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explain.c has grown rather large, so move various functions that
are principally concerned with output generation to a new source
file, explain_format.c, instead of lumping them in with everything
else that is part of explain.c
Reviewed-by: Peter Geoghegan <pg@bowt.ie>
Discussion: http://postgr.es/m/CA+TgmoYutMw1Jgo8BWUmB3TqnOhsEAJiYO=rOQufF4gPLWmkLQ@mail.gmail.com
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Commit ddb17e387aa28d61521227377b00f997756b8a27 attempted to avoid
confusing users by displaying digits after the decimal point only when
nloops > 1, since it's impossible to have a fraction row count after a
single iteration. However, this made the regression tests unstable since
parallal queries will have nloops>1 for all nodes below the Gather or
Gather Merge in normal cases, but if the workers don't start in time and
the leader finishes all the work, they will suddenly have nloops==1,
making it unpredictable whether the digits after the decimal point would
be displayed or not. Although 44cbba9a7f51a3888d5087fc94b23614ba2b81f2
seemed to fix the immediate failures, it may still be the case that there
are lower-probability failures elsewhere in the regression tests.
Various fixes are possible here. For example, it has previously been
proposed that we should try to display the digits after the decimal
point only if rows/nloops is an integer, but currently rows is storead
as a float so it's not theoretically an exact quantity -- precision
could be lost in extreme cases. It has also been proposed that we
should try to display the digits after the decimal point only if we're
under some sort of construct that could potentially cause looping
regardless of whether it actually does. While such ideas are not
without merit, this patch adopts the much simpler solution of always
display two decimal digits. If that approach stands up to scrutiny
from the buildfarm and human users, it spares us the trouble of doing
anything more complex; if not, we can reassess.
This commit incidentally reverts 44cbba9a7f51a3888d5087fc94b23614ba2b81f2,
which should no longer be needed.
Author: Robert Haas <robertmhaas@gmail.com>
Author: Ilia Evdokimov <ilya.evdokimov@tantorlabs.com>
Discussion: http://postgr.es/m/CA+TgmoazzVHn8sFOMFAEwoqBTDxKT45D7mvkyeHgqtoD2cn58Q@mail.gmail.com
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Stop comparing access method OID values against HASH_AM_OID and
BTREE_AM_OID, and instead check the IndexAmRoutine for an index to see
if it advertises its ability to perform the necessary ordering,
hashing, or cross-type comparing functionality. A field amcanorder
already existed, this uses it more widely. Fields amcanhash and
amcancrosscompare are added for the other purposes.
Author: Mark Dilger <mark.dilger@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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Concurrently dropping either the granted role or the grantee
does not stop GRANT from completing, instead resulting in a
dangling role reference in pg_auth_members. That's relatively
harmless in the short run, but inconsistent catalog entries
are not a good thing.
This patch solves the problem by adding the granted and grantee
roles as explicit shared dependencies of the pg_auth_members entry.
That's a bit indirect, but it works because the pg_shdepend code
applies the necessary locking and rechecking.
Commit 6566133c5 previously established similar handling for
the grantor column of pg_auth_members; it's not clear why it
didn't cover the other two role OID columns.
A side-effect of this approach is that DROP OWNED BY will now drop
pg_auth_members entries that mention the target role as either the
granted or grantee role. That's clearly appropriate for the
grantee, since we'll drop its other privileges too. It doesn't
seem too far out of line for the granted role, since we're
presumably about to drop it and besides we're removing all reasons
why it'd matter to be a member of it. (One could argue that this
makes DropRole's code to auto-drop pg_auth_members entries
unnecessary, but I chose to leave it in place since perhaps some
people's workflows expect that to work without a DROP OWNED BY.)
Note to patch readers: CreateRole's first CommandCounterIncrement
call is now unconditional, because this change creates another
case in which it's needed, and it seemed to be more trouble than
it's worth to preserve that micro-optimization.
Arguably this is a bug fix, but the fact that it changes the
expected contents of pg_shdepend seems like not a great thing
to do in the stable branches, and perhaps we don't want the
change in DROP OWNED BY semantics there either. On the other
hand, I opted not to force a catversion bump in HEAD, because
the presence or absence of these entries doesn't matter for
most purposes.
Reported-by: Virender Singla <virender.cse@gmail.com>
Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at>
Discussion: https://postgr.es/m/CAM6Zo8woa62ZFHtMKox6a4jb8qQ=w87R2L0K8347iE-juQL2EA@mail.gmail.com
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When nloops > 1, we now display two digits after the decimal point,
rather than none. This is important because what we print is actually
planstate->instrument->ntuples / nloops, and sometimes what you want
to know is planstate->instrument->ntuples. You can estimate that by
multiplying the displayed row count by the displayed nloops value, but
the fact that the displayed value is rounded makes that inexact. It's
still inexact even if we show these two extra decimal places, but less
so. Perhaps we will agree on a way to further improve this output later,
but for now this seems better than doing nothing.
