批量部署SQL script验证
2013-04-12 18:45 by AceYue, 407 阅读, 0 评论, 收藏 , 编辑
每天的批量部署SQL script难免会出现一些小差错,为了避免某些常见而又容易忽略的错误的出现,我们在执行前先将脚本过滤一遍,通过一些关键字来提示是否出现了不符合的设置。
本实例以创建表和给表怎加列不容许出现null列以及在执行脚本过程中不容许出现设置SET ANSI_PADDING OFF为例,利用正则获取脚本中的关键字,以检索是否符合要求。
完成这个任务我们的主要挑战是如何获取sql 脚本中的关键字,如创建新table时,我们如何判断出那一段脚本是字段列,这里就需要用的正则来提取出关键字。来看看通常创建表的脚本:
CREATE TABLE [dbo].[A](
[EmployerID] [ int ] NOT NULL ,
[InvoiceItemID] [ int ] NOT NULL
) ON [ PRIMARY ]
GO
像这样的语句结构我们只需要提取出“CREATE TABLE [dbo].[A](” 与“) ON [PRIMARY] GO”之间的语句然后用‘,’分割出每个字段,即可判断是否有“NOT NULL”关键字。
但是事与愿违,我们穿件一个表可能面临着更多的情况,比如需要设置主键:
create table Ace
(
AceID int ,
AceName nvarchar(20),
CONSTRAINT [PK_Billing_SalesInvoice_Item] PRIMARY KEY CLUSTERED
(
AceID ASC
) WITH (PAD_INDEX = OFF , STATISTICS_NORECOMPUTE = OFF , IGNORE_DUP_KEY = OFF , ALLOW_ROW_LOCKS = ON , ALLOW_PAGE_LOCKS = ON ) ON [ PRIMARY ]
) ON [ PRIMARY ]
很明显这个脚本中,我们要提取的就是“Create table Ace (” 与 “CONSTRAINT” 之间的内容了。所以处理起来就需要分情况而定。下面来看我的处理:
/// <summary>
/// Check exists "NOT NULL" when create table.
/// </summary>
/// Author: Ace Yue
/// Date:2013-04-08
/// <param name="sqlScript">the sql script</param>
protected void CheckNullableWhenCreate( string sqlScript)
{
string sCreateBegin = @"\s?create\s+table\s+((dbo.)?|(\[dbo\].)?)(\[?)([a-z]+[_,a-z0-9]*(\]?))(\s*)(\()(\s*)" ; //Get the script start when create new table.
Regex regCheck = new Regex(sCreateBegin);
if (regCheck.IsMatch(sqlScript))
{
int iSplitStart = sqlScript.IndexOf(regCheck.Match(sqlScript).Value);
int iSplitEnd = 0;
string sSplit = sqlScript.Substring(iSplitStart + regCheck.Match(sqlScript).Value.Length); //Capture the script behind the table's name.
string sEndGeneral = @"(\s*)(?<![0-9])(\){1})" ; // get the ")" but not in "(10)"
string sEndSpecific = @"(\,\s*)(constraint)(\s+)((\[?)[a-z]+[_,a-z0-9]*(\]?))(\s+)(primary)(\s+)(key)(\s+)(clustered)" ; //Get the "CONSTRAINT" when the script contain "CONSTRAINT".
