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To avoid the compiler warnings:
launch_backend.c:211:39: warning: comparison of constant 16 with expression of type 'BackendType' (aka 'enum BackendType') is always true [-Wtautological-constant-out-of-range-compare]
launch_backend.c:233:39: warning: comparison of constant 16 with expression of type 'BackendType' (aka 'enum BackendType') is always true [-Wtautological-constant-out-of-range-compare]
The point of the assertions was to fail more explicitly if someone
adds a new BackendType to the end of the enum, but forgets to add it
to the child_process_kinds array. It was a pretty weak assertion to
begin with, because it wouldn't catch if you added a new BackendType
in the middle of the enum. So let's just remove it.
Per buildfarm member ayu and a few others, spotted by Tom Lane.
Discussion: https://www.postgresql.org/message-id/4119680.1710913067@sss.pgh.pa.us
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Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Discussion: https://www.postgresql.org/message-id/flat/9ec24d7b-633d-463a-84c6-7acff769c9e8%40eisentraut.org
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The builtin C.UTF-8 locale has similar semantics to the libc locale of
the same name. That is, code point sort order (fast, memcmp-based)
combined with Unicode semantics for character operations such as
pattern matching, regular expressions, and
LOWER()/INITCAP()/UPPER(). The character semantics are based on
Unicode simple case mappings.
The builtin provider's C.UTF-8 offers several important advantages
over libc:
* faster sorting -- benefits from additional optimizations such as
abbreviated keys and varstrfastcmp_c
* faster case conversion, e.g. LOWER(), at least compared with some
libc implementations
* available on all platforms with identical semantics, and the
semantics are stable, testable, and documentable within a given
Postgres major version
Being based on memcmp, the builtin C.UTF-8 locale does not offer
natural language sort order. But it is an improvement for most use
cases that might otherwise use libc's "C.UTF-8" locale, as well as
many use cases that use libc's "C" locale.
Discussion: https://postgr.es/m/ff4c2f2f9c8fc7ca27c1c24ae37ecaeaeaff6b53.camel%40j-davis.com
Reviewed-by: Daniel Vérité, Peter Eisentraut, Jeremy Schneider
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Historically we've printed SubPlan expression nodes as "(SubPlan N)",
which is pretty uninformative. Trying to reproduce the original SQL
for the subquery is still as impractical as before, and would be
mighty verbose as well. However, we can still do better than that.
Displaying the "testexpr" when present, and adding a keyword to
indicate the SubLinkType, goes a long way toward showing what's
really going on.
In addition, this patch gets rid of EXPLAIN's use of "$n" to represent
subplan and initplan output Params. Instead we now print "(SubPlan
N).colX" or "(InitPlan N).colX" to represent the X'th output column
of that subplan. This eliminates confusion with the use of "$n" to
represent PARAM_EXTERN Params, and it's useful for the first part of
this change because it eliminates needing some other indication of
which subplan is referenced by a SubPlan that has a testexpr.
In passing, this adds simple regression test coverage of the
ROWCOMPARE_SUBLINK code paths, which were entirely unburdened
by testing before.
Tom Lane and Dean Rasheed, reviewed by Aleksander Alekseev.
Thanks to Chantal Keller for raising the question of whether
this area couldn't be improved.
Discussion: https://postgr.es/m/2838538.1705692747@sss.pgh.pa.us
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On some systems, calls to pg_popcount{32,64} are indirected through
a function pointer. This commit converts pg_popcount() to a
function pointer on those systems so that we can inline the
appropriate pg_popcount{32,64} implementations into each of the
pg_popcount() implementations. Since pg_popcount() may call
pg_popcount{32,64} several times, this can significantly improve
its performance.
Suggested-by: David Rowley
Reviewed-by: David Rowley
Discussion: https://postgr.es/m/CAApHDvrb7MJRB6JuKLDEY2x_LKdFHwVbogpjZBCX547i5%2BrXOQ%40mail.gmail.com
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When considering nestloop paths for individual partitions within
a partitionwise join, if the inner path is parameterized, it is
parameterized by the topmost parent of the outer rel, not the
corresponding outer rel itself. Therefore, we need to translate the
parameterization so that the inner path is parameterized by the
corresponding outer rel.