Author: Ibrar Ahmed <ibrar.ahmad@gmail.com>
Author: Ilia Evdokimov <ilya.evdokimov@tantorlabs.com>
Reviewed-by: David G. Johnston <david.g.johnston@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Vignesh C <vignesh21@gmail.com>
Reviewed-by: Greg Stark <stark@mit.edu>
Reviewed-by: Naeem Akhter <akhternaeem@gmail.com>
Reviewed-by: Hamid Akhtar <hamid.akhtar@percona.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Andrei Lepikhov <a.lepikhov@postgrespro.ru>
Reviewed-by: Guillaume Lelarge <guillaume@lelarge.info>
Reviewed-by: Matheus Alcantara <matheusssilv97@gmail.com>
Reviewed-by: Alena Rybakina <a.rybakina@postgrespro.ru>
Discussion: http://postgr.es/m/603c8f070905281830g2e5419c4xad2946d149e21f9d%40mail.gmail.com
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Previously, a WARNING was issued at the time of defining a subscription
with origin=NONE only when the publisher subscribed to the same table from
other publishers, indicating potential data origination from different
origins. However, the publisher can subscribe to the partition ancestors
or partition children of the table from other publishers, which could also
result in mixed-origin data inclusion. So, give a WARNING in those cases
as well.
Reported-by: Sergey Tatarintsev <s.tatarintsev@postgrespro.ru>
Author: Hou Zhijie <houzj.fnst@fujitsu.com>
Author: Shlok Kyal <shlok.kyal.oss@gmail.com>
Reviewed-by: Vignesh C <vignesh21@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Backpatch-through: 16, where it was introduced
Discussion: https://postgr.es/m/5eda6a9c-63cf-404d-8a49-8dcb116a29f3@postgrespro.ru
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The type argument wasn't actually really necessary. It was a remnant
of converting the API of the gist strategy translation from using
opclass to using opfamily+opcintype (commits c09e5a6a016,
622f678c102). For looking up the gist translation function, we used
the convention "amproclefttype = amprocrighttype = opclass's
opcintype" (see pg_amproc.h). But each operator family should only
have one translation function, and getting the right type for the
lookup is sometimes cumbersome and fragile, so this is all
unnecessarily complicated.
To simplify this, change the gist stategy support procedure to take
"any", "any" as argument. (This is arbitrary but seems intuitive.
The alternative of using InvalidOid as argument(s) upsets various DDL
commands, so it's not practical.) Then we don't need opcintype for
the lookup, and we can remove it from all the API layers introduced by
commit c09e5a6a016.
This also adds some more documentation about the correct signature of
the gist support function and adds more checks in gistvalidate().
This was previously underspecified. (It relied implicitly on
convention mentioned above.)
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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Before executing a cached generic plan, AcquireExecutorLocks() in
plancache.c locks all relations in a plan's range table to ensure the
plan is safe for execution. However, this locks runtime-prunable
relations that will later be pruned during "initial" runtime pruning,
introducing unnecessary overhead.
This commit defers locking for such relations to executor startup and
ensures that if the CachedPlan is invalidated due to concurrent DDL
during this window, replanning is triggered. Deferring these locks
avoids unnecessary locking overhead for pruned partitions, resulting
in significant speedup, particularly when many partitions are pruned
during initial runtime pruning.
* Changes to locking when executing generic plans:
AcquireExecutorLocks() now locks only unprunable relations, that is,
those found in PlannedStmt.unprunableRelids (introduced in commit
cbc127917e), to avoid locking runtime-prunable partitions
unnecessarily. The remaining locks are taken by
ExecDoInitialPruning(), which acquires them only for partitions that
survive pruning.
This deferral does not affect the locks required for permission
checking in InitPlan(), which takes place before initial pruning.
ExecCheckPermissions() now includes an Assert to verify that all
relations undergoing permission checks, none of which can be in the
set of runtime-prunable relations, are properly locked.
* Plan invalidation handling:
Deferring locks introduces a window where prunable relations may be
altered by concurrent DDL, invalidating the plan. A new function,
ExecutorStartCachedPlan(), wraps ExecutorStart() to detect and handle
invalidation caused by deferred locking. If invalidation occurs,
ExecutorStartCachedPlan() updates CachedPlan using the new
UpdateCachedPlan() function and retries execution with the updated
plan. To ensure all code paths that may be affected by this handle
invalidation properly, all callers of ExecutorStart that may execute a
PlannedStmt from a CachedPlan have been updated to use
ExecutorStartCachedPlan() instead.
UpdateCachedPlan() replaces stale plans in CachedPlan.stmt_list. A new
CachedPlan.stmt_context, created as a child of CachedPlan.context,
allows freeing old PlannedStmts while preserving the CachedPlan
structure and its statement list. This ensures that loops over
statements in upstream callers of ExecutorStartCachedPlan() remain
intact.
ExecutorStart() and ExecutorStart_hook implementations now return a
boolean value indicating whether plan initialization succeeded with a
valid PlanState tree in QueryDesc.planstate, or false otherwise, in
which case QueryDesc.planstate is NULL. Hook implementations are
required to call standard_ExecutorStart() at the beginning, and if it
returns false, they should do the same without proceeding.
* Testing:
To verify these changes, the delay_execution module tests scenarios
where cached plans become invalid due to changes in prunable relations
after deferred locks.
