Question

是否有办法从现有桌面生成TVP？我试过这个，https://dba.stackexchange.com/questions/12596/using-tables-as-table-valued-parameters-tvp但是它显示了语法错误？

-- you would pass these two in as parameters of course:
DECLARE
  @TableName SYSNAME = N'LocationTable',
  @TypeName  SYSNAME = N'LocationTypeTable';

DECLARE @sql NVARCHAR(MAX) = N'';

SELECT @sql = @sql + N',' + CHAR(13) + CHAR(10) + CHAR(9) 
    + QUOTENAME(c.name) + ' '
    + s.name + CASE WHEN LOWER(s.name) LIKE '%char' THEN 
        '(' + CONVERT(VARCHAR(12), (c.max_length/
        (CASE LOWER(LEFT(s.name, 1)) WHEN N'n' THEN 2 ELSE 1 END)) + ')' 
        ELSE '' END
        -- need much more conditionals here for other data types
    FROM sys.columns AS c
    INNER JOIN sys.types AS s
    ON c.system_type_id = s.system_type_id
    AND c.user_type_id = s.user_type_id
    WHERE c.[object_id] = OBJECT_ID(@TableName);

SELECT @sql = N'CREATE TYPE ' + @TypeName
    + ' AS TABLE ' + CHAR(13) + CHAR(10) + (' + STUFF(@sql, 1, 1, '')
    + CHAR(13) + CHAR(10) + ');';

PRINT @sql;
-- EXEC sp_executesql @sql;

Answer 1

我已对上面的代码进行了修改。此代码执行但不返回任何值。你到底在找什么？

-- you would pass these two in as parameters of course:
DECLARE
  @TableName SYSNAME 
  Set @TableName = N'LocationTable'
DECLARE  
  @TypeName  SYSNAME 
  Set @TypeName =  N'LocationTypeTable'

DECLARE @sql NVARCHAR(4000) 
SET @sql= N'';

SELECT @sql = N',' + CHAR(13) + CHAR(10) + CHAR(9) 
    + QUOTENAME(c.name) + ' '
    + s.name + CASE WHEN LOWER(s.name) LIKE '%char' THEN 
      --  '(' + 
        CONVERT(VARCHAR(12), (c.max_length/
        (CASE LOWER(LEFT(s.name, 1)) WHEN N'n' THEN 2 ELSE 1 END))) 
       -- + ')' 
        ELSE '' END
        -- need much more conditionals here for other data types
    FROM sys.columns AS c
    INNER JOIN sys.types AS s
    ON c.system_type_id = s.system_type_id
    AND c.user_type_id = s.user_type_id
    WHERE c.[object_id] = OBJECT_ID(@TableName);



SELECT @sql = N'CREATE TYPE ' + @TypeName
    + ' AS TABLE ' + CHAR(13) + CHAR(10) + '(' + STUFF(@sql, 1, 1, '')
    + CHAR(13) + CHAR(10) + ');';

PRINT @sql;
-- EXEC sp_executesql @sql;

从现有表格动态生成TVP？

1 个答案: