It is possible for certain cases to remove not-null constraints without
maintaining the attnotnull in its correct state; for example if you drop
a column that's part of the primary key, and the other columns of the PK don't
have not-null constraints, then we should reset the attnotnull flags for
those other columns; up to this commit, we didn't. Handle those cases
better by doing the attnotnull reset in RemoveConstraintById() instead
of in dropconstraint_internal().
However, there are some cases where we must not do so. For example if
those other columns are in replica identity indexes or are generated
identity columns, we must keep attnotnull set, even though it results in
the catalog inconsistency that no not-null constraint supports that.
Because the attnotnull reset now happens in more places than before, for
instance when a column of the primary key changes type, we need an
additional trick to reinstate it as necessary. Introduce a new
alter-table pass that does this, which needs simply reschedule some
AT_SetAttNotNull subcommands that were already being generated and
ignored.
Because of the exceptions in which attnotnull is not reset noted above,
we also include a pg_dump hack to include a not-null constraint when the
attnotnull flag is set even if no pg_constraint row exists. This part
is undesirable but necessary, because failing to handle the case can
result in unrestorable dumps.
Reported-by: Tender Wang <tndrwang@gmail.com>
Co-authored-by: Tender Wang <tndrwang@gmail.com>
Reviewed-by: jian he <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CAHewXN=hMbNa3d43NOR=OCgdgpTt18S-1fmueCoEGesyeK4bqw@mail.gmail.com
The function declaration for select_next_encryption_method use the
variable name have_valid_connection, so fix the prototype in the
header to match that.
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/3F577953-A29E-4722-98AD-2DA9EFF2CBB8@yesql.se
This updates the link from pg_createsubscriber to initial data sync
to actually link to the subsection in question as opposed to the
main logical replication section.
Author: Pavel Luzanov <p.luzanov@postgrespro.ru>
Discussion: https://postgr.es/m/a4af555a-ac60-4416-877d-0440d29b8763@postgrespro.ru
This fixes various typos, duplicated words, and tiny bits of whitespace
mainly in code comments but also in docs.
Author: Daniel Gustafsson <daniel@yesql.se>
Author: Heikki Linnakangas <hlinnaka@iki.fi>
Author: Alexander Lakhin <exclusion@gmail.com>
Author: David Rowley <dgrowleyml@gmail.com>
Author: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/3F577953-A29E-4722-98AD-2DA9EFF2CBB8@yesql.se
Preprocessing for nbtree index scans allowed array "input" scan keys
already marked eliminated during array-specific preprocessing to be
"fixed up" during preprocessing proper. This allowed eliminated scan
keys on DESC index columns to spurious have their strategy commuted,
causing assertion failures.
To fix, teach _bt_fix_scankey_strategy to ignore these scan keys. This
brings it in line with its only caller, _bt_preprocess_keys.
Oversight in commit 5bf748b8, which enhanced nbtree ScalarArrayOp
execution.
Reported-By: Donghang Lin <donghanglin@gmail.com>
Discussion: https://postgr.es/m/CAA=D8a2sHK6CAzZ=0CeafC-Y-MFXbYxnRSHvZTi=+JHu6kAa8Q@mail.gmail.com
Previously, they were recognized anywhere in an incremental backup
directory; now, we restrict this to places where they are expected to
appear. That means this code will need updating if we ever do
incremental backups of files in other places (e.g. SLRU files), but
it lets you create a file called INCREMENTAL.config (or something like
that) at the top level of the data directory and still have things
work.
Patch by me, per request from David Steele, who also reviewed.
Discussion: http://postgr.es/m/5a7817da-6349-4653-8056-470300b6e512@pgmasters.net
This part of my previous commit seems to have broken pg_upgrade on
crake, at least from 9.2. I'll see if there's a better fix, but in the
meantime this should suffice to keep the buildfarm green.
We don't want users to think that pg_combinebackup is trying to check
the validity of individual backups, because it isn't. Adjust the wording
about sanity checks to make it clear that verification of individual
backups is the job of pg_verifybackup, and that the checks performed
by pg_combinebackup are around the relationships between the backups.
Per discussion with David Steele.
Discussion: http://postgr.es/m/e6f930c3-590c-47b9-b094-217bb2a3e22e@pgmasters.net
In tables with primary keys, pg_dump creates tables with primary keys by
initially dumping them with throw-away not-null constraints (marked "no
inherit" so that they don't create problems elsewhere), to later drop
them once the primary key is restored. Because of a unrelated
consideration, on tables with children we add not-null constraints to
all columns of the primary key when it is created.