* Note to extension authors:
ExecutorStart_hook implementations must verify plan validity after
calling standard_ExecutorStart(), as explained earlier. For example:
if (prev_ExecutorStart)
plan_valid = prev_ExecutorStart(queryDesc, eflags);
else
plan_valid = standard_ExecutorStart(queryDesc, eflags);
if (!plan_valid)
return false;
<extension-code>
return true;
Extensions accessing child relations, especially prunable partitions,
via ExecGetRangeTableRelation() must now ensure their RT indexes are
present in es_unpruned_relids (introduced in commit cbc127917e), or
they will encounter an error. This is a strict requirement after this
change, as only relations in that set are locked.
The idea of deferring some locks to executor startup, allowing locks
for prunable partitions to be skipped, was first proposed by Tom Lane.
Reviewed-by: Robert Haas <robertmhaas@gmail.com> (earlier versions)
Reviewed-by: David Rowley <dgrowleyml@gmail.com> (earlier versions)
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> (earlier versions)
Reviewed-by: Tomas Vondra <tomas@vondra.me>
Reviewed-by: Junwang Zhao <zhjwpku@gmail.com>
Discussion: https://postgr.es/m/CA+HiwqFGkMSge6TgC9KQzde0ohpAycLQuV7ooitEEpbKB0O_mg@mail.gmail.com
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Replace the use of Constraint with a new ATAlterConstraint struct, which
allows us to pass additional information. No functionality is added by
this commit. This is necessary for future work that allows altering
constraints in other ways.
I (Álvaro) took the liberty of restructuring the code for ALTER
CONSTRAINT beyond what Amul did. The original coding before Amul's
patch was unnecessarily baroque, and this change makes things simpler
by removing one level of subroutine. Also, partly remove the assumption
that only partitioned tables are relevant (by passing sensible 'recurse'
arguments) and no longer ignore whether ONLY was specified. I say
'partly' because the current coding only walks down via the 'conparentid'
relationship, which is only used for partitioned tables; but future
patches could handle ONLY or not for other types of constraint changes
for legacy inheritance trees too.
Author: Amul Sul <sulamul@gmail.com>
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/CAAJ_b94bfgPV-8Mw_HwSBeheVwaK9=5s+7+KbBj_NpwXQFgDGg@mail.gmail.com
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This commit adds the information about the number of times WAL buffers
have been full to the logs generated by VACUUM/ANALYZE (VERBOSE) and in
the logs generated by autovacuum, complementing the existing information
stored by WalUsage.
This is the last part of the backend code where the value of
wal_buffers_full can be reported, similarly to all the other fields of
WalUsage. 320545bfcfee and ce5bcc4a9f26 have done the same for EXPLAIN
and pgss.
Author: Bertrand Drouvot
Reviewed-by: Ilia Evdokimov
Discussion: https://postgr.es/m/Z6SOha5YFFgvpwQY@ip-10-97-1-34.eu-west-3.compute.internal
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This is similar to ce5bcc4a9f26, relying on the addition of
wal_buffers_full to WalUsage. This time, the information is added to
the output generated by EXPLAIN (WAL).
Author: Bertrand Drouvot
Reviewed-by: Ilia Evdokimov
Discussion: https://postgr.es/m/Z6SOha5YFFgvpwQY@ip-10-97-1-34.eu-west-3.compute.internal
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Commit bb8dff9995 added this information to the
pg_stat_progress_vacuum and pg_stat_progress_analyze system views.
This commit adds the same information to the output of VACUUM and
ANALYZE with the VERBOSE option and to the autovacuum logs.
Suggested-by: Masahiro Ikeda <ikedamsh@oss.nttdata.com>
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/ZmaXmWDL829fzAVX%40ip-10-97-1-34.eu-west-3.compute.internal
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This function's schemaOid parameter appears to have never been used
for anything.
Author: Yugo Nagata <nagata@sraoss.co.jp>
Reviewed-by: Fabrízio de Royes Mello <fabriziomello@gmail.com>
Discussion: https://postgr.es/m/20250214010218.550ebe4ec1a7c7811a7fa2bb%40sraoss.co.jp
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Remove (char *) casts no longer needed after XLogRegisterData() and
XLogRegisterBufData() argument type change.
Reviewed-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Discussion: https://www.postgresql.org/message-id/flat/fd1fcedb-3492-4fc8-9e3e-74b97f2db6c7%40eisentraut.org
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When an UPDATE trigger referencing a new table and a DELETE trigger
referencing an old table are both present, MakeTransitionCaptureState()
returns an inconsistent result for UPDATE commands in its set of flags
and tuplestores holding the TransitionCaptureState for transition
tables.
As proved by the test added here, this issue causes a crash in v14 and
earlier versions (down to 11, actually, older versions do not support
triggers on partitioned tables) during cross-partition updates on a
partitioned table. v15 and newer versions are safe thanks to
7103ebb7aae8.
This commit fixes the function so that it returns a consistent state
by using portions of the changes made in commit 7103ebb7aae8 for v13 and
v14. v15 and newer versions are slightly tweaked to match with the
older versions, mainly for consistency across branches.
