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2025-03-26Use PG_MODULE_MAGIC_EXT in our installable shared libraries.Tom Lane
It seems potentially useful to label our shared libraries with version information, now that a facility exists for retrieving that. This patch labels them with the PG_VERSION string. There was some discussion about using semantic versioning conventions, but that doesn't seem terribly helpful for modules with no SQL-level presence; and for those that do have SQL objects, we typically expect them to support multiple revisions of the SQL definitions, so it'd still not be very helpful. I did not label any of src/test/modules/. It seems unnecessary since we don't install those, and besides there ought to be someplace that still provides test coverage for the original PG_MODULE_MAGIC macro. Author: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/dd4d1b59-d0fe-49d5-b28f-1e463b68fa32@gmail.com
2025-01-01Update copyright for 2025Bruce Momjian
Backpatch-through: 13
2024-10-28Remove unused #include's from contrib, pl, test .c filesPeter Eisentraut
as determined by IWYU Similar to commit dbbca2cf299, but for contrib, pl, and src/test/. Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org> Discussion: https://www.postgresql.org/message-id/flat/0df1d5b1-8ca8-4f84-93be-121081bde049%40eisentraut.org
2024-09-09Don't bother checking the result of SPI_connect[_ext] anymore.Tom Lane
SPI_connect/SPI_connect_ext have not returned any value other than SPI_OK_CONNECT since commit 1833f1a1c in v10; any errors are thrown via ereport. (The most likely failure is out-of-memory, which has always been thrown that way, so callers had better be prepared for such errors.) This makes it somewhat pointless to check these functions' result, and some callers within our code haven't been bothering; indeed, the only usage example within spi.sgml doesn't bother. So it's likely that the omission has propagated into extensions too. Hence, let's standardize on not checking, and document the return value as historical, while not actually changing these functions' behavior. (The original proposal was to change their return type to "void", but that would needlessly break extensions that are conforming to the old practice.) This saves a small amount of boilerplate code in a lot of places. Stepan Neretin Discussion: https://postgr.es/m/CAMaYL5Z9Uk8cD9qGz9QaZ2UBJFOu7jFx5Mwbznz-1tBbPDQZow@mail.gmail.com
2024-03-09Make contrib/tablefunc crosstab() also check typmodJoe Conway
contrib/tablefunc connectby() checks both type OID and typmod for its output columns while crosstab() only checks type OID. Fix that by makeing the crosstab() check look more like the connectby() check. Reported-by: Tom Lane Reviewed-by: Tom Lane Discussion: https://postgr.es/m/flat/18937.1709676295%40sss.pgh.pa.us
2024-03-09Improve wrong-tuple-type error reports in contrib/tablefunc.Tom Lane
These messages were fairly confusing, and didn't match the column names used in the SGML docs. Try to improve that. Also use error codes more specific than ERRCODE_SYNTAX_ERROR. Patch by me, reviewed by Joe Conway Discussion: https://postgr.es/m/18937.1709676295@sss.pgh.pa.us
2024-01-04Update copyright for 2024Bruce Momjian
Reported-by: Michael Paquier Discussion: https://postgr.es/m/ZZKTDPxBBMt3C0J9@paquier.xyz Backpatch-through: 12
2023-01-02Update copyright for 2023Bruce Momjian
Backpatch-through: 11
2022-12-20Add copyright notices to meson filesAndrew Dunstan
Discussion: https://postgr.es/m/222b43a5-2fb3-2c1b-9cd0-375d376c8246@dunslane.net
2022-10-05meson: Add windows resource filesAndres Freund
The generated resource files aren't exactly the same ones as the old buildsystems generate. Previously "InternalName" and "OriginalFileName" were mostly wrong / not set (despite being required), but that was hard to fix in at least the make build. Additionally, the meson build falls back to a "auto-generated" description when not set, and doesn't set it in a few cases - unlikely that anybody looks at these descriptions in detail. Author: Andres Freund <andres@anarazel.de> Author: Nazir Bilal Yavuz <byavuz81@gmail.com> Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
2022-09-22Harmonize parameter names in contrib code.Peter Geoghegan
Make sure that function declarations use names that exactly match the corresponding names from function definitions in contrib code. Like other recent commits that cleaned up function parameter names, this commit was written with help from clang-tidy. Author: Peter Geoghegan <pg@bowt.ie> Discussion: https://postgr.es/m/CAH2-WznJt9CMM9KJTMjJh_zbL5hD9oX44qdJ4aqZtjFi-zA3Tg@mail.gmail.com
