Sql server 2005 查询信息时出现死锁\u架构
我有一个进程,它根据已发布元数据层中的更改动态地改变我的SQL2K5表结构 例如,如果需要添加一个新列,并且该表没有依赖项,则步骤如下: 1.使用T-SQL为表中已经存在的任何索引和主键创建脚本[这些脚本包括在下面] 2.放下桌子 3.从具有新列的元层重新创建表 4.执行步骤#1中创建的脚本 5.使用BulkCopy填充表 以上内容通过.NET程序集启动,每天在3个并发流中运行 我在步骤#1中收到一个死锁错误-当我访问信息#模式表以编写索引/键的脚本时。我在这些脚本中使用了带有(NOLOCK)的提示,认为当这些操作的3个流同时运行时,这应该可以防止任何锁定。一个表只能在一个流中处理(创建或脚本) 还有什么我需要做的吗 非常感谢您的评论 [脚本]Sql server 2005 查询信息时出现死锁\u架构,sql-server-2005,tsql,Sql Server 2005,Tsql,我有一个进程,它根据已发布元数据层中的更改动态地改变我的SQL2K5表结构 例如,如果需要添加一个新列,并且该表没有依赖项,则步骤如下: 1.使用T-SQL为表中已经存在的任何索引和主键创建脚本[这些脚本包括在下面] 2.放下桌子 3.从具有新列的元层重新创建表 4.执行步骤#1中创建的脚本 5.使用BulkCopy填充表 以上内容通过.NET程序集启动,每天在3个并发流中运行 我在步骤#1中收到一个死锁错误-当我访问信息#模式表以编写索引/键的脚本时。我在这些脚本中使用了带有(NOLOCK)的
ALTER Procedure [dbo].[s$spScriptPrimaryKeyForTable]
@Tablename varchar(100)
AS
-- Get all existing primary keys
DECLARE cPK CURSOR FOR
SELECT TABLE_NAME, CONSTRAINT_NAME
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WITH(NOLOCK)
WHERE upper(TABLE_NAME)=upper(@Tablename)
ORDER BY TABLE_NAME
DECLARE @PkTable SYSNAME
DECLARE @PkName SYSNAME
-- Loop through all the primary keys
OPEN cPK
FETCH NEXT FROM cPK INTO @PkTable, @PkName
WHILE (@@FETCH_STATUS = 0)
BEGIN
DECLARE @PKSQL NVARCHAR(4000) SET @PKSQL = ''
SET @PKSQL = 'ALTER TABLE ' + @PkTable + ' ADD CONSTRAINT ' + @PkName + ' PRIMARY KEY CLUSTERED ('
-- Get all columns for the current primary key
DECLARE cPKColumn CURSOR FOR
SELECT COLUMN_NAME
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WITH(NOLOCK)
WHERE TABLE_NAME = @PkTable AND CONSTRAINT_NAME = @PkName
ORDER BY ORDINAL_POSITION
OPEN cPKColumn
DECLARE @PkColumn SYSNAME
DECLARE @PkFirstColumn BIT SET @PkFirstColumn = 1
-- Loop through all columns and append the sql statement
FETCH NEXT FROM cPKColumn INTO @PkColumn
WHILE (@@FETCH_STATUS = 0)
BEGIN
IF (@PkFirstColumn = 1)
SET @PkFirstColumn = 0
ELSE
SET @PKSQL = @PKSQL + ', '
SET @PKSQL = @PKSQL + @PkColumn
FETCH NEXT FROM cPKColumn INTO @PkColumn
END
CLOSE cPKColumn
DEALLOCATE cPKColumn
SET @PKSQL = @PKSQL + ')'
-- Print the primary key statement
-- PRINT @PKSQL
FETCH NEXT FROM cPK INTO @PkTable, @PkName
END
CLOSE cPK
DEALLOCATE cPK
SELECT ISNULL(@PKSQL,' ')
================
ALTER Procedure [dbo].[s$spScriptIndexesForTable]
@Tablename varchar(100)
AS
DECLARE @RetVal varchar(4000)
SET @RetVal = ''
-- Get all existing indexes, but NOT the primary keys
DECLARE cIX CURSOR FOR
SELECT OBJECT_NAME(SI.Object_ID), SI.Object_ID, SI.Name, SI.Index_ID
FROM Sys.Indexes SI WITH(NOLOCK)
LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC WITH(NOLOCK) ON SI.Name = TC.CONSTRAINT_NAME AND OBJECT_NAME(SI.Object_ID) = TC.TABLE_NAME
WHERE TC.CONSTRAINT_NAME IS NULL
AND OBJECTPROPERTY(SI.Object_ID, 'IsUserTable') = 1
AND upper(OBJECT_NAME(SI.Object_ID))=upper(@Tablename)
ORDER BY OBJECT_NAME(SI.Object_ID), SI.Index_ID
DECLARE @IxTable SYSNAME
DECLARE @IxTableID INT
DECLARE @IxName SYSNAME
DECLARE @IxID INT
-- Loop through all indexes
OPEN cIX
FETCH NEXT FROM cIX INTO @IxTable, @IxTableID, @IxName, @IxID
WHILE (@@FETCH_STATUS = 0)
BEGIN
DECLARE @IXSQL NVARCHAR(4000)
--SET @PKSQL = ''
SET @IXSQL = 'CREATE '
-- Check if the index is unique
IF (INDEXPROPERTY(@IxTableID, @IxName, 'IsUnique') = 1)
SET @IXSQL = @IXSQL + 'UNIQUE '
-- Check if the index is clustered
IF (INDEXPROPERTY(@IxTableID, @IxName, 'IsClustered') = 1)
SET @IXSQL = @IXSQL + 'CLUSTERED '
SET @IXSQL = @IXSQL + 'INDEX ' + @IxName + ' ON [' + @IxTable + '] ('
-- Get all columns of the index
DECLARE cIxColumn CURSOR FOR
SELECT SC.Name,IC.[is_included_column],IC.is_descending_key
FROM Sys.Index_Columns IC WITH(NOLOCK)
JOIN Sys.Columns SC WITH(NOLOCK) ON IC.Object_ID = SC.Object_ID AND IC.Column_ID = SC.Column_ID
WHERE IC.Object_ID = @IxTableID AND Index_ID = @IxID
ORDER BY IC.Index_Column_ID,IC.is_included_column
DECLARE @IxColumn SYSNAME
DECLARE @IxIncl bit
DECLARE @Desc bit
DECLARE @IxIsIncl bit set @IxIsIncl = 0
DECLARE @IxFirstColumn BIT SET @IxFirstColumn = 1
-- Loop throug all columns of the index and append them to the CREATE statement
OPEN cIxColumn
FETCH NEXT FROM cIxColumn INTO @IxColumn, @IxIncl, @Desc
WHILE (@@FETCH_STATUS = 0)
BEGIN
IF (@IxFirstColumn = 1)
BEGIN
SET @IxFirstColumn = 0
END
ELSE
BEGIN
--check to see if it's an included column
IF ((@IxIsIncl = 0) AND (@IxIncl = 1))
BEGIN
SET @IxIsIncl = 1
SET @IXSQL = @IXSQL + ') INCLUDE ('
END
ELSE
BEGIN
SET @IXSQL = @IXSQL + ', '
END
END
SET @IXSQL = @IXSQL + '[' + @IxColumn + ']'
--check to see if it's DESC
IF @Desc = 1
SET @IXSQL = @IXSQL + ' DESC'
FETCH NEXT FROM cIxColumn INTO @IxColumn, @IxIncl, @Desc
END
CLOSE cIxColumn
DEALLOCATE cIxColumn
SET @IXSQL = @IXSQL + ')'
-- Print out the CREATE statement for the index
--SELECT 'IXSQL: ' + @IXSQL
IF @RetVal IS NULL
SET @RetVal = ''
--SELECT 'Retval: ' + @RetVal
SET @RetVal = @RetVal + @IXSQL + ' '
FETCH NEXT FROM cIX INTO @IxTable, @IxTableID, @IxName, @IxID
END
CLOSE cIX
DEALLOCATE cIX
SELECT ISNULL(@RetVal,' ')
CREATE PROCEDURE dbo.ScriptPKForTable
@TableName SYSNAME
AS
BEGIN
SET NOCOUNT ON;
DECLARE
@pkName SYSNAME,
@clustered BIT,
@object_id INT,
@sql NVARCHAR(MAX);
SELECT
@object_id = OBJECT_ID(UPPER(@TableName));
SELECT
@pkName = kc.name,
@clustered = CASE i.[type]
WHEN 1 THEN 1 ELSE 0 END
FROM
sys.key_constraints AS kc
INNER JOIN
sys.indexes AS i
ON kc.parent_object_id = i.[object_id]
AND kc.unique_index_id = i.index_id
WHERE
kc.parent_object_id = @object_id
AND kc.[type] = 'pk';
SET @sql = N'ALTER TABLE ' + QUOTENAME(@TableName)
+ ' ADD CONSTRAINT ' + @pkName
+ ' PRIMARY KEY ' + CASE @clustered
WHEN 1 THEN 'CLUSTERED' ELSE '' END + ' (';