Author: Kyotaro Horiguchi
Discussion: https://postgr.es/m/20250207.150238.968446820828052276.horikyota.ntt@gmail.com
Backpatch-through: 13
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This commit adds the amount of time spent sleeping due to
cost-based delay to the pg_stat_progress_vacuum and
pg_stat_progress_analyze system views. A new configuration
parameter named track_cost_delay_timing, which is off by default,
controls whether this information is gathered. For vacuum, the
reported value includes the sleep time of any associated parallel
workers. However, parallel workers only report their sleep time
once per second to avoid overloading the leader process.
Bumps catversion.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Co-authored-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Sami Imseih <samimseih@gmail.com>
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Masahiro Ikeda <ikedamsh@oss.nttdata.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: Sergei Kornilov <sk@zsrv.org>
Discussion: https://postgr.es/m/ZmaXmWDL829fzAVX%40ip-10-97-1-34.eu-west-3.compute.internal
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This function is used in both vacuum and analyze code paths, and a
follow-up commit will require distinguishing between the two. This
commit forces callers to specify whether they are in a vacuum or
analyze path, but it does not use that information for anything
yet.
Author: Nathan Bossart <nathandbossart@gmail.com>
Co-authored-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/ZmaXmWDL829fzAVX%40ip-10-97-1-34.eu-west-3.compute.internal
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Aggressive vacuums must scan every unfrozen tuple in order to advance
the relfrozenxid/relminmxid. Because data is often vacuumed before it is
old enough to require freezing, relations may build up a large backlog
of pages that are set all-visible but not all-frozen in the visibility
map. When an aggressive vacuum is triggered, all of these pages must be
scanned. These pages have often been evicted from shared buffers and
even from the kernel buffer cache. Thus, aggressive vacuums often incur
large amounts of extra I/O at the expense of foreground workloads.
To amortize the cost of aggressive vacuums, eagerly scan some
all-visible but not all-frozen pages during normal vacuums.
All-visible pages that are eagerly scanned and set all-frozen in the
visibility map are counted as successful eager freezes and those not
frozen are counted as failed eager freezes.
If too many eager scans fail in a row, eager scanning is temporarily
suspended until a later portion of the relation. The number of failures
tolerated is configurable globally and per table.
To effectively amortize aggressive vacuums, we cap the number of
successes as well. Capping eager freeze successes also limits the amount
of potentially wasted work if these pages are modified again before the
next aggressive vacuum. Once we reach the maximum number of blocks
successfully eager frozen, eager scanning is disabled for the remainder
of the vacuum of the relation.
Original design idea from Robert Haas, with enhancements from
Andres Freund, Tomas Vondra, and me
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Robert Treat <rob@xzilla.net>
Reviewed-by: Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/flat/CAAKRu_ZF_KCzZuOrPrOqjGVe8iRVWEAJSpzMgRQs%3D5-v84cXUg%40mail.gmail.com
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Previously, only btrees were supported as the referenced unique index
for foreign keys because there was no way to get the equality strategy
number for other index methods. We have this now (commit
c09e5a6a016), so we can support this. In fact, this is now just a
special case of the existing generalized "period" foreign key
support, since that already knows how to lookup equality strategy
numbers.
Note that this does not change the requirement that the referenced
index needs to be unique, and at the moment, only btree supports that,
so this does not change anything in practice, but it would allow
another index method that has amcanunique to be supported.
Co-authored-by: Mark Dilger <mark.dilger@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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This adds a new variant of generated columns that are computed on read
(like a view, unlike the existing stored generated columns, which are
computed on write, like a materialized view).
The syntax for the column definition is
... GENERATED ALWAYS AS (...) VIRTUAL
and VIRTUAL is also optional. VIRTUAL is the default rather than
STORED to match various other SQL products. (The SQL standard makes
no specification about this, but it also doesn't know about VIRTUAL or
STORED.) (Also, virtual views are the default, rather than
materialized views.)
Virtual generated columns are stored in tuples as null values. (A
very early version of this patch had the ambition to not store them at
all. But so much stuff breaks or gets confused if you have tuples
where a column in the middle is completely missing. This is a
compromise, and it still saves space over being forced to use stored
generated columns. If we ever find a way to improve this, a bit of
pg_upgrade cleverness could allow for upgrades to a newer scheme.)
The capabilities and restrictions of virtual generated columns are
mostly the same as for stored generated columns. In some cases, this
patch keeps virtual generated columns more restricted than they might
technically need to be, to keep the two kinds consistent. Some of
that could maybe be relaxed later after separate careful
considerations.
Some functionality that is currently not supported, but could possibly
be added as incremental features, some easier than others:
- index on or using a virtual column
- hence also no unique constraints on virtual columns
- extended statistics on virtual columns
- foreign-key constraints on virtual columns
- not-null constraints on virtual columns (check constraints are supported)
- ALTER TABLE / DROP EXPRESSION
- virtual column cannot have domain type
- virtual columns are not supported in logical replication
The tests in generated_virtual.sql have been copied over from
generated_stored.sql with the keyword replaced. This way we can make
sure the behavior is mostly aligned, and the differences can be
visible. Some tests for currently not supported features are
currently commented out.
