tsql生成索引创建文本，然后对其求值
我有一个脚本，它根据我们接收到的数据创建和填充一组表 文本文件。将数据加载到SQLServer2008后，我想添加索引。我使用的剪切粘贴创建脚本如下所示 是 TSQL中有一种方法可以创建一个函数，该函数将生成 评估DDL命令？该函数将采用参数 表名、列名和聚集/非聚集。如果有 要成为1列/2列索引的单独函数，我仍然需要 有兴趣 我的设想是：tsql生成索引创建文本，然后对其求值,tsql,Tsql,我有一个脚本，它根据我们接收到的数据创建和填充一组表 文本文件。将数据加载到SQLServer2008后，我想添加索引。我使用的剪切粘贴创建脚本如下所示 是 TSQL中有一种方法可以创建一个函数，该函数将生成 评估DDL命令？该函数将采用参数 表名、列名和聚集/非聚集。如果有 要成为1列/2列索引的单独函数，我仍然需要 有兴趣 我的设想是： hypotheticalFunction('clustered', 'precCdaEarn', 'account', 'seq') hypotherica
hypotheticalFunction('clustered', 'precCdaEarn', 'account', 'seq')
hypothericalFunction('nonClustered', 'flats', 'vendorAcct')
IF(OBJECT_ID('PRC_CREATE_INDEX', N'P') IS NOT NULL)
DROP PROCEDURE PRC_CREATE_INDEX
GO
CREATE PROCEDURE dbo.PRC_CREATE_INDEX
(
-- Table name to add index to
@pTablename AS VARCHAR(120)
-- Index name to add/change
, @pIndexname AS VARCHAR(120)
-- UNIQUE, CLUSTERED or other definition
, @pNewIndexDef AS VARCHAR(255) = ''
-- Columns in index
, @pNewIndexCols AS VARCHAR(255)
-- Recreate even if same
, @pForceRecreate AS SMALLINT = 0
-- Additional columns for INCLUDE
, @pColumnsInclude AS VARCHAR(255) = ''
)
AS
------------------------------------
-- Variabels
------------------------------------
DECLARE @SQL_DROP AS NVARCHAR(1000)
, @SQL_CREATE AS NVARCHAR(1000)
, @retval AS INTEGER
, @rowcount AS INTEGER
DECLARE @oldDescription AS VARCHAR(255)
, @newUnique AS SMALLINT
, @newClustered AS SMALLINT
, @newIndexDef AS VARCHAR(255)
, @newDescription AS VARCHAR(255)
, @drop_index AS BIT
, @temp AS VARCHAR(MAX)
------------------------------------
-- Initiate
------------------------------------
SET XACT_ABORT ON
SET NOCOUNT ON
-- Table exists?
IF(OBJECT_ID(@pTablename) IS NULL)
BEGIN
PRINT 'Error: Table does not exist: ' + @pTablename +
' (' + 'creation of index ''' + @pTablename + '.' + @pIndexname + ''')'
RETURN (1)
END
-----------------------------------------------------------------------------------------------------
-- New index
-----------------------------------------------------------------------------------------------------
-- Initiate (Remove blanks, get unique/clustered info)
SELECT @newIndexDef = @pNewIndexDef
-- Remove NONCLUSTERED
, @newIndexDef = REPLACE(@newIndexDef, 'nonclustered', '')
-- CLUSTERED?
, @newClustered = CASE WHEN PATINDEX('%clustered%', LOWER(@newIndexDef)) > 0 THEN 1 ELSE 0 END
, @newIndexDef = REPLACE(@newIndexDef, 'clustered', '')
-- UNIQUE?
, @newUnique = CASE WHEN PATINDEX('%unique%', LOWER(@pNewIndexDef)) > 0 THEN 1 ELSE 0 END
, @newIndexDef = REPLACE(@newIndexDef, 'unique', '')
-- Remove blanks etc.
, @pNewIndexCols = REPLACE(@pNewIndexCols, ' DESC', '#DESC')
, @newIndexDef = REPLACE(@newIndexDef, ' ', '')
, @newIndexDef = REPLACE(@newIndexDef, ',', '')
, @pNewIndexCols = REPLACE(@pNewIndexCols, ' ', '')
, @pColumnsInclude = REPLACE(@pColumnsInclude, ' ', '')
-- Correct defintion?
IF LEN(@newIndexDef) > 0
BEGIN
RAISERROR ('Index defintion ''%s'' is incorrect for index ''%s.%s''!', 11, 11, @pNewIndexDef, @pTablename, @pIndexname)
RETURN (1)
END
IF @newClustered = 1 AND LEN(@pColumnsInclude) > 0
BEGIN
RAISERROR ('Cannot specify included columns for a clustered index (''%s.%s'')!', 11, 11, @pIndexname, @pTablename)
RETURN (1)
END
IF @pNewIndexCols LIKE '%#DESC%'
BEGIN
RAISERROR ('Descending sort direction not supported (''%s.%s'')!', 11, 11, @pTablename, @pIndexname)
RETURN (1)
END
IF @newClustered = 1 AND EXISTS
(
SELECT 1
FROM sys.indexes (NOLOCK)
WHERE object_id = OBJECT_ID(@pTablename, N'U')
AND name <> @pIndexname
AND type = 1 -- CLUSTERED
AND is_hypothetical = 0
)
BEGIN
SELECT @temp = name
FROM sys.indexes (NOLOCK)
WHERE object_id = OBJECT_ID(@pTablename, N'U')
AND name <> @pIndexname
AND type = 1 -- CLUSTERED
AND is_hypothetical = 0
RAISERROR ('Cannot add CLUSTERED index (''%s.%s'') - table already has a clustered index (''%s'')!', 11, 11, @pTablename, @pIndexname, @temp)
RETURN (1)
END
-- Prepare SQL
-- CREATE
SELECT @SQL_CREATE = ''
+ 'CREATE '
+ CASE WHEN @newUnique = 1 THEN 'UNIQUE ' ELSE '' END
+ CASE WHEN @newClustered = 1 THEN 'CLUSTERED ' ELSE 'NONCLUSTERED ' END
+ 'INDEX ' + @pIndexname + ' '
+ 'ON ' + @pTablename + ' '
+ '(' + @pNewIndexCols + ')'
+ CASE WHEN LEN(@pColumnsInclude) > 0 THEN ' INCLUDE (' + @pColumnsInclude + ')' ELSE '' END
-- Description
SELECT @newDescription = ''
+ CASE WHEN @newUnique = 1 THEN 'UNIQUE ' ELSE '' END
+ CASE WHEN @newClustered = 1 THEN 'CLUSTERED ' ELSE 'NONCLUSTERED ' END
+ '(' + @pNewIndexCols + ')'
+ CASE WHEN LEN(@pColumnsInclude) > 0 THEN ' INCLUDE (' + @pColumnsInclude + ')' ELSE '' END
-- DROP
SET @SQL_DROP = ''
+ 'DROP INDEX ' + @pTablename
+ '.' + @pIndexname
-----------------------------------------------------------------------------------------------------
-- Current index
-----------------------------------------------------------------------------------------------------
-- Initiate
SELECT @drop_index = 0
-- Get definition/description and check if recreation is needed
IF EXISTS
(
SELECT 1
FROM sys.indexes (NOLOCK)
WHERE object_id = OBJECT_ID(@pTablename, N'U')
AND name = @pIndexname
)
BEGIN
-- Description
SELECT @oldDescription = ''
+ CASE WHEN i.is_unique = 1 THEN 'UNIQUE ' ELSE '' END
+ CASE
WHEN i.type = 1 THEN 'CLUSTERED '
WHEN i.type = 2 THEN 'NONCLUSTERED '
ELSE '? '
END
+ '(' + STUFF(
(
SELECT ',' + COL_NAME(ic.object_id, ic.column_id)
FROM sys.index_columns ic (NOLOCK)
WHERE ic.object_id = i.object_id
AND ic.index_id = i.index_id
AND ic.is_included_column = 0
ORDER BY ic.key_ordinal
FOR XML PATH('')
)
, 1, 1, '') + ')'
+ ISNULL(' INCLUDE (' + STUFF(
(
SELECT ',' + COL_NAME(ic.object_id, ic.column_id)
FROM sys.index_columns ic (NOLOCK)
WHERE ic.object_id = i.object_id
AND ic.index_id = i.index_id
AND ic.is_included_column = 1
ORDER BY ic.index_column_id -- Or column_id???
FOR XML PATH('')
)
, 1, 1, '') + ')', '')
FROM sys.indexes i (NOLOCK)
WHERE i.object_id = OBJECT_ID(@pTablename, N'U')
AND i.name = @pIndexname
-- Exit?
-- If not changed and no force of recreation
IF @oldDescription = @newDescription
AND
@pForceRecreate = 0
BEGIN
RETURN 0
END
-- We should drop current index..
SET @drop_index = 1
END
-----------------------------------------------------------------------------------------------------
-- Execute SQL
-----------------------------------------------------------------------------------------------------
-- Exec
IF @drop_index = 1
EXEC sp_executesql @SQL_DROP
IF LEN(@pNewIndexCols) > 0
EXEC sp_executesql @SQL_CREATE
-- Message
IF LEN(@pNewIndexCols) > 0 AND @drop_index = 0
PRINT 'Created index ' + @pTablename + '.' + @pIndexname + ' (' + @newDescription + ')'
ELSE IF LEN(@pNewIndexCols) > 0 AND @drop_index = 1
PRINT 'Recreated index ' + @pTablename + '.' + @pIndexname + CHAR(10) +
' From: ' + @oldDescription + CHAR(10) +
' To: ' + @newDescription
-- Well, this will perhaps occur when and if this proc is changed...
ELSE IF @drop_index = 1
PRINT 'Removed index ' + @pTablename + '.' + @pIndexname + ' (' + @oldDescription + ')'
-----------------------------------------------------------------------------------------------------
-- Exit
-----------------------------------------------------------------------------------------------------
RETURN (0)
GO
IF EXISTS (Select 'X'
FROM sysindexes
WHERE id = (SELECT OBJECT_ID('precCdaEarn'))
and name = 'idx_account_seq')
DROP index precCdaEarn.idx_account_seq
Create nonclustered index idx_account_seq
ON precCdaEarn(account, seq)
当然，您不能为此创建函数，但是使用存储过程不会有问题 比如：
hypotheticalFunction('clustered', 'precCdaEarn', 'account', 'seq')
hypothericalFunction('nonClustered', 'flats', 'vendorAcct')
IF(OBJECT_ID('PRC_CREATE_INDEX', N'P') IS NOT NULL)
DROP PROCEDURE PRC_CREATE_INDEX
GO
CREATE PROCEDURE dbo.PRC_CREATE_INDEX
(
-- Table name to add index to
@pTablename AS VARCHAR(120)
-- Index name to add/change
, @pIndexname AS VARCHAR(120)
-- UNIQUE, CLUSTERED or other definition
, @pNewIndexDef AS VARCHAR(255) = ''
-- Columns in index
, @pNewIndexCols AS VARCHAR(255)
-- Recreate even if same
, @pForceRecreate AS SMALLINT = 0
-- Additional columns for INCLUDE
, @pColumnsInclude AS VARCHAR(255) = ''
)
AS
------------------------------------
-- Variabels
------------------------------------
DECLARE @SQL_DROP AS NVARCHAR(1000)
, @SQL_CREATE AS NVARCHAR(1000)
, @retval AS INTEGER
, @rowcount AS INTEGER
DECLARE @oldDescription AS VARCHAR(255)
, @newUnique AS SMALLINT
, @newClustered AS SMALLINT
, @newIndexDef AS VARCHAR(255)
, @newDescription AS VARCHAR(255)
, @drop_index AS BIT
, @temp AS VARCHAR(MAX)
------------------------------------
-- Initiate
------------------------------------
SET XACT_ABORT ON
SET NOCOUNT ON
-- Table exists?
IF(OBJECT_ID(@pTablename) IS NULL)
BEGIN
PRINT 'Error: Table does not exist: ' + @pTablename +
' (' + 'creation of index ''' + @pTablename + '.' + @pIndexname + ''')'
RETURN (1)
END
-----------------------------------------------------------------------------------------------------
-- New index
-----------------------------------------------------------------------------------------------------
-- Initiate (Remove blanks, get unique/clustered info)
SELECT @newIndexDef = @pNewIndexDef
-- Remove NONCLUSTERED
, @newIndexDef = REPLACE(@newIndexDef, 'nonclustered', '')
-- CLUSTERED?
, @newClustered = CASE WHEN PATINDEX('%clustered%', LOWER(@newIndexDef)) > 0 THEN 1 ELSE 0 END
, @newIndexDef = REPLACE(@newIndexDef, 'clustered', '')
-- UNIQUE?
, @newUnique = CASE WHEN PATINDEX('%unique%', LOWER(@pNewIndexDef)) > 0 THEN 1 ELSE 0 END
, @newIndexDef = REPLACE(@newIndexDef, 'unique', '')
-- Remove blanks etc.
, @pNewIndexCols = REPLACE(@pNewIndexCols, ' DESC', '#DESC')
, @newIndexDef = REPLACE(@newIndexDef, ' ', '')
, @newIndexDef = REPLACE(@newIndexDef, ',', '')
, @pNewIndexCols = REPLACE(@pNewIndexCols, ' ', '')
, @pColumnsInclude = REPLACE(@pColumnsInclude, ' ', '')
-- Correct defintion?
IF LEN(@newIndexDef) > 0
BEGIN
RAISERROR ('Index defintion ''%s'' is incorrect for index ''%s.%s''!', 11, 11, @pNewIndexDef, @pTablename, @pIndexname)
RETURN (1)
END
IF @newClustered = 1 AND LEN(@pColumnsInclude) > 0
BEGIN
RAISERROR ('Cannot specify included columns for a clustered index (''%s.%s'')!', 11, 11, @pIndexname, @pTablename)
RETURN (1)
END
IF @pNewIndexCols LIKE '%#DESC%'
BEGIN
RAISERROR ('Descending sort direction not supported (''%s.%s'')!', 11, 11, @pTablename, @pIndexname)
RETURN (1)
END
IF @newClustered = 1 AND EXISTS
(
SELECT 1
FROM sys.indexes (NOLOCK)
WHERE object_id = OBJECT_ID(@pTablename, N'U')
AND name <> @pIndexname
AND type = 1 -- CLUSTERED
AND is_hypothetical = 0
)
BEGIN
SELECT @temp = name
FROM sys.indexes (NOLOCK)
WHERE object_id = OBJECT_ID(@pTablename, N'U')
AND name <> @pIndexname
AND type = 1 -- CLUSTERED
AND is_hypothetical = 0
RAISERROR ('Cannot add CLUSTERED index (''%s.%s'') - table already has a clustered index (''%s'')!', 11, 11, @pTablename, @pIndexname, @temp)
RETURN (1)
END
-- Prepare SQL
-- CREATE
SELECT @SQL_CREATE = ''
+ 'CREATE '
+ CASE WHEN @newUnique = 1 THEN 'UNIQUE ' ELSE '' END
+ CASE WHEN @newClustered = 1 THEN 'CLUSTERED ' ELSE 'NONCLUSTERED ' END
+ 'INDEX ' + @pIndexname + ' '
+ 'ON ' + @pTablename + ' '
+ '(' + @pNewIndexCols + ')'
+ CASE WHEN LEN(@pColumnsInclude) > 0 THEN ' INCLUDE (' + @pColumnsInclude + ')' ELSE '' END
-- Description
SELECT @newDescription = ''
+ CASE WHEN @newUnique = 1 THEN 'UNIQUE ' ELSE '' END
+ CASE WHEN @newClustered = 1 THEN 'CLUSTERED ' ELSE 'NONCLUSTERED ' END
+ '(' + @pNewIndexCols + ')'
+ CASE WHEN LEN(@pColumnsInclude) > 0 THEN ' INCLUDE (' + @pColumnsInclude + ')' ELSE '' END
-- DROP
SET @SQL_DROP = ''
+ 'DROP INDEX ' + @pTablename
+ '.' + @pIndexname
-----------------------------------------------------------------------------------------------------
-- Current index
-----------------------------------------------------------------------------------------------------
-- Initiate
SELECT @drop_index = 0
-- Get definition/description and check if recreation is needed
IF EXISTS
(
SELECT 1
FROM sys.indexes (NOLOCK)
WHERE object_id = OBJECT_ID(@pTablename, N'U')
AND name = @pIndexname
)
BEGIN
-- Description
SELECT @oldDescription = ''
+ CASE WHEN i.is_unique = 1 THEN 'UNIQUE ' ELSE '' END
+ CASE
WHEN i.type = 1 THEN 'CLUSTERED '
WHEN i.type = 2 THEN 'NONCLUSTERED '
ELSE '? '
END
+ '(' + STUFF(
(
SELECT ',' + COL_NAME(ic.object_id, ic.column_id)
FROM sys.index_columns ic (NOLOCK)
WHERE ic.object_id = i.object_id
AND ic.index_id = i.index_id
AND ic.is_included_column = 0
ORDER BY ic.key_ordinal
FOR XML PATH('')
)
, 1, 1, '') + ')'
+ ISNULL(' INCLUDE (' + STUFF(
(
SELECT ',' + COL_NAME(ic.object_id, ic.column_id)
FROM sys.index_columns ic (NOLOCK)
WHERE ic.object_id = i.object_id
AND ic.index_id = i.index_id
AND ic.is_included_column = 1
ORDER BY ic.index_column_id -- Or column_id???
FOR XML PATH('')
)
, 1, 1, '') + ')', '')
FROM sys.indexes i (NOLOCK)
WHERE i.object_id = OBJECT_ID(@pTablename, N'U')
AND i.name = @pIndexname
-- Exit?
-- If not changed and no force of recreation
IF @oldDescription = @newDescription
AND
@pForceRecreate = 0
BEGIN
RETURN 0
END
-- We should drop current index..
SET @drop_index = 1
END
-----------------------------------------------------------------------------------------------------
-- Execute SQL
-----------------------------------------------------------------------------------------------------
-- Exec
IF @drop_index = 1
EXEC sp_executesql @SQL_DROP
IF LEN(@pNewIndexCols) > 0
EXEC sp_executesql @SQL_CREATE
-- Message
IF LEN(@pNewIndexCols) > 0 AND @drop_index = 0
PRINT 'Created index ' + @pTablename + '.' + @pIndexname + ' (' + @newDescription + ')'
ELSE IF LEN(@pNewIndexCols) > 0 AND @drop_index = 1
PRINT 'Recreated index ' + @pTablename + '.' + @pIndexname + CHAR(10) +
' From: ' + @oldDescription + CHAR(10) +
' To: ' + @newDescription
-- Well, this will perhaps occur when and if this proc is changed...
ELSE IF @drop_index = 1
PRINT 'Removed index ' + @pTablename + '.' + @pIndexname + ' (' + @oldDescription + ')'
-----------------------------------------------------------------------------------------------------
-- Exit
-----------------------------------------------------------------------------------------------------
RETURN (0)
GO
哇，太慷慨了，我希望你自己也能用上。我每年做12-20个项目，将其他供应商的数据库转换为我们产品的数据库，并使用sql server准备数据。我可能会在每个项目中使用这个。如果我有什么要补充的，我会在这里提到，因为现在它正是我想要的。谢谢。除了我剥去了一些私人的部分，它被广泛使用；）