具有讽刺意味的解析SQL语句 [英] Parsing SQL Statement With Irony

问题描述

我正在尝试创建一种将常规sql语句转换为c#对象的方法，因此我决定使用Irony解析sql语句，然后将该语句作为包含该语句类型和value的Action返回.取决于类型

I am trying to create a method that converts a regular sql statement to c# objects, So i decided to use Irony to parse the sql statement then i return the statement as an Action that contains the type of the statement and the values of it depending on the type

这是我未完成的代码[因为我不知道该怎么办而感到沮丧]

Here is my non completed code [ Because i got frustrated as i don't know what to do then ]

private List<Action> ParseStatement(string statement)
{
    var parser = new Parser(new SqlGrammar());
    var parsed = parser.Parse(statement);
    var status = parsed.Status;

    while (parsed.Status == ParseTreeStatus.Parsing)
    {
        Task.Yield();
    }

    if (status == ParseTreeStatus.Error)
        throw new ArgumentException("The statement cannot be parsed.");

    ParseTreeNode parsedStmt = parsed.Root.ChildNodes[0];

    switch (parsedStmt.Term.Name)
    {
        case "insertStmt":
            var table = parsedStmt.ChildNodes.Find(x => x.Term.Name == "Id").ChildNodes[0].Token.ValueString;
            var valuesCount =
                parsedStmt.ChildNodes.Find(x => x.Term.Name == "insertData").ChildNodes.Find(
                    x => x.Term.Name == "exprList").ChildNodes.Count;
            var values = parsedStmt.ChildNodes.Find(x => x.Term.Name == "insertData").ChildNodes.Find(
                    x => x.Term.Name == "exprList").ChildNodes;
            foreach (var value in values)
            {
                string type = value.Token.Terminal.Name;
            }
            break;
    }

    return null;
}

private Type ParseType(string type)
{
    switch (type)
    {
        case "number":
            return typeof (int);
        case "string":
            return typeof (string);
    }

    return null;
}

所以这里的问题是:我该如何利用Irony将字符串SQL语句转换为c#对象?

So the Question Here is : How could i make use of Irony to convert a string SQL Statement to a c# objects ?

这是我想要实现的一个示例:

Here is an example of what i want to achieve :

插入人员值(4，"Nilsen"，"Johan"，"Bakken 2"， 斯塔万格")

INSERT INTO Persons VALUES (4,'Nilsen', 'Johan', 'Bakken 2', 'Stavanger')

并将其转换为

return new Action<string type, string table, int val1, string val2, string val3, string val4, string val5>;

动态地取决于从语句中读取的方法.

Dynamically depending on what the method have read from the statement.

我希望我已经很好地解释了我的想法，以便您可以帮助我，如果有不清楚的地方，请告诉我，我会尽力解释.

I hope i have well explained my idea so you can help me guys, And if there is something unclear please tell me and i will try to explain it.

推荐答案

我也尝试使用Irony解析SQL.我之所以放弃是因为Irony中的示例SQL解析器无法处理:CTE，按列号排序，特殊语句的一半，如

I was trying to parse SQL with Irony as well. I gave up because the sample SQL parser in Irony don't handle: CTEs, Order by column number, half the special statements like

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED

虽然我花了很多时间来学习Irony，但我没有编码技巧来正确实现上述所有部分.

While I had a great time learning about Irony, I don't have the coding chops to implement all the aforementioned parts correctly.

我最终使用了Microsoft提供的SQL解析库.下面的LINQPad 5的示例代码:

I ended up using the Microsoft-provided SQL parsing library. Sample code for LINQPad 5 below:

// Add a reference to
// C:\Program Files (x86)\Microsoft SQL Server\130\SDK\Assemblies\
//   Microsoft.SqlServer.TransactSql.ScriptDom.dll
// 
// https://blogs.msdn.microsoft.com/gertd/2008/08/21/getting-to-the-crown-jewels/

public void Main()
{
    var sqlFilePath = @"C:\Users\Colin\Documents\Vonigo\database-scripts\Client\Estimate\spClient_EstimateAddNew.sql";
    bool fQuotedIdenfifiers = false;
    var parser = new TSql100Parser(fQuotedIdenfifiers);

    string inputScript = File.ReadAllText(sqlFilePath);
    IList<ParseError> errors;
    using (StringReader sr = new StringReader(inputScript))
    {
        var fragment = parser.Parse(sr, out errors);
        fragment.Dump();
    }
}

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