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Thierry Schork
224
test idx usage with definition.sql
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224
test idx usage with definition.sql
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/*
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Test index / fk retrieval query
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02.11.2022, TSC
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*/
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USE [sandbox];
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IF OBJECT_ID('dbo.parent') IS NULL
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BEGIN
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--DROP TABLE dbo.parent
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ALTER TABLE [dbo].[child]
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DROP CONSTRAINT IF EXISTS [fk_child__REF__parent];
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CREATE TABLE [dbo].[parent] ([id] INT NOT NULL
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CONSTRAINT [pk_parent]
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PRIMARY KEY ([id]));
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PRINT 'parent table created';
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END;
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IF OBJECT_ID('dbo.child') IS NULL
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BEGIN
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--DROP TABLE dbo.child;
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CREATE TABLE [dbo].[child] ([id] INT IDENTITY NOT NULL,
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[parent_id] INT NOT NULL,
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[ins_date] SMALLDATETIME NOT NULL
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CONSTRAINT [df_child_COL_insDate]
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DEFAULT CURRENT_TIMESTAMP
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CONSTRAINT [pk_child]
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PRIMARY KEY ([id]));
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PRINT 'child table created';
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END;
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IF OBJECT_ID('fk_child__REF__parent') IS NULL
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BEGIN
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ALTER TABLE [dbo].[child]
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ADD CONSTRAINT [fk_child__REF__parent]
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FOREIGN KEY ([parent_id])
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REFERENCES [dbo].[parent] ([id]);
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PRINT 'fk created';
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END;
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IF INDEXPROPERTY(OBJECT_ID('child'), 'CIX_child_parent_id', 'IndexID') IS NULL
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BEGIN;
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CREATE NONCLUSTERED INDEX [CIX_child_parent_id]
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ON [dbo].[child] ([parent_id]);
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PRINT 'idx created';
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END;
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TRUNCATE TABLE [dbo].[child];
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DELETE FROM [dbo].[parent]
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WHERE 1 = 1;
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INSERT INTO [dbo].[parent] ([id])
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VALUES (1);
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INSERT INTO [dbo].[child] ([parent_id])
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VALUES (1);
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SELECT SCHEMA_NAME([tab].[schema_id]) + '.' + [tab].[name] AS [table],
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[col].[column_id],
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[col].[name] AS [column_name],
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CASE
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WHEN [fk].[object_id] IS NOT NULL THEN '>-'
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ELSE NULL END AS [rel],
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SCHEMA_NAME([pk_tab].[schema_id]) + '.' + [pk_tab].[name] AS [primary_table],
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[pk_col].[name] AS [pk_column_name],
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[fk_cols].[constraint_column_id] AS [NO],
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[fk].[name] AS [fk_constraint_name]
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FROM [sys].[tables] [tab]
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INNER JOIN [sys].[columns] [col]
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ON [col].[object_id] = [tab].[object_id]
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LEFT OUTER JOIN [sys].[foreign_key_columns] [fk_cols]
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ON [fk_cols].[parent_object_id] = [tab].[object_id]
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AND [fk_cols].[parent_column_id] = [col].[column_id]
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LEFT OUTER JOIN [sys].[foreign_keys] [fk]
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ON [fk].[object_id] = [fk_cols].[constraint_object_id]
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LEFT OUTER JOIN [sys].[tables] [pk_tab]
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ON [pk_tab].[object_id] = [fk_cols].[referenced_object_id]
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LEFT OUTER JOIN [sys].[columns] [pk_col]
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ON [pk_col].[column_id] = [fk_cols].[referenced_column_id]
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AND [pk_col].[object_id] = [fk_cols].[referenced_object_id]
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WHERE [fk].[object_id] IS NOT NULL
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--AND SCHEMA_NAME(tab.SCHEMA_ID) = 'dbo'
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--AND tab.name='customer'
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ORDER BY SCHEMA_NAME([tab].[schema_id]) + '.' + [tab].[name],
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[col].[column_id];
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;WITH [ColInfo]
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AS (SELECT [o].[name] AS [TblName],
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[s].[name] + '.' + [o].[name] AS [SchemaTbl],
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[i].[name] AS [IndexName],
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[i].[is_primary_key] AS [IsPrimaryKey],
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[i].[is_unique_constraint] AS [IsUniqueConstraint],
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[i].[is_unique] AS [IsUnique],
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[c].[name] AS [ColName],
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[c].[is_computed] AS [IsComputedCol],
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[ic].[is_included_column] AS [IsIncludedCol],
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[ic].[key_ordinal],
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[i].[filter_definition] AS [FilterDefinition]
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FROM [sys].[objects] [o]
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INNER JOIN [sys].[schemas] [s]
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ON [o].[schema_id] = [s].[schema_id]
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INNER JOIN [sys].[columns] [c]
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ON [o].[object_id] = [c].[object_id]
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INNER JOIN [sys].[indexes] [i]
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ON [c].[object_id] = [i].[object_id]
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INNER JOIN [sys].[index_columns] [ic]
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ON [i].[index_id] = [ic].[index_id]
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AND [o].[object_id] = [ic].[object_id]
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AND [c].[column_id] = [ic].[column_id])
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--- Index Read/Write stats (all tables in current DB) ordered by Reads (Query 62) (Overall Index Usage - Reads)
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SELECT [o].[name] AS [tblName],
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[o].[type],
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[i].[name] AS [IndexName],
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[i].[index_id],
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[s].[user_seeks] + [s].[user_scans] + [s].[user_lookups] AS [Reads],
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[s].[user_updates] AS [Writes],
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CASE
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WHEN [s].[user_updates] > [s].[user_seeks] + [s].[user_scans] + [s].[user_lookups] THEN
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[s].[user_updates] - ([s].[user_seeks] + [s].[user_scans] + [s].[user_lookups])
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ELSE ([s].[user_seeks] + [s].[user_scans] + [s].[user_lookups]) - [s].[user_updates] END AS [delta],
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[i].[type_desc] AS [IndexType],
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[i].[fill_factor] AS [FillFactor],
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[i].[has_filter],
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[i].[filter_definition],
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[s].[last_user_scan],
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[s].[last_user_lookup],
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[s].[last_user_seek],
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[idx_cols].[IndexColumns],
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[idx_cols].[IncludedColumns],
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[fk].[primary_table],
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[fk].[pk_column_name],
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[fk].[fk_constraint_name]
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FROM [sys].[dm_db_index_usage_stats] AS [s] WITH (NOLOCK)
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INNER JOIN [sys].[indexes] AS [i] WITH (NOLOCK)
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ON [s].[object_id] = [i].[object_id]
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INNER JOIN [sys].[objects] [o] WITH (NOLOCK)
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ON [s].[object_id] = [o].[object_id]
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OUTER APPLY ( SELECT DISTINCT [x].[TblName],
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[x].[IndexName],
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[x].[IsPrimaryKey],
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[x].[IsUniqueConstraint],
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[x].[IsUnique],
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--,size.IndexSizeKB
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[c].[IndexColumns],
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[ci].[IncludedColumns],
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[cc].[ComputedColumns],
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[x].[FilterDefinition]
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FROM [ColInfo] [x]
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CROSS APPLY ( SELECT STUFF([sq].[strXML], 1, 2, '') AS [IndexColumns]
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FROM ( SELECT ', ' + ISNULL([x2].[ColName], '')
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FROM [ColInfo] [x2]
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WHERE [x].[TblName] = [x2].[TblName]
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AND [x].[IndexName] = [x2].[IndexName]
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AND [x2].[IsIncludedCol] = 0
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ORDER BY [x2].[key_ordinal]
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FOR XML PATH('')) [sq]([strXML]) ) [c]
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OUTER APPLY ( SELECT STUFF([sq].[strXML], 1, 2, '') AS [IncludedColumns]
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FROM ( SELECT ', ' + ISNULL([x2].[ColName], '')
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FROM [ColInfo] [x2]
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WHERE [x].[TblName] = [x2].[TblName]
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AND [x].[IndexName] = [x2].[IndexName]
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AND [x2].[IsIncludedCol] = 1
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ORDER BY [x2].[key_ordinal]
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FOR XML PATH('')) [sq]([strXML]) ) [ci]
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OUTER APPLY ( SELECT STUFF([sq].[strXML], 1, 2, '') AS [ComputedColumns]
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FROM ( SELECT ', ' + ISNULL([x2].[ColName], '')
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FROM [ColInfo] [x2]
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WHERE [x].[TblName] = [x2].[TblName]
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AND [x].[IndexName] = [x2].[IndexName]
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AND [x2].[IsComputedCol] = 1
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ORDER BY [x2].[key_ordinal]
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FOR XML PATH('')) [sq]([strXML]) ) [cc]
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WHERE [x].[TblName] = [o].[name]
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AND [x].[IndexName] = [i].[name]) [idx_cols]
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LEFT OUTER JOIN ( SELECT SCHEMA_NAME([tab].[schema_id]) + '.' + [tab].[name] AS [table],
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[col].[column_id],
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[col].[name] AS [column_name],
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CASE
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WHEN [fk].[object_id] IS NOT NULL THEN '>-'
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ELSE NULL END AS [rel],
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SCHEMA_NAME([pk_tab].[schema_id]) + '.' + [pk_tab].[name] AS [primary_table],
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[pk_col].[name] AS [pk_column_name],
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[fk_cols].[constraint_column_id] AS [NO],
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[fk].[name] AS [fk_constraint_name],
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[tab].[name] AS [tbl_name]
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FROM [sys].[tables] [tab]
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INNER JOIN [sys].[columns] [col]
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ON [col].[object_id] = [tab].[object_id]
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LEFT OUTER JOIN [sys].[foreign_key_columns] [fk_cols]
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ON [fk_cols].[parent_object_id] = [tab].[object_id]
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AND [fk_cols].[parent_column_id] = [col].[column_id]
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LEFT OUTER JOIN [sys].[foreign_keys] [fk]
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ON [fk].[object_id] = [fk_cols].[constraint_object_id]
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LEFT OUTER JOIN [sys].[tables] [pk_tab]
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ON [pk_tab].[object_id] = [fk_cols].[referenced_object_id]
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LEFT OUTER JOIN [sys].[columns] [pk_col]
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ON [pk_col].[column_id] = [fk_cols].[referenced_column_id]
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AND [pk_col].[object_id] = [fk_cols].[referenced_object_id]
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WHERE [fk].[object_id] IS NOT NULL) [fk]
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ON [fk].[tbl_name] = [o].[name]
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AND [idx_cols].[IndexColumns] LIKE '%' + [fk].[column_name] + '%'
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WHERE [o].[type] = 'U' -- user table
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AND [i].[index_id] = [s].[index_id]
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AND [s].[database_id] = DB_ID()
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AND [o].[name] = 'child'
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--AND i.name IN
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-- (
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-- N'NCIX_Entry_COL_ET_accounting_period',
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-- N'NCIX_Entry_COL_ET_entry_type',
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-- N'NCIX_Entry_COL_ET_predefined_entry',
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-- N'NCIX_Entry_COL_ET_bmc_user_profile',
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-- N'NCIX_Entry_COL_ET_currency',
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-- N'NCIX_Entry_COL_ET_entry_address'
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-- )
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ORDER BY [delta] DESC
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--ORDER BY user_seeks + user_scans + user_lookups DESC -- Order by reads
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--ORDER BY s.user_updates DESC OPTION -- Order by writes
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OPTION (RECOMPILE);
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