2022-09-22meson: Add initial version of meson based build systemAndres Freund
Autoconf is showing its age, fewer and fewer contributors know how to wrangle it. Recursive make has a lot of hard to resolve dependency issues and slow incremental rebuilds. Our home-grown MSVC build system is hard to maintain for developers not using Windows and runs tests serially. While these and other issues could individually be addressed with incremental improvements, together they seem best addressed by moving to a more modern build system. After evaluating different build system choices, we chose to use meson, to a good degree based on the adoption by other open source projects. We decided that it's more realistic to commit a relatively early version of the new build system and mature it in tree. This commit adds an initial version of a meson based build system. It supports building postgres on at least AIX, FreeBSD, Linux, macOS, NetBSD, OpenBSD, Solaris and Windows (however only gcc is supported on aix, solaris). For Windows/MSVC postgres can now be built with ninja (faster, particularly for incremental builds) and msbuild (supporting the visual studio GUI, but building slower). Several aspects (e.g. Windows rc file generation, PGXS compatibility, LLVM bitcode generation, documentation adjustments) are done in subsequent commits requiring further review. Other aspects (e.g. not installing test-only extensions) are not yet addressed. When building on Windows with msbuild, builds are slower when using a visual studio version older than 2019, because those versions do not support MultiToolTask, required by meson for intra-target parallelism. The plan is to remove the MSVC specific build system in src/tools/msvc soon after reaching feature parity. However, we're not planning to remove the autoconf/make build system in the near future. Likely we're going to keep at least the parts required for PGXS to keep working around until all supported versions build with meson. Some initial help for postgres developers is at https://wiki.postgresql.org/wiki/Meson With contributions from Thomas Munro, John Naylor, Stone Tickle and others. Author: Andres Freund <andres@anarazel.de> Author: Nazir Bilal Yavuz <byavuz81@gmail.com> Author: Peter Eisentraut <peter@eisentraut.org> Reviewed-By: Peter Eisentraut <peter.eisentraut@enterprisedb.com> Discussion: https://postgr.es/m/20211012083721.hvixq4pnh2pixr3j@alap3.anarazel.de
2022-02-17Remove all traces of tuplestore_donestoring() in the C codeMichael Paquier
This routine is a no-op since dd04e95 from 2003, with a macro kept around for compatibility purposes. This has led to the same code patterns being copy-pasted around for no effect, sometimes in confusing ways like in pg_logical_slot_get_changes_guts() from logical.c where the code was actually incorrect. This issue has been discussed on two different threads recently, so rather than living with this legacy, remove any uses of this routine in the C code to simplify things. The compatibility macro is kept to avoid breaking any out-of-core modules that depend on it. Reported-by: Tatsuhito Kasahara, Justin Pryzby Author: Tatsuhito Kasahara Discussion: https://postgr.es/m/20211217200419.GQ17618@telsasoft.com Discussion: https://postgr.es/m/CAP0=ZVJeeYfAeRfmzqAF2Lumdiv4S4FewyBnZd4DPTrsSQKJKw@mail.gmail.com
2022-01-08Update copyright for 2022Bruce Momjian
Backpatch-through: 10
2021-11-29Replace random(), pg_erand48(), etc with a better PRNG API and algorithm.Tom Lane
Standardize on xoroshiro128** as our basic PRNG algorithm, eliminating a bunch of platform dependencies as well as fundamentally-obsolete PRNG code. In addition, this API replacement will ease replacing the algorithm again in future, should that become necessary. xoroshiro128** is a few percent slower than the drand48 family, but it can produce full-width 64-bit random values not only 48-bit, and it should be much more trustworthy. It's likely to be noticeably faster than the platform's random(), depending on which platform you are thinking about; and we can have non-global state vectors easily, unlike with random(). It is not cryptographically strong, but neither are the functions it replaces. Fabien Coelho, reviewed by Dean Rasheed, Aleksander Alekseev, and myself Discussion: https://postgr.es/m/alpine.DEB.2.22.394.2105241211230.165418@pseudo
2021-09-27Fix typos and grammar in code commentsMichael Paquier
Several mistakes have piled in the code comments over the time, including incorrect grammar, function names and simple typos. This commit takes care of a portion of these. No backpatch is done as this is only cosmetic. Author: Justin Pryzby Discussion: https://postgr.es/m/20210924215827.GS831@telsasoft.com