Reviewed-by: Jian He <jian.universality@gmail.com>
Reviewed-by: Dean Rasheed <dean.a.rasheed@gmail.com>
Tested-by: Shlok Kyal <shlok.kyal.oss@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/a368248e-69e4-40be-9c07-6c3b5880b0a6@eisentraut.org
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This commit introduces changes to track unpruned relations explicitly,
making it possible for top-level plan nodes, such as ModifyTable and
LockRows, to avoid processing partitions pruned during initial
pruning. Scan-level nodes, such as Append and MergeAppend, already
avoid the unnecessary processing by accessing partition pruning
results directly via part_prune_index. In contrast, top-level nodes
cannot access pruning results directly and need to determine which
partitions remain unpruned.
To address this, this commit introduces a new bitmapset field,
es_unpruned_relids, which the executor uses to track the set of
unpruned relations. This field is referenced during plan
initialization to skip initializing certain nodes for pruned
partitions. It is initialized with PlannedStmt.unprunableRelids,
a new field that the planner populates with RT indexes of relations
that cannot be pruned during runtime pruning. These include relations
not subject to partition pruning and those required for execution
regardless of pruning.
PlannedStmt.unprunableRelids is computed during set_plan_refs() by
removing the RT indexes of runtime-prunable relations, identified
from PartitionPruneInfos, from the full set of relation RT indexes.
ExecDoInitialPruning() then updates es_unpruned_relids by adding
partitions that survive initial pruning.
To support this, PartitionedRelPruneInfo and PartitionedRelPruningData
now include a leafpart_rti_map[] array that maps partition indexes to
their corresponding RT indexes. The former is used in set_plan_refs()
when constructing unprunableRelids, while the latter is used in
ExecDoInitialPruning() to convert partition indexes returned by
get_matching_partitions() into RT indexes, which are then added to
es_unpruned_relids.
These changes make it possible for ModifyTable and LockRows nodes to
process only relations that remain unpruned after initial pruning.
ExecInitModifyTable() trims lists, such as resultRelations,
withCheckOptionLists, returningLists, and updateColnosLists, to
consider only unpruned partitions. It also creates ResultRelInfo
structs only for these partitions. Similarly, child RowMarks for
pruned relations are skipped.
By avoiding unnecessary initialization of structures for pruned
partitions, these changes improve the performance of updates and
deletes on partitioned tables during initial runtime pruning.
Due to ExecInitModifyTable() changes as described above, EXPLAIN on a
plan for UPDATE and DELETE that uses runtime initial pruning no longer
lists partitions pruned during initial pruning.
Reviewed-by: Robert Haas <robertmhaas@gmail.com> (earlier versions)
Reviewed-by: Tomas Vondra <tomas@vondra.me>
Discussion: https://postgr.es/m/CA+HiwqFGkMSge6TgC9KQzde0ohpAycLQuV7ooitEEpbKB0O_mg@mail.gmail.com
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This didn't actually work: the COPY succeeds, but the FREEZE
optimization isn't applied. There doesn't seem to be an easy way
to support FREEZE on foreign tables, so let's follow the precedent
established by commit 5c9a5513a3 by raising an error early. This
is arguably a bug fix, but due to the lack of reports, the minimal
discussion on the mailing list, and the potential to break existing
scripts, I am not back-patching it for now.
Author: Sami Imseih <samimseih@gmail.com>
Reviewed-by: Zhang Mingli <zmlpostgres@gmail.com>
Discussion: https://postgr.es/m/CAA5RZ0ujeNgKpE3OrLtR%3DeJGa5LkGMekFzQTwjgw%3DrzaLufQLQ%40mail.gmail.com
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This turns GistTranslateCompareType() into a callback function of the
gist index AM instead of a standalone function. The existing callers
are changed to use IndexAmTranslateCompareType(). This then makes
that code not hardcoded toward gist.
This means in particular that the temporal keys code is now
independent of gist. Also, this generalizes commit 74edabce7a3, so
other index access methods other than the previously hardcoded ones
could now work as REPLICA IDENTITY in a logical replication
subscriber.
Author: Mark Dilger <mark.dilger@enterprisedb.com>
Co-authored-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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This refactors and simplifies various existing code to make use of the
new function.
Reviewed-by: Mark Dilger <mark.dilger@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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Follow up to commit 630f9a43cec. The previous name had become
confusing, because it doesn't actually translate a strategy number but
a CompareType into a strategy number. We might add the inverse at
some point, which would then probably be called something like
GistTranslateStratnum.
Reviewed-by: Mark Dilger <mark.dilger@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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Whilst working on commit 041e8b95b I happened to notice that
parallel_vacuum_main() assigns directly to the maintenance_work_mem
GUC. This is definitely not per project conventions, so I tried to
fix it to use SetConfigOption(). But that fails with "parameter
cannot be set during a parallel operation". It doesn't seem worth
working on a cleaner answer, at least not till we have a few more
instances of similar problems. But add some commentary, just so
nobody gets the idea that this is an approved way to set a GUC.
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Consistently use "Size" (or size_t, or in some places int64 or double)
as the type for variables holding memory allocation sizes. In most
places variables' data types were fine already, but we had an ancient
habit of computing bytes from kilobytes-units GUCs with code like
"work_mem * 1024L". That risks overflow on Win64 where they did not
make "long" as wide as "size_t". We worked around that by restricting
such GUCs' ranges, so you couldn't set work_mem et al higher than 2GB
on Win64. This patch removes that restriction, after replacing such
calculations with "work_mem * (Size) 1024" or variants of that.
