如何在存储过程中创建索引?

时间:2013-06-21 19:07:21

标签: sql sql-server stored-procedures

如何在存储过程中创建索引?抱怨

  

Msg 102,Level 15,State 1,Procedure createIndexModifiedOn,Line 12
  'PRIMARY'附近的语法不正确。

ON [PRIMARY]是SQL Server本身在创建新索引并选择Script As New Query时使用的。

如果我删除ON [PRIMARY],则会出现此错误

  

Msg 102,Level 15,State 1,Procedure createIndexModifiedOn,Line 12
  ')'附近的语法不正确。

以下是程序:

create proc [dbo].createIndexModifiedOn
    @table char(256)
as begin
    declare @idx char(256)
    set @idx = 'idx_' + SUBSTRING(@table, 7, len(@table)-1) + '_modified_on';
    IF  EXISTS (SELECT * FROM sys.indexes WHERE object_id = OBJECT_ID(@table) AND name = @idx)
        DROP INDEX [@idx] ON [@table]

    CREATE NONCLUSTERED INDEX [@idx] ON [@table]
    (
        [modified_on] ASC
    ) ON [PRIMARY]
go

这最终成为完整的查询:

create proc [dbo].createIndexModifiedOn
    @table varchar(256)
as 
    declare @idx varchar(256);
    declare @sql nvarchar(999);
    set @idx = 'idx_' + SUBSTRING(@table, 8, len(@table)-8) + '_modified_on';
    set @sql = '
    IF  EXISTS (SELECT * FROM sys.indexes WHERE object_id = OBJECT_ID(''' + @table + ''') AND name = ''' + @idx + ''')
        DROP INDEX [' + @idx + '] ON ' + @table + '

    CREATE NONCLUSTERED INDEX [' + @idx + '] ON ' + @table + '
    (
        [modified_on] ASC
    ) ON [PRIMARY] 
    ';
    print @table + ', ' + @idx;
    BEGIN TRY
        EXEC sp_executesql @sql;
    END TRY
    BEGIN CATCH
        PRINT 'errno: ' + ltrim(str(error_number()))
        PRINT 'errmsg: ' + error_message()
    END CATCH
GO

EXEC sp_MSforeachtable 'exec createIndexModifiedOn "?"'

1 个答案:

答案 0 :(得分:4)

您不能像在CREATE INDEX语句中那样使用变量。为此,您需要生成一个SQL字符串并使用sp_executesql执行它。

手绘示例:

DECLARE @sql NVARCHAR(1024);
SET @sql = 'CREATE NONCLUSTERED INDEX [' + @idx + '] ON [' + @table + ']
(
    [modified_on] ASC
) ON [PRIMARY];';
EXEC sp_executesql @sql;