Skip to content

P
Postgres FD Implementation
Switch branch/tag
  1. 12 Jul, 2017 3 commits
  3. 11 Jul, 2017 1 commit
    • Tom Lane's avatar
      Fix multiple assignments to a column of a domain type. · b1cb32fb
      Tom Lane authored 
      We allow INSERT and UPDATE commands to assign to the same column more than
once, as long as the assignments are to subfields or elements rather than
the whole column.  However, this failed when the target column was a domain
over array rather than plain array.  Fix by teaching process_matched_tle()
to look through CoerceToDomain nodes, and add relevant test cases.

Also add a group of test cases exercising domains over array of composite.
It's doubtless accidental that CREATE DOMAIN allows this case while not
allowing straight domain over composite; but it does, so we'd better make
sure we don't break it.  (I could not find any documentation mentioning
either side of that, so no doc changes.)

It's been like this for a long time, so back-patch to all supported
branches.

Discussion: https://postgr.es/m/4206.1499798337@sss.pgh.pa.us
      b1cb32fb
  5. 10 Jul, 2017 10 commits
  7. 09 Jul, 2017 3 commits
  9. 08 Jul, 2017 1 commit
  11. 07 Jul, 2017 2 commits
  13. 06 Jul, 2017 4 commits
    • Teodor Sigaev's avatar
      Fix potential data corruption during freeze · 31b8db8e
      Teodor Sigaev authored 
      Fix oversight in 3b97e682 bug fix. Bitwise AND is used instead of OR and
it cleans all bits in t_infomask heap tuple field.

Backpatch to 9.3
      31b8db8e
    • Dean Rasheed's avatar
      Clarify the contract of partition_rbound_cmp(). · f1dae097
      Dean Rasheed authored 
      partition_rbound_cmp() is intended to compare range partition bounds
in a way such that if all the bound values are equal but one is an
upper bound and one is a lower bound, the upper bound is treated as
smaller than the lower bound. This particular ordering is required by
RelationBuildPartitionDesc() when building the PartitionBoundInfoData,
so that it can consistently keep only the upper bounds when upper and
lower bounds coincide.

Update the function comment to make that clearer.

Also, fix a (currently unreachable) corner-case bug -- if the bound
values coincide and they contain unbounded values, fall through to the
lower-vs-upper comparison code, rather than immediately returning
0. Currently it is not possible to define coincident upper and lower
bounds containing unbounded columns, but that may change in the
future, so code defensively.

Discussion: https://postgr.es/m/CAAJ_b947mowpLdxL3jo3YLKngRjrq9+Ej4ymduQTfYR+8=YAYQ@mail.gmail.com
      f1dae097
    • Dean Rasheed's avatar
      Simplify the logic checking new range partition bounds. · c03911d9
      Dean Rasheed authored 
      The previous logic, whilst not actually wrong, was overly complex and
involved doing two binary searches, where only one was really
necessary. This simplifies that logic and improves the comments.

One visible change is that if the new partition overlaps multiple
existing partitions, the error message now always reports the overlap
with the first existing partition (the one with the lowest
bounds). The old code would sometimes report the clash with the first
partition and sometimes with the last one.

Original patch idea from Amit Langote, substantially rewritten by me.

Discussion: https://postgr.es/m/CAAJ_b947mowpLdxL3jo3YLKngRjrq9+Ej4ymduQTfYR+8=YAYQ@mail.gmail.com
      c03911d9
    • Tom Lane's avatar
      Fix another race-condition-ish issue in recovery/t/001_stream_rep.pl. · ec86af91
      Tom Lane authored 
      Buildfarm members hornet and sungazer have shown multiple instances of
"Failed test 'xmin of non-cascaded slot with hs feedback has changed'".
The reason seems to be that the test is checking the current xmin of the
master server's replication slot against a past xmin of the first slave
server's replication slot.  Even though the latter slot is downstream of
the former, it's possible for its reported xmin to be ahead of the former's
reported xmin, because those numbers are updated whenever the respective
downstream walreceiver feels like it (see logic in WalReceiverMain).
Instrumenting this test shows that indeed the slave slot's xmin does often
advance before the master's does, especially if an autovacuum transaction
manages to occur during the relevant window.  If we happen to capture such
an advanced xmin as $xmin, then the subsequent wait_slot_xmins call can
fall through before the master's xmin has advanced at all, and then if it
advances before the get_slot_xmins call, we can get the observed failure.
Yeah, that's a bit of a long chain of deduction, but it's hard to explain
any other way how the test can get past an "xmin <> '$xmin'" check only
to have the next query find that xmin does equal $xmin.