It should be noted that this patch was constructed by searching
outwards from the GUCs that have MAX_KILOBYTES as upper limit.
So I can't positively guarantee there are no other places doing
memory-size arithmetic in int or long variables. I do however feel
pretty confident that increasing MAX_KILOBYTES on Win64 is safe now.
Also, nothing in our code should be dealing in multiple-gigabyte
allocations without authorization from a relevant GUC, so it seems
pretty likely that this search caught everything that could be at
risk of overflow.
Author: Vladlen Popolitov <v.popolitov@postgrespro.ru>
Co-authored-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/1a01f0-66ec2d80-3b-68487680@27595217
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The column added in commit e65dbc9927, pubgencols_type, was inconsistent
with the naming conventions of other columns in the pg_publication
catalog.
Author: Vignesh C <vignesh21@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Discussion: https://postgr.es/m/CALDaNm1u-ufVOW-RUsXSooqzkpohxfZYy=z78fbcr_9Pq5hbCg@mail.gmail.com
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This commit adds four fields to the statistics of relations, aggregating
the amount of time spent for each operation on a relation:
- total_vacuum_time, for manual vacuum.
- total_autovacuum_time, for vacuum done by the autovacuum daemon.
- total_analyze_time, for manual analyze.
- total_autoanalyze_time, for analyze done by the autovacuum daemon.
This gives users the option to derive the average time spent for these
operations with the help of the related "count" fields.
Bump catalog version (for the catalog changes) and PGSTAT_FILE_FORMAT_ID
(for the additions in PgStat_StatTabEntry).
Author: Sami Imseih
Reviewed-by: Bertrand Drouvot, Michael Paquier
Discussion: https://postgr.es/m/CAA5RZ0uVOGBYmPEeGF2d1B_67tgNjKx_bKDuL+oUftuoz+=Y1g@mail.gmail.com
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A ParseState exists in ATPrepAlterColumnType() since its introduction
in 077db40fa1f3, and it has never relied on a query string that could be
used to point at a location in the origin string on error.
The output of some regression tests are updated, showing the error
location where applicable. Six error strings are upgraded with the
error location.
Author: Jian He
Discussion: https://postgr.es/m/CACJufxGfbPfWLjcEz33G9eW_epDW0UDi2H05i9eSTPKGJ4rxSA@mail.gmail.com
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For commit b663b9436e75 I thought this was useless, but turns out not to
be for the case where a partitioned table has two identical foreign key
constraints which can both be matched by the same constraint in a
partition during attach. This CCI makes the match search for the second
constraint in the parent ignore the constraint in the child that has
already been matched by the first constraint in the parent.
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/c599253c-1ccd-4161-80fc-c9065e037a09@gmail.com
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With deferred triggers, it is possible that the current role changes
between the time when the trigger is queued and the time it is
executed (for example, the triggering data modification could have
been executed in a SECURITY DEFINER function).
Up to now, deferred trigger functions would run with the current role
set to whatever was active at commit time. That does not matter for
foreign-key constraints, whose correctness doesn't depend on the
current role. But for user-written triggers, the current role
certainly can matter.
Hence, fix things so that AFTER triggers are fired under the role
that was active when they were queued, matching the behavior of
BEFORE triggers which would have actually fired at that time.
(If the trigger function is marked SECURITY DEFINER, that of course
overrides this, as it always has.)
This does not create any new security exposure: if you do DML on a
table owned by a hostile user, that user has always had various ways
to exploit your permissions, such as the aforementioned BEFORE
triggers, default expressions, etc. It might remove some security
exposure, because the old behavior could potentially expose some
other role besides the one directly modifying the table.
There was discussion of making a larger change, such as running as
the trigger's owner. However, that would break the common idiom of
capturing the value of CURRENT_USER in a trigger for auditing/logging
purposes. This change will make no difference in the typical scenario
where the current role doesn't change before commit.
Arguably this is a bug fix, but it seems too big a semantic change
to consider for back-patching.
Author: Laurenz Albe <laurenz.albe@cybertec.at>
Reviewed-by: Joseph Koshakow <koshy44@gmail.com>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://postgr.es/m/77ee784cf248e842f74588418f55c2931e47bd78.camel@cybertec.at
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When scanning existing AfterTriggerSharedData records in search
of a match to the event being queued, we were examining the
records from oldest to newest. But it makes more sense to do
the opposite. The newest record is likely to be from the current
query, while the oldest is likely to be from some previous command
in the same transaction, which will likely have different details.
There aren't expected to be very many active AfterTriggerSharedData
records at once, so that this change is unlikely to make any
spectacular difference. Still, having added a nontrivially-expensive
bms_equal call to this loop yesterday, I feel a need to shave cycles
where possible.
Discussion: https://postgr.es/m/4166712.1737583961@sss.pgh.pa.us
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This feature was intentionally omitted when FKs were first implemented
for partitioned tables, and had been requested a few times; the
usefulness is clear.
Validation can happen for each partition individually, which is useful
to contain the number of locks held and the duration; or it can be
executed for the partitioning hierarchy as a single command, which
validates all child constraints that haven't been validated already.
This is also useful to implement NOT ENFORCED constraints on top.
