根据列名确定索引

Question

是否有任何方法可以将列名与索引所具有的列名相匹配。

例如，假设 index1 使用列名称、年龄、地址，而 index2 使用（在同一个表中）名称、年龄。（全部用于一个特定表）

如果我将名称、年龄和表名传递给存储过程，我应该编写什么查询，它将返回 index2 而不是 index1。

我遇到过许多关于如何列出具有索引和表名的列的示例，例如：

How can we check that table have index or not?

但是在为我的使用编写 sql 查询时仍然遇到问题。

任何帮助将不胜感激，

谢谢

（适用于 Microsoft sql server 2008 - 2012）

这是我写的，它不能正常工作，因此问题

select index1.name,sys.tables.name, Stuff((SELECT ',' + sys.columns.name AS [text()]
FROM
(
     select sys.columns.name
     from sys.columns
     inner join sys.index_columns On sys.index_columns.index_column_id=sys.columns.column_id
     inner join sys.indexes on sys.indexes.index_id=sys.index_columns.index_id 
     where sys.indexes.index_id=index1.index_id
) x
For XML PATH (''), type ).value('(./text())[1]','NVARCHAR(MAX)'),1,1,'') As coLName
from sys.indexes as index1 
inner join sys.tables on sys.tables.object_id=index1.object_id
inner join sys.index_columns On index1.index_id=sys.index_columns.index_id  AND sys.index_columns.object_id = sys.tables.object_id
inner join sys.columns on sys.columns.column_id=sys.index_columns.column_id And sys.columns.object_id=sys.tables.object_id
where sys.tables.name=TABLE_NAME

Answer 1

你可以用CTE试试这个查询

 DECLARE @searchIndex nvarchar(100) = 'name,age',
         @tableName nvarchar(100) = 'your_tableName'
;WITH cte AS
 (
  SELECT i.name AS index_name, c.name      
  FROM sys.indexes i LEFT JOIN sys.index_columns ic ON i.object_id = ic.object_id AND i.index_id = ic.index_id
                     LEFT JOIN sys.columns c ON ic.object_id = c.object_id AND ic.column_id = c.column_id
  WHERE i.object_id = OBJECT_ID(@tableName) AND ic.is_included_column != 1
  ), cte2 AS
 (
  SELECT c2.index_name, 
    STUFF((SELECT ',' + c.name
           FROM cte c
           WHERE c.index_name = c2.index_name
  FOR XML PATH, TYPE).value('.[1]', 'nvarchar(max)'), 1, 1, '') [columns]
  FROM cte c2
  GROUP BY c2.index_name 
  )
  SELECT *
  FROM cte2
  WHERE [columns] = @searchIndex

在第二种情况下，无论顺序指定列和空间

DECLARE @searchIndex nvarchar(100) = '  age, name' ,
        @tableName nvarchar (100) = 'your_tableName'       
;WITH ParsSearchIndex AS
 (
  SELECT SUBSTRING(@searchIndex , 0 , CHARINDEX ( ',' , @searchIndex )) AS val ,
         CAST(STUFF (@searchIndex + ',' , 1, CHARINDEX( ',', @searchIndex), '') AS nvarchar (100 )) AS stval        
  UNION ALL
  SELECT LTRIM(SUBSTRING (stval , 0, CHARINDEX( ',', stval))),
         CAST(STUFF (stval , 1, CHARINDEX( ',' , stval ), '' ) AS nvarchar(100 ))        
  FROM ParsSearchIndex
  WHERE stval != ''
  ), max_ParsSearchIndex AS
 (
  SELECT val, COUNT(*) OVER() AS cnt
  FROM ParsSearchIndex
  WHERE val != ''
  ), cte AS
 (
  SELECT i.name AS index_name, c.name , ic .is_included_column,
         MAX(ic .index_column_id) OVER( PARTITION BY i. index_id) AS maxIndex_column_id
  FROM sys.indexes i LEFT JOIN sys. index_columns ic ON i.object_id = ic.object_id AND i.index_id = ic.index_id
                     LEFT JOIN sys. columns c ON ic.object_id = c.object_id AND ic.column_id = c.column_id
  WHERE i.object_id = OBJECT_ID(@tableName )
  ), cte2 AS
 (
  SELECT c2.index_name , COUNT (*) AS cnt, c2. maxIndex_column_id,
    STUFF((SELECT ',' + c .name
           FROM cte c
           WHERE c .index_name = c2 .index_name        
  FOR XML PATH , TYPE ).value( '.[1]', 'nvarchar(max)'), 1 , 1, '') [columns]
  FROM cte c2
  WHERE c2.is_included_column != 1 AND EXISTS (
                         SELECT 1
                         FROM max_ParsSearchIndex p
                         WHERE c2 .name = p .val AND p .cnt = c2.maxIndex_column_id
                         )
  GROUP BY c2 .index_name, c2. maxIndex_column_id
  )
  SELECT index_name, [columns]
  FROM cte2
  WHERE cnt = maxIndex_column_id

Answer 2

这对我有用。

DECLARE @searchIndex nvarchar(100) = 'age,name',
        @schemeName nvarchar(100) = 'dbo',
        @tableName nvarchar(100) = 'tableName'

SELECT
    name
FROM (SELECT
    indexes.name,
    (SELECT
            c1.name + ','
    FROM sys.schemas s1
    INNER JOIN sys.tables t1
        ON s1.schema_id = t1.schema_id
        AND tables.object_id = t1.object_id
    INNER JOIN sys.columns c1
        ON t1.object_id = c1.object_id
    INNER JOIN sys.indexes i1
        ON t1.object_id = i1.object_id
        AND indexes.index_id = i1.index_id
    INNER JOIN sys.index_columns ic1
        ON t1.object_id = ic1.object_id
        AND i1.index_id = ic1.index_id
        AND c1.column_id = ic1.column_id
    WHERE schemas.schema_id = s1.schema_id
    ORDER BY c1.name
    FOR xml PATH (''))
    AS colName
FROM sys.schemas
INNER JOIN sys.tables
    ON schemas.schema_id = tables.schema_id
    AND tables.name = @tableName
INNER JOIN sys.indexes
    ON tables.object_id = indexes.object_id
WHERE schemas.name = @schemeName) A
WHERE A.colName = @searchIndex + ','