If both a table and its child have primary keys, and pg_dump happens to
emit the child table first (and its throw-away not-null) and later its
parent table, the creation of the parent's PK will fail because the
throw-away not-null constraint collides with the permanent not-null
constraint that the PK wants to add, so the dump fails to restore.
We can work around this problem by letting the primary key "take over"
the child's not-null. This requires no changes to pg_dump, just two
changes to ALTER TABLE: first, the ability to convert a no-inherit
not-null constraint into a regular inheritable one (including recursing
down to children, if there are any); second, the ability to "drop" a
constraint that is defined both directly in the table and inherited from
a parent (which simply means to mark it as no longer having a local
definition).
Secondarily, change ATPrepAddPrimaryKey() to acquire locks all the way
down the inheritance hierarchy, in case we need to recurse when
propagating constraints.
These two changes allow pg_dump to reproduce more cases involving
inheritance from versions 16 and older.
Lastly, make two changes to pg_dump: 1) do not try to drop a not-null
constraint that's marked as inherited; this allows a dump to restore
with no errors if a table with a PK inherits from another which also has
a PK; 2) avoid giving inherited constraints throwaway names, for the
rare cases where such a constraint survives after the restore.
Reported-by: Andrew Bille <andrewbille@gmail.com>
Reported-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/CAJnzarwkfRu76_yi3dqVF_WL-MpvT54zMwAxFwJceXdHB76bOA@mail.gmail.com
Discussion: https://postgr.es/m/Zh0aAH7tbZb-9HbC@pryzbyj2023
c0fc075186 wasn't careful about naming the DOMAIN used in some new
tests in sqljson_queryfunc.sql so as not to clash with the name of a
DOMAIN used in the nearby sqljson_jsontable.sql. Fix by using a
different name for the newly added DOMAIN in sqljson_queryfuncs.sql.
Per buildfarm members canebrake and urutu.
Discussion: https://postgr.es/m/CA+HiwqEjkbDxqqD3VJamc6R9+B102H7=SFYYOM7gKrxzJO35TQ@mail.gmail.com
This addresses some post-commit review comments for commits 6185c973,
de3600452, and 9425c596a0, with the following changes:
* Fix JSON_TABLE() syntax documentation to use the term
"path_expression" for JSON path expressions instead of
"json_path_specification" to be consistent with the other SQL/JSON
functions.
* Fix a typo in the example code in JSON_TABLE() documentation.
* Rewrite some newly added comments in jsonpath.h.
* In JsonPathQuery(), add missing cast to int before printing an enum
value.
Reported-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxG_e0QLCgaELrr2ZNz7AxPeGCNKAORe3fHtFCQLsH4J4Q@mail.gmail.com
SQL/JSON query functions allow specifying an expression to return
when either of ON ERROR or ON EMPTY condition occurs when evaluating
the JSON path expression. The parser (transformJsonBehavior()) checks
that the specified expression is one of the supported expressions, but
there are two issues with how the check is done that are fixed in this
commit:
* No check for some expressions related to coercion, such as
CoerceViaIO, that may appear in the transformed user-specified
expressions that include cast(s)
* An unsupported expression may be masked by a coercion-related
expression, which must be flagged by checking the latter's
argument expression recursively
Author: Jian He <jian.universality@gmail.com>
Author: Amit Langote <amitlangote09@gmail.com>
Reported-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxEqhqsfrg_p7EMyo5zak3d767iFDL8vz_4%3DZBHpOtrghw@mail.gmail.com
Discussion: https://postgr.es/m/CACJufxGOerH1QJknm1noh-Kz5FqU4p7QfeZSeVT2tN_4SLXYNg@mail.gmail.com
This improves some error messages emitted by SQL/JSON query functions
by mentioning column name when available, such as when they are
invoked as part of evaluating JSON_TABLE() columns. To do so, a new
field column_name is added to both JsonFuncExpr and JsonExpr that is
only populated when creating those nodes for transformed JSON_TABLE()
columns.
While at it, relevant error messages are reworded for clarity.
Reported-by: Jian He <jian.universality@gmail.com>
Suggested-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxG_e0QLCgaELrr2ZNz7AxPeGCNKAORe3fHtFCQLsH4J4Q@mail.gmail.com
fefd9a3fed turned tail recursion of CommitTransactionCommand() and
AbortCurrentTransaction() into iteration. However, it splits the handling of
cases between different functions.
