小编典典

在C#中执行包含GO语句的SQL批处理

sql

我正在尝试构建一个程序,该程序以错误处理方式批量执行sql语句(因此,我不使用SMO)。

问题在于 GO 不是SQL的一部分,并且在使用.NET执行语句时,它最终会出现错误(SMO会处理该错误,但不提供执行是否失败的任何指示)。

string statements = File.ReadAllText("c:\\test.sql");
string[] splitted = statements.split("GO");

由于 GO 关键字也可以放在注释中(我不想从语句中删除注释),并且注释可以出现在/ ** /或两个破折号之后,因此使用上述行不能解决我的问题。-
例如,我不希望解析以下代码:

/*
GO
*/

(我用谷歌搜索它,但那边没有解决方案)


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2021-03-17

共1个答案

小编典典

ScriptDom

最简单(也是最可靠)的解决方案是使用T-SQL解析器。好消息是您不必编写它,只需添加对以下内容的引用:

  • Microsoft.Data.Schema.ScriptDom
  • Microsoft.Data.Schema.ScriptDom.Sql

然后使用代码:

static void Main(string[] args)
{
    string sql = @"
/* 
GO
*/ 
SELECT * FROM [table]

GO

SELECT * FROM [table]
SELECT * FROM [table]

GO

SELECT * FROM [table]";

    string[] errors;
    var scriptFragment = Parse(sql, SqlVersion.Sql100, true, out errors);
    if (errors != null)
    {
        foreach (string error in errors)
        {
            Console.WriteLine(error);
            return;
        }
    }

    TSqlScript tsqlScriptFragment = scriptFragment as TSqlScript;
    if (tsqlScriptFragment == null)
        return;

    var options = new SqlScriptGeneratorOptions { SqlVersion = SqlVersion.Sql100, KeywordCasing = KeywordCasing.PascalCase };

    foreach (TSqlBatch batch in tsqlScriptFragment.Batches)
    {
        Console.WriteLine("--");
        string batchText = ToScript(batch, options);
        Console.WriteLine(batchText);                
    }
}

public static TSqlParser GetParser(SqlVersion level, bool quotedIdentifiers)
{
    switch (level)
    {
        case SqlVersion.Sql80:
            return new TSql80Parser(quotedIdentifiers);
        case SqlVersion.Sql90:
            return new TSql90Parser(quotedIdentifiers);
        case SqlVersion.Sql100:
            return new TSql100Parser(quotedIdentifiers);
        case SqlVersion.SqlAzure:
            return new TSqlAzureParser(quotedIdentifiers);
        default:
            throw new ArgumentOutOfRangeException("level");
    }
}

public static IScriptFragment Parse(string sql, SqlVersion level, bool quotedIndentifiers, out string[] errors)
{
    errors = null;
    if (string.IsNullOrWhiteSpace(sql)) return null;
    sql = sql.Trim();
    IScriptFragment scriptFragment;
    IList<ParseError> errorlist;
    using (var sr = new StringReader(sql))
    {
        scriptFragment = GetParser(level, quotedIndentifiers).Parse(sr, out errorlist);
    }
    if (errorlist != null && errorlist.Count > 0)
    {
        errors = errorlist.Select(e => string.Format("Column {0}, Identifier {1}, Line {2}, Offset {3}",
                                                        e.Column, e.Identifier, e.Line, e.Offset) +
                                            Environment.NewLine + e.Message).ToArray();
        return null;
    }
    return scriptFragment;
}

public static SqlScriptGenerator GetScripter(SqlScriptGeneratorOptions options)
{
    if (options == null) return null;
    SqlScriptGenerator generator;
    switch (options.SqlVersion)
    {
        case SqlVersion.Sql80:
            generator = new Sql80ScriptGenerator(options);
            break;
        case SqlVersion.Sql90:
            generator = new Sql90ScriptGenerator(options);
            break;
        case SqlVersion.Sql100:
            generator = new Sql100ScriptGenerator(options);
            break;
        case SqlVersion.SqlAzure:
            generator = new SqlAzureScriptGenerator(options);
            break;
        default:
            throw new ArgumentOutOfRangeException();
    }
    return generator;
}

public static string ToScript(IScriptFragment scriptFragment, SqlScriptGeneratorOptions options)
{
    var scripter = GetScripter(options);
    if (scripter == null) return string.Empty;
    string script;
    scripter.GenerateScript(scriptFragment, out script);
    return script;
}

SQL Server管理对象

添加对以下内容的引用:

  • Microsoft.SqlServer.Smo
  • Microsoft.SqlServer.ConnectionInfo
  • Microsoft.SqlServer.Management.Sdk.Sfc

然后,您可以使用以下代码:

using (SqlConnection connection = new SqlConnection("Server=(local);Database=Sample;Trusted_Connection=True;"))
{
    ServerConnection svrConnection = new ServerConnection(connection);
    Server server = new Server(svrConnection);
    server.ConnectionContext.ExecuteNonQuery(script);
}

CodeFluent运行时

CodeFluent运行时数据库有一个小的sql文件解析器。它不处理复杂的情况,但是例如支持注释。

using (StatementReader statementReader = new CodeFluent.Runtime.Database.Management.StatementReader("GO", Environment.NewLine, inputStream))
{
    Statement statement;
    while ((statement = statementReader.Read(StatementReaderOptions.Default)) != null)
    {
        Console.WriteLine("-- ");
        Console.WriteLine(statement.Command);
    }
}

或更简单

new CodeFluent.Runtime.Database.Management.SqlServer.Database("connection string")
      .RunScript("path", StatementReaderOptions.Default);
2021-03-17