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，但它不完整。

目标是在结果中包含3列：

对象名称
第一个连接谓词
第二个连接谓词

连接类型（内部，右侧，左侧）

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

从syscomments中隔离JOIN谓词

0 个答案: