Files
2022-12-30 12:13:35 +01:00

687 lines
30 KiB
PL/PgSQL

/*=============================================================================
Maintain and align indexes on Arizona.dbo.entry
TODO:
allow to skip INDEX DROP for unlisted indexes
Parameters
----------------------
Populate the var table @indexesToMaintains to drop / create and rename indexes to be aligned.
You need to specify those fields:
* schemaName, tableName: the schema and table name for which you want to maintain the indexes.
This script was written with working against several tables in mind, but is not (yet) tested to handle this case.
* columnsName: What columns are part of the index key, in the correct order
As we have divergent indexes names, we must use the index columns as the key to find the indexes.
* includedColumns_inp: if the index have included columns, list them here.
When an index is found, the included columns list it also compared to determine if the index is aligned.
* expectedIndexName_inp: The name the index should have. It will be used when creating missing indexes or renaming existing indexes
The index name is optionnal if we specify in the table that the index must be dropped.
* isToBeDeleted_inp: if true, indicate that the index should be dropped.
* isToBeRecreated_inp: if true, will drop and re-create the index even if the structure matches.
* isClustered_inp: if true and the index must be (re-)created, it will be created as a clustered index
* isUnique_inp: if true and the index must be (re-)created, it will be created as a unique index
Note that:
* Matching is always made from the columns of the index, never on the name of the index.
The reason is that we might have difference in the name of the index between several servers.
* If an index exists with the name A, but your list contains a similar index with the name B, index A will be renamed to B with sp_rename
* For each table(s) referenced in @indexesToMaintains, if an index exists that is not listed in the variable table it will be considered to be
dropped if @DoDropExistingIndexesNotReferenced is set to 1.
* If you list a specific existing index to be dropped in @indexesToMaintains then the following fields are optionnal:
expected index name
flag isClustered
flag isUnique
Context
----------------------
In any databases
Creation : 09.11.2022 / TSC
Modifications:
=============================================================================*/
USE [Arizona];
GO
BEGIN TRANSACTION;
SET XACT_ABORT ON;
SET NOCOUNT ON;
DECLARE @query VARCHAR(MAX); /* for dynamic sql */
DECLARE @schemaName VARCHAR(100); /* used in cursor */
DECLARE @tableName VARCHAR(100); /* used in cursor */
/*
If set to true, the script will not apply the change.
Generated statements are always printed on the message tab.
*/
DECLARE @DoOnlyOutputStatement BIT = 0;
/*
If the script find local indexes that are not listed in the variable table, should it drop them or not ?
An index whose definition is not aligned with the temp table or flagged "to be rebuilt" will always be dropped before creation.
*/
DECLARE @DoDropExistingIndexesNotReferenced BIT = 0;
DECLARE @indexesToMaintains TABLE(
[Id] INT IDENTITY NOT NULL
,[SchemaName] VARCHAR(100) NOT NULL /* the schema the table is part of */
,[TableName] VARCHAR(100) NOT NULL /* On which table is the index, whithout the schema */
,columnsName_inp VARCHAR(MAX) NOT NULL /* list all the columns of the index, in the correct orders */
,isClustered_inp BIT NOT NULL DEFAULT 0 /* Is the indexe a clustered index ? */
,isUnique_inp BIT NOT NULL DEFAULT 0 /* Is the index unique ? */
,includedColumns_inp VARCHAR(MAX)NULL /* list all the included columns the index should have. only relevant for idx not to be dropped */
,isToBeDeleted_inp BIT NOT NULL DEFAULT 0 /* must the script drop this index ? */
,isToBeRecreated_inp BIT NOT NULL DEFAULT 0 /* must the script recreate this index ?
If an existing index differs from the definition, it will be dropped and the correct one created.
Use this only to force the re-creation even if the structure is identical */
,expectedIndexName_inp VARCHAR(MAX) NULL /* the name the index should have, used to determine if a rename of the existing index should be done */
,indexName VARCHAR(MAX) NULL /* computed by the script. The index name on this system, as indexes name can be different accross systems*/
,isIndexFound_comp BIT NOT NULL DEFAULT 0 /* computed by the script. set to 1 if the index is present on the server */
,isToBeCreated_comp BIT NULL DEFAULT 0 /* computed by the script. does this index will be created on the server ? */
,isToBeRenamed_comp BIT NULL DEFAULT 0 /* computed by the script. does this index will be renamed ? */
,isToBeDeleted_comp BIT NULL DEFAULT 0 /* computed by the script. does this index will be deleted ? */
,isToBeRecreated_comp BIT NULL DEFAULT 0 /* computed by the script. does this index will be re-created ? */
,internal_includedColumnsMatch BIT NULL /* computed ba the script. Are the expected and actual included columns identical ? */
,internal_actualColumns VARCHAR(MAX) NULL /* the actual columns in the existing index */
,internal_actualIncludedColumns VARCHAR(MAX) NULL /* the actual columns in the INCLUDE part of the index */
,internal_statusMsg VARCHAR(MAX) /* Message, used for debug */
);
/* Declare the expected structure of the indexes */
INSERT INTO @indexesToMaintains ([columnsName_inp],
[isToBeDeleted_inp],
[isToBeRecreated_inp],
[expectedIndexName_inp],
[includedColumns_inp],
[schemaName],
[tableName],
[isClustered_inp],
[isUnique_inp])
/* indexe(s) we do want */
VALUES('Entry_id',0,0,'PK_Entry_id', NULL,'dbo','entry',0,0)
,('ET_batch_run',0,0,'NCIX_Entry_COL_ET_batch_run',NULL,'dbo','entry',0,0)
,('ET_accounting_period',0,0,'NCIX_Entry_COL_ET_accounting_period','Entry_ID','dbo','entry',0,0)
,('ET_document_header',0,0,'NCIX_Entry_COL_ET_document_header','ET_debit_currency_amount, ET_credit_currency_amount','dbo','entry',0,0)
,('ET_account, ET_document_header',0,0,'NCIX_Entry_COL_ET_account','Entry_ID','dbo','entry',0,0)
,('ET_reconciliation_status, ET_account, ET_document_header',0,0,'NCIX_Entry_COL_ET_reconciliation_status','ET_debit_base_amount, ET_credit_base_amount, ET_reconciliation_base_amount','dbo','entry',0,0)
,('ET_predefined_entry',0,0,'NCIX_Entry_COL_ET_predefined_entry',NULL,'dbo','entry',0,0)
,('ET_entry_address',0,0,'NCIX_Entry_COL_ET_entry_address',NULL,'dbo','entry',0,0)
,('ET_currency',0,0,'NCIX_Entry_COL_ET_currency',NULL,'dbo','entry',0,0)
/* indexe(s) used in central, even if not in pharmacies*/
,('ET_entry_type',0,0,'NCIX_Entry_COL_ET_entry_type',NULL,'dbo','entry',0,0)
/* indexe(s) we really want to drop*/
,('ET_master_ID',1,0,'NCIX_Entry_COL_ET_master_ID',NULL,'dbo','entry',0,0)
,('ET_bmc_user_profile',1,0,'NCIX_Entry_COL_ET_bmc_user_profile',NULL,'dbo','entry',0,0)
,('ET_sales_tax_code',1,0,'NCIX_Entry_COL_ET_sales_tax_code',NULL,'dbo','entry',0,0)
,('ET_APS_TS', 1, 0, 'NCIX_Entry_COL_ET_APS_TS',NULL,'dbo','entry',0,0)
;
/* check for duplicate */
DECLARE @msg VARCHAR(MAX) = '';
SELECT @msg = @msg + 'Duplicate index (on expected index name) found in indexes definition. Table ['+[itm].[SchemaName]+'].['+[itm].[TableName]+'], expected index name ['+[itm].[expectedIndexName_inp]+']'+CHAR(13)+CHAR(10)
FROM @indexesToMaintains [itm]
JOIN (
SELECT
[ii].[expectedIndexName_inp] AS [key]
FROM @indexesToMaintains [ii]
GROUP BY [ii].[expectedIndexName_inp]
HAVING COUNT(1)>1
) d ON d.[key] = [itm].[expectedIndexName_inp]
GROUP BY [itm].[SchemaName], [itm].[TableName], [itm].[expectedIndexName_inp]
;
/* stop here if we have an issue in the variable table */
IF @msg <> ''
BEGIN
RAISERROR(@msg, 16, 4);
IF @@TRANCOUNT>0
BEGIN
ROLLBACK TRANSACTION;
END
RETURN
END
SET @msg = '';
SELECT @msg = @msg + 'Duplicate index (on column definition) found in indexes definition. Table ['+[itm].[SchemaName]+'].['+[itm].[TableName]+'], columns in index: '+[itm].[columnsName_inp]
+ CASE
WHEN [itm].[includedColumns_inp] IS NOT NULL THEN ', included colum(s): '+[itm].[includedColumns_inp]
ELSE ''
END
+CHAR(13)+CHAR(10)
FROM @indexesToMaintains [itm]
JOIN (
SELECT
[ii].[columnsName_inp]+'_'+ISNULL([ii].[includedColumns_inp],'') AS [key]
FROM @indexesToMaintains [ii]
GROUP BY [ii].[columnsName_inp]+'_'+ISNULL([ii].[includedColumns_inp],'')
HAVING COUNT(1)>1
) d ON d.[key] = [itm].[columnsName_inp]+'_'+ISNULL([itm].[includedColumns_inp],'')
GROUP BY [itm].[SchemaName], [itm].[TableName], [itm].[columnsName_inp], [itm].[includedColumns_inp]
;
/* stop here if we have an issue in the variable table */
IF @msg <> ''
BEGIN
RAISERROR(@msg, 16, 4);
IF @@TRANCOUNT>0
BEGIN
ROLLBACK TRANSACTION;
END
RETURN
END
/* fetch the indexes name on the current instance */
DECLARE curIdxName CURSOR FAST_FORWARD READ_ONLY FOR
SELECT DISTINCT [itm].[schemaName], [itm].[tableName]
FROM @indexesToMaintains [itm];
OPEN curIdxName;
FETCH NEXT FROM curIdxName INTO @schemaName, @tableName;
WHILE @@FETCH_STATUS = 0
BEGIN
;WITH ColInfo
AS (
SELECT
o.[Name] AS TblName
,s.[Name] + '.' + o.[Name] AS SchemaTbl
,i.[Name] AS IndexName
,i.[is_primary_key] AS IsPrimaryKey
,i.[is_unique_constraint] AS IsUniqueConstraint
,i.[is_unique] AS IsUnique
,c.[Name] AS ColName
,c.[is_computed] AS IsComputedCol
,ic.[is_included_column] AS IsIncludedCol
,ic.[key_ordinal]
,i.[filter_definition] AS FilterDefinition
FROM [sys].[objects] o
INNER JOIN [sys].[schemas] s
ON o.SCHEMA_ID = s.SCHEMA_ID
INNER JOIN [sys].[COLUMNS] c
ON o.OBJECT_ID = c.OBJECT_ID
INNER JOIN [sys].[indexes] i
ON c.OBJECT_ID = i.OBJECT_ID
INNER JOIN [sys].[index_columns] ic
ON i.[index_id] = ic.[index_id]
AND o.OBJECT_ID = ic.OBJECT_ID
AND c.[column_id] = ic.[column_id]
)
/* map the list to the actual indexes */
UPDATE [itm] SET [itm].[indexName] = i.[name]
,[itm].[internal_includedColumnsMatch] = CASE
WHEN ISNULL([itm].[includedColumns_inp],'') = ISNULL([idx_cols].[includedColumns],'') THEN 1
ELSE 0
END
,[itm].[internal_actualIncludedColumns] = [idx_cols].[includedColumns]
,[itm].[internal_actualColumns] = [idx_cols].[IndexColumns]
,[itm].[isIndexFound_comp] = 1
,[itm].[isToBeCreated_comp] = 0
FROM [sys].[indexes] AS i WITH (NOLOCK)
INNER JOIN [sys].[objects] o WITH (NOLOCK)
ON i.OBJECT_ID = o.OBJECT_ID
OUTER APPLY (
SELECT DISTINCT
x.TblName
,x.IndexName
,x.IsPrimaryKey
,x.IsUniqueConstraint
,x.IsUnique
,c.IndexColumns
,ci.includedColumns
,cc.ComputedColumns
,x.FilterDefinition
FROM ColInfo x
CROSS APPLY (
SELECT STUFF(sq.strXML, 1, 2, '') AS IndexColumns
FROM (
SELECT ', ' + ISNULL(x2.ColName, '')
FROM ColInfo x2
WHERE x.TblName = x2.TblName
AND x.IndexName = x2.IndexName
AND x2.IsIncludedCol = 0
ORDER BY x2.[key_ordinal]
FOR XML PATH('')
) sq(strXML)
) c
OUTER APPLY (
SELECT STUFF(sq.strXML, 1, 2, '') AS includedColumns
FROM (
SELECT ', ' + ISNULL(x2.ColName, '')
FROM ColInfo x2
WHERE x.TblName = x2.TblName
AND x.IndexName = x2.IndexName
AND x2.IsIncludedCol = 1
ORDER BY x2.[key_ordinal]
FOR XML PATH('')
) sq(strXML)
) ci
OUTER APPLY (
SELECT STUFF(sq.strXML, 1, 2, '') AS ComputedColumns
FROM (
SELECT ', ' + ISNULL(x2.ColName, '')
FROM ColInfo x2
WHERE x.TblName = x2.TblName
AND x.IndexName = x2.IndexName
AND x2.IsComputedCol = 1
ORDER BY x2.[key_ordinal]
FOR XML PATH('')
) sq(strXML)
) cc
WHERE x.TblName = o.[Name]
AND x.IndexName = i.[Name]
) idx_cols
LEFT OUTER JOIN (
SELECT
SCHEMA_NAME(tab.SCHEMA_ID) + '.' + tab.[Name] AS [table]
,col.[column_id]
,col.[Name] AS [COLUMN_NAME]
,CASE
WHEN fk.OBJECT_ID IS NOT NULL THEN '>-'
ELSE NULL
END AS rel
,SCHEMA_NAME(pk_tab.SCHEMA_ID) + '.' + pk_tab.[Name] AS primary_table
,pk_col.[Name] AS pk_column_name
,fk_cols.[constraint_column_id] AS NO
,fk.[Name] AS fk_constraint_name
,tab.[Name] AS tbl_name
FROM [sys].[TABLES] tab
INNER JOIN [sys].[COLUMNS] col
ON col.OBJECT_ID = tab.OBJECT_ID
LEFT OUTER JOIN [sys].[foreign_key_columns] fk_cols
ON fk_cols.[parent_object_id] = tab.OBJECT_ID
AND fk_cols.[parent_column_id] = col.[column_id]
LEFT OUTER JOIN [sys].[foreign_keys] fk
ON fk.OBJECT_ID = fk_cols.[constraint_object_id]
LEFT OUTER JOIN [sys].[TABLES] pk_tab
ON pk_tab.OBJECT_ID = fk_cols.[referenced_object_id]
LEFT OUTER JOIN [sys].[COLUMNS] pk_col
ON pk_col.[column_id] = fk_cols.[referenced_column_id]
AND pk_col.OBJECT_ID = fk_cols.[referenced_object_id]
WHERE fk.OBJECT_ID IS NOT NULL
) fk
ON fk.tbl_name = o.[Name]
AND idx_cols.IndexColumns LIKE '%' + fk.[COLUMN_NAME] + '%'
INNER JOIN @indexesToMaintains [itm]
ON itm.[schemaName] = @schemaName
AND itm.[tableName] = @tableName
AND itm.[columnsName_inp] COLLATE Latin1_General_CI_AI = [idx_cols].[IndexColumns] COLLATE Latin1_General_CI_AI
AND ISNULL([itm].[includedColumns_inp],'') COLLATE Latin1_General_CI_AI = ISNULL([idx_cols].[includedColumns],'') COLLATE Latin1_General_CI_AI
WHERE o.TYPE = 'U' -- user table
--AND i.[index_id] = s.[index_id]
--AND s.[database_id] = DB_ID()
AND o.[Name] = @tableName
AND SCHEMA_NAME(o.SCHEMA_ID) = @schemaName
OPTION (RECOMPILE);
/* Add the indexes not in the list but present on the server to the list */
;WITH ColInfo
AS (
SELECT
o.[Name] AS TblName
,SCHEMA_NAME(o.[schema_id]) AS SchemaName
,s.[Name] + '.' + o.[Name] AS SchemaTbl
,i.[Name] AS IndexName
,i.[is_primary_key] AS IsPrimaryKey
,i.[is_unique_constraint] AS IsUniqueConstraint
,i.[is_unique] AS IsUnique
,c.[Name] AS ColName
,c.[is_computed] AS IsComputedCol
,ic.[is_included_column] AS IsIncludedCol
,ic.[key_ordinal]
,i.[filter_definition] AS FilterDefinition
FROM [sys].[objects] o
INNER JOIN [sys].[schemas] s
ON o.SCHEMA_ID = s.SCHEMA_ID
INNER JOIN [sys].[COLUMNS] c
ON o.OBJECT_ID = c.OBJECT_ID
INNER JOIN [sys].[indexes] i
ON c.OBJECT_ID = i.OBJECT_ID
INNER JOIN [sys].[index_columns] ic
ON i.[index_id] = ic.[index_id]
AND o.OBJECT_ID = ic.OBJECT_ID
AND c.[column_id] = ic.[column_id]
)
INSERT INTO @indexesToMaintains (
[schemaName]
,[tableName]
,[columnsName_inp]
,[indexName]
,[isToBeDeleted_inp]
,[isToBeDeleted_comp]
,[isToBeRecreated_inp]
,[internal_statusMsg]
,[internal_actualIncludedColumns]
,[internal_actualColumns]
,[isIndexFound_comp]
,[isToBeCreated_comp]
,[expectedIndexName_inp]
)
SELECT DISTINCT
@schemaName AS [SchemaName]
,@tableName AS [TableName]
,c.[IndexColumns] AS [columnsName]
,x.[IndexName] AS indexName
,0 AS [isToBeDeleted_inp]
,CASE
WHEN EXISTS(
SELECT 1
FROM @indexesToMaintains [itm]
WHERE itm.[expectedIndexName_inp] = x.[IndexName]
OR ISNULL(itm.[columnsName_inp],'') <> ISNULL(itm.[internal_actualColumns],'')
OR ISNULL(itm.[includedColumns_inp],'') <> ISNULL(itm.[internal_actualIncludedColumns],'')
) THEN 1
WHEN @DoDropExistingIndexesNotReferenced = 1 THEN 1
ELSE 0
END AS [isToBeDeleted_comp]
,0 AS [isToBeRecreated_inp]
,CASE
WHEN EXISTS(
SELECT 1
FROM @indexesToMaintains [itm]
WHERE itm.[expectedIndexName_inp] = x.[IndexName]
OR ISNULL(itm.[columnsName_inp],'') <> ISNULL(itm.[internal_actualColumns],'')
OR ISNULL(itm.[includedColumns_inp],'') <> ISNULL(itm.[internal_actualIncludedColumns],'')
) THEN 'Index present locally not as expected, drop before creation'
WHEN @DoDropExistingIndexesNotReferenced = 1 THEN 'Index present locally only'
ELSE NULL
END AS [internal_statusMsg]
,ci.[includedColumns] AS [internal_actualIncludedColumns]
,c.[IndexColumns] AS [internal_actualColumns]
,1 AS [isIndexFound_comp]
,0 AS [isToBeCreated_comp]
,x.[IndexName] AS [expectedIndexName_inp]
FROM ColInfo x
CROSS APPLY(SELECT IndexColumns = STUFF(sq.strXML, 1, 2, '')
FROM ( SELECT ', ' + ISNULL(x2.ColName, '')
FROM ColInfo x2
WHERE x.TblName = x2.TblName AND x.IndexName = x2.IndexName AND x2.IsIncludedCol = 0
ORDER BY x2.key_ordinal
FOR XML PATH('')
) sq (strXML)
) c
Outer APPLY(SELECT IncludedColumns = STUFF(sq.strXML, 1, 2, '')
FROM ( SELECT ', ' + ISNULL(x2.ColName, '')
FROM ColInfo x2
WHERE x.TblName = x2.TblName AND x.IndexName = x2.IndexName AND x2.IsIncludedCol = 1
ORDER BY x2.key_ordinal
FOR XML PATH('')
) sq (strXML)
) ci
Outer APPLY(SELECT ComputedColumns = STUFF(sq.strXML, 1, 2, '')
FROM ( SELECT ', ' + ISNULL(x2.ColName, '')
FROM ColInfo x2
WHERE x.TblName = x2.TblName AND x.IndexName = x2.IndexName AND x2.IsComputedCol = 1
ORDER BY x2.key_ordinal
FOR XML PATH('')
) sq (strXML)
) cc
LEFT OUTER JOIN (
SELECT
SCHEMA_NAME(tab.SCHEMA_ID) + '.' + tab.[Name] AS [table]
,col.[column_id]
,col.[Name] AS [COLUMN_NAME]
,CASE
WHEN fk.OBJECT_ID IS NOT NULL THEN '>-'
ELSE NULL
END AS rel
,SCHEMA_NAME(pk_tab.SCHEMA_ID) + '.' + pk_tab.[Name] AS primary_table
,pk_col.[Name] AS pk_column_name
,fk_cols.[constraint_column_id] AS NO
,fk.[Name] AS fk_constraint_name
,tab.[Name] AS tbl_name
FROM [sys].[TABLES] tab
INNER JOIN [sys].[COLUMNS] col
ON col.OBJECT_ID = tab.OBJECT_ID
LEFT OUTER JOIN [sys].[foreign_key_columns] fk_cols
ON fk_cols.[parent_object_id] = tab.OBJECT_ID
AND fk_cols.[parent_column_id] = col.[column_id]
LEFT OUTER JOIN [sys].[foreign_keys] fk
ON fk.OBJECT_ID = fk_cols.[constraint_object_id]
LEFT OUTER JOIN [sys].[TABLES] pk_tab
ON pk_tab.OBJECT_ID = fk_cols.[referenced_object_id]
LEFT OUTER JOIN [sys].[COLUMNS] pk_col
ON pk_col.[column_id] = fk_cols.[referenced_column_id]
AND pk_col.OBJECT_ID = fk_cols.[referenced_object_id]
WHERE fk.OBJECT_ID IS NOT NULL
) fk
ON fk.tbl_name = x.[TblName]
AND [c].[IndexColumns] LIKE '%' + fk.[COLUMN_NAME] + '%'
WHERE x.[SchemaName] =@schemaName
AND x.[TblName] =@tableName
AND NOT EXISTS(
SELECT 1
FROM @indexesToMaintains [itm2]
WHERE 1=1
AND ISNULL(itm2.[internal_actualColumns],'') = ISNULL(c.[IndexColumns],'')
AND ISNULL(itm2.[internal_actualIncludedColumns],'') = ISNULL(ci.[includedColumns],'')
)
OPTION (RECOMPILE);
FETCH NEXT FROM curIdxName INTO @schemaName, @tableName;
END
CLOSE curIdxName;
DEALLOCATE curIdxName;
/* Adjust the "_comp" flags to create a matrix of actions */
/* to be created */
UPDATE [itm]
SET
[itm].[isToBeCreated_comp] = CASE
WHEN [itm].[isToBeDeleted_inp] = 0 THEN 1
ELSE 0
END
FROM @indexesToMaintains [itm]
WHERE [itm].[indexName] IS NULL /* index was not found on the server */
AND [itm].[expectedIndexName_inp] IS NOT NULL /* we did gave an index name, ie: we want to create it if missing */
;
/* to be renamed */
UPDATE [itm]
SET
[itm].[isToBeRenamed_comp] = 1
FROM @indexesToMaintains [itm]
WHERE [itm].[indexName] IS NOT NULL /* index was not found on the server */
AND [itm].[expectedIndexName_inp] IS NOT NULL /* we did gave an index name, ie: we expect that index to be present */
AND [indexName] <> [itm].[expectedIndexName_inp]
AND [isToBeDeleted_inp] = 0
AND [isToBeDeleted_comp] = 0
;
/* to be re-created */
UPDATE [itm]
SET
[itm].[isToBeRecreated_comp] = 1
FROM @indexesToMaintains [itm]
WHERE [isToBeRecreated_inp] = 1
;
/* to be deleted, because specified in table */
UPDATE itm
SET
[itm].[isToBeDeleted_comp] = CASE
WHEN [itm].[isIndexFound_comp] = 0 THEN 0
ELSE 1
END
,[itm].[isToBeRecreated_comp] = 0 /* deletion override re-create */
,[itm].[isToBeRenamed_comp] = 0 /* deletion override rename */
FROM @indexesToMaintains [itm]
WHERE [itm].[isToBeDeleted_inp] = 1
;
/* to be deleted, because different to specs. link on index name */
UPDATE [exp]
SET
[exp].[isToBeCreated_comp] = 1 /* flag the expected index "to be created" */
FROM @indexesToMaintains [exp] --expected
JOIN @indexesToMaintains [act] --actual
ON [act].[indexName] = [exp].[expectedIndexName_inp]
WHERE [exp].[isToBeDeleted_comp] = 0
AND [exp].[isToBeCreated_comp] = 0
AND [exp].[isToBeRenamed_comp] = 0
AND [exp].[isToBeRecreated_inp] = 0
AND (
[exp].[columnsName_inp] != [act].[internal_actualColumns]
OR [exp].[includedColumns_inp] != [act].[internal_actualIncludedColumns]
)
;
UPDATE [act]
SET
[act].[isToBeDeleted_comp] = 1 /* flag the actual index "to be deleted" */
FROM @indexesToMaintains [exp] --expected
JOIN @indexesToMaintains [act] --actual
ON [act].[indexName] = [exp].[expectedIndexName_inp]
WHERE (
[exp].[columnsName_inp] != [act].[internal_actualColumns]
OR [exp].[includedColumns_inp] != [act].[internal_actualIncludedColumns]
)
;
/* to be deleted, because different to specs. link on index columns */
UPDATE [exp]
SET
[exp].[isToBeCreated_comp] = 1 /* flag the expected index "to be created" */
FROM @indexesToMaintains [exp] --expected
JOIN @indexesToMaintains [act] --actual
ON [act].[internal_actualColumns] = [exp].[columnsName_inp]
WHERE (
[exp].[columnsName_inp] != [act].[internal_actualColumns]
OR [exp].[includedColumns_inp] != [act].[internal_actualIncludedColumns]
)
;
UPDATE [act]
SET
[act].[isToBeDeleted_comp] = 1 /* flag the actual index "to be deleted" */
FROM @indexesToMaintains [exp] --expected
JOIN @indexesToMaintains [act] --actual
ON [act].[internal_actualColumns] = [exp].[columnsName_inp]
WHERE (
[exp].[columnsName_inp] != [act].[internal_actualColumns]
OR [exp].[includedColumns_inp] != [act].[internal_actualIncludedColumns]
)
;
/* if we have both "rename" and "delete" actions, remove the "rename" action */
UPDATE @indexesToMaintains
SET [isToBeRenamed_comp] = 0
WHERE [isToBeRenamed_comp] = 1
AND [isToBeDeleted_comp] = 1
;
/* ensure that we don't have clash between indexes to create and indexes to rename */
UPDATE ir
SET [ir].[isToBeRenamed_comp] = 0 /* do not rename this index */
, [ir].[isToBeDeleted_inp] = 1 /* drop this index instead, as we have one with the correct structure about to be created */
FROM @indexesToMaintains [ic] /* to create */
JOIN @indexesToMaintains [ir] /* to rename */
ON ic.[expectedIndexName_inp] = ir.[expectedIndexName_inp]
WHERE [ic].[isToBeCreated_comp] = 1
AND [ir].[isToBeRenamed_comp] = 1
/* Show the action matrix */
SELECT [itm].[isIndexFound_comp]
,[itm].[isToBeCreated_comp]
,[itm].[isToBeRenamed_comp]
,[itm].[isToBeDeleted_comp]
,[itm].[isToBeRecreated_comp]
,[itm].[internal_statusMsg]
,'....'
,[itm].[isToBeDeleted_inp]
,[itm].[isToBeRecreated_inp]
,[itm].[indexName]
,[itm].[expectedIndexName_inp]
,[itm].[columnsName_inp]
,[itm].[internal_actualColumns]
,[itm].[includedColumns_inp]
,[itm].[internal_actualIncludedColumns]
FROM @indexesToMaintains [itm]
ORDER BY [itm].[isIndexFound_comp],[itm].[isToBeDeleted_inp], [itm].[columnsName_inp];
/* Drop the indexe(s) that are to be deleted or recreated */
SET @query='';
SELECT @query = @query + 'DROP INDEX '+[itm].[indexName]+' ON dbo.entry;'+CHAR(13)+CHAR(10)
FROM @indexesToMaintains [itm]
WHERE [itm].[isToBeDeleted_comp] = 1
OR [itm].[isToBeRecreated_comp] = 1
;
PRINT REPLICATE('-', 40);
PRINT '-- execute DROP INDEX';
PRINT REPLICATE('-', 40);
PRINT @query;
PRINT REPLICATE('-', 40);
PRINT CHAR(13)+CHAR(10);
IF @DoOnlyOutputStatement = 0
BEGIN
EXECUTE(@query);
END
/* rename existing indexe(s) */
SET @query = '';
SELECT @query = @query + 'EXEC sp_rename @objname ='''+[itm].[tableName]+'.'+[itm].[indexName]+''', @newname = '''+[itm].[expectedIndexName_inp]+''';'+CHAR(13)+CHAR(10)
FROM @indexesToMaintains [itm]
WHERE [itm].[isToBeRenamed_comp] = 1
;
PRINT REPLICATE('-', 40);
PRINT '-- execute sp_rename';
PRINT REPLICATE('-', 40);
PRINT @query;
PRINT REPLICATE('-', 40);
PRINT CHAR(13)+CHAR(10);
IF @DoOnlyOutputStatement = 0
BEGIN
EXECUTE(@query);
END
/* create indexe(s) */
SET @query='';
SELECT @query = @query + 'CREATE '
+CASE WHEN [itm].[isClustered_inp]=1 THEN 'CLUSTERED' ELSE 'NONCLUSTERED' END
+CASE WHEN [itm].[isUnique_inp]=1 THEN ' UNIQUE' ELSE '' END
+' INDEX '+[itm].[expectedIndexName_inp]
+' ON '+[itm].[schemaName]+'.'+[itm].[tableName]+'('+[itm].[columnsName_inp]+')'
+ CASE
WHEN [itm].[includedColumns_inp] IS NOT NULL THEN ' INCLUDE ('+[itm].[includedColumns_inp]+')'
ELSE ''
END
+';'
+CHAR(13)+CHAR(10)
FROM @indexesToMaintains [itm]
WHERE (
[itm].[isToBeCreated_comp] = 1
OR [itm].[isToBeRecreated_comp] = 1
)
;
PRINT REPLICATE('-', 40);
PRINT '-- execute CREATE INDEX';
PRINT REPLICATE('-', 40);
PRINT @query;
PRINT REPLICATE('-', 40);
PRINT CHAR(13)+CHAR(10);
IF @DoOnlyOutputStatement = 0
BEGIN
EXECUTE(@query);
END
--ROLLBACK TRANSACTION;
COMMIT TRANSACTION