@Override
protected Type visitIsNullPredicate(IsNullPredicate node, AnalysisContext context) {
process(node.getValue(), context);
expressionTypes.put(node, BOOLEAN);
return BOOLEAN;
}
@Override
protected String visitIsNullPredicate(IsNullPredicate node, Boolean unmangleNames) {
return "(" + process(node.getValue(), unmangleNames) + " IS NULL)";
}