Author: Amul Sul <sulamul@gmail.com>
Discussion: https://postgr.es/m/CAAJ_b96Bp=-ZwihPPtuaNX=SrZ0U6ZsXD3+fgARO0JuKa8v2jQ@mail.gmail.com
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The current boolean publish_generated_columns option only supports a
binary choice, which is insufficient for future enhancements where
generated columns can be of different types (e.g., stored or virtual). The
supported values for the publish_generated_columns option are 'none' and
'stored'.
Author: Vignesh C <vignesh21@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/d718d219-dd47-4a33-bb97-56e8fc4da994@eisentraut.org
Discussion: https://postgr.es/m/B80D17B2-2C8E-4C7D-87F2-E5B4BE3C069E@gmail.com
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This patch fixes two distinct errors that both ultimately trace
to commit 71d60e2aa, which added the ats_modifiedcols field.
The more severe error is that ats_modifiedcols wasn't accounted for
in afterTriggerAddEvent's scanning loop that looks for a pre-existing
duplicate AfterTriggerSharedData. Thus, a new event could be
incorrectly matched to an AfterTriggerSharedData that has a different
value of ats_modifiedcols, resulting in the wrong tg_updatedcols
bitmap getting passed to the trigger whenever it finally gets fired.
We'd not noticed because (a) few triggers consult tg_updatedcols,
and (b) we had no tests exercising a case where such a trigger was
called as an AFTER trigger. In the test case added by this commit,
contrib/lo's trigger fails to remove a large object when expected
because (without this fix) it thinks the LO OID column hasn't changed.
The other problem was introduced by commit ce5aaea8c, which copied the
modified-columns bitmap into trigger-related storage. It made a copy
for every trigger event, whereas what we really want is to make a new
copy only when we make a new AfterTriggerSharedData entry. (We could
imagine adding extra logic to reduce the number of bitmap copies still
more, but it doesn't look worthwhile at the moment.) In a simple test
of an UPDATE of 10000000 rows with a single AFTER trigger, this thinko
roughly tripled the amount of memory consumed by the pending-triggers
data structures, from 160446744 to 480443440 bytes.
Fixing the first problem requires introducing a bms_equal() call into
afterTriggerAddEvent's scanning loop, which is slightly annoying from
a speed perspective. However, getting rid of the excessive bms_copy()
calls from the second problem balances that out; overall speed of
trigger operations is the same or slightly better, in my tests.
Discussion: https://postgr.es/m/3496294.1737501591@sss.pgh.pa.us
Backpatch-through: 13
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In common cases, foreign keys are defined on the toplevel partitioned
table; but if instead one is defined on a partition and references a
partitioned table, and the referencing partition is detached, we would
examine the pg_constraint row on the partition being detached, and fail
to realize that the sub-constraints must be left alone. This causes the
ALTER TABLE DETACH process to fail with
ERROR: could not find ON INSERT check triggers of foreign key constraint NNN
This is similar but not quite the same as what was fixed by
53af9491a043. This bug doesn't affect branches earlier than 15, because
the detach procedure was different there, so we only backpatch down to
15.
Fix by skipping such modifying constraints that are children of other
constraints being detached.
Author: Amul Sul <sulamul@gmail.com>
Diagnosys-by: Sami Imseih <samimseih@gmail.com>
Discussion: https://postgr.es/m/CAAJ_b97GuPh6wQPbxQS-Zpy16Oh+0aMv-w64QcGrLhCOZZ6p+g@mail.gmail.com
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If a referenced UPDATE changes the temporal start/end times, shrinking
the span the row is valid, we get a false return from
ri_Check_Pk_Match(), but overlapping references may still be valid, if
their reference didn't overlap with the removed span.
We need to consider what span(s) are still provided in the referenced
table. Instead of returning that from ri_Check_Pk_Match(), we can
just look it up in the main SQL query.
Reported-by: Sam Gabrielsson <sam@movsom.se>
Author: Paul 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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If a time zone abbreviation used in datetime input is defined in
the currently active timezone, use that definition in preference
to looking in the timezone_abbreviations list. That allows us to
correctly handle abbreviations that have different meanings in
different timezones. Also, it eliminates an inconsistency between
datetime input and datetime output: the non-ISO datestyles for
timestamptz have always printed abbreviations taken from the IANA
data, not from timezone_abbreviations. Before this fix, it was
possible to demonstrate cases where casting a timestamp to text
and back fails or changes the value significantly because of that
inconsistency.
While this change removes the ability to override the IANA data about
an abbreviation known in the current zone, it's not clear that there's
any real use-case for doing so. But it is clear that this makes life
a lot easier for dealing with abbreviations that have conflicts across
different time zones.
Also update the pg_timezone_abbrevs view to report abbreviations
that are recognized via the IANA data, and *not* report any
timezone_abbreviations entries that are thereby overridden.
Under the hood, there are now two SRFs, one that pulls the IANA
data and one that pulls timezone_abbreviations entries. They're
combined by logic in the view. This approach was useful for
debugging (since the functions can be called on their own).
While I don't intend to document the functions explicitly,
they might be useful to call directly.
