Created
August 27, 2021 19:27
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SELECT db.[name] AS [DatabaseName] | |
,id.[object_id] AS [ObjectID] | |
,OBJECT_NAME(id.[object_id], db.[database_id]) AS [ObjectName] | |
,id.[statement] AS [FullyQualifiedObjectName] | |
,id.[equality_columns] AS [EqualityColumns] | |
,id.[inequality_columns] AS [InEqualityColumns] | |
,id.[included_columns] AS [IncludedColumns] | |
,gs.[unique_compiles] AS [UniqueCompiles] | |
,gs.[user_seeks] AS [UserSeeks] | |
,gs.[user_scans] AS [UserScans] | |
,gs.[last_user_seek] AS [LastUserSeekTime] | |
,gs.[last_user_scan] AS [LastUserScanTime] | |
,gs.[avg_total_user_cost] AS [AvgTotalUserCost] -- Average cost of the user queries that could be reduced by the index in the group. | |
,gs.[avg_user_impact] AS [AvgUserImpact] -- The value means that the query cost would on average drop by this percentage if this missing index group was implemented. | |
,gs.[system_seeks] AS [SystemSeeks] | |
,gs.[system_scans] AS [SystemScans] | |
,gs.[last_system_seek] AS [LastSystemSeekTime] | |
,gs.[last_system_scan] AS [LastSystemScanTime] | |
,gs.[avg_total_system_cost] AS [AvgTotalSystemCost] | |
,gs.[avg_system_impact] AS [AvgSystemImpact] -- Average percentage benefit that system queries could experience if this missing index group was implemented. | |
,gs.[user_seeks] * gs.[avg_total_user_cost] * (gs.[avg_user_impact] * 0.01) AS [IndexAdvantage] | |
,'CREATE INDEX [IX_' + OBJECT_NAME(id.[object_id], db.[database_id]) + '_' + REPLACE(REPLACE(REPLACE(ISNULL(id.[equality_columns], ''), ', ', '_'), '[', ''), ']', '') + CASE | |
WHEN id.[equality_columns] IS NOT NULL | |
AND id.[inequality_columns] IS NOT NULL | |
THEN '_' | |
ELSE '' | |
END + REPLACE(REPLACE(REPLACE(ISNULL(id.[inequality_columns], ''), ', ', '_'), '[', ''), ']', '') + '_' + LEFT(CAST(NEWID() AS [nvarchar](64)), 5) + ']' + ' ON ' + id.[statement] + ' (' + ISNULL(id.[equality_columns], '') + CASE | |
WHEN id.[equality_columns] IS NOT NULL | |
AND id.[inequality_columns] IS NOT NULL | |
THEN ',' | |
ELSE '' | |
END + ISNULL(id.[inequality_columns], '') + ')' + ISNULL(' INCLUDE (' + id.[included_columns] + ')', '') AS [ProposedIndex] | |
,CAST(CURRENT_TIMESTAMP AS [smalldatetime]) AS [CollectionDate] | |
FROM [sys].[dm_db_missing_index_group_stats] gs WITH (NOLOCK) | |
INNER JOIN [sys].[dm_db_missing_index_groups] ig WITH (NOLOCK) ON gs.[group_handle] = ig.[index_group_handle] | |
INNER JOIN [sys].[dm_db_missing_index_details] id WITH (NOLOCK) ON ig.[index_handle] = id.[index_handle] | |
INNER JOIN [sys].[databases] db WITH (NOLOCK) ON db.[database_id] = id.[database_id] | |
WHERE db.[database_id] = DB_ID() | |
--AND OBJECT_NAME(id.[object_id], db.[database_id]) = 'YourTableName' | |
ORDER BY ObjectName, [IndexAdvantage] DESC | |
OPTION (RECOMPILE); |
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