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。 
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分类: 数据库
标签: SQL Script正则
原文地址:https://www.cnblogs.com/Leo_wl/p/3017944.html