Skrypt SQL, aby zmienić wszystkie klucze obce, aby dodać na Usuń kaskada

Odpowiedź Andomara powyżej jest dobra, ale działa tylko dla jednokolumnowych ograniczeń klucza obcego. Dostosowałem go trochę do ograniczeń wielolumnowych:

create function dbo.fk_columns (@constraint_object_id int)
returns varchar(255)
as begin
declare @r varchar(255)
select @r = coalesce(@r + ',', '') + c.name
from sys.foreign_key_columns fkc
join sys.columns c
  on  fkc.parent_object_id = c.object_id
  and fkc.parent_column_id = c.column_id
where fkc.constraint_object_id = @constraint_object_id
return @r
end

select distinct
  DropStmt = 'ALTER TABLE [' + ForeignKeys.ForeignTableSchema +
      '].[' + ForeignKeys.ForeignTableName +
      '] DROP CONSTRAINT [' + ForeignKeys.ForeignKeyName + '] '
,  CreateStmt = 'ALTER TABLE [' + ForeignKeys.ForeignTableSchema +
  '].[' + ForeignKeys.ForeignTableName +
  '] WITH CHECK ADD CONSTRAINT [' +  ForeignKeys.ForeignKeyName +
  '] FOREIGN KEY(' + dbo.fk_columns(constraint_object_id) + ')' +
  'REFERENCES [' + schema_name(sys.objects.schema_id) + '].[' +
  sys.objects.[name] + '] '
  + ' ON DELETE CASCADE'
 from sys.objects
  inner join sys.columns
    on (sys.columns.[object_id] = sys.objects.[object_id])
  inner join (
select sys.foreign_keys.[name] as ForeignKeyName
 ,schema_name(sys.objects.schema_id) as ForeignTableSchema
 ,sys.objects.[name] as ForeignTableName
 ,sys.columns.[name]  as ForeignTableColumn
 ,sys.foreign_keys.referenced_object_id as referenced_object_id
 ,sys.foreign_key_columns.referenced_column_id as referenced_column_id
 ,sys.foreign_keys.object_id as constraint_object_id
 from sys.foreign_keys
  inner join sys.foreign_key_columns
    on (sys.foreign_key_columns.constraint_object_id
      = sys.foreign_keys.[object_id])
  inner join sys.objects
    on (sys.objects.[object_id]
      = sys.foreign_keys.parent_object_id)
    inner join sys.columns
      on (sys.columns.[object_id]
        = sys.objects.[object_id])
       and (sys.columns.column_id
        = sys.foreign_key_columns.parent_column_id)
-- Uncomment this if you want to include only FKs that already
-- have a cascade constraint.
--       where (delete_referential_action_desc = 'CASCADE' or update_referential_action_desc = 'CASCADE')
) ForeignKeys
on (ForeignKeys.referenced_object_id = sys.objects.[object_id])
 and (ForeignKeys.referenced_column_id = sys.columns.column_id)
 where (sys.objects.[type] = 'U')
  and (sys.objects.[name] not in ('sysdiagrams'))

Możesz również użyć zapytania, aby pomóc usunąć ON DELETE CASCADE z FKs, które go obecnie posiadają.

To nadal nie obsługuje przypadku, gdy kolumny są nazwane różnymi rzeczami w dwóch tabelach - inna funkcja zdefiniowana przez użytkownika musiałaby być zdefiniowana w tym celu.

Więcej rozwiązań zgodnych ze standardami:

;WITH CTE AS 
(
    SELECT  
         KCU1.CONSTRAINT_NAME AS FK_CONSTRAINT_NAME 
        ,KCU1.TABLE_SCHEMA AS FK_SCHEMA_NAME 
        ,KCU1.TABLE_NAME AS FK_TABLE_NAME 
        ,KCU1.COLUMN_NAME AS FK_COLUMN_NAME 
        ,KCU1.ORDINAL_POSITION AS FK_ORDINAL_POSITION 
        ,KCU2.CONSTRAINT_NAME AS REFERENCED_CONSTRAINT_NAME 
        ,KCU2.TABLE_SCHEMA AS REFERENCED_SCHEMA_NAME 
        ,KCU2.TABLE_NAME AS REFERENCED_TABLE_NAME 
        ,KCU2.COLUMN_NAME AS REFERENCED_COLUMN_NAME 
        ,KCU2.ORDINAL_POSITION AS REFERENCED_ORDINAL_POSITION 
    FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS RC 

    INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU1 
        ON KCU1.CONSTRAINT_CATALOG = RC.CONSTRAINT_CATALOG  
        AND KCU1.CONSTRAINT_SCHEMA = RC.CONSTRAINT_SCHEMA 
        AND KCU1.CONSTRAINT_NAME = RC.CONSTRAINT_NAME 

    INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU2 
        ON KCU2.CONSTRAINT_CATALOG = RC.UNIQUE_CONSTRAINT_CATALOG  
        AND KCU2.CONSTRAINT_SCHEMA = RC.UNIQUE_CONSTRAINT_SCHEMA 
        AND KCU2.CONSTRAINT_NAME = RC.UNIQUE_CONSTRAINT_NAME 
        AND KCU2.ORDINAL_POSITION = KCU1.ORDINAL_POSITION 
)


SELECT 
     FK_CONSTRAINT_NAME
    --,FK_SCHEMA_NAME
    --,FK_TABLE_NAME
    --,FK_COLUMN_NAME
    --,FK_ORDINAL_POSITION
    --,REFERENCED_CONSTRAINT_NAME
    --,REFERENCED_SCHEMA_NAME
    --,REFERENCED_TABLE_NAME
    --,REFERENCED_COLUMN_NAME
    --,REFERENCED_ORDINAL_POSITION

    ,
        'ALTER TABLE [' + FK_SCHEMA_NAME + ']' 
        + '.[' + FK_TABLE_NAME + '] ' 
        + 'DROP CONSTRAINT [' + FK_CONSTRAINT_NAME + ']; ' 
    AS DropStmt 

    ,
    'ALTER TABLE [' + FK_SCHEMA_NAME + ']' 
        + '.[' + FK_TABLE_NAME + '] ' + 
        + 'WITH CHECK ADD CONSTRAINT [' +  FK_CONSTRAINT_NAME + '] ' 
        + 'FOREIGN KEY([' + FK_COLUMN_NAME + ']) ' 
        + 'REFERENCES [' + REFERENCED_SCHEMA_NAME + '].[' + REFERENCED_TABLE_NAME + ']([' + REFERENCED_COLUMN_NAME + ']) ON DELETE CASCADE; ' 
    AS CreateStmt 

FROM CTE 

WHERE (1=1) 
/*
AND FK_TABLE_NAME IN 
(
     'T_SYS_Geschossrechte'
    ,'T_SYS_Gebaeuderechte'
    ,'T_SYS_Standortrechte'
)

AND REFERENCED_TABLE_NAME NOT LIKE 'T_AP_Ref_Mandant'
*/

ORDER BY  
     FK_TABLE_NAME
    ,FK_CONSTRAINT_NAME
    ,FK_COLUMN_NAME
    ,FK_ORDINAL_POSITION
    ,REFERENCED_CONSTRAINT_NAME
    ,REFERENCED_TABLE_NAME
    ,REFERENCED_COLUMN_NAME
    ,REFERENCED_ORDINAL_POSITION

Edit:
Rozszerzony dla wielokolumnowych kluczy obcych:

;WITH CTE AS 
( 
  SELECT  
         KCU1.CONSTRAINT_NAME AS FK_CONSTRAINT_NAME 
        ,KCU1.TABLE_SCHEMA AS FK_SCHEMA_NAME 
        ,KCU1.TABLE_NAME AS FK_TABLE_NAME 
        ,KCU1.COLUMN_NAME AS FK_COLUMN_NAME 
        ,KCU1.ORDINAL_POSITION AS FK_ORDINAL_POSITION 
        ,KCU2.CONSTRAINT_NAME AS REFERENCED_CONSTRAINT_NAME 
        ,KCU2.TABLE_SCHEMA AS REFERENCED_SCHEMA_NAME 
        ,KCU2.TABLE_NAME AS REFERENCED_TABLE_NAME 
        ,KCU2.COLUMN_NAME AS REFERENCED_COLUMN_NAME 
        ,KCU2.ORDINAL_POSITION AS REFERENCED_ORDINAL_POSITION 
    FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS RC 

    INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU1 
        ON KCU1.CONSTRAINT_CATALOG = RC.CONSTRAINT_CATALOG  
        AND KCU1.CONSTRAINT_SCHEMA = RC.CONSTRAINT_SCHEMA 
        AND KCU1.CONSTRAINT_NAME = RC.CONSTRAINT_NAME 

    INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU2 
        ON KCU2.CONSTRAINT_CATALOG = RC.UNIQUE_CONSTRAINT_CATALOG  
        AND KCU2.CONSTRAINT_SCHEMA = RC.UNIQUE_CONSTRAINT_SCHEMA 
        AND KCU2.CONSTRAINT_NAME = RC.UNIQUE_CONSTRAINT_NAME 
        AND KCU2.ORDINAL_POSITION = KCU1.ORDINAL_POSITION 
)
SELECT 
     FK_SCHEMA_NAME
    ,FK_TABLE_NAME
    ,FK_CONSTRAINT_NAME 
    --,FK_COLUMN_NAME
    --,REFERENCED_COLUMN_NAME



    ,
    'ALTER TABLE ' + QUOTENAME(FK_SCHEMA_NAME) + '.' + QUOTENAME(FK_TABLE_NAME) + ' ' 
      + 'DROP CONSTRAINT ' + QUOTENAME(FK_CONSTRAINT_NAME) + '; ' 
    AS DropStmt 

    ,
    'ALTER TABLE ' + QUOTENAME(FK_SCHEMA_NAME) + '.' + QUOTENAME(FK_TABLE_NAME) + ' 
    ADD CONSTRAINT ' + QUOTENAME(FK_CONSTRAINT_NAME) + ' 
    FOREIGN KEY('
    + 
        SUBSTRING 
        ( 
            (
                SELECT ', ' + QUOTENAME(FK.FK_COLUMN_NAME) AS [text()] 
                FROM CTE AS FK 
                WHERE FK.FK_CONSTRAINT_NAME = CTE.FK_CONSTRAINT_NAME
                AND FK.FK_SCHEMA_NAME = CTE.FK_SCHEMA_NAME
                AND FK.FK_TABLE_NAME = CTE.FK_TABLE_NAME 
                FOR XML PATH, TYPE 
            ).value('.[1]', 'nvarchar(MAX)')
            ,3, 4000
        ) 
    + ') 
'
    + '    REFERENCES ' + QUOTENAME(REFERENCED_SCHEMA_NAME) + '.' + QUOTENAME(REFERENCED_TABLE_NAME) + '(' 
    + SUBSTRING 
      ( 
          (
              SELECT ', ' + QUOTENAME(Referenced.REFERENCED_COLUMN_NAME) AS [text()] 
              FROM CTE AS Referenced 
              WHERE Referenced.FK_CONSTRAINT_NAME = CTE.FK_CONSTRAINT_NAME
              AND Referenced.REFERENCED_SCHEMA_NAME = CTE.REFERENCED_SCHEMA_NAME
              AND Referenced.REFERENCED_TABLE_NAME = CTE.REFERENCED_TABLE_NAME 
              FOR XML PATH, TYPE 
          ).value('.[1]', 'nvarchar(MAX)')
          , 3, 4000 
      )
    + ') 
    ON DELETE CASCADE 
; ' AS CreateStmt 

FROM CTE 

GROUP BY 
     FK_SCHEMA_NAME
    ,FK_TABLE_NAME
    ,FK_CONSTRAINT_NAME 

    ,REFERENCED_SCHEMA_NAME
    ,REFERENCED_TABLE_NAME

I znacznie prostsza wersja dla PostGreSQL:

