列出SQL Server中的所有索引列（包括过滤的列）

debugcn 发表于 Dev

格里格里姆

如何获取所有索引列，包括过滤后的列？

if object_id('dbo.tTestIndex') is not null
    drop table dbo.tTestIndex;

create table dbo.tTestIndex (a int, b int, c int);

create index X_tTestIndex on dbo.tTestIndex (a) include (b) where c > 0;

select i.name, i.filter_definition, c.name, ic.is_included_column
from sys.indexes i
inner 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('dbo.tTestIndex');

if object_id('dbo.tTestIndex') is not null
    drop table dbo.tTestIndex;

本示例给出了两行而不是三行。

index_name   | filter_definition | column_name | is_included_column
-------------+-------------------+-------------+-------------------
X_tTestIndex | ([c]>(0))         | a           | 0
X_tTestIndex | ([c]>(0))         | b           | 1

加雷斯

您可以使用目录视图sys.sql_expression_dependencies查找过滤器所依赖的列：

SELECT  i.name, i.filter_definition, c.name, is_included_column = 0
FROM    sys.indexes AS i
        INNER JOIN sys.sql_expression_dependencies AS d
            ON d.referencing_id = i.[object_id]
            AND d.referencing_minor_id = i.index_id
            AND d.referencing_class_desc = 'INDEX'
        INNER JOIN sys.columns AS c
            ON c.[object_id] = d.referenced_id
            AND c.column_id = d.referenced_minor_id
WHERE   i.[object_id] = OBJECT_ID(N'dbo.tTestIndex');

然后，您可以将其仅UNION用于原始查询以获取所有列。

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