Up to now, we did this while generating join paths. However, that's
problematic because we must also translate some expressions that are
shared across all paths for a relation, such as restriction clauses
(kept in the RelOptInfo and/or IndexOptInfo) and TableSampleClauses
(kept in the RangeTblEntry). The existing code fails to translate
these at all, leading to wrong answers, odd failures such as
"variable not found in subplan target list", or executor crashes.
But we can't modify them during path generation, because that would
break things if we end up choosing some non-partitioned-join path.
So this patch postpones reparameterization of the inner path until
createplan.c, where it is safe to modify the referenced RangeTblEntry,
RelOptInfo or IndexOptInfo, because we have made a final choice of which
Path to use. We do still have to check during path generation that
the reparameterization will be possible. So we introduce a new
function path_is_reparameterizable_by_child() to detect that.
The duplication between path_is_reparameterizable_by_child() and
reparameterize_path_by_child() is a bit annoying, but there seems
no other good answer. A small benefit is that we can avoid building
useless reparameterized trees in cases where a non-partitioned join
is ultimately chosen. Also, reparameterize_path_by_child() can now
be allowed to scribble on the input paths, saving a few cycles.
This fix repairs the same problems previously addressed in the
back branches by commits 62f120203 et al.
Richard Guo, reviewed at various times by Ashutosh Bapat, Andrei
Lepikhov, Alena Rybakina, Robert Haas, and myself
Discussion: https://postgr.es/m/CAMbWs496+N=UAjOc=rcD3P7B6oJe4rZw08e_TZRUsWbPxZW3Tw@mail.gmail.com
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Instead of the rather ugly type=int + name ~= location$, we now have a
marker type for offset pointers or sizes that are only relevant when a
query text is included, which decreases the complexity required in
gen_node_support.pl for handling these values.
Author: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAEze2WgrCiR3JZmWyB0YTc8HV7ewRdx13j0CqD6mVkYAW+SFGQ@mail.gmail.com
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The checks for data type usage were each connecting to all databases
in the cluster and running their query. On clusters which have a lot
of databases this can become unnecessarily expensive. This moves the
checks to run in a single connection instead to minimize setup and
teardown overhead.
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/BB4C76F-D416-4F9F-949E-DBE950D37787@yesql.se
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This way, the input literals match the output in any error messages.
Author: Paul A. Jungwirth <pj@illuminatedcomputing.com>
Discussion: https://www.postgresql.org/message-id/flat/CA+renyUApHgSZF9-nd-a0+OPGharLQLO=mDHcY4_qQ0+noCUVg@mail.gmail.com
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To match code changes in 229fb58d4f.
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This makes things a lot easier to read, especially when we get to the
FOREIGN KEY tests later.
Author: Paul A. Jungwirth <pj@illuminatedcomputing.com>
Discussion: https://www.postgresql.org/message-id/flat/CA+renyUApHgSZF9-nd-a0+OPGharLQLO=mDHcY4_qQ0+noCUVg@mail.gmail.com
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Add uuid_extract_timestamp() and uuid_extract_version().
Author: Andrey Borodin
Reviewed-by: Sergey Prokhorenko, Kirk Wolak, Przemysław Sztoch
Reviewed-by: Nikolay Samokhvalov, Jelte Fennema-Nio, Aleksander Alekseev
Reviewed-by: Peter Eisentraut, Chris Travers, Lukas Fittl
Discussion: https://postgr.es/m/CAAhFRxitJv%3DyoGnXUgeLB_O%2BM7J2BJAmb5jqAT9gZ3bij3uLDA%40mail.gmail.com
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warnings
This checks that certain I/O-related Perl functions properly check
their return value. Some parts of the PostgreSQL code had been a bit
sloppy about that. The new perlcritic warnings are fixed here. I
didn't design any beautiful error messages, mostly just used "or die
$!", which mostly matches existing code, and also this is
developer-level code, so having the system error plus source code
reference should be ok.
Initially, we only activate this check for a subset of what the
perlcritic check would warn about. The effective list is
chmod flock open read rename seek symlink system
The initial set of functions is picked because most existing code
already checked the return value of those, so any omissions are
probably unintended, or because it seems important for test
correctness.
The actual perlcritic configuration is written as an exclude list.
That seems better so that we are clear on what we are currently not
checking. Maybe future patches want to investigate checking some of
the other functions. (In principle, we might eventually want to check
all of them, but since this is test and build support code, not
production code, there are probably some reasonable compromises to be
made.)
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://www.postgresql.org/message-id/flat/88b7d4f2-46d9-4cc7-b1f7-613c90f9a76a%40eisentraut.org
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Change the test description to include the case mapping
test. Oversight in 5c40364dd6.
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Discussion: https://postgr.es/m/3703896.1710799495@sss.pgh.pa.us
Reported-by: Tom Lane
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Based on comments from Peter Eisentraut.
* Document CREATE DATABASE ... BUILTIN_LOCALE.
* Determine required encoding based on locale name for CREATE
COLLATION. Use -1 for "C" (requires catversion bump).
* initdb output fixups.
* Make ctype_is_c a constant true for now.
* Fixups to ICU 010_create_database.pl test.
Discussion: https://postgr.es/m/4135cf11-206d-40ed-96c0-9363c1232379@eisentraut.org
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Commit 61461a300c1c introduced new functions to libpq for cancelling
queries. This replaces the usage of the old ones in parts of the
codebase with these newer ones. This specifically leaves out changes to
psql and pgbench, as those would need a much larger refactor to be able
to call them due to the new functions not being signal-safe; and also
postgres_fdw, because the original code there is not clear to me
(Álvaro) and not fully tested.
Author: Jelte Fennema-Nio <postgres@jeltef.nl>
Discussion: https://postgr.es/m/CAGECzQT_VgOWWENUqvUV9xQmbaCyXjtRRAYO8W07oqashk_N+g@mail.gmail.com
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Found by Coverity.
Discussion: https://postgr.es/m/3422201.1710711993@sss.pgh.pa.us
Reported-by: Tom Lane
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I disabled it in cc6e64afda53 because it was unstable; hopefully the
changes here make it more stable. (Jelte proposed to submit the queries
using simple query protocol, but I chose to instead make the monitor
connection wait until the PgSleep wait event is seen. This is probably
not a terribly meaningful increase in coverage ...)
Discussion: https://postgr.es/m/CAGECzQRQh_5tSy+5cndgv08eNJ2O0Zpwn2YddJtSsmC=Wpy1BQ@mail.gmail.com
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Previously, bitmap heap scans only counted lossy and exact pages for
explain when there was at least one visible tuple on the page.
heapam_scan_bitmap_next_block() returned true only if there was a
"valid" page with tuples to be processed. However, the lossy and exact
page counters in EXPLAIN should count the number of pages represented
in a lossy or non-lossy way in the constructed bitmap, regardless of
whether or not the pages ultimately contained visible tuples.
Backpatch to all supported versions.
Author: Melanie Plageman
Discussion: https://www.postgresql.org/message-id/CAAKRu_ZwCwWFeL_H3ia26bP2e7HiKLWt0ZmGXPVwPO6uXq0vaA@mail.gmail.com
Discussion: https://www.postgresql.org/message-id/CAAKRu_bxrXeZ2rCnY8LyeC2Ls88KpjWrQ%2BopUrXDRXdcfwFZGA@mail.gmail.com
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Discussion: https://www.postgresql.org/message-id/flat/5ac50071-f2ed-4ace-a8fd-b892cffd33eb@www.fastmail.com
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This is code that runs in the backend process after forking, rather
than postmaster. Move it out of postmaster.c for clarity.
Reviewed-by: Tristan Partin, Andres Freund
Discussion: https://www.postgresql.org/message-id/7a59b073-5b5b-151e-7ed3-8b01ff7ce9ef@iki.fi
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Introduce new postmaster_child_launch() function that deals with the
differences in EXEC_BACKEND mode.
Refactor the mechanism of passing information from the parent to child
process. Instead of using different command-line arguments when
launching the child process in EXEC_BACKEND mode, pass a
variable-length blob of startup data along with all the global
variables. The contents of that blob depend on the kind of child
process being launched. In !EXEC_BACKEND mode, we use the same blob,
but it's simply inherited from the parent to child process.
Reviewed-by: Tristan Partin, Andres Freund
Discussion: https://www.postgresql.org/message-id/7a59b073-5b5b-151e-7ed3-8b01ff7ce9ef@iki.fi
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This just moves the functions, with no other changes, to make the next
commits smaller and easier to review. The moved functions are related
to launching postmaster child processes in EXEC_BACKEND mode.
