Hi All, I need to check type of expressions appearing in a Query tree and I am using exprType() for that. But for certain expressions their type is not defined like List, FromExpr, JoinExpr. Such expressions are acceptable in the code, but expressions which have a type need to obey certain criteria like they can not be composite type etc. exprType() throws error when it's passed expressions which do not have type and hence I can not use it directly. Is there a function, which would tell me whether a given expression can have a type or not?
-- Best Wishes, Ashutosh Bapat EntepriseDB Corporation The Enterprise Postgres Company
