Created
March 14, 2017 11:20
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DECLARE | |
@schemaname sysname = 'Sales', | |
@tablename sysname ='Orders', | |
@indexid TINYINT = 1; | |
/* Clustered index is always indexid=1 */ | |
DECLARE @objectid INT; | |
SELECT @objectid=OBJECT_ID(CONCAT(QUOTENAME(@schemaname),'.', QUOTENAME(@tablename))); | |
/* Overview of the table properties */ | |
SELECT * | |
FROM sys.tables | |
WHERE object_id=@objectid; | |
/* Overview of the index properties */ | |
SELECT * | |
FROM sys.indexes | |
WHERE object_id=@objectid and index_id=@indexid | |
/* Get size information from sys.dm_db_partition_stats */ | |
/* This will be fast, it's metadata in memory */ | |
/* If the index is partitioned, this will return multiple rows */ | |
SELECT | |
sc.name + N'.' + t.name AS table_name, | |
CASE si.index_id WHEN 0 THEN N'/* No create statement (Heap) */' | |
ELSE | |
CASE is_primary_key WHEN 1 THEN | |
N'ALTER TABLE ' + QUOTENAME(sc.name) + N'.' + QUOTENAME(t.name) + N' ADD CONSTRAINT ' + QUOTENAME(si.name) + N' PRIMARY KEY ' + | |
CASE WHEN si.index_id > 1 THEN N'NON' ELSE N'' END + N'CLUSTERED ' | |
ELSE N'CREATE ' + | |
CASE WHEN si.is_unique = 1 then N'UNIQUE ' ELSE N'' END + | |
CASE WHEN si.index_id > 1 THEN N'NON' ELSE N'' END + N'CLUSTERED ' + | |
N'INDEX ' + QUOTENAME(si.name) + N' ON ' + QUOTENAME(sc.name) + N'.' + QUOTENAME(t.name) + N' ' | |
END + | |
/* key def */ N'(' + key_definition + N')' + | |
/* includes */ CASE WHEN include_definition IS NOT NULL THEN | |
N' INCLUDE (' + include_definition + N')' | |
ELSE N'' | |
END + | |
/* filters */ CASE WHEN filter_definition IS NOT NULL THEN | |
N' WHERE ' + filter_definition ELSE N'' | |
END + | |
/* with clause - compression goes here */ | |
CASE WHEN row_compression_partition_list IS NOT NULL OR page_compression_partition_list IS NOT NULL | |
THEN N' WITH (' + | |
CASE WHEN row_compression_partition_list IS NOT NULL THEN | |
N'DATA_COMPRESSION = ROW ' + CASE WHEN psc.name IS NULL THEN N'' ELSE + N' ON PARTITIONS (' + row_compression_partition_list + N')' END | |
ELSE N'' END + | |
CASE WHEN row_compression_partition_list IS NOT NULL AND page_compression_partition_list IS NOT NULL THEN N', ' ELSE N'' END + | |
CASE WHEN page_compression_partition_list IS NOT NULL THEN | |
N'DATA_COMPRESSION = PAGE ' + CASE WHEN psc.name IS NULL THEN N'' ELSE + N' ON PARTITIONS (' + page_compression_partition_list + N')' END | |
ELSE N'' END | |
+ N')' | |
ELSE N'' | |
END + | |
/* ON where? filegroup? partition scheme? */ | |
' ON ' + CASE WHEN psc.name is null | |
THEN ISNULL(QUOTENAME(fg.name),N'') | |
ELSE psc.name + N' (' + partitioning_column.column_name + N')' | |
END | |
+ N';' | |
END AS index_create_statement, | |
si.name AS index_name, | |
partition_sums.reserved_in_row_GB, | |
partition_sums.reserved_LOB_GB, | |
partition_sums.row_count, | |
stat.user_seeks, | |
stat.user_scans, | |
stat.user_lookups, | |
user_updates AS queries_that_modified, | |
(SELECT MAX(user_reads) | |
FROM (VALUES (last_user_seek), (last_user_scan), (last_user_lookup)) AS value(user_reads)) AS last_user_read, | |
last_user_update, | |
partition_sums.partition_count, | |
si.allow_page_locks, | |
si.allow_row_locks, | |
si.is_hypothetical, | |
si.has_filter, | |
si.fill_factor, | |
si.is_unique, | |
ISNULL(pf.name, '/* Not partitioned */') AS partition_function, | |
ISNULL(psc.name, fg.name) AS partition_scheme_or_filegroup, | |
t.create_date AS table_created_date, | |
t.modify_date AS table_modify_date | |
