T-SQL從測試移動到動態生產（第2部分）

Question

好吧，自從我以前的post以來，我能夠取得進步！但是，我又遇到了另一個問題：

目標：傳入兩個參數（一個任務和一個主鍵）來生成一個表的列表。獲取列表，然後動態構建插入語句，旨在將數據從生產環境複製到測試環境。換句話說，以編程方式做什麼'編輯TOP 200'呢......但速度更快。

問題（更新）：@tmpInserVars沒有每次迭代更新。第一次輸入代碼時會被設置，並且不會刷新。

迄今：

USE MAINDB 
DECLARE @PK int = 1000, 
@TaskName nvarchar(50) = 'TASK', 
@curTable nvarchar(75), 
@curRow nvarchar(75), 
@tmpStatement nvarchar(500), 
@tmpInsert nvarchar(500) 

RAISERROR('Retrieving Tables',0,1) WITH NOWAIT 
DECLARE TableCursor CURSOR LOCAL FOR 

    SELECT DISTINCT TOP 2 PRMPTTBL.tTable as PromptTable 
     FROM THING1 TK INNER JOIN THING2 SC ON TK.tkNo=SC.tkNo 
       INNER JOIN Component EL on EL.scNo=SC.scNo    
       LEFT OUTER JOIN Field FLD1 on FLD1.cfNo=EL.cfNoPrompt1    
       LEFT OUTER JOIN MyTableTable MTTTBL on MTTTBL.tbNo=FLD1.tbNo 

     WHERE EL.PK=@PK 
       AND (MTTTBL.tTable is not NULL AND MTTTBL.tTable not in('OneTableIDontWant')) 
       AND MTTTBL.tTable not like '%[_]d%' --eliminate any tables that are actually views 
       AND EL.cfNo > 0 
       AND TK.Description like @TaskName 

RAISERROR('Table',0,1) WITH NOWAIT 
OPEN TableCursor 
FETCH NEXT FROM TableCursor INTO @curTable 
WHILE @@FETCH_STATUS = 0 
BEGIN 
    SET @tmpStatement = 'SELECT TOP 5 * FROM [MYCONN].TEST_MYDB.dbo.' + @curTable + ' where PK=' + Cast(@PK as nvarchar(10)) 
    EXEC (@tmpStatement) 
    RAISERROR(N'Table (outside): %s',0,1,@curTable) WITH NOWAIT 

    IF @@ROWCOUNT = 0 
    BEGIN 
     --@tmpInsertVars isn't updating!!! 
     RAISERROR(N'Initial Select: %s',0,1,@tmpStatement) WITH NOWAIT 
     SELECT @tmpInsertVars = COALESCE(@tmpInsertVars + ',','') + COLUMN_NAME 
     FROM PRODDB.INFORMATION_SCHEMA.COLUMNS 
     WHERE TABLE_NAME = @curTable 

     SET @tmpInsertStatement = 'INSERT INTO [MYCONN].TEST_MYDB.dbo.' + @curTable + ' (' + @tmpInsertVars + ')' + 
            ' SELECT TOP 500 ' + @tmpInsertVars + 
            ' FROM TEST_MYDB.' + @curTable + 
            ' WHERE PK=' + Cast(@PK as nvarchar(10)) 

     RAISERROR(N'Insert Statement: %s',0,1,@tmpInsertStatement) WITH NOWAIT 
    END 


    FETCH NEXT FROM TableCursor INTO @curTable 
END 

CLOSE TableCursor 
DEALLOCATE TableCursor 

Answer 1

1. 聲明你@tmpInsertStatement和@tmpInsertVars變量。

2. 復位@tmpInsertVars爲NULL您填充之前它

   USE MAINDB 
   DECLARE @PK int = 1000, 
   @TaskName nvarchar(50) = 'TASK', 
   @curTable nvarchar(75), 
   @curRow nvarchar(75), 
   @tmpStatement nvarchar(500), 
   @tmpInsert nvarchar(500), 
   @tmpInsertStatement nvarchar(500), 
   @tmpInsertVars nvarchar(500) 
   
   RAISERROR('Retrieving Tables',0,1) WITH NOWAIT 
   DECLARE TableCursor CURSOR LOCAL FOR 
   
       SELECT DISTINCT TOP 2 PRMPTTBL.tTable as PromptTable 
        FROM THING1 TK INNER JOIN THING2 SC ON TK.tkNo=SC.tkNo 
          INNER JOIN Component EL on EL.scNo=SC.scNo    
          LEFT OUTER JOIN Field FLD1 on FLD1.cfNo=EL.cfNoPrompt1    
          LEFT OUTER JOIN MyTableTable MTTTBL on MTTTBL.tbNo=FLD1.tbNo 
   
        WHERE EL.PK=@PK 
          AND (MTTTBL.tTable is not NULL AND MTTTBL.tTable not in('OneTableIDontWant')) 
          AND MTTTBL.tTable not like '%[_]d%' --eliminate any tables that are actually views 
          AND EL.cfNo > 0 
          AND TK.Description like @TaskName 
   
   RAISERROR('Table',0,1) WITH NOWAIT 
   OPEN TableCursor 
   FETCH NEXT FROM TableCursor INTO @curTable 
   WHILE @@FETCH_STATUS = 0 
   BEGIN 
       SET @tmpStatement = 'SELECT TOP 5 * FROM [MYCONN].TEST_MYDB.dbo.' + @curTable + ' where PK=' + Cast(@PK as nvarchar(10)) 
       EXEC (@tmpStatement) 
       RAISERROR(N'Table (outside): %s',0,1,@curTable) WITH NOWAIT 
   
       IF @@ROWCOUNT = 0 
       BEGIN 
        --@tmpInsertVars isn't updating!!! 
        SELECT @tmpInsertVars = NULL; -- RESET @tmpInsertVars 
        RAISERROR(N'Initial Select: %s',0,1,@tmpStatement) WITH NOWAIT 
        SELECT @tmpInsertVars = COALESCE(@tmpInsertVars + ',','') + COLUMN_NAME 
        FROM PRODDB.INFORMATION_SCHEMA.COLUMNS 
        WHERE TABLE_NAME = @curTable 
   
        SET @tmpInsertStatement = 'INSERT INTO [MYCONN].TEST_MYDB.dbo.' + @curTable + ' (' + @tmpInsertVars + ')' + 
               ' SELECT TOP 500 ' + @tmpInsertVars + 
               ' FROM TEST_MYDB.' + @curTable + 
               ' WHERE PK=' + Cast(@PK as nvarchar(10)) 
   
        RAISERROR(N'Insert Statement: %s',0,1,@tmpInsertStatement) WITH NOWAIT 
       END 
   
   
       FETCH NEXT FROM TableCursor INTO @curTable 
   END 
   
   CLOSE TableCursor 
   DEALLOCATE TableCursor