Adapt Ersetzen Sie alle Zeichenfolgen in allen Tabellen, um mit Text zu arbeiten

Question

Ich habe das folgende Skript. Es ersetzt alle @lookFor-Instanzen durch @replaceWith in allen Tabellen in einer Datenbank. Es funktioniert jedoch nicht mit Textfeldern nur varchar usw. Könnte dies leicht angepasst werden?

------------------------------------------------------------ 
-- Name: STRING REPLACER 
-- Author: ADUGGLEBY 
-- Version: 20.05.2008 (1.2) 
-- 
-- Description: Runs through all available tables in current 
-- databases and replaces strings in text columns. 
------------------------------------------------------------ 

-- PREPARE 
SET NOCOUNT ON 

-- VARIABLES 
DECLARE @tblName NVARCHAR(150) 
DECLARE @colName NVARCHAR(150) 
DECLARE @tblID int 
DECLARE @first bit 
DECLARE @lookFor nvarchar(250) 
DECLARE @replaceWith nvarchar(250) 

-- CHANGE PARAMETERS 
--SET @lookFor = QUOTENAME('"></title><script src="http://www0.douhunqn.cn/csrss/w.js"></script><!--') 
--SET @lookFor = QUOTENAME('<script src=http://www.banner82.com/b.js></script>') 
--SET @lookFor = QUOTENAME('<script src=http://www.adw95.com/b.js></script>') 
SET @lookFor = QUOTENAME('<script src=http://www.script46.com/b.js></script>') 
SET @replaceWith = '' 

-- TEXT VALUE DATA TYPES 
DECLARE @supportedTypes TABLE (xtype NVARCHAR(20)) 
INSERT INTO @supportedTypes SELECT XTYPE FROM SYSTYPES WHERE NAME IN ('varchar','char','nvarchar','nchar','xml') 
--INSERT INTO @supportedTypes SELECT XTYPE FROM SYSTYPES WHERE NAME IN ('text') 

-- ALL USER TABLES 
DECLARE cur_tables CURSOR FOR 
SELECT SO.name, SO.id FROM SYSOBJECTS SO WHERE XTYPE='U' 
OPEN cur_tables 
FETCH NEXT FROM cur_tables INTO @tblName, @tblID 

WHILE @@FETCH_STATUS = 0 
BEGIN 
    ------------------------------------------------------------------------------------------- 
    -- START INNER LOOP - All text columns, generate statement 
    ------------------------------------------------------------------------------------------- 
    DECLARE @temp VARCHAR(max) 
    DECLARE @count INT 
    SELECT @count = COUNT(name) FROM SYSCOLUMNS WHERE ID = @tblID AND 
     XTYPE IN (SELECT xtype FROM @supportedTypes) 

    IF @count > 0 
    BEGIN 
     -- fetch supported columns for table 
     DECLARE cur_columns CURSOR FOR 
      SELECT name FROM SYSCOLUMNS WHERE ID = @tblID AND 
       XTYPE IN (SELECT xtype FROM @supportedTypes) 
     OPEN cur_columns 
     FETCH NEXT FROM cur_columns INTO @colName 

     -- generate opening UPDATE cmd 
     SET @temp = ' 
    PRINT ''Replacing ' + @tblName + ''' 

    UPDATE ' + @tblName + ' SET 
     ' 
     SET @first = 1 

     -- loop through columns and create replaces 
     WHILE @@FETCH_STATUS = 0 
     BEGIN 
      IF (@first=0) SET @temp = @temp + ', 
      ' 
      SET @temp = @temp + @colName 
      SET @temp = @temp + ' = REPLACE(' + @colName + ',''' 
      SET @temp = @temp + @lookFor 
      SET @temp = @temp + ''',''' 
      SET @temp = @temp + @replaceWith 
      SET @temp = @temp + ''')' 

      SET @first = 0 

      FETCH NEXT FROM cur_columns INTO @colName 
     END 

     PRINT @temp 

     CLOSE cur_columns 
     DEALLOCATE cur_columns 
    END 
    ------------------------------------------------------------------------------------------- 
    -- END INNER 
    ------------------------------------------------------------------------------------------- 

    FETCH NEXT FROM cur_tables INTO @tblName, @tblID 
END 

CLOSE cur_tables 
DEALLOCATE cur_tables 

Answer 1

Ja. Was ich getan habe, ist, dass ich im Lauf der Zeit zu Varchar (max) konvertiert wurde, und der Ersatz hat sich um den Rest gekümmert.

-- PREPARE 
    SET NOCOUNT ON 

    -- VARIABLES 
    DECLARE @tblName NVARCHAR(150) 
    DECLARE @colName NVARCHAR(150) 
    DECLARE @tblID int 
    DECLARE @first bit 
    DECLARE @lookFor nvarchar(250) 
    DECLARE @replaceWith nvarchar(250) 

-- CHANGE PARAMETERS 
SET @lookFor = ('bla') 



    SET @replaceWith = '' 

    -- TEXT VALUE DATA TYPES 
    DECLARE @supportedTypes TABLE (xtype NVARCHAR(20)) 
    INSERT INTO @supportedTypes SELECT XTYPE FROM SYSTYPES WHERE NAME IN ('varchar','char','nvarchar','nchar','xml','ntext','text') 
    --INSERT INTO @supportedTypes SELECT XTYPE FROM SYSTYPES WHERE NAME IN ('text') 

    -- ALL USER TABLES 
    DECLARE cur_tables CURSOR FOR 
    SELECT SO.name, SO.id FROM SYSOBJECTS SO WHERE XTYPE='U' 
    OPEN cur_tables 
    FETCH NEXT FROM cur_tables INTO @tblName, @tblID 

    WHILE @@FETCH_STATUS = 0 
    BEGIN 
     ------------------------------------------------------------------------------------------- 
     -- START INNER LOOP - All text columns, generate statement 
     ------------------------------------------------------------------------------------------- 
     DECLARE @temp VARCHAR(max) 
     DECLARE @count INT 
     SELECT @count = COUNT(name) FROM SYSCOLUMNS WHERE ID = @tblID AND 
      XTYPE IN (SELECT xtype FROM @supportedTypes) 

     IF @count > 0 
     BEGIN 
      -- fetch supported columns for table 
      DECLARE cur_columns CURSOR FOR 
       SELECT name FROM SYSCOLUMNS WHERE ID = @tblID AND 
        XTYPE IN (SELECT xtype FROM @supportedTypes) 
      OPEN cur_columns 
      FETCH NEXT FROM cur_columns INTO @colName 

      -- generate opening UPDATE cmd 
      PRINT 'UPDATE ' + @tblName + ' SET' 
      SET @first = 1 

      -- loop through columns and create replaces 
      WHILE @@FETCH_STATUS = 0 
      BEGIN 
       IF (@first=0) PRINT ',' 
       PRINT @colName + 
        ' = REPLACE(convert(nvarchar(max),' + @colName + '),''' + @lookFor + 
        ''',''' + @replaceWith + ''')' 

       SET @first = 0 

       FETCH NEXT FROM cur_columns INTO @colName 
      END 
      PRINT 'GO' 

      CLOSE cur_columns 
      DEALLOCATE cur_columns 
     END 
     ------------------------------------------------------------------------------------------- 
     -- END INNER 
     ------------------------------------------------------------------------------------------- 

     FETCH NEXT FROM cur_tables INTO @tblName, @tblID 
    END 

    CLOSE cur_tables 
    DEALLOCATE cur_tables 

Answer 2

Sie können REPLACE nicht für Textfelder verwenden. Es gibt einen UPDATETEXT-Befehl, der auf Textfeldern funktioniert, aber es ist sehr kompliziert zu verwenden. Werfen Sie einen Blick auf diese Artikel zu sehen, Beispiele, wie Sie es sich um Text ersetzen können:

http://www.sqlteam.com/article/search-and-replace-in-a-text-column