Führen Sie den auskommentierten Abschnitt einmal aus, füllen Sie die Tabelle _TruncateList mit den Tabellen, die abgeschnitten werden sollen, und führen Sie dann den Rest des Skripts aus. Die _ScriptLog-Tabelle muss im Laufe der Zeit bereinigt werden, wenn Sie dies häufig tun.
Sie können dies ändern, wenn Sie alle Tabellen erstellen möchten. Geben Sie einfach den Namen SELECT in #TruncateList FROM sys.tables ein. Normalerweise möchten Sie jedoch nicht alle ausführen.
Dies wirkt sich auch auf alle Fremdschlüssel in der Datenbank aus, und Sie können dies auch ändern, wenn es für Ihre Anwendung zu stumpf ist. Es ist nicht für meine Zwecke.
/*
CREATE TABLE _ScriptLog
(
ID Int NOT NULL Identity(1,1)
, DateAdded DateTime2 NOT NULL DEFAULT GetDate()
, Script NVarChar(4000) NOT NULL
)
CREATE UNIQUE CLUSTERED INDEX IX_ScriptLog_DateAdded_ID_U_C ON _ScriptLog
(
DateAdded
, ID
)
CREATE TABLE _TruncateList
(
TableName SysName PRIMARY KEY
)
*/
IF OBJECT_ID('TempDB..#DropFK') IS NOT NULL BEGIN
DROP TABLE #DropFK
END
IF OBJECT_ID('TempDB..#TruncateList') IS NOT NULL BEGIN
DROP TABLE #TruncateList
END
IF OBJECT_ID('TempDB..#CreateFK') IS NOT NULL BEGIN
DROP TABLE #CreateFK
END
SELECT Scripts = 'ALTER TABLE ' + '[' + OBJECT_NAME(f.parent_object_id)+ ']'+
' DROP CONSTRAINT ' + '[' + f.name + ']'
INTO #DropFK
FROM .sys.foreign_keys AS f
INNER JOIN .sys.foreign_key_columns AS fc
ON f.OBJECT_ID = fc.constraint_object_id
SELECT TableName
INTO #TruncateList
FROM _TruncateList
SELECT Scripts = 'ALTER TABLE ' + const.parent_obj + '
ADD CONSTRAINT ' + const.const_name + ' FOREIGN KEY (
' + const.parent_col_csv + '
) REFERENCES ' + const.ref_obj + '(' + const.ref_col_csv + ')
'
INTO #CreateFK
FROM (
SELECT QUOTENAME(fk.NAME) AS [const_name]
,QUOTENAME(schParent.NAME) + '.' + QUOTENAME(OBJECT_name(fkc.parent_object_id)) AS [parent_obj]
,STUFF((
SELECT ',' + QUOTENAME(COL_NAME(fcP.parent_object_id, fcp.parent_column_id))
FROM sys.foreign_key_columns AS fcP
WHERE fcp.constraint_object_id = fk.object_id
FOR XML path('')
), 1, 1, '') AS [parent_col_csv]
,QUOTENAME(schRef.NAME) + '.' + QUOTENAME(OBJECT_NAME(fkc.referenced_object_id)) AS [ref_obj]
,STUFF((
SELECT ',' + QUOTENAME(COL_NAME(fcR.referenced_object_id, fcR.referenced_column_id))
FROM sys.foreign_key_columns AS fcR
WHERE fcR.constraint_object_id = fk.object_id
FOR XML path('')
), 1, 1, '') AS [ref_col_csv]
FROM sys.foreign_key_columns AS fkc
INNER JOIN sys.foreign_keys AS fk ON fk.object_id = fkc.constraint_object_id
INNER JOIN sys.objects AS oParent ON oParent.object_id = fkc.parent_object_id
INNER JOIN sys.schemas AS schParent ON schParent.schema_id = oParent.schema_id
INNER JOIN sys.objects AS oRef ON oRef.object_id = fkc.referenced_object_id
INNER JOIN sys.schemas AS schRef ON schRef.schema_id = oRef.schema_id
GROUP BY fkc.parent_object_id
,fkc.referenced_object_id
,fk.NAME
,fk.object_id
,schParent.NAME
,schRef.NAME
) AS const
ORDER BY const.const_name
INSERT INTO _ScriptLog (Script)
SELECT Scripts
FROM #CreateFK
DECLARE @Cmd NVarChar(4000)
, @TableName SysName
WHILE 0 < (SELECT Count(1) FROM #DropFK) BEGIN
SELECT TOP 1 @Cmd = Scripts
FROM #DropFK
EXEC (@Cmd)
DELETE #DropFK WHERE Scripts = @Cmd
END
WHILE 0 < (SELECT Count(1) FROM #TruncateList) BEGIN
SELECT TOP 1 @Cmd = N'TRUNCATE TABLE ' + TableName
, @TableName = TableName
FROM #TruncateList
EXEC (@Cmd)
DELETE #TruncateList WHERE TableName = @TableName
END
WHILE 0 < (SELECT Count(1) FROM #CreateFK) BEGIN
SELECT TOP 1 @Cmd = Scripts
FROM #CreateFK
EXEC (@Cmd)
DELETE #CreateFK WHERE Scripts = @Cmd
END
