, Update, Delete.
我们有一个触发器,该触发器在每次插入,更新,删除之后运行。
Primarily it takes data from Inserted/Deleted tables and generates a SQL script for each row and performs an insert in to another table. 首先,它从“插入/删除”表中获取数据,并为每一行生成一个SQL脚本,然后插入到另一个表中。
For example, If we insert 例如,如果我们插入
This trigger is taking almost 4-5 hours for 10,000 rows of 5 columns. 10,000行5列需要花费近4-5个小时。 Columns are
int
, date
and varchar(100)
. 列为
int
, date
和varchar(100)
。
We are trying to replace the trigger. 我们正在尝试替换触发器。 Need suggestions on same.
需要相同的建议。
Set @syncScript = 'Insert Into table('
Declare insertCursor Cursor Local Forward_Only For
Select a, b, c From Inserted
Open insertCursor
Fetch Next From insertCursor Into @a, @b, @c
While (@@Fetch_Status = 0)
Begin
Declare @valuesList varchar(max)
Set @columnList = ''
Set @paramsList = '['
Set @valuesList = ''
Select @columnList = @columnList + 'col6, ', @paramsList = @paramsList + '''' + COALESCE(dbo.ConvertFloatToVarchar(col6), 'NULL') + ''', ', @valuesList = @valuesList + '?, ' From Inserted I Where I.a= @a And I.b= @b And I.c= @c And 1 = 1
Select @columnList = @columnList + 'col5, ', @paramsList = @paramsList + '''' + COALESCE(Convert(varchar(max), col5), 'NULL') + ''', ', @valuesList = @valuesList + '?, ' From Inserted I Where I.a= @a And I.b= @b And I.c= @c And 1 = 1
Select @columnList = @columnList + 'col4, ', @paramsList = @paramsList + '''' + COALESCE(Convert(varchar(max), col4), 'NULL') + ''', ', @valuesList = @valuesList + '?, ' From Inserted I Where I.a= @a And I.b= @b And I.c= @c And 1 = 1
Select @columnList = @columnList + 'col3, ', @paramsList = @paramsList + '''' + COALESCE(Convert(varchar(max), col3), 'NULL') + ''', ', @valuesList = @valuesList + '?, ' From Inserted I Where I.a= @a And I.b= @b And I.c= @c And 1 = 1
Select @columnList = @columnList + 'col2, ', @paramsList = @paramsList + '''' + COALESCE(Convert(varchar(max), col2), 'NULL') + ''', ', @valuesList = @valuesList + '?, ' From Inserted I Where I.a= @a And I.b= @b And I.c= @c And 1 = 1
Select @columnList = @columnList + 'col1, ', @paramsList = @paramsList + '''' + COALESCE(Convert(varchar(max), col1), 'NULL') + ''', ', @valuesList = @valuesList + '?, ' From Inserted I Where I.TraitValueMemberId = @a And I.ValueSetId = @b And I.LanguageCulture = @c And 1 = 1
Set @columnList = SUBSTRING(@columnList, 1, Len(@columnList) - 1) + ') Values ('
Set @valuesList = SUBSTRING(@valuesList, 1, Len(@valuesList) - 1) + ')'
Set @paramsList = @paramsList + ']'
Set @bigScript = (COALESCE(@syncScript, '') + COALESCE(@columnList, '') + COALESCE(@valuesList, ''))
Insert Into Log (CreatedDate, [Message]) Select GetDate(), 'tablename INSERT syncScript = ' + @bigScript +'paramsList = ' + COALESCE(@paramsList, '')
Insert Into [dbo].[LogAudit] (GuidId, Query, Params, TableName, CreatedDate, Operation, UserId)
Values ('00000000-0000-0000-0000-000000000000', @bigScript, @paramsList, @table, GetDate(), @operation, @debugUser)
Fetch Next From insertCursor Into @a, @b, @c
End
Close insertCursor
Deallocate insertCursor
In case of update we join across inserted and deleted tables to generate update script like shown above. 在进行更新的情况下,我们将跨插入和已删除的表联接以生成如上所示的更新脚本。
I resolved the issue using SET Operation rather than Trigger 我使用SET操作而不是触发器解决了该问题
INSERT Into [dbo].[LogAudit] (GuidId, Query, Params, TableName, CreatedDate, Operation, UserId)
SELECT '00000000-0000-0000-0000-000000000000',
'INSERT INTO Table(col6, col5, col4, col3, col2, col1) VALUES (?, ?, ?, ?, ?, ?)',
'[' + '''' + COALESCE(dbo.ConvertFloatToVarchar(col6), 'NULL') + ''',' + '''' + COALESCE(Convert(varchar(max), col5), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col4), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col3), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col2), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col1), 'NULL') + ''', ' + ']', @table, GetDate(), @operation, @debugUser FROM Inserted
-- Insert into Log
Insert Into Log (CreatedDate, [Message]) Select GetDate(), 'MTDE_TraitValueMemberByLanguage_Sync INSERT
syncScript = INSERT Into [dbo].[LogAudit (GuidId, Query, Params, TableName, CreatedDate, Operation, UserId) VALUES VALUES (?, ?, ?, ?, ?, ?)' +
'paramsList = ' + '[' + '''' + COALESCE(dbo.ConvertFloatToVarchar(col6), 'NULL') + ''',' + '''' + COALESCE(Convert(varchar(max), col5), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col4), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col3), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col2), 'NULL') + ''', ' + '''' + COALESCE(Convert(varchar(max), col1), 'NULL') + ''', ' + ']' FROM Inserted
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