public static AlterColumnInfo ReadColumnInfo(LexemCollection collection)
{
var lex = collection.CurrentLexem();
var col = CommonParserFunc.ReadColumnNameOnly(collection);
AlterColumnInfo cd = new AlterColumnInfo();
cd.Name = col;
lex = collection.GotoNextMust();
if (lex.LexemType != LexType.Command)
{
collection.ErrorUnexpected(collection.CurrentLexem());
}
ExactType?tp = ExactType.Parse(collection);
if (tp == null)
{
collection.Error("Unknow data type", collection.CurrentOrLast());
}
cd.Type = tp.Value;
lex = collection.GotoNext();
while (lex != null && lex.LexemType != LexType.Zpt && !lex.IsSkobraClose())
{
string s1 = lex.LexemText.ToLower();
if (ParserUtils.ParseCommandPhrase(collection, "not null"))
{
cd.Nullable = false;
}
else if (ParserUtils.ParseCommandPhrase(collection, "null"))
{
cd.Nullable = true;
}
else if (ParserUtils.ParseCommandPhrase(collection, "primary key"))
{
cd.PrimaryKey = true;
}
else if (lex.LexemType == LexType.Command && (s1 == "auto_increment"))
{
cd.AutoIncrement = true;
}
else
{
collection.ErrorUnexpected(collection.CurrentOrLast());
}
lex = collection.GotoNext();
}
return(cd);
}
public static void DoParseInside(Expression exp, LexemCollection collection)
{
var idx = collection.IndexLexem;
var le = collection.GotoNext();
if (le == null)
{
collection.Error("неожиданный конец", collection.GetPrev());
}
if (!le.IsSkobraOpen())
{
collection.Error("Ожидалась открывающая скобка", collection.GetPrev());
}
le = collection.GotoNext();
while (true)
{
if (le.IsSkobraClose())
{
return;
}
ExpressionParser tonode = new ExpressionParser(collection);
tonode.Parse();
if (collection.CurrentLexem() == null)
{
collection.Error("нет закрывающейся скобки", collection.GetLast());
}
if (tonode.Results.Count == 0)
{
collection.Error("нет значений", collection.Get(idx));
}
if (tonode.Results.Count > 1)
{
collection.Error("несколько значений", collection.Get(idx));
}
exp.AddChild(tonode.Results[0]);
if (collection.CurrentLexem().LexemType == LexType.Zpt)
{
collection.GotoNext();
continue;
}
if (collection.CurrentLexem().IsSkobraClose())
{
return;
}
collection.Error("Unknow value", collection.CurrentLexem());
}
}