public static void main(String[] args) {
String parserConfPath = args[0];
ParserMain pm = new ParserMain();
Map map = pm.createConfig(parserConfPath);
QueryPlan plan = pm.generatePlan(map);
System.out.println(ParserUtil.toString(plan));
System.out.println(ParserUtil.parToString(plan, map));
new Main(plan, map, parserConfPath);
}
@Override
public void visit(Column column) {
// extract type for the column
TypeConversion tc = _schema.getType(ParserUtil.getFullSchemaColumnName(column, _tan));
// extract the position (index) of the required column
int position = _it.getColumnIndex(column, _affectedComponent);
ValueExpression ve = new ColumnReference(tc, position);
_exprStack.push(ve);
}