Regex regEndGeneral = new Regex(sEndGeneral);
Regex regEndSpecific = new Regex(sEndSpecific);
if (regEndSpecific.IsMatch(sSplit))
iSplitEnd = sSplit.IndexOf(regEndSpecific.Match(sSplit).Value);
else if (regEndGeneral.IsMatch(sSplit))
iSplitEnd = sSplit.IndexOf(regEndGeneral.Match(sSplit).Value);
else
iSplitEnd = sSplit.Length;
sSplit = sSplit.Substring(0, iSplitEnd);
string [] arrScript = sSplit.Split( ',' );
string sExistsNotNull = @"(\s+)(not)(\s+)(null)(\s*)" ;
Regex regExistsNotNull = new Regex(sExistsNotNull);
foreach ( string sItem in arrScript)
{
if (!regExistsNotNull.IsMatch(sItem))
{
this .bPass = false ;
this .SReturn += "The SQL script not contain \"NOT NULL\" in some column when create table. Do you want continue ? \r\n" ;
}
}
}
}
下面来看看Alter表的情况:
ALTER TABLE dbo.Billing_Plan_Payment_Bank_Log
Add InvoiceReference1 NVarChar(100) NOT NULL CONSTRAINT
DF_Billing_Plan_Payment_Bank_Log_InvoiceReference1 DEFAULT '' ,
InvoiceReference2 NVarChar(100) NOT NULL CONSTRAINT
DF_Billing_Plan_Payment_Bank_Log_InvoiceReference2 DEFAULT '' ,
InvoiceReference3 NVarChar(100) NOT NULL CONSTRAINT
DF_Billing_Plan_Payment_Bank_Log_InvoiceReference3 DEFAULT ''
Go
处理的方面与上述情况类似,我们需要提取想要的东西就可以了:
/// <summary>
/// Check the script exists "NOT NULL" when Alter table add columns.
/// </summary>
/// Author: Ace Yue
/// Date:2013-04-08
/// <param name="sqlScript">the sql script</param>
protected void CheckNullableWhenAlter( string sqlScript)
{
string sAlterBegin = @"(\s*)(alter)(\s+)(table)(\s+)((dbo.)?|(\[dbo\].)?)(\[?)([a-z]+[_,a-z0-9]*(\]?))(\s+)(add)(\s+)" ; // Get the script begin when alter table. like "ALTER TABLE dbo.Billing_Plan_Payment_Bank_Log Add"
Regex regCheck = new Regex(sAlterBegin);
if (regCheck.IsMatch(sqlScript))
{
int iSplitStart = sqlScript.IndexOf(regCheck.Match(sqlScript).Value);
string sSplit = sqlScript.Substring(iSplitStart + regCheck.Match(sqlScript).Value.Length);
string sAlterEnd = @"(\s+)((go\s+)|(go$))" ;
Regex regEnd = new Regex(sAlterEnd);
int iSplitEnd = 0;
if (regEnd.IsMatch(sSplit))
iSplitEnd = sSplit.IndexOf(regEnd.Match(sSplit).Value);
else
iSplitEnd = sSplit.Length;
sSplit = sSplit.Substring(0, iSplitEnd);
string [] arrScript = sSplit.Split( ',' );
string sExistsNotNull = @"(\s+)(not)(\s+)(null)(\s*)" ;
Regex regExistsNotNull = new Regex(sExistsNotNull);
foreach ( string sItem in arrScript)
{
if (!regExistsNotNull.IsMatch(sItem))
{
this .bPass = false ;
this .SReturn += "The SQL script not contain \"NOT NULL\" in some column when add new column. Do you want continue ? \r\n" ;
}
}
}
}
处理SET ANSI_PADDING OFF 这个就是太简单了,主需要查出就可以了:
/// <summary>
/// Check the Script is contain "Set ANSI OFF" when
/// </summary>
/// Author: Ace Yue
/// Date:2013-04-08
/// <param name="sqlScript">The SQL Script whose you want to check</param>
protected void CheckANSI( string sqlScript)
{
Regex reg = new Regex( @"set\s+ansi_padding{1}\s+(off\s+|off$)" ); // Is there have "SET ANSI_PADDING OFF"
if (reg.IsMatch(sqlScript))
{
this .BPass = false ;
this .SReturn += "This SQL script contain \"SET ANSI_PADDING OFF\". Do you want to continue?\r\n" ;
}
}
到了这里我们的任务就完成了,下面是我的完整Demo:
看看运行结果:
由于正则表达式我是现学现卖,并不能保证对所有情况都考虑到,如果有遗漏欢迎提出来,谢谢!
本文出处: http://www.cnblogs.com/aces/
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接。
请关注我的个人博客: www.afire.com.cn
分类: 数据库
标签: SQL Script , 正则
作者: Leo_wl
出处: http://www.cnblogs.com/Leo_wl/
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。
版权信息查看更多关于批量部署SQL script验证的详细内容...