planner and join type mismatches

Tom Lane <tgl@sss.pgh.pa.us> said:

> ---------------------------(end of broadcast)---------------------------
> TIP 9: the planner will ignore your desire to choose an index scan if your
>       joining column's datatypes do not match
>

Re: tip 9 :-).  In 7.3.5 is it possible that the planner is finding a type
mismatch when there isn't one, resulting in a seq scan being selected?  I've
had a problem with joining tables on an int8 column (primary key column in one
of the tables).  Tested left outer and where clause syntax.

TIA,

Jim Wilson