2021-01-02Update copyright for 2021Bruce Momjian
Backpatch-through: 9.5
2020-12-15Improve hash_create()'s API for some added robustness.Tom Lane
Invent a new flag bit HASH_STRINGS to specify C-string hashing, which was formerly the default; and add assertions insisting that exactly one of the bits HASH_STRINGS, HASH_BLOBS, and HASH_FUNCTION be set. This is in hopes of preventing recurrences of the type of oversight fixed in commit a1b8aa1e4 (i.e., mistakenly omitting HASH_BLOBS). Also, when HASH_STRINGS is specified, insist that the keysize be more than 8 bytes. This is a heuristic, but it should catch accidental use of HASH_STRINGS for integer or pointer keys. (Nearly all existing use-cases set the keysize to NAMEDATALEN or more, so there's little reason to think this restriction should be problematic.) Tweak hash_create() to insist that the HASH_ELEM flag be set, and remove the defaults it had for keysize and entrysize. Since those defaults were undocumented and basically useless, no callers omitted HASH_ELEM anyway. Also, remove memset's zeroing the HASHCTL parameter struct from those callers that had one. This has never been really necessary, and while it wasn't a bad coding convention it was confusing that some callers did it and some did not. We might as well save a few cycles by standardizing on "not". Also improve the documentation for hash_create(). In passing, improve reinit.c's usage of a hash table by storing the key as a binary Oid rather than a string; and, since that's a temporary hash table, allocate it in CurrentMemoryContext for neatness. Discussion: https://postgr.es/m/590625.1607878171@sss.pgh.pa.us
2020-11-25tablefunc: Reject negative number of tuples passed to normal_rand()Peter Eisentraut
The function converted the first argument i.e. the number of tuples to return into an unsigned integer which turns out to be huge number when a negative value is passed. This causes the function to take much longer time to execute. Instead, reject a negative value. (If someone really wants to generate many more result rows, they should consider adding a bigint or numeric variant.) While at it, improve SQL test to test the number of tuples returned by this function. Author: Ashutosh Bapat <ashutosh.bapat@2ndquadrant.com> Discussion: https://www.postgresql.org/message-id/CAG-ACPW3PUUmSnM6cLa9Rw4BEC5cEMKjX8Gogc8gvQcT3cYA1A@mail.gmail.com
2020-09-06Remove unused parameterPeter Eisentraut
unused since 84d723b6cefcf25b8c800f8aa6cf3c9538a546b4 Discussion: https://www.postgresql.org/message-id/flat/511bb100-f829-ba21-2f10-9f952ec06ead%402ndquadrant.com
2020-02-19Remove support for upgrading extensions from "unpackaged" state.Tom Lane
Andres Freund pointed out that allowing non-superusers to run "CREATE EXTENSION ... FROM unpackaged" has security risks, since the unpackaged-to-1.0 scripts don't try to verify that the existing objects they're modifying are what they expect. Just attaching such objects to an extension doesn't seem too dangerous, but some of them do more than that. We could have resolved this, perhaps, by still requiring superuser privilege to use the FROM option. However, it's fair to ask just what we're accomplishing by continuing to lug the unpackaged-to-1.0 scripts forward. None of them have received any real testing since 9.1 days, so they may not even work anymore (even assuming that one could still load the previous "loose" object definitions into a v13 database). And an installation that's trying to go from pre-9.1 to v13 or later in one jump is going to have worse compatibility problems than whether there's a trivial way to convert their contrib modules into extension style. Hence, let's just drop both those scripts and the core-code support for "CREATE EXTENSION ... FROM". Discussion: https://postgr.es/m/20200213233015.r6rnubcvl4egdh5r@alap3.anarazel.de
2020-02-13Mark some contrib modules as "trusted".Tom Lane
This allows these modules to be installed into a database without superuser privileges (assuming that the DBA or sysadmin has installed the module's files in the expected place). You only need CREATE privilege on the current database, which by default would be available to the database owner. The following modules are marked trusted: btree_gin btree_gist citext cube dict_int earthdistance fuzzystrmatch hstore hstore_plperl intarray isn jsonb_plperl lo ltree pg_trgm pgcrypto seg tablefunc tcn tsm_system_rows tsm_system_time unaccent uuid-ossp In the future we might mark some more modules trusted, but there seems to be no debate about these, and on the whole it seems wise to be conservative with use of this feature to start out with. Discussion: https://postgr.es/m/32315.1580326876@sss.pgh.pa.us
2020-01-01Update copyrights for 2020Bruce Momjian
Backpatch-through: update all files in master, backpatch legal files through 9.4
2019-12-24Avoid splitting C string literals with \-newlineAlvaro Herrera
Using \ is unnecessary and ugly, so remove that. While at it, stitch the literals back into a single line: we've long discouraged splitting error message literals even when they go past the 80 chars line limit, to improve greppability. Leave contrib/tablefunc alone. Discussion: https://postgr.es/m/20191223195156.GA12271@alvherre.pgsql
2019-12-23Disallow null category in crosstab_hashJoe Conway
While building a hash map of categories in load_categories_hash, resulting category names have not thus far been checked to ensure they are not null. Prior to pg12 null category names worked to the extent that they did not crash on some platforms. This is because those system libraries have an snprintf which can deal with being passed a null pointer argument for a string. But even in those cases null categories did nothing useful. And on some platforms it crashed. As of pg12, our own version of snprintf gets called, and it does not deal with null pointer arguments at all, and crashes consistently. Fix that by disallowing null categories. They never worked usefully, and no one has ever asked for them to work previously. Back-patch to all supported branches. Reported-By: Ireneusz Pluta Discussion: https://postgr.es/m/16176-7489719b05e4303c@postgresql.org
2019-10-24Make the order of the header file includes consistent in contrib modules.Amit Kapila
The basic rule we follow here is to always first include 'postgres.h' or 'postgres_fe.h' whichever is applicable, then system header includes and then Postgres header includes.  In this, we also follow that all the Postgres header includes are in order based on their ASCII value.  We generally follow these rules, but the code has deviated in many places. This commit makes it consistent just for contrib modules. The later commits will enforce similar rules in other parts of code. Author: Vignesh C Reviewed-by: Amit Kapila Discussion: https://postgr.es/m/CALDaNm2Sznv8RR6Ex-iJO6xAdsxgWhCoETkaYX=+9DW3q0QCfA@mail.gmail.com
2019-05-22Phase 2 pgindent run for v12.Tom Lane
Switch to 2.1 version of pg_bsd_indent. This formats multiline function declarations "correctly", that is with additional lines of parameter declarations indented to match where the first line's left parenthesis is. Discussion: https://postgr.es/m/CAEepm=0P3FeTXRcU5B2W3jv3PgRVZ-kGUXLGfd42FFhUROO3ug@mail.gmail.com
2019-03-27Switch some palloc/memset calls to palloc0Michael Paquier
Some code paths have been doing some allocations followed by an immediate memset() to initialize the allocated area with zeros, this is a bit overkill as there are already interfaces to do both things in one call. Author: Daniel Gustafsson Reviewed-by: Michael Paquier Discussion: https://postgr.es/m/vN0OodBPkKs7g2Z1uyk3CUEmhdtspHgYCImhlmSxv1Xn6nY1ZnaaGHL8EWUIQ-NEv36tyc4G5-uA3UXUF2l4sFXtK_EQgLN1hcgunlFVKhA=@yesql.se
2019-01-02Update copyright for 2019Bruce Momjian
Backpatch-through: certain files through 9.4
2018-01-03Update copyright for 2018Bruce Momjian
Backpatch-through: certain files through 9.3
2017-08-20Change tupledesc->attrs[n] to TupleDescAttr(tupledesc, n).Andres Freund
This is a mechanical change in preparation for a later commit that will change the layout of TupleDesc. Introducing a macro to abstract the details of where attributes are stored will allow us to change that in separate step and revise it in future. Author: Thomas Munro, editorialized by Andres Freund Reviewed-By: Andres Freund Discussion: https://postgr.es/m/CAEepm=0ZtQ-SpsgCyzzYpsXS6e=kZWqk3g5Ygn3MDV7A8dabUA@mail.gmail.com
2017-06-21Phase 3 of pgindent updates.Tom Lane
Don't move parenthesized lines to the left, even if that means they flow past the right margin. By default, BSD indent lines up statement continuation lines that are within parentheses so that they start just to the right of the preceding left parenthesis. However, traditionally, if that resulted in the continuation line extending to the right of the desired right margin, then indent would push it left just far enough to not overrun the margin, if it could do so without making the continuation line start to the left of the current statement indent. That makes for a weird mix of indentations unless one has been completely rigid about never violating the 80-column limit. This behavior has been pretty universally panned by Postgres developers. Hence, disable it with indent's new -lpl switch, so that parenthesized lines are always lined up with the preceding left paren. This patch is much less interesting than the first round of indent changes, but also bulkier, so I thought it best to separate the effects. Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