Fix by keeping separate images of the master and slave slots' xmins
and testing their has-xmin-advanced conditions independently.
      ec86af91
  15. 05 Jul, 2017 5 commits
  17. 04 Jul, 2017 2 commits
  19. 03 Jul, 2017 4 commits
  21. 02 Jul, 2017 5 commits
    • Tom Lane's avatar
      Fix bug in PostgresNode::query_hash's split() call. · efdb4f29
      Tom Lane authored 
      By default, Perl's split() function drops trailing empty fields,
which is not what we want here.  Oversight in commit fb093e4c.
We'd managed to miss it thus far thanks to the very limited usage
of this function.

Discussion: https://postgr.es/m/14837.1499029831@sss.pgh.pa.us
      efdb4f29
    • Tom Lane's avatar
      Try to improve readability of recovery/t/009_twophase.pl test. · 4e15387d
      Tom Lane authored 
      The original coding here was very confusing, because it named the
two servers it set up "master" and "slave" even though it swapped
their replication roles multiple times.  At any given point in the
script it was very unobvious whether "$node_master" actually referred
to the server named "master" or the other one.  Instead, pick arbitrary
names for the two servers --- I used "london" and "paris" --- and
distinguish those permanent names from the nonce references $cur_master
and $cur_slave.  Add logging to help distinguish which is which at
any given point.  Also, use distinct data and transaction names to
make all the prepared transactions easily distinguishable in the
postmaster logs.  (There was one place where we intentionally tested
that the server could cope with re-use of a transaction name, but
it seems like one place is sufficient for that purpose.)

Also, add checks at the end to make sure that all the transactions
that were supposed to be committed did survive.

Discussion: https://postgr.es/m/28238.1499010855@sss.pgh.pa.us
      4e15387d
    • Tom Lane's avatar
      Improve TAP test function PostgresNode::poll_query_until(). · de3de0af
      Tom Lane authored 
      Add an optional "expected" argument to override the default assumption
that we're waiting for the query to return "t".  This allows replacing
a handwritten polling loop in recovery/t/007_sync_rep.pl with use of
poll_query_until(); AFAICS that's the only remaining ad-hoc polling
loop in our TAP tests.

Change poll_query_until() to probe ten times per second not once per
second.  Like some similar changes I've been making recently, the
one-second interval seems to be rooted in ancient traditions rather
than the actual likely wait duration on modern machines.  I'd consider
reducing it further if there were a convenient way to spawn just one
psql for the whole loop rather than one per probe attempt.

Discussion: https://postgr.es/m/12486.1498938782@sss.pgh.pa.us
      de3de0af
    • Peter Eisentraut's avatar
      doc: Document that logical replication supports synchronous replication · 2dca0343
      Peter Eisentraut authored 
      Update the documentation a bit to include that logical replication as
well as other and third-party replication clients can participate in
synchronous replication.
      2dca0343
    • Peter Eisentraut's avatar
      Refine memory allocation in ICU conversions · d8b3c813
      Peter Eisentraut authored 
      The simple calculations done to estimate the size of the output buffers
for ucnv_fromUChars() and ucnv_toUChars() could overflow int32_t for
large strings.  To avoid that, go the long way and run the function
first without an output buffer to get the correct output buffer size
requirement.
      d8b3c813