FROM sys.indexes AS si | |
JOIN sys.tables AS t ON si.object_id=t.object_id | |
JOIN sys.schemas AS sc ON t.schema_id=sc.schema_id | |
LEFT JOIN sys.dm_db_index_usage_stats AS stat ON | |
stat.database_id = DB_ID() | |
and si.object_id=stat.object_id | |
and si.index_id=stat.index_id | |
LEFT JOIN sys.partition_schemes AS psc ON si.data_space_id=psc.data_space_id | |
LEFT JOIN sys.partition_functions AS pf ON psc.function_id=pf.function_id | |
LEFT JOIN sys.filegroups AS fg ON si.data_space_id=fg.data_space_id | |
/* Key list */ OUTER APPLY ( SELECT STUFF ( | |
(SELECT N', ' + QUOTENAME(c.name) + | |
CASE ic.is_descending_key WHEN 1 then N' DESC' ELSE N'' END | |
FROM sys.index_columns AS ic | |
JOIN sys.columns AS c ON | |
ic.column_id=c.column_id | |
and ic.object_id=c.object_id | |
WHERE ic.object_id = si.object_id | |
and ic.index_id=si.index_id | |
and ic.key_ordinal > 0 | |
ORDER BY ic.key_ordinal FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,'')) AS keys ( key_definition ) | |
/* Partitioning Ordinal */ OUTER APPLY ( | |
SELECT MAX(QUOTENAME(c.name)) AS column_name | |
FROM sys.index_columns AS ic | |
JOIN sys.columns AS c ON | |
ic.column_id=c.column_id | |
and ic.object_id=c.object_id | |
WHERE ic.object_id = si.object_id | |
and ic.index_id=si.index_id | |
and ic.partition_ordinal = 1) AS partitioning_column | |
/* Include list */ OUTER APPLY ( SELECT STUFF ( | |
(SELECT N', ' + QUOTENAME(c.name) | |
FROM sys.index_columns AS ic | |
JOIN sys.columns AS c ON | |
ic.column_id=c.column_id | |
and ic.object_id=c.object_id | |
WHERE ic.object_id = si.object_id | |
and ic.index_id=si.index_id | |
and ic.is_included_column = 1 | |
ORDER BY c.name FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,'')) AS includes ( include_definition ) | |
/* Partitions */ OUTER APPLY ( | |
SELECT | |
COUNT(*) AS partition_count, | |
CAST(SUM(ps.in_row_reserved_page_count)*8./1024./1024. AS NUMERIC(32,1)) AS reserved_in_row_GB, | |
CAST(SUM(ps.lob_reserved_page_count)*8./1024./1024. AS NUMERIC(32,1)) AS reserved_LOB_GB, | |
SUM(ps.row_count) AS row_count | |
FROM sys.partitions AS p | |
JOIN sys.dm_db_partition_stats AS ps ON | |
p.partition_id=ps.partition_id | |
WHERE p.object_id = si.object_id | |
and p.index_id=si.index_id | |
) AS partition_sums | |
/* row compression list by partition */ OUTER APPLY ( SELECT STUFF ( | |
(SELECT N', ' + CAST(p.partition_number AS VARCHAR(32)) | |
FROM sys.partitions AS p | |
WHERE p.object_id = si.object_id | |
and p.index_id=si.index_id | |
and p.data_compression = 1 | |
ORDER BY p.partition_number FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,'')) AS row_compression_clause ( row_compression_partition_list ) | |
/* data compression list by partition */ OUTER APPLY ( SELECT STUFF ( | |
(SELECT N', ' + CAST(p.partition_number AS VARCHAR(32)) | |
FROM sys.partitions AS p | |
WHERE p.object_id = si.object_id | |
and p.index_id=si.index_id | |
and p.data_compression = 2 | |
ORDER BY p.partition_number FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,'')) AS page_compression_clause ( page_compression_partition_list ) | |
WHERE | |
si.object_id=@objectid and | |
si.index_id = @indexid | |
ORDER BY 1,2,3; | |
/* Get fragmentation information from sys.dm_db_index_physical_stats */ | |
/* This is only doing a sampling, but will be slow against very large indexes */ | |
SELECT * | |
FROM sys.dm_db_index_physical_stats | |
(DB_ID(), @objectid, @indexid, NULL, 'sampled'); | |
GO |
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