This commit puts the handling of all the cases into
AbortCurrentTransactionInternal() and CommitTransactionCommandInternal().
Now CommitTransactionCommand() and AbortCurrentTransaction() are just doing
the repeated calls of internal functions.
Reported-by: Andres Freund
Discussion: https://postgr.es/m/20240415224834.w6piwtefskoh32mv%40awork3.anarazel.de
Author: Andres Freund
GlobalVisTestNonRemovableHorizon() was only used for the implementation of
snapshot_too_old, which was removed in f691f5b80a. As using
GlobalVisTestNonRemovableHorizon() is not particularly efficient, no new uses
for it should be added. Therefore remove.
Discussion: https://postgr.es/m/20240415185720.q4dg4dlcyvvrabz4@awork3.anarazel.de
Commit b437571714 added support for parallel builds of BRIN indexes,
using code similar to BTREE. But there were to be a couple unnecessary
differences, particularly in how the leader waits for the workers, and
merges the results. So remove these, to make the code more similar.
The leader never waited on the workersdonecv condition variable, but
simply called WaitForParallelWorkersToFinish() in _brin_end_parallel()
and then merged the per-worker results. This worked correctly, but it
seems better to do the wait and merge before _brin_end_parallel().
This commit moves the relevant code to _brin_parallel_heapscan/merge(),
which means _brin_end_parallel() remains responsible only for exiting
the parallel mode and accumulating WAL usage data.
Discussion: https://postgr.es/m/3733d042-71e1-6ae6-5fac-00c12db62db6@enterprisedb.com
As explained in 4d916dd876, the test instability is caused by delayed
cleanup of deleted rows. This commit removes the DELETE, stabilizing the
test without accidentally disabling parallel builds.
The intent of the delete however was to produce empty ranges, and test
that the parallel index build populates those correctly. But there's
another way to create empty ranges - partial indexes, which does not
rely on cleanup of deleted rows.
Idea to use partial indexes by Matthias van de Meent, patch by me.
Discussion: https://postgr.es/m/95d9cd43-5a92-407c-b7e4-54cd303630fe%40enterprisedb.com
The configure check for HAVE_DECL_LLVMORCREGISTERPERF was removed by
e9a9843e13, but some code guarded by it was left. (That commit
removed the "register" calls but left the "unregister" calls.) That
code cannot be reached anymore, so remove it.
Reported-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://www.postgresql.org/message-id/5539b16c-cff7-46d5-9621-c3fb6b549e9e@iki.fi
The ON_ERROR option of the COPY command previously allowed omitting
its value, which was inconsistent with the syntax synopsis in the
documentation and the behavior of other non-boolean COPY options.
This change enforces providing a value for the ON_ERROR option,
ensuring consistency across other non-boolean options and aligning
with the documented syntax.
Author: Atsushi Torikoshi
Reviewed-by: Masahiko Sawada
Discussion: https://postgr.es/m/a9770bf57646d90dedc3d54cf32634b2%40oss.nttdata.com
BumpContext relies on using the head block from its 'blocks' field to
use as the current block to allocate new chunks to. When we receive an
allocation request larger than allocChunkLimit, we place these chunks on
a new dedicated block and, until now, we pushed the block onto the
*head* of the 'blocks' list.
This behavior caused the previous bump block to no longer be available
for new normal-sized (non-large) allocations and would result in blocks
only being partially filled if a large allocation request arrived before
the block became full.
Here adjust the code to push these dedicated blocks onto the *tail* of
the blocks list so that the head block remains intact and available to
be used by normal allocation request sizes until it becomes full.
In passing, make the elog(ERROR) calls for the unsupported callbacks
consistent. Likewise for the header comments for those functions.
Discussion: https://postgr.es/m/CAApHDvp9___r-ayJj0nZ6GD3MeCGwGZ0_6ZptWpwj+zqHtmwCw@mail.gmail.com
Discussion: https://postgr.es/m/CAApHDvqerXpzUnuDQfUEi3DZA+9=Ud9WSt3ruxN5b6PcOosx2g@mail.gmail.com
The code associated with EXEC SQL DEFINE was unreadable and full of
bugs, notably:
* It'd attempt to free a non-malloced string if the ecpg program
tries to redefine a macro that was defined on the command line.
* Possible memory stomp if user writes "-D=foo".
* Undef'ing or redefining a macro defined on the command line would
change the state visible to the next file, when multiple files are
specified on the command line. (While possibly that could have been
an intentional choice, the code clearly intends to revert to the
original macro state; it's just failing to consider this interaction.)