Reviewed-by: Tristan Partin, Andres Freund
Discussion: https://www.postgresql.org/message-id/7a59b073-5b5b-151e-7ed3-8b01ff7ce9ef@iki.fi
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The next commit will move the internal_forkexec() function to a
different source file, but it makes sense to keep all the code related
to the win32 waitpid() emulation in postmaster.c. Split it off to a
separate function now, to make the next commit more mechanical.
Reviewed-by: Tristan Partin, Andres Freund
Discussion: https://www.postgresql.org/message-id/7a59b073-5b5b-151e-7ed3-8b01ff7ce9ef@iki.fi
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This routine has been removed in 39969e2a1e4d with the exclusive backup
mode but there were still references to it.
Issue noticed while working on 071e3ad59d6f.
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Since commit 012460ee93, some compilers have been warning that a
couple of variables may be used uninitialized. There doesn't
appear to be any actual risk, so let's just initialize these
variables to 0 to silence the compiler warnings.
Discussion: https://postgr.es/m/20240317192927.GA3978212%40nathanxps13
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Allocate memory for the error message inside memory owned by the
JsonLexContext and move responsibility away from the caller for
freeing it. This means that we can partially revert b44669b2ca
as this is now safe to use in FRONTEND code. The motivation for
this comes from the OAuth and incremental JSON patchsets but it
also adds value on its own.
Author: Jacob Champion <jacob.champion@enterprisedb.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CAOYmi+mWdTd6ujtyF7MsvXvk7ToLRVG_tYAcaGbQLvf=N4KrQw@mail.gmail.com
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Coverity started complaining about this after cc5ef90ed.
The code's not really different from before, but might
as well clarify its intent.
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Commit c649fa24a4 broke PDF generation, due to a misplaced id
attribute.
Per buildfarm member crake.
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This allows a RETURNING clause to be appended to a MERGE query, to
return values based on each row inserted, updated, or deleted. As with
plain INSERT, UPDATE, and DELETE commands, the returned values are
based on the new contents of the target table for INSERT and UPDATE
actions, and on its old contents for DELETE actions. Values from the
source relation may also be returned.
As with INSERT/UPDATE/DELETE, the output of MERGE ... RETURNING may be
used as the source relation for other operations such as WITH queries
and COPY commands.
Additionally, a special function merge_action() is provided, which
returns 'INSERT', 'UPDATE', or 'DELETE', depending on the action
executed for each row. The merge_action() function can be used
anywhere in the RETURNING list, including in arbitrary expressions and
subqueries, but it is an error to use it anywhere outside of a MERGE
query's RETURNING list.
Dean Rasheed, reviewed by Isaac Morland, Vik Fearing, Alvaro Herrera,
Gurjeet Singh, Jian He, Jeff Davis, Merlin Moncure, Peter Eisentraut,
and Wolfgang Walther.
Discussion: http://postgr.es/m/CAEZATCWePEGQR5LBn-vD6SfeLZafzEm2Qy_L_Oky2=qw2w3Pzg@mail.gmail.com
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This allows setting attstattarget when a relation is created.
We make use of this by having index_concurrently_create_copy() copy
over the attstattarget values when the new index is created, instead
of having index_concurrently_swap() fix it up later.
Reviewed-by: Tomas Vondra <tomas.vondra@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/4da8d211-d54d-44b9-9847-f2a9f1184c76@eisentraut.org
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DDL code uses tuple descriptors to pass around pg_attribute values
during table and index creation. But tuple descriptors don't include
the variable-length/nullable columns of pg_attribute, so they have to
be handled separately. Right now, the attoptions field is handled in
a one-off way with a separate argument passed to
InsertPgAttributeTuples(). The other affected fields of pg_attribute
are right now not needed at relation creation time.
The goal of this patch is to generalize this to allow handling
additional variable-length/nullable columns of pg_attribute in a
similar manner. For that, create a new struct
FormExtraData_pg_attribute, which is to be passed around in parallel
to the tuple descriptor and optionally supplies the additional
columns. Right now, this struct only contains one field for
attoptions, so no functionality is actually changed by this.
