ResetExprContext(econtext) is defined as MemoryContextReset((econtext)->ecxt_per_tuple_memory).
I can register callback in MemoryContext but it is always cleaned on every call to MemoryContextReset().
How to reset some fields of ExprContext ( living in per_query_memory ) when ResetExprContext is called ?
czw., 31 paź 2019 o 16:52 Andres Freund <andres@anarazel.de> napisał(a):
Hi,
On October 31, 2019 8:51:11 AM PDT, Andrzej Barszcz <abusinf@gmail.com> wrote: >x <> 0 is evaluated first, 1/x only when x <> 0, not ? > >czw., 31 paź 2019 o 16:45 Tom Lane <tgl@sss.pgh.pa.us> napisał(a): > >> Andres Freund <andres@anarazel.de> writes: >> > Potentially related note: for nodes like seqscan, combining the >qual and >> projection processing into one expression seems to be a noticable win >(at >> least when taking care do emit two different sets of deform >expression >> steps). >> >> There's just one problem: that violates SQL semantics, and not in >> a small way. >> >> select 1/x from tab where x <> 0
On postgres lists the policy is to reply below the quoted bit, and to trim the quote appropriately.
Andres -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
