[antlr-interest] A few questions about parsing SQL by PL/SQL.

[Felix.徐]

Hi all,
Does someone has experience using this PL/SQL(
https://github.com/porcelli/plsql-parser) grammar listed on antlr?
I got a few problems while trying to use it to parse a simple SQL string.
1.Am I right to generate the java code of  PLSQLLexer.g,PLSQLParser.g,
PLSQLWalker.g in sequence?I got a lot of warnings in this phase.
2.Is there any instruction about how to use the generated class for parsing
a SQL string and walking through it?Here is my code:
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
String source ="SELECT f FROM FS";
ANTLRStringStream input = new ANTLRStringStream(source);
    PLSQLLexer lex = new PLSQLLexer(input);
    CommonTokenStream tokens = new CommonTokenStream(lex);
    PLSQLParser parser = new PLSQLParser(tokens);
    try
    {
        parser.*****();
    }
    catch (RecognitionException e)
    {
        e.printStackTrace();
    }
}

I don't know which method should be invoked in "*****()".I tried
"parser.select_key();" but got "line 1:0 missing SQL92_RESERVED_SELECT at
'SELECT'".
Is there anything missing?

Thanks very much!