On 2013-01-15 17:41:50 +1300, Mark Kirkwood wrote:
> On 15/01/13 17:37, Mark Kirkwood wrote:
> >On 15/01/13 14:38, Andres Freund wrote:
> >>Hi everyone,
> >>
> >>Here is the newest version of logical changeset generation.
> >>
> >>
> >
> >
> >
> >I'm quite interested in this feature - so tried applying the 19 patches to
> >the latest 9.3 checkout. Patch and compile are good.
Thanks! Any input welcome.
The git tree might make it easier to follow development ;)
> >However portals seem busted:
> >
> >bench=# BEGIN;
> >BEGIN
> >bench=# DECLARE c1 CURSOR FOR SELECT * FROM pgbench_accounts;
> >DECLARE CURSOR
> >bench=# FETCH 2 FROM c1;
> > aid | bid | abalance | filler
> >
> >-----+-----+----------+---------------------------------------------------------
> >
> >-----------------------------
> > 1 | 1 | 0 |
> >
> > 2 | 1 | 0 |
> >
> >(2 rows)
> >
> >bench=# DELETE FROM pgbench_accounts WHERE CURRENT OF c1;
> >The connection to the server was lost. Attempting reset: Failed.
> >
>
> Sorry - forgot to add: assert and debug build, and it is an assertion
> failure that is being picked up:
>
> TRAP: FailedAssertion("!(htup->t_tableOid != ((Oid) 0))", File: "tqual.c",
> Line: 940)
I unfortunately don't see the error here, I guess its related to how
stack is reused. But I think I found the error, check the attached patch
which I also pushed to the git repository.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
>From 25bd9aeefb03ec39ff1d1cbbac4d2507d533f6d1 Mon Sep 17 00:00:00 2001
From: Andres Freund <and...@anarazel.de>
Date: Tue, 15 Jan 2013 11:50:33 +0100
Subject: [PATCH] wal_decoding: mergeme *Satisfies: Setup a correct
tup->t_tableOid in heap_get_latest_tid
Code review found one other case where tableOid potentially didn'T get set, in
nodeBitmapHeapscan. Thats fixed as well.
Found independently by Mark Kirkwood and Abhijit Menon-Sen
---
src/backend/access/heap/heapam.c | 1 +
src/backend/executor/nodeBitmapHeapscan.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c
index 1ff58a4..3346c8a 100644
--- a/src/backend/access/heap/heapam.c
+++ b/src/backend/access/heap/heapam.c
@@ -1789,6 +1789,7 @@ heap_get_latest_tid(Relation relation,
tp.t_self = ctid;
tp.t_data = (HeapTupleHeader) PageGetItem(page, lp);
tp.t_len = ItemIdGetLength(lp);
+ tp.t_tableOid = RelationGetRelid(relation);
/*
* After following a t_ctid link, we might arrive at an unrelated
diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index c83f972..eda1394 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -258,6 +258,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
scan->rs_ctup.t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
scan->rs_ctup.t_len = ItemIdGetLength(lp);
+ scan->rs_ctup.t_tableOid = scan->rs_rd->rd_id;
ItemPointerSet(&scan->rs_ctup.t_self, tbmres->blockno, targoffset);
pgstat_count_heap_fetch(scan->rs_rd);
--
1.7.12.289.g0ce9864.dirty
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