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Dynamic Change Capture
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USE Pantheon; | |
GO | |
DROP TABLE IF EXISTS #OutputTableDynamic; | |
GO | |
CREATE TABLE #OutputTableDynamic | |
( | |
GotAnyChangeID int NOT NULL, | |
OldColumn1 int NOT NULL, | |
NewColumn1 int NOT NULL, | |
OldColumn2 char(1) NOT NULL, | |
NewColumn2 char(1) NOT NULL, | |
OldColumn3 date NOT NULL, | |
NewColumn3 date NOT NULL, | |
OldColumn4 bigint NULL, | |
NewColumn4 bigint NULL, | |
OldColumn5 varchar(50) NOT NULL, | |
NewColumn5 varchar(50) NOT NULL, | |
OldColumn6 datetime NULL, | |
NewColumn6 datetime NULL | |
); | |
DECLARE @ChangeLogAsXml xml, | |
@Id int = 1; | |
UPDATE gac | |
SET gac.Column1 = 3, | |
gac.Column2 = 'D', | |
gac.Column6 = GETDATE() | |
OUTPUT inserted.GotAnyChangeID, | |
Deleted.Column1, Inserted.Column1, | |
Deleted.Column2, Inserted.Column2, | |
Deleted.Column3, Inserted.Column3, | |
Deleted.Column4, Inserted.Column4, | |
Deleted.Column5, Inserted.Column5, | |
Deleted.Column6, Inserted.Column6 | |
INTO #OutputTableDynamic | |
FROM dbo.GotAnyChange AS gac | |
WHERE gac.GotAnyChangeID = @Id; | |
DECLARE @DynamicSql nvarchar(MAX), | |
@NewColumns nvarchar(MAX), | |
@OldColumns nvarchar(MAX), | |
@columns nvarchar(MAX); | |
SET @NewColumns = | |
( | |
SELECT STUFF( | |
( | |
SELECT TOP (1024) | |
', CAST(ISNULL(' + QUOTENAME(RIGHT(tc.name, LEN(tc.name))) + ', '''') AS nvarchar(20)) AS ' | |
+ QUOTENAME(RIGHT(tc.name, LEN(tc.name) - 3)) | |
FROM tempdb.sys.tables AS tt | |
INNER JOIN tempdb.sys.columns AS tc | |
ON tt.object_id = tc.object_id | |
WHERE tt.name LIKE '#OutputTableDynamic%' | |
AND tc.name LIKE 'New%' | |
ORDER BY tc.column_id | |
FOR XML PATH('') | |
), 1, 2, '')); | |
SET @OldColumns = | |
( | |
SELECT STUFF( | |
( | |
SELECT TOP (1024) | |
', CAST(ISNULL(' + QUOTENAME(RIGHT(tc.name, LEN(tc.name))) + ', '''') AS nvarchar(20)) AS ' | |
+ QUOTENAME(RIGHT(tc.name, LEN(tc.name) - 3)) | |
FROM tempdb.sys.tables AS tt | |
INNER JOIN tempdb.sys.columns AS tc | |
ON tt.object_id = tc.object_id | |
WHERE tt.name LIKE '#OutputTableDynamic%' | |
AND tc.name LIKE 'Old%' | |
ORDER BY tc.column_id | |
FOR XML PATH('') | |
), 1, 2, '' ) ); | |
SET @columns = | |
(SELECT STUFF( | |
( SELECT TOP (1024) | |
', ' + QUOTENAME(RIGHT(tc.name, LEN(tc.name) - 3)) | |
FROM tempdb.sys.tables AS tt | |
INNER JOIN tempdb.sys.columns AS tc | |
ON tt.object_id = tc.object_id | |
WHERE tt.name LIKE '#OutputTableDynamic%' | |
AND tc.name LIKE 'New%' | |
ORDER BY tc.column_id | |
FOR XML PATH('') | |
), 1, 2, '')); | |
SET @DynamicSql = | |
N'SELECT New.ColumnName AS CN, New.NewValue AS NV, Old.OldValue AS OV FROM (SELECT Unpvt.GotAnyChangeId, Unpvt.ColumnName, Unpvt.NewValue FROM (SELECT [GotAnyChangeId], ' + @NewColumns | |
+ N' FROM #OutputTableDynamic ) AS DataSource UNPIVOT (NewValue FOR ColumnName IN (' + @columns | |
+ N') ) AS Unpvt ) AS New INNER JOIN ( SELECT Unpvt.GotAnyChangeId, Unpvt.ColumnName, Unpvt.OldValue FROM (SELECT [GotAnyChangeId], ' + @OldColumns | |
+ N' FROM #OutputTableDynamic ) AS DataSource UNPIVOT (OldValue FOR ColumnName IN (' + @columns | |
+ N')) AS Unpvt) AS Old ON Old.ColumnName = New.ColumnName AND Old.GotAnyChangeId = New.GotAnyChangeId WHERE New.NewValue != Old.OldValue FOR XML PATH(''Change''), ROOT(''Changes'')'; | |
EXECUTE sp_executesql @DynamicSql; |
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