protected ConvertedRelNode validateAndConvert(SqlNode sqlNode)
throws ForemanSetupException, RelConversionException, ValidationException {
final SqlNode rewrittenSqlNode = rewrite(sqlNode);
final TypedSqlNode validatedTypedSqlNode = validateNode(rewrittenSqlNode);
final SqlNode validated = validatedTypedSqlNode.getSqlNode();
RelNode rel = convertToRel(validated);
rel = preprocessNode(rel);
return new ConvertedRelNode(rel, validatedTypedSqlNode.getType());
}
private TypedSqlNode validateNode(SqlNode sqlNode)
throws ValidationException, RelConversionException, ForemanSetupException {
TypedSqlNode typedSqlNode = planner.validateAndGetType(sqlNode);
SqlNode sqlNodeValidated = typedSqlNode.getSqlNode();
// Check if the unsupported functionality is used
UnsupportedOperatorsVisitor visitor = UnsupportedOperatorsVisitor.createVisitor(context);
try {
sqlNodeValidated.accept(visitor);
} catch (UnsupportedOperationException ex) {
// If the exception due to the unsupported functionalities
visitor.convertException();
// If it is not, let this exception move forward to higher logic
throw ex;
}
return typedSqlNode;
}