At Mon, 28 Mar 2022 18:36:46 +0900 (JST), Kyotaro Horiguchi <horikyota.ntt@gmail.com> wrote in
> Inserting EnsurePortalSnapshotExists() to RunFromStore fixes this but
> I'm not sure where is the right place to do this..
Then, I found that portal->holdSnapshot is that. I came up with the
attached. It does the follows:
1. Teach PlannedStmtRequiresSnapshot() to return true for FetchStmt.
2. Use holdSnapshot in RunFromStore if any.
The rerpducer is reduced to as small as the following.
CREATE TABLE t (a text);
INSERT INTO t VALUES('some random text');
BEGIN;
DECLARE c CURSOR FOR SELECT * FROM t;
FETCH ALL IN c;
But I haven't come up with a reasonable way to generate the 'some
random text' yet.
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
