The Ultimate Index Width Stats Reporter

SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
SET ANSI_PADDING ON
GO

IF OBJECT_ID('dbo.Util_IndexWidth', 'P') IS NOT NULL DROP PROCEDURE dbo.Util_IndexWidth
GO

/**
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Util_IndexWidth
By Jesse Roberge - YeshuaAgapao@Yahoo.com

Reports index length stats for indexes who's lengths exceeding parameterized thresholds (defaults to 0 - get all) for
total length and seek length, optionally filtering schemas and tables.

Update 2009-01-14:
Added IndexDepth and FillFactor output columns

Required Input Parameters:
none

Optional Input Parameters:
@SchemaName sysname=''Filters schemas.  Can use LIKE wildcards.  All schemas if blank.  Accepts LIKE Wildcards.
@TableName sysname=''Filters tables.  Can use LIKE wildcards.  All tables if blank.  Accepts LIKE Wildcards.
@MaxLength int=0Limits output to indexes with sum of all column max lengths exceeding this (OR with @SeekMaxLength)
@SeekMaxLength int=0Limits output to indexes with sum of seek column max lengths exceeding this (OR with @MaxLength)

Usage
EXECUTE Util_IndexWidth 'dbo', 'order%', @MaxLength=250, @SeekMaxLength=100

Copyright:
Licensed under the L-GPL - a weak copyleft license - you are permitted to use this as a component of a proprietary database and call this from proprietary software.
Copyleft lets you do anything you want except plagarize, conceal the source, proprietarize modifications, or prohibit copying & re-distribution of this script/proc.

This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    see <http://www.fsf.org/licensing/licenses/lgpl.html> for the license text.

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**/
CREATE PROCEDURE dbo.Util_IndexWidth
@SchemaName sysname='',
@TableName sysname='',
@MaxLength int=0,
@SeekMaxLength int=0
AS

SELECT
sys.schemas.schema_id, sys.schemas.name AS schema_name,
sys.objects.object_id, sys.objects.name AS object_name,
sys.indexes.index_id, ISNULL(sys.indexes.name, '---') AS index_name,
partitions.Rows, partitions.SizeMB, IndexProperty(sys.objects.object_id, sys.indexes.name, 'IndexDepth') AS IndexDepth,
sys.indexes.type, sys.indexes.type_desc, sys.indexes.fill_factor,
sys.indexes.is_unique, sys.indexes.is_primary_key, sys.indexes.is_unique_constraint, sys.indexes.is_unique,
TotalColumnCount, SeekColumnCount, IncludeColumnCount,
TotalMaxLength, SeekMaxLength, IncludeMaxLength,
TotalLargestColLength, SeekLargestColLength, IncludeLargestColLength
FROM
(
SELECT
sys.objects.object_id, sys.indexes.index_id,
COUNT(*) AS TotalColumnCount,
SUM(CASE WHEN sys.index_columns.is_included_column=0 THEN 1 ELSE 0 END) AS SeekColumnCount,
SUM(CASE WHEN sys.index_columns.is_included_column=1 THEN 1 ELSE 0 END) AS IncludeColumnCount,
SUM(sys.columns.max_length) AS TotalMaxLength,
SUM(CASE WHEN sys.index_columns.is_included_column=0 THEN sys.columns.max_length ELSE 0 END) AS SeekMaxLength,
SUM(CASE WHEN sys.index_columns.is_included_column=1 THEN sys.columns.max_length ELSE 0 END) AS IncludeMaxLength,
MAX(sys.columns.max_length) AS TotalLargestColLength,
MAX(CASE WHEN sys.index_columns.is_included_column=0 THEN sys.columns.max_length ELSE 0 END) AS SeekLargestColLength,
MAX(CASE WHEN sys.index_columns.is_included_column=1 THEN sys.columns.max_length ELSE 0 END) AS IncludeLargestColLength
FROM
sys.indexes
JOIN sys.objects ON sys.indexes.object_id=sys.objects.object_id
JOIN sys.schemas ON sys.objects.schema_id=sys.schemas.schema_id
JOIN sys.index_columns ON sys.indexes.object_id=sys.index_columns.object_id AND sys.indexes.index_id=sys.index_columns.index_id
JOIN sys.columns ON sys.index_columns.object_id=sys.columns.object_id AND sys.index_columns.column_id=sys.columns.column_id
JOIN sys.types ON sys.columns.user_type_id=sys.types.user_type_id
WHERE
sys.objects.type='u'
AND sys.schemas.name LIKE CASE WHEN @SchemaName='' THEN sys.schemas.name ELSE @SchemaName END
AND sys.objects.name LIKE CASE WHEN @TableName='' THEN sys.objects.name ELSE @TableName END
GROUP BY sys.objects.object_id, sys.indexes.index_id
HAVING SUM(sys.columns.max_length)>@MaxLength OR SUM(CASE WHEN sys.index_columns.is_included_column=0 THEN sys.columns.max_length ELSE 0 END)>@SeekMaxLength
) AS index_columns
JOIN sys.indexes ON sys.indexes.object_id=index_columns.object_id AND sys.indexes.index_id=index_columns.index_id
JOIN (
SELECT
object_id, index_id, SUM(row_count) AS Rows,
CONVERT(numeric(19,3), CONVERT(numeric(19,3), SUM(in_row_reserved_page_count+lob_reserved_page_count+row_overflow_reserved_page_count))/CONVERT(numeric(19,3), 128)) AS SizeMB
FROM sys.dm_db_partition_stats
GROUP BY object_id, index_id
) AS partitions ON sys.indexes.object_id=partitions.object_id AND sys.indexes.index_id=partitions.index_id
JOIN sys.objects ON index_columns.object_id=sys.objects.object_id
JOIN sys.schemas ON sys.objects.schema_id=sys.schemas.schema_id
ORDER BY TotalMaxLength DESC, sys.objects.name, index_columns.index_id
GO

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