SELECT
@sql = @sql + c.name + ','
FROM
sys.index_columns AS ic
INNER JOIN
sys.indexes AS i
ON ic.index_id = i.index_id
AND ic.[object_id] = i.[object_id]
INNER JOIN
sys.key_constraints AS kc
ON i.[object_id] = kc.[parent_object_id]
AND kc.unique_index_id = i.index_id
INNER JOIN
sys.columns AS c
ON i.[object_id] = c.[object_id]
AND ic.column_id = c.column_id
WHERE
kc.[type] = 'PK'
AND kc.parent_object_id = @object_id
ORDER BY key_ordinal;
SET @sql = LEFT(@sql, LEN(@sql) - 1) + ');';
SELECT COALESCE(@sql, ' ');
END
GO
CREATE FUNCTION dbo.BuildIndexColumns
(
@object_id INT,
@index_id INT,
@included_columns BIT
)
RETURNS NVARCHAR(MAX)
AS
BEGIN
DECLARE @s NVARCHAR(MAX);
SELECT @s = N'';
SELECT @s = @s + c.name + CASE ic.is_descending_key
WHEN 1 THEN ' DESC' ELSE '' END + ','
FROM sys.index_columns AS ic
INNER JOIN sys.columns AS c
ON ic.[object_id] = c.[object_id]
AND ic.column_id = c.column_id
WHERE c.[object_id] = @object_id
AND ic.[object_id] = @object_id
AND ic.index_id = @index_id
AND ic.is_included_column = @included_columns
ORDER BY ic.key_ordinal;
IF @s > N''
SET @s = LEFT(@s, LEN(@s)-1);
RETURN (NULLIF(@s, N''));
END
GO
有了该函数,ScriptIndexes过程非常简单:
CREATE PROCEDURE dbo.ScriptIndexesForTable
@TableName SYSNAME
AS
BEGIN
SET NOCOUNT ON;
DECLARE
@sql NVARCHAR(MAX),
@object_id INT;
SELECT @sql = N'', @object_id = OBJECT_ID(UPPER(@TableName));
SELECT @sql = @sql + 'CREATE '
+ CASE i.is_unique WHEN 1 THEN 'UNIQUE ' ELSE '' END
+ CASE i.[type] WHEN 1 THEN 'CLUSTERED ' ELSE '' END
+ ' INDEX ' + i.name + ' ON ' + QUOTENAME(@TableName) + ' ('
+ dbo.BuildIndexColumns(@object_id, i.index_id, 0)
+ ')' + COALESCE(' INCLUDE('
+ dbo.BuildIndexColumns(@object_id, i.index_id, 1)
+ ')', '') + ';' + CHAR(13) + CHAR(10)
FROM
sys.indexes AS i
WHERE
i.[object_id] = @object_id
-- since this will be covered by ScriptPKForTable:
AND i.is_primary_key = 0
ORDER BY i.index_id;
SELECT COALESCE(@sql, ' ');
END
GO
请注意,我的解决方案并不假定PK是集群的(PK脚本硬代码是集群的,但索引脚本假定任何索引都可以集群)。我也会忽略其他属性,如文件组、分区或筛选索引(2005年无论如何都不支持)。哪个过程导致死锁,是编写主键脚本的过程,还是编写索引脚本的过程?为什么要使用信息模式、INDEXPROPERTY等,而不是sys.key约束、sys.index列、sys.index.is集群等?感谢您的评论和脚本!(我很想看看您的索引创建脚本)错误源于脚本过程,而不是创建/更改表的过程-如果您确信调用这些视图不会产生影响,这听起来确实很奇怪。但是,我无法从日志中判断它是在调用索引还是主键存储过程中爆炸。当我构建创建表脚本时,我从以下内容开始:“construct SQL tsql=“USE[”&info.SQLServerDestDatabase&“]”和vbNewLine tsql&=“SET ANSI_NULLS on”&vbNewLine tsql&=“在”&vbNewLine tsql&=“创建表[dbo]。”&info.SQLServerDestTableName&“](&vbNewLine…然后我只需使用:SqlHelper.ExecuteNonQuery(sqlConnString,CommandType.Text,tsql)执行语句即可我能做些什么来防止僵局发展到这一点吗?再一次,我在你的评论中没有看到任何会大喊“僵局!僵局!”您必须更准确地确定它,而不仅仅是猜测脚本的哪一部分导致死锁。在这两种情况下,您的存储过程都只是在构建游标后运行一个SELECT,因此它必须在其他位置(我怀疑在您调用过程后)。首先要做的是修复你的游标…好的-我已经打开了1222跟踪。希望我们能从中获得更多信息。谢谢Aaron。我已经更新了我的答案,包含了一个为给定表生成索引创建脚本的过程(附带一些注意事项,以及用于为键和包含列构建每个列列表的配套函数)。