tsql - 从 syscomments 中分离出 JOIN 谓词

Question

为了更好地理解数据库中的所有关系（物理和逻辑），我正在寻找存储过程以提取连接谓词。我有一些我可以使用的东西，但它并不完整。

目标是在结果中有 3 列：

1. 对象名称
2. 第一个连接谓词
3. 第二个连接谓词

4. 连接类型（内、右、左）

   declare @Schema varchar(50),@SearchString   VARCHAR (10)
   
   set @SearchString = 'join';
   
   set  @Schema = 'dbo'
   
   
   declare @TextBuffer table 
   (
   SchemaName varchar(50) NOT NULL,
   ObjectName varchar(100) NOT NULL,
   Occurance int NOT NULL, 
   Txt varchar(4000) NOT NULL,
   Colid int
   )
   
   declare @Occurance table
   (
   SchemaName varchar(50)   NULL,
   ObjectName varchar(100)   NULL,
   Occurance  varchar(500) 
   )
   
   
   
   INSERT INTO @TextBuffer
   
   SELECT   DISTINCT SCHEMA_NAME(o.schema_id),
                     o.name,
                     (LEN(text) - LEN(REPLACE(text, @SearchString, ''))) / LEN(@SearchString),
                     [text],
                     colid
   FROM     syscomments AS c
            INNER JOIN
            sys.objects AS o
            ON c.id = o.[object_id]
            INNER JOIN
            sys.schemas AS s
            ON o.schema_id = s.schema_id
   WHERE    text LIKE '%' + @SearchString + '%'
            AND SCHEMA_NAME(o.schema_id) = @Schema
   ORDER BY colid, 3 DESC;
   
   
   
   DECLARE @Txt varchar(4000), @ObjectName varchar(100), @Occ int, @SchemaName varchar(100)
   
   
   declare @count int, @position int
   set @count = 0
   set @position = 0
   
   DECLARE my_cursor CURSOR FAST_FORWARD FOR 
   
   SELECT Txt,ObjectName, Occurance, SchemaName from @TextBuffer
   OPEN my_cursor
   
   FETCH NEXT FROM my_cursor INTO @Txt,@ObjectName,@Occ,@SchemaName
   
   WHILE @@FETCH_STATUS = 0
   BEGIN
   
       set @count =  @Occ
   
   
       while(@count > 0)
           begin 
   
           set @position =  charindex(@SearchString,@Txt) 
   
           insert into @Occurance select @SchemaName, @ObjectName, cast(substring(@Txt, @position, len(@Txt)) as varchar(500))
   
           set @Txt =  substring(substring(@Txt,len(@SearchString),len(@Txt)), @position, len(@Txt))
   
   
           set @count = @count -1
   
           end
   
   
   
   FETCH NEXT FROM my_cursor INTO @Txt,@ObjectName,@Occ,@SchemaName
   END
   
   CLOSE my_cursor 
   DEALLOCATE my_cursor 
   
   
   select * from @Occurance