Reviewed-by: Tomas Vondra <tomas.vondra@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/4da8d211-d54d-44b9-9847-f2a9f1184c76@eisentraut.org
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To match attstattarget change (commit 4f622503d6d). The logic inside
CreateStatistics() is clarified a bit compared to that previous patch,
and so here we also update ATExecSetStatistics() to match.
Reviewed-by: Tomas Vondra <tomas.vondra@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/4da8d211-d54d-44b9-9847-f2a9f1184c76@eisentraut.org
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Given a subplan in a MERGE query, EXPLAIN would sometimes fail to
properly display expressions involving Params referencing variables in
other parts of the plan tree.
This would affect subplans outside the topmost join plan node, for
which expansion of Params would go via the top-level ModifyTable plan
node. The problem was that "inner_tlist" for the ModifyTable node's
deparse_namespace was set to the join node's targetlist, but
"inner_plan" was set to the ModifyTable node itself, rather than the
join node, leading to incorrect results when descending to the
referenced variable.
Fix and backpatch to v15, where MERGE was introduced.
Discussion: https://postgr.es/m/CAEZATCWAv-sZuH%2BwG5xJ-%2BGt7qGNGX8wUQd3XYydMFDKgRB9nw%40mail.gmail.com
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This introduces a new function equalRowTypes() that is effectively a
subset of equalTupleDescs() but only compares the number of attributes
and attribute name, type, typmod, and collation. This is enough for
most existing uses of equalTupleDescs(), which are changed to use the
new function. The only remaining callers of equalTupleDescs() are
those that really want to check the full tuple descriptor as such,
without concern about record or row or record type semantics.
The existing function hashTupleDesc() is renamed to hashRowType(),
because it now corresponds more to equalRowTypes().
The purpose of this change is to be clearer about the semantics of the
equality asked for by each caller. (At least one caller had a comment
that questioned whether equalTupleDescs() was too restrictive.) For
example, 4f622503d6d removed attstattarget from the tuple descriptor
structure. It was not fully clear at the time how this should affect
equalTupleDescs(). Now the answer is clear: By their own definitions,
equalRowTypes() does not care, and equalTupleDescs() just compares
whatever is in the tuple descriptor but does not care why it is in
there.
Reviewed-by: Tomas Vondra <tomas.vondra@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/f656d6d9-6660-4518-a006-2f65cafbebd1%40eisentraut.org
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destroyStringInfo() is a counterpart to makeStringInfo(), freeing a
palloc'd StringInfo and its data. This is a convenience function to
align the StringInfo API with the PQExpBuffer API. Originally added
in the OAuth patchset, it was extracted and committed separately in
order to aid upcoming JSON work.
Author: Daniel Gustafsson <daniel@yesql.se>
Author: Jacob Champion <jacob.champion@enterprisedb.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CAOYmi+mWdTd6ujtyF7MsvXvk7ToLRVG_tYAcaGbQLvf=N4KrQw@mail.gmail.com
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psql has the :{?name} syntax for testing for a psql variable existence. This
commit implements a tab completion for this syntax. Notably, in order to
implement this we have to remove '{' from WORD_BREAKS. It appears that
'{' here from the very beginning and it comes from the default value of
rl_basic_word_break_characters. And :{?name} is the only psql syntax using
the '{' sign. So, removing it from WORD_BREAKS shouldn't break anything.
Discussion: https://postgr.es/m/CAGRrpzZU48F2oV3d8eDLr%3D4TU9xFH5Jt9ED%2BqU1%2BX91gMH68Sw%40mail.gmail.com
Author: Steve Chavez
Reviewed-by: Erik Wienhold
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Reported-by: Alexander Lakhin
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Commit c855872074b introduced a new parameter to pg_regress to set
the directory where to look for expected files, but accidentally
only implemented it for when compiling pg_regress for ECPG tests.
Fix by adding support for the parameter to the main regression test
compilation of pg_regress as well.
Backpatch to v16 where --expecteddir was introduced.
Author: Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com>
Discussion: https://postgr.es/m/CAO6_Xqq5yKJHcJsq__LPcKwSY0XHRqVERNWGxx5ttNXXj7+W=A@mail.gmail.com
Backpatch-through: 16
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Per Tom Lane's observation that the test got stuck in infinite loop if
the injection_points module was not loaded. It was supposed to give up
after 10000 iterations, but the backstop was broken.
