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Dynamic Change Capture
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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