public override IExplore Expolore(DelegateExpessionExplorer del)
{
List <SetClause> Set2 = new List <SetClause>();
Set.ForEach(a =>
{
SetClause ss = (SetClause)a.Expolore(del);
if (ss != null)
{
Set2.Add(ss);
}
});
Set.Replace(Set2);
if (Where != null)
{
Where = (Expression)Where.Expolore(del);
}
return(base.Expolore(del));
}
public override void ParseInside(ExpressionParser parser)
{
var collection = parser.Collection;
var lex = collection.CurrentLexem();
if (lex.LexemText.ToLower() != "update")
{
throw new Exception("Not UPDATE statment");
}
lex = collection.GotoNextMust();
FromParser fc = new FromParser();
fc.Parse(collection);
if (fc.Tables.Count > 1)
{
collection.Error("Multi tables in update", collection.CurrentLexem());
}
if (fc.Tables.Count == 0)
{
collection.Error("Not table clause", collection.CurrentLexem());
}
TableClause = fc.Tables[0];
//string[] tablename = CommonParserFunc.ReadTableName(collection);
//TableClause = TableClause.CreateByTable(tablename, collection.TableGetter.GetTableByName(tablename));
//lex = collection.GotoNextMust();
lex = collection.CurrentLexem();
if (lex.LexemText.ToLower() != "set")
{
collection.Error("SET keyword is not found", collection.CurrentLexem());
}
while (true)
{
lex = collection.GotoNextMust();//пропускаем SET или ','
//lex = collection.CurrentLexem();
SetClause sc = new SetClause();
sc.Column = CommonParserFunc.ReadColumn(collection);
lex = collection.GotoNextMust();
if (lex.LexemText != "=")
{
collection.Error("Operator '=' is not found", collection.CurrentLexem());
}
lex = collection.GotoNextMust();
ExpressionParser e = new ExpressionParser(parser.Collection);
e.Parse();
sc.Value = e.Single();
Set.Add(sc);
lex = collection.CurrentLexem();
if (lex == null)
{
break;
}
if (lex.LexemType == LexType.Zpt)
{
continue;
}
break;
}
if (lex == null)
{
return;
}
if (lex.LexemText.ToLower() == "where")
{
collection.GotoNextMust();
ExpressionParser e = new ExpressionParser(parser.Collection);
e.Parse();
Where = e.Single();
}
ParseReturining(parser);
}