Also improve DecodeTimezoneAbbrev's caching logic so that it can
cache zone abbreviations found in the IANA data. Without that,
this patch would have caused a noticeable degradation of the
runtime of timestamptz_in.
Per report from Aleksander Alekseev and additional investigation.
Discussion: https://postgr.es/m/CAJ7c6TOATjJqvhnYsui0=CO5XFMF4dvTGH+skzB--jNhqSQu5g@mail.gmail.com
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With this, we have separate functions to add validation requests to
ALTER TABLE's phase 3 queue for check and foreign key constraints, which
allows reusing them in future commits -- particularly this will allow us
to perform validation of invalid foreign key constraints in partitioned
tables.
We could have let the check constraint code alone since we don't need to
reuse that for anything at this point, but it seems cleaner and more
consistent to do both at the same time.
Author: Amul Sul <sulamul@gmail.com>
Discussion: https://postgr.es/m/CAAJ_b96Bp=-ZwihPPtuaNX=SrZ0U6ZsXD3+fgARO0JuKa8v2jQ@mail.gmail.com
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As of commit 9895b35cb88, AlterDomainAddConstraint() can only be
called with constraints of type CONSTR_CHECK and CONSTR_NOTNULL. So
all the code to check for and reject other constraint type values is
dead and can be removed.
Author: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CACJufxHitd5LGLBSSAPShhtDWxT0ViVKTHinkYW-skBX93TcpA@mail.gmail.com
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This splits out a couple of subroutines from
ATExecAlterConstrRecurse(). This makes the main function a bit
smaller, and a future patch (NOT ENFORCED foreign-key constraints)
will also want to call some of the pieces separately.
Author: Amul Sul <amul.sul@enterprisedb.com>
Reviewed-by: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAAJ_b962c5AcYW9KUt_R_ER5qs3fUGbe4az-SP-vuwPS-w-AGA%40mail.gmail.com
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This changes commit 7406ab623fe in that the gist strategy number
mapping support function is changed to use the CompareType enum as
input, instead of the "well-known" RT*StrategyNumber strategy numbers.
This is a bit cleaner, since you are not dealing with two sets of
strategy numbers. Also, this will enable us to subsume this system
into a more general system of using CompareType to define operator
semantics across index methods.
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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This adds support for the NOT ENFORCED/ENFORCED flag for constraints,
with support for check constraints.
The plan is to eventually support this for foreign key constraints,
where it is typically more useful.
Note that CHECK constraints do not currently support ALTER operations,
so changing the enforceability of an existing constraint isn't
possible without dropping and recreating it. This could be added
later.
Author: Amul Sul <amul.sul@enterprisedb.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: jian he <jian.universality@gmail.com>
Tested-by: Triveni N <triveni.n@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/CAAJ_b962c5AcYW9KUt_R_ER5qs3fUGbe4az-SP-vuwPS-w-AGA@mail.gmail.com
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cluster_rel() receives the OID of the relation to process, which it
opens and locks; but then its subroutine copy_table_data() also receives
the relation OID and opens it by itself. This is a bit wasteful. It's
better to have cluster_rel() receive the relation already open, and pass
it down to its subroutines as necessary; then cluster_rel closes the rel
before returning. This simplifies things.
But a better motivation to make this change is that a future command to
do logical-decoding-based "concurrent VACUUM FULL" will need to release
all locks on the relation (and possibly on the clustering index) at some
point. Since it makes little sense to keep the relation reference
without the lock, the cluster_rel() function will also close it (and
the index). With this arrangement, neither the function nor its
subroutines need open extra references, which, again, makes things simpler.
Author: Antonin Houska <ah@cybertec.at>
Discussion: https://postgr.es/m/82651.1720540558@antos
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This error message stated the privileges required to add a member
to a group even if the user was trying to drop a member:
postgres=> alter group a drop user b;
ERROR: permission denied to alter role
DETAIL: Only roles with the ADMIN option on role "a" may add members.
Since the required privileges for both operations are the same, we
can fix this by modifying the message to mention both adding and
dropping members:
postgres=> alter group a drop user b;
ERROR: permission denied to alter role
DETAIL: Only roles with the ADMIN option on role "a" may add or drop members.
Author: ChangAo Chen
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/tencent_FAA0D00E3514AAF0BBB6322542A6094FEF05%40qq.com
Backpatch-through: 16
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This function doesn't need the lockmode to be passed: it was being used
to lock the new heap, but that's bogus, because the only caller has
already obtained the appropriate lock on the new heap (which is
unimportant anyway, because the relation's creation is not yet committed
and so no other session can see it).
Noticed while reviewed Antonin Houska's patch to add VACUUM FULL
CONCURRENTLY.
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Commit 14e87ffa5c54 needlessly added support for CONSTR_NOTNULL entries
to StoreConstraints. It's dead code, so remove it.
To make the situation regarding constraint creation clearer, change
comments in heap_create_with_catalog, StoreConstraints, MergeAttributes
to explain which types of constraint are used on each.
Author: 何建 (Jian He) <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxFxzqrCiUNfjJ0tQU+=nKQkQCGtGzUBude=SMOwj5VNjQ@mail.gmail.com
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Author: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/5812a0b9-b0cf-4151-9a14-d9f00e4f2858@gmail.com
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Backpatch-through: 13
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