Its not an OpExpr . It is a VAR , got it from "reltargetlist" in base relation ( RelOptInfo) . Can you shed some light on where the conversion from 141 to "original" attribute number takes place ??
Regards,
Harsha
On Fri, Apr 29, 2016 at 10:03 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
sri harsha <sriharsha9992@gmail.com> writes: > Assume the following query , > (SELECT a * 1 , b FROM TABLE_1) UNION ALL (SELECT a *1 , b FROM TABLE_2);
> In this query , attribute number of the VARs are 141 and 2 respectively !!
I doubt it.
Maybe you're looking at something that's not a Var, possibly an OpExpr, but assuming it's a Var? The fact that 141 is the pg_proc OID of int4mul lends considerable weight to this suspicion ...