;WITH CTE AS 
( 
  SELECT  
         KCU1.CONSTRAINT_NAME AS FK_CONSTRAINT_NAME 
        ,KCU1.TABLE_SCHEMA AS FK_SCHEMA_NAME 
        ,KCU1.TABLE_NAME AS FK_TABLE_NAME 
        ,KCU1.COLUMN_NAME AS FK_COLUMN_NAME 
        ,KCU1.ORDINAL_POSITION AS FK_ORDINAL_POSITION 
        ,KCU2.CONSTRAINT_NAME AS REFERENCED_CONSTRAINT_NAME 
        ,KCU2.TABLE_SCHEMA AS REFERENCED_SCHEMA_NAME 
        ,KCU2.TABLE_NAME AS REFERENCED_TABLE_NAME 
        ,KCU2.COLUMN_NAME AS REFERENCED_COLUMN_NAME 
        ,KCU2.ORDINAL_POSITION AS REFERENCED_ORDINAL_POSITION 
    FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS RC 

    INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU1 
        ON KCU1.CONSTRAINT_CATALOG = RC.CONSTRAINT_CATALOG  
        AND KCU1.CONSTRAINT_SCHEMA = RC.CONSTRAINT_SCHEMA 
        AND KCU1.CONSTRAINT_NAME = RC.CONSTRAINT_NAME 

    INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU2 
        ON KCU2.CONSTRAINT_CATALOG = RC.UNIQUE_CONSTRAINT_CATALOG  
        AND KCU2.CONSTRAINT_SCHEMA = RC.UNIQUE_CONSTRAINT_SCHEMA 
        AND KCU2.CONSTRAINT_NAME = RC.UNIQUE_CONSTRAINT_NAME 
        AND KCU2.ORDINAL_POSITION = KCU1.ORDINAL_POSITION 
)
SELECT 
     FK_SCHEMA_NAME
    ,FK_TABLE_NAME
    ,FK_CONSTRAINT_NAME 
    --,FK_COLUMN_NAME
    --,REFERENCED_COLUMN_NAME



    ,
    'ALTER TABLE ' || QUOTE_IDENT(FK_SCHEMA_NAME) || '.' || QUOTE_IDENT(FK_TABLE_NAME) || ' ' 
      || 'DROP CONSTRAINT ' || QUOTE_IDENT(FK_CONSTRAINT_NAME) || '; ' 
    AS DropStmt 

    ,
    'ALTER TABLE ' || QUOTE_IDENT(FK_SCHEMA_NAME) || '.' || QUOTE_IDENT(FK_TABLE_NAME) || ' 
    ADD CONSTRAINT ' || QUOTE_IDENT(FK_CONSTRAINT_NAME) || ' 
    FOREIGN KEY(' || string_agg(FK_COLUMN_NAME, ', ') || ') 
'
    || '    REFERENCES ' || QUOTE_IDENT(REFERENCED_SCHEMA_NAME) || '.' || QUOTE_IDENT(REFERENCED_TABLE_NAME) || '(' || string_agg(REFERENCED_COLUMN_NAME, ', ') || ') 
    ON DELETE CASCADE 
; ' AS CreateStmt 

FROM CTE 

GROUP BY 
     FK_SCHEMA_NAME
    ,FK_TABLE_NAME
    ,FK_CONSTRAINT_NAME 

    ,REFERENCED_SCHEMA_NAME
    ,REFERENCED_TABLE_NAME

Będziesz musiał zmienić tabelę, zrzucić ograniczenia i odtworzyć je:

To jest składnia db2. SQLServer powinien być podobny

ALTER TABLE emp DROP CONSTRAINT fk_dept;

ALTER TABLE emp ADD CONSTRAINT fk_dept
FOREIGN KEY(dept_no)
REFERENCES dept(deptno)
ON DELETE CASCADE;

Możesz napisać własne sp, aby odpytywać tabelę systemową o wszystkie klucze obce, upuścić je i odtworzyć. Będziesz musiał użyć dynamicznego sql w sp, aby to zrobić, gdzie można pętli przez fk defn, umieścić je w varchar i dołączyć / edytować kaskadę, a następnie wykonać stmt.

ODPOWIEDŹ od @ Andomar zadziałała dla mnie, ale była trochę ręczna - musisz ją uruchomić, następnie skopiować wyniki i uruchomić je. Musiałem użyć tego jako części mojej automatycznej konfiguracji testu, więc musiałem uruchomić je automatycznie w jednym zapytaniu.

