Ejecutar la sección comentada a cabo una vez, rellenar la tabla _TruncateList con las tablas que desea truncada, a continuación, ejecutar el resto de la secuencia de comandos. La tabla _ScriptLog tendrá que limpiarse con el tiempo si haces esto mucho.
Puede modificar esto si desea hacer todas las tablas, simplemente ponga SELECCIONAR el nombre INTO #TruncateList FROM sys.tables. Sin embargo, generalmente no desea hacerlos todos.
Además, esto afectará a todas las claves externas en la base de datos, y usted puede modificar eso también si es demasiado contundente para su aplicación. No es para mis propósitos.
/*
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
No puede truncar tablas que tienen claves foráneas, por lo que esto solo funcionará si no hay restricciones de clave externa entre tablas (o si se han deshabilitado). – marcj
de acuerdo ... pensé que ya que pidió específicamente truncar las tablas, ya resolvió el problema con las claves externas ... –
@ gulzar- una especie de- publiqué una pregunta separada sobre cómo manejar las FK pero su respuesta se basa en sus propios méritos . –