Regression in working_tpch1/misc/bug3475.sql

select SUM('8.9') from datatypetestm t1, datatypetestm t2 where t1.cidx = t2.cidx and t1.cidx > 0;

It seems the quotes around '8.9' confuse something now. It should still treat it like a number and sum it, but we get NULL.

select SUM('a') from datatypetestm t1, datatypetestm t2 where t1.cidx = t2.cidx and t1.cidx > 0;

Summing a non-numerical. Used to return 0, now returns NULL.