Wymyśliłem następujący sposób, który pobiera wszystkie SQL do uruchomienia w celu modyfikacji ograniczeń klucza obcego, a następnie uruchamia wszystko za jednym razem:

    IF Object_id('tempdb..#queriesForContraints') IS NOT NULL 
      BEGIN 
          DROP TABLE #queriesForContraints
      END 

    DECLARE @ignoreTablesCommaSeparated VARCHAR(1000)

    SELECT 'ALTER TABLE [' 
           + ForeignKeys.foreigntableschema + '].[' 
           + ForeignKeys.foreigntablename 
           + '] DROP CONSTRAINT [' 
           + ForeignKeys.foreignkeyname + ']; ' 
           + 'ALTER TABLE [' 
           + ForeignKeys.foreigntableschema + '].[' 
           + ForeignKeys.foreigntablename 
           + '] WITH CHECK ADD CONSTRAINT [' 
           + ForeignKeys.foreignkeyname 
           + '] FOREIGN KEY([' 
           + ForeignKeys.foreigntablecolumn 
           + ']) REFERENCES [' 
           + Schema_name(sys.objects.schema_id) + '].[' 
           + sys.objects.[name] + ']([' 
           + sys.columns.[name] 
           + ']) ON DELETE CASCADE; ' AS query
    INTO #queriesForContraints
    FROM   sys.objects 
           INNER JOIN sys.columns 
                   ON ( sys.columns.[object_id] = sys.objects.[object_id] ) 
           INNER JOIN (SELECT sys.foreign_keys.[name]                      AS 
                              ForeignKeyName, 
                              Schema_name(sys.objects.schema_id)           AS 
                  ForeignTableSchema, 
                              sys.objects.[name]                           AS 
                  ForeignTableName, 
                              sys.columns.[name]                           AS 
                  ForeignTableColumn, 
                              sys.foreign_keys.referenced_object_id        AS 
                  referenced_object_id, 
                              sys.foreign_key_columns.referenced_column_id AS 
                  referenced_column_id 
                       FROM   sys.foreign_keys 
                              INNER JOIN sys.foreign_key_columns 
                                      ON ( 
                              sys.foreign_key_columns.constraint_object_id = 
                              sys.foreign_keys.[object_id] ) 
                              INNER JOIN sys.objects 
                                      ON ( sys.objects.[object_id] = 
                                         sys.foreign_keys.parent_object_id ) 
                              INNER JOIN sys.columns 
                                      ON ( sys.columns.[object_id] = 
                                           sys.objects.[object_id] ) 
                                         AND ( sys.columns.column_id = 
    sys.foreign_key_columns.parent_column_id )) 
    ForeignKeys 
    ON ( ForeignKeys.referenced_object_id = sys.objects.[object_id] ) 
    AND ( ForeignKeys.referenced_column_id = sys.columns.column_id ) 
    WHERE  ( sys.objects.[type] = 'U' ) 
           AND ( sys.objects.[name] NOT IN ( 
                'sysdiagrams' --add more comma separated table names here if required
            ) ) 

    DECLARE @queryToRun NVARCHAR(MAX)

    SELECT  @queryToRun = STUFF(
            (SELECT query + ''
             FROM #queriesForContraints
             FOR XML PATH (''))
         , 1, 0, '')

    EXEC sp_executesql @statement = @queryToRun

    IF Object_id('tempdb..#queriesForContraints') IS NOT NULL 
      BEGIN 
          DROP TABLE #queriesForContraints
      END 

Utwórz nową procedurę składowaną, gdzie jedynym parametrem jest nazwa tabeli do przetworzenia. W tej procedurze musisz zapętlić sys.foreign_keys i sys.foreign_key_columns aby zbudować właściwą kroplę i utworzyć składnię, wystarczy użyć kursora i kilku wydruków (KISS).

Wywołaj tę procedurę ze składnią:

EXEC sp_msforeachtable 'YourProcedureName ''?'''

I będzie działać dla każdej tabeli. Weź i uruchom wyjście, i gotowe.

Prostym rozwiązaniem, które znalazłem, jest eksport bazy danych do jednego pliku, użyj funkcji wyszukiwania, aby zastąpić wszystkie działania bez kaskady, upuść bazę danych i zaimportuj edytowany plik.

Informacje zmienione w bazie danych pomiędzy eksportem i importem zostaną utracone.