我正在尝试构建一个程序,它通过错误处理批量执行sql语句 (因此我没有使用SMO)。
问题是 GO 不是SQL的一部分,当使用.NET执行语句时,它最终会出错(SMO会处理它但不会指示执行是否失败) )。
string statements = File.ReadAllText("c:\\test.sql");
string[] splitted = statements.split("GO");
使用上述行并不能解决我的问题,因为 GO 关键字也可以出现在评论中(我不想从语句中删除评论)和评论可以进来
/ ** /
或者在两个破折号之后 -
例如,我不想要解析以下代码:
/*
GO
*/
(ofc我用谷歌搜索它,但那里没有解决方案)
答案 0 :(得分:8)
最简单的解决方案(也是最强大的)是使用T-SQL解析器。好消息是你不必写它,只需添加对:
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;
}
添加对以下内容的引用:
Microsoft.SqlServer.Smo
Microsoft.SqlServer.ConnectionInfo
Microsoft.SqlServer.Management.Sdk.Sfc
然后您可以使用此代码:
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 Runtime Database有一个小的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
new CodeFluent.Runtime.Database.Management.SqlServer.Database("connection string")
.RunScript("path", StatementReaderOptions.Default);
答案 1 :(得分:-1)
仅在&#34; GO&#34;站在一条孤独的线上或用空格,就像这样:
Regex.Split(statements, @"^\s+GO\s+$");
答案 2 :(得分:-1)
是的,SSMS必须允许你解决问题。正如你所提到的,它不是sql的一部分。 SSMS使用SMO来完成它的工作,这就是它在那里工作的原因。
正如您的评论所表明的那样,但问题很混乱,您需要在处理之前删除所有评论块。如果您不想这样做,则需要将该文件作为流处理,然后在/*
处开始忽略并停在*/
...并且可能还--
和{ {1}}
您还可以使用正则表达式将其拆分(如果您将其作为文本blob读取,而不是已被行分解):
\n|\r\n
是的,正如评论所说,你真正的答案是编写一个解析器。即使您对评论所说的话,您仍然可以在var text = File.ReadAllText("file.txt")
var cleanedText = Regex.Replace(text, @"/\*.*\*/", "", RegexOptions.Singleline)
var parts = Regex.Split(cleanedText, @"^\s*GO.*$", 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"]
内的STRING中嵌入/*
和*/
。所以......