nested typecast via :: not handled

[ted-johnson]

The :: syntax is a shorthand for CAST
A valid Postgresql expression such as
('x'||substr(md5(hostname),1,16))::bit(64)::bigint as id_,
results in a parse error.

The problem is that in JSqlParserCC.jjt, the repetition block for :: specifies zero or 1 occurrences
(that is, enclosed in square braces [ ... ])

The fix is to specify zero or more occurrences.
at line 2505 or so in JSqlParserCC.jjt, change the code from

[ "::" type=ColDataType() {
castExpr = new CastExpression();
castExpr.setUseCastKeyword(false);
castExpr.setLeftExpression(retval);
castExpr.setType(type);
retval=castExpr;
} ]

to

( "::" type=ColDataType() {
castExpr = new CastExpression();
castExpr.setUseCastKeyword(false);
castExpr.setLeftExpression(retval);
castExpr.setType(type);
retval=castExpr;
} )*

I rebuilt JSqlParser using
mvn package
and the revised code passes all tests.

The revised code parsers the statement, and the default SQL generator returns the :: sequence.

[wumpz]

Could you provide a pull request?