* Missing "break" in defining a new macro meant that redefinition
of an existing name would cause an extra entry to be added to the
definition list. While not immediately harmful, a subsequent undef
would result in the prior entry becoming visible again.
* The interactions with input buffering are subtle and were entirely
undocumented.
It's not that surprising that we hadn't noticed these bugs,
because there was no test coverage at all of either the -D
command line switch or multiple input files. This patch adds
such coverage (in a rather hacky way I guess).
In addition to the code bugs, the user documentation was confused
about whether the -D switch defines a C macro or an ecpg one, and
it failed to mention that you can write "-Dsymbol=value".
These problems are old, so back-patch to all supported branches.
Discussion: https://postgr.es/m/998011.1713217712@sss.pgh.pa.us
The test for parallel create of BRIN indexes added by commit 8225c2fd40
happens to be unstable - a background transaction (e.g. auto-analyze)
may hold back global xmin for the initial VACUUM / CREATE INDEX. If the
cleanup happens before the next CREATE INDEX, the indexes will not be
exactly the same.
This is the same issue as e2933a6e11, so fix it the same way by making
the table TEMPORARY, which uses an up-to-date cutoff xmin that is not
held back by other processes.
Reported by Alexander Lakhin, who also suggested the fix.
Author: Alexander Lakhin
Discussion: https://postgr.es/m/b58901cd-a7cc-29c6-e2b1-e3d7317c3c69@gmail.com
Discussion: https://postgr.es/m/2892135.1668976646@sss.pgh.pa.us
When building a join clause derived from an EquivalenceClass, if the
clause is to be used with an appendrel child relation then make sure
its clause_relids include the relids of that child relation.
Normally this would be true already because the EquivalenceMember
would be a Var of that relation. However, if the appendrel represents
a flattened UNION ALL construct then some child EquivalenceMembers
could be constants with no relids. The resulting under-marked clause
is problematic because it could mislead join_clause_is_movable_into
about where the clause should be evaluated. We do not have an example
showing incorrect plan generation, but there are existing cases in
the regression tests that will fail the Asserts this patch adds to
get_baserel_parampathinfo. A similarly wrong conclusion about a
clause being considered by get_joinrel_parampathinfo would lead to
wrong placement of the clause. (This also squares with the way
that clause_relids is calculated for non-equijoin clauses in
adjust_appendrel_attrs.)
The other reason for wanting these new Asserts is that the previous
blithe assumption that the results of generate_join_implied_equalities
"necessarily satisfy join_clause_is_movable_into" turns out to be
wrong pre-v16. If it's still wrong it'd be good to find out.
Per bug #18429 from Benoît Ryder. The bug as filed was fixed by
commit 2489d76c4, but these changes correlate with the fix we
will need to apply in pre-v16 branches.
Discussion: https://postgr.es/m/18429-8982d4a348cc86c6@postgresql.org
There were no callers of BumpAllocLarge() in the regression tests, so
here we add a sort with a tuple large enough to use that path in bump.c.
Also, BumpStats() wasn't being called, so add a test to sysviews.sql to
call pg_backend_memory_contexts() while a bump context exists in the
backend.
Reported-by: Andres Freund
Discussion: https://postgr.es/m/20240414223305.m3i5eju6zylabvln@awork3.anarazel.de
All backend-side variables should be marked with PGDLLIMPORT, as per
policy introduced in 8ec569479f. aafc05de1b has forgotten
MyClientSocket, and 05c3980e7f LoadedSSL.
These can be spotted with a command like this one (be careful of not
switching __pg_log_level):
src/tools/mark_pgdllimport.pl $(git ls-files src/include/)
Reported-by: Peter Eisentraut
Discussion: https://postgr.es/m/ZhzkRzrkKhbeQMRm@paquier.xyz
Previously, we had consecutive, very short chapters called "Generic
WAL" and "Custom WAL Resource Managers," explaining different approaches
to the same problem. Merge them into a single chapter. Explain most
of the differences between the approaches in the chapter's
introductory text, rather than in the individual sections.
Discussion: http://postgr.es/m/46ac50c1-6b2a-404f-a683-b67af6ab56e9@eisentraut.org
The documentation for SET ROLE states that superusers who switch to
a non-superuser role lose their superuser privileges. While this
is true for most commands, there are exceptions such as SET ROLE
and SET SESSION AUTHORIZATION, which continue to use the current
session user and the authenticated user, respectively.
Furthermore, the description of this command already describes its
effect, so it is arguably unnecessary to include this special case.
This commit removes the note about the superuser case and adds a
sentence about the aforementioned exceptions to the description.
Co-authored-by: Yurii Rashkovskii
Reviewed-by: Shubham Khanna, Robert Haas, Michael Paquier
Discussion: https://postgr.es/m/CA%2BRLCQysHtME0znk2KUMJN343ksboSRQSU-hCnOjesX6VK300Q%40mail.gmail.com
Commit 2ed8f9a01 intended to institute a policy that if a
RangeTblFunction has a coldeflist, then the function return type is
certainly RECORD, and we should use the coldeflist as the source of
truth about what the columns of the record type are. When the
original function has been folded to a constant, inspection of the
constant might give a different answer. This situation will lead to
a tuple-type-mismatch error at execution, but up until that point we
need to consistently believe the coldeflist, or we'll have problems
from different bits of code reaching different conclusions.
expandRTE didn't get that memo though, and would try to produce a
tupdesc based on the constant in this situation, leading to an
assertion failure. (Desultory testing suggests that non-assert
builds often manage to give the expected error, although I also
saw a "cache lookup failed for type 0" error, and it seems at
least possible that a crash could happen.)
Some other callers of get_expr_result_type and get_expr_result_tupdesc
were also being incautious about this. While none of them seem to
have actual bugs, they're working harder than necessary in this case,
besides which it seems safest to have an explicit policy of not using
those functions on an RTE with a coldeflist. Adjust the code
accordingly, and add commentary to funcapi.c about this policy.
Also fix an obsolete comment that claimed "get_expr_result_type()
doesn't know how to extract type info from a RECORD constant".
That hasn't been true since commit d57534740.
Per bug #18422 from Alexander Lakhin.
As with the previous commit, back-patch to all supported branches.
Discussion: https://postgr.es/m/18422-89ca86c8eac5246d@postgresql.org
When matching constraints in AttachPartitionEnsureIndexes() we weren't
testing the constraint type, which could make a UNIQUE key lacking a
not-null constraint incorrectly satisfy a primary key requirement. Fix
this by testing that the constraint types match. (Other possible
mismatches are verified by comparing index properties.)
Discussion: https://postgr.es/m/202402051447.wimb4xmtiiyb@alvherre.pgsql
In one of the many strange corner cases of multiple inheritance being
used, commit b0e96f3119 missed a CommandCounterIncrement() call after
updating the attnotnull flag during ALTER TABLE ADD COLUMN, which caused
a catalog tuple to be update attempted twice in the same command, giving
rise to a "tuple already updated by self" error. Add the missing call
to solve that, and a test case that reproduces the scenario.
As a (perhaps surprising) secondary effect, this CCI addition triggers
another behavior change: when a primary key is added to a parent
partitioned table and the column in an existing partition does not have
a not-null constraint, we no longer error out. This will probably be a
welcome change by some users, and I think it's unlikely that anybody
will miss the old behavior.
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: http://postgr.es/m/045dec3f-9b3d-aa44-0c99-85f6992306c7@gmail.com
\dD showed domain check constraints in arbitrary order, which can
cause regression test failures, which was exposed by commit
9895b35cb8. To fix, order the constraints by conname, which matches
what psql does in other queries listing constraints.
This addresses a few problems with commit e5da0fe3c2 ("Catalog domain
not-null constraints").
In CREATE DOMAIN, a NOT NULL constraint looks like
CREATE DOMAIN d1 AS int [ CONSTRAINT conname ] NOT NULL
(Before e5da0fe3c2, the constraint name was accepted but ignored.)
But in ALTER DOMAIN, a NOT NULL constraint looks like
ALTER DOMAIN d1 ADD [ CONSTRAINT conname ] NOT NULL VALUE
where VALUE is where for a table constraint the column name would be.
(This works as of e5da0fe3c2. Before e5da0fe3c2, this syntax
resulted in an internal error.)
But for domains, this latter syntax is confusing and needlessly
inconsistent between CREATE and ALTER. So this changes it to just
ALTER DOMAIN d1 ADD [ CONSTRAINT conname ] NOT NULL
(None of these syntaxes are per SQL standard; we are just living with
the bits of inconsistency that have built up over time.)
In passing, this also changes the psql \dD output to not show not-null
constraints in the column "Check", since it's already shown in the
column "Nullable". This has also been off since e5da0fe3c2.
Reviewed-by: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/9ec24d7b-633d-463a-84c6-7acff769c9e8%40eisentraut.org
Alvaro Herrera