在C#中执行包含GO语句的SQL批处理

本文关键字：语句 SQL 批处理 GO 包含 执行 | 更新日期: 2023-09-27 18:19:52

我正在尝试构建一个程序，该程序可以批量执行sql语句并进行错误处理（因此我不使用SMO）。

问题是GO不是SQL的一部分，当使用.NET执行语句时，它最终会出现错误（SMO会处理它，但不会给出执行是否失败的任何指示）。

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

使用以上几行并不能解决我的问题，因为GO关键字也可以出现在注释中（我不想从语句中删除注释），注释也可以出现/**/或在两个破折号之后--
例如，我不希望解析以下代码：

/*
GO
*/

（我在谷歌上搜索了一下，但那里没有解决方案）

在C#中执行包含GO语句的SQL批处理

ScriptDom

最简单的解决方案（也是最健壮的）是使用T-SQL解析器。好消息是，你不必写它，只需添加参考：

  • 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

添加引用到：

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

然后你可以使用这个代码：

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型sql文件解析器。它不处理复杂的情况，但例如支持注释。

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);
    }
}

或者更简单的

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

ScriptDom（2023年更新）

@meziantou的答案的编辑队列已满（500条建议的大小似乎没有任何拥有编辑权限的人会通过它），所以我将这个更新后的答案添加为社区wiki。ScriptDom现在住在nuget，github

ScriptDom是一个支持批处理文件的T-SQL解析器。只需添加对nuget包Microsoft.SqlServer.Transactionsql.ScriptDom的引用即可。示例：

using Microsoft.SqlServer.TransactSql.ScriptDom;
namespace ScriptDomTest;
internal class Program
{
    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)
    {
        return level switch
        {
            SqlVersion.Sql80 => new TSql80Parser(quotedIdentifiers),
            SqlVersion.Sql90 => new TSql90Parser(quotedIdentifiers),
            SqlVersion.Sql100 => new TSql100Parser(quotedIdentifiers),
            SqlVersion.Sql110 => new TSql110Parser(quotedIdentifiers),
            SqlVersion.Sql120 => new TSql120Parser(quotedIdentifiers),
            SqlVersion.Sql130 => new TSql130Parser(quotedIdentifiers),
            SqlVersion.Sql140 => new TSql140Parser(quotedIdentifiers),
            SqlVersion.Sql150 => new TSql150Parser(quotedIdentifiers),
            SqlVersion.Sql160 => new TSql160Parser(quotedIdentifiers),
            _ => throw new ArgumentOutOfRangeException(nameof(level)),
        };
    }
    public static TSqlFragment? Parse(string sql, SqlVersion level, bool quotedIndentifiers, out string[]? errors)
    {
        errors = null;
        if (string.IsNullOrWhiteSpace(sql)) return null;
        sql = sql.Trim();
        TSqlFragment 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}, Number {1}, Line {2}, Offset {3}",
                                                            e.Column, e.Number, e.Line, e.Offset) +
                                                Environment.NewLine + e.Message).ToArray();
            return null;
        }
        return scriptFragment;
    }
    public static SqlScriptGenerator? GetScripter(SqlScriptGeneratorOptions options)
    {
        if (options == null) return null;
        return options.SqlVersion switch
        {
            SqlVersion.Sql80 => new Sql80ScriptGenerator(options),
            SqlVersion.Sql90 => new Sql90ScriptGenerator(options),
            SqlVersion.Sql100 => new Sql100ScriptGenerator(options),
            SqlVersion.Sql110 => new Sql110ScriptGenerator(options),
            SqlVersion.Sql120 => new Sql120ScriptGenerator(options),
            SqlVersion.Sql130 => new Sql130ScriptGenerator(options),
            SqlVersion.Sql140 => new Sql140ScriptGenerator(options),
            SqlVersion.Sql150 => new Sql150ScriptGenerator(options),
            SqlVersion.Sql160 => new Sql160ScriptGenerator(options),
            _ => throw new ArgumentOutOfRangeException(nameof(options)),
        };
    }
    public static string ToScript(TSqlFragment scriptFragment, SqlScriptGeneratorOptions options)
    {
        var scripter = GetScripter(options);
        if (scripter == null) return string.Empty;
        string script;
        scripter.GenerateScript(scriptFragment, out script);
        return script;
    }
}

是的，go是SSMS必须允许您分解的东西。正如您所提到的，它不是sql的一部分。SSMS使用SMO来完成它的工作，所以这就是它在那里工作的原因。

正如你的评论所表明的，但问题很模糊，你需要在处理之前删除所有评论块。如果您不想这样做，您需要将文件作为流处理，并在/*处开始忽略，在*/处停止。。。可能还有CCD_ 8和CCD_ 9

您也可以使用正则表达式将其拆分（如果您将其作为文本blob读取，但尚未按行拆分）：

var text = File.ReadAllText("file.txt")
var cleanedText = Regex.Replace(text, @"/'*.*'*/", "", RegexOptions.Singleline)
var parts = Regex.Split(cleanedText, @"^'s*GO.*$", RegexOptions.Multiline);
for(var part in parts) {
    executeBatch(part);
} 
// but this is getting ugly
var str = "what /*'n the 'n'n GO 'n*/heck'nGO'nand then";
var cleanedText = Regex.Replace(str, @"/'*.*'*/", "'n", RegexOptions.Singleline)
var split = Regex.Split(cleanedText, @"^'s*GO.*$", RegexOptions.Multiline);
// == ["what'nheck", "'nand then"]

是的，正如评论所说，真正的答案是编写一个解析器。即使有了关于注释的内容，您仍然可以将/*和*/嵌入到insert内部的STRING中。所以…

只有当"GO"站在一条孤独的线上或有空白时才拆分，如下所示：

Regex.Split(statements, @"^'s+GO's+$");
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