Discussion: https://www.postgresql.org/message-id/2498595.1710511222%40sss.pgh.pa.us
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The buildfarm script attempts to run all tests marked as
NO_INSTALLCHECK under src/test/modules without paying attention to
whether they are enabled or disabled in the parent Makefile. That
hasn't been a problem so far, because all the tests marked with
NO_INSTALLCHECK ran unconditionally in "make check". But commit
e2e3b8ae9e changed that: the injection fault tests are marked as
NO_INSTALLCHECK, and also depend on --enable-injection-points.
Try to work around that by ensuring that "make check" does nothing in
the those subdirectories. We can hopefully get rid of this hack soon,
after fixing the buildfarm client, or by switching to meson.
Discussion: https://www.postgresql.org/message-id/8e4cf596-dd70-432e-9068-16466ed596ed%40iki.fi
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Reported-by: Kyotaro Horiguchi
Discussion: https://postgr.es/m/20240315.104235.1835366724413653745.horikyota.ntt%40gmail.com
Author: Andrey Borodin
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The interruption handler within the injection point can get stuck in an
infinite loop while handling transaction timeout. To avoid this situation
we reset the timeout flag before invoking the injection point.
Author: Alexander Korotkov
Reviewed-by: Andrey Borodin
Discussion: https://postgr.es/m/ZfPchPC6oNN71X2J%40paquier.xyz
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"Worker" could also mean autovacuum worker or slot sync worker, so
let's be more explicit.
Per Tristan Partin's suggestion.
Discussion: https://www.postgresql.org/message-id/CZM6WDX5H4QI.NZG1YUCKWLA@neon.tech
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The 'gin' test injections faults to GIN index build. If another test
running concurrently in the same cluster also tries to create a GIN
index, it will hit the fault, too.
To fix, disable tests using injection points when running against an
existing cluster. A better long-term solution would be to make the
injection points scoped to the database or process, but this will do
for now.
Discussion: https://www.postgresql.org/message-id/CA%2BhUKGJYhcG_o2nwSK6r01eOZJwNWUJUbX%3D%3DAVnW84f-%2B8yamQ@mail.gmail.com
Discussion: https://www.postgresql.org/message-id/10fd6cdd-c5d9-46fe-9fa1-7e661191309e@iki.fi
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There are currently no tests for the low-level backup method where
pg_backup_start() and pg_backup_stop() are involved while taking a
file-system backup. The tests introduced in this commit rely on a
background psql process to make sure that the backup is taken while the
session doing the SQL start and stop calls remains alive.
Two cases are checked here with the backup taken:
- Recovery without a backup_label, leading to a corrupted state.
- Recovery with a backup_label, with a consistent state reached.
Both cases cross-check some patterns in the logs generated when running
recovery.
Compared to the first attempt in 99b4a63bef94, this includes a couple of
fixes making the CI stable (5 runs succeeded here):
- Add the file to the list of tests in meson.build.
- Race condition with the first WAL segment that we expect in the
primary's archives, by adding a poll on pg_stat_archiver. The second
segment with the checkpoint record is archived thanks to pg_backup_stop
waiting for it.
- Fix failure of test where the backup_label does not exist. The
cluster inherits the configuration of the first node; it was attempting
to store segments in the first node's archives, triggering failures with
copy on Windows.
- Fix failure of test on Windows because of incorrect parsing of the
backup_file in the success case. The data of the backup_label file is
retrieved from the output pg_backup_stop() from a BackgroundPsql written
directly to the backup's data folder. This would include CRLFs (\r\n),
causing the startup process to fail at the beginning of recovery when
parsing the backup_label because only LFs (\n) are allowed.
Author: David Steele
Discussion: https://postgr.es/m/f20fcc82-dadb-478d-beb4-1e2ffb0ace76@pgmasters.net
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The same pattern is used three times in dynahash.c to retrieve a bucket
number and a hash bucket from a hash value. This has popped up while
discussing improvements for the type cache, where this piece of
refactoring would become useful.
Note that hash_search_with_hash_value() does not need the bucket number,
just the hash bucket.
Author: Teodor Sigaev
Reviewed-by: Aleksander Alekseev, Michael Paquier
Discussion: https://postgr.es/m/5812a6e5-68ae-4d84-9d85-b443176966a1@sigaev.ru
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