2017-06-21Phase 2 of pgindent updates.Tom Lane
Change pg_bsd_indent to follow upstream rules for placement of comments to the right of code, and remove pgindent hack that caused comments following #endif to not obey the general rule. Commit e3860ffa4dd0dad0dd9eea4be9cc1412373a8c89 wasn't actually using the published version of pg_bsd_indent, but a hacked-up version that tried to minimize the amount of movement of comments to the right of code. The situation of interest is where such a comment has to be moved to the right of its default placement at column 33 because there's code there. BSD indent has always moved right in units of tab stops in such cases --- but in the previous incarnation, indent was working in 8-space tab stops, while now it knows we use 4-space tabs. So the net result is that in about half the cases, such comments are placed one tab stop left of before. This is better all around: it leaves more room on the line for comment text, and it means that in such cases the comment uniformly starts at the next 4-space tab stop after the code, rather than sometimes one and sometimes two tabs after. Also, ensure that comments following #endif are indented the same as comments following other preprocessor commands such as #else. That inconsistency turns out to have been self-inflicted damage from a poorly-thought-through post-indent "fixup" in pgindent. This patch is much less interesting than the first round of indent changes, but also bulkier, so I thought it best to separate the effects. Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
2017-01-03Update copyright via script for 2017Bruce Momjian
2016-09-30Remove unnecessary prototypesPeter Eisentraut
Prototypes for functions implementing V1-callable functions are no longer necessary. Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi> Reviewed-by: Thomas Munro <thomas.munro@enterprisedb.com>
2016-03-12Widen query numbers-of-tuples-processed counters to uint64.Tom Lane
This patch widens SPI_processed, EState's es_processed field, PortalData's portalPos field, FuncCallContext's call_cntr and max_calls fields, ExecutorRun's count argument, PortalRunFetch's result, and the max number of rows in a SPITupleTable to uint64, and deals with (I hope) all the ensuing fallout. Some of these values were declared uint32 before, and others "long". I also removed PortalData's posOverflow field, since that logic seems pretty useless given that portalPos is now always 64 bits. The user-visible results are that command tags for SELECT etc will correctly report tuple counts larger than 4G, as will plpgsql's GET GET DIAGNOSTICS ... ROW_COUNT command. Queries processing more tuples than that are still not exactly the norm, but they're becoming more common. Most values associated with FETCH/MOVE distances, such as PortalRun's count argument and the count argument of most SPI functions that have one, remain declared as "long". It's not clear whether it would be worth promoting those to int64; but it would definitely be a large dollop of additional API churn on top of this, and it would only help 32-bit platforms which seem relatively less likely to see any benefit. Andreas Scherbaum, reviewed by Christian Ullrich, additional hacking by me
2016-01-02Update copyright for 2016Bruce Momjian
Backpatch certain files through 9.1
2015-08-03Fix a number of places that produced XX000 errors in the regression tests.Tom Lane
It's against project policy to use elog() for user-facing errors, or to omit an errcode() selection for errors that aren't supposed to be "can't happen" cases. Fix all the violations of this policy that result in ERRCODE_INTERNAL_ERROR log entries during the standard regression tests, as errors that can reliably be triggered from SQL surely should be considered user-facing. I also looked through all the files touched by this commit and fixed other nearby problems of the same ilk. I do not claim to have fixed all violations of the policy, just the ones in these files. In a few places I also changed existing ERRCODE choices that didn't seem particularly appropriate; mainly replacing ERRCODE_SYNTAX_ERROR by something more specific. Back-patch to 9.5, but no further; changing ERRCODE assignments in stable branches doesn't seem like a good idea.
2015-01-30Handle unexpected query results, especially NULLs, safely in connectby().Tom Lane
connectby() didn't adequately check that the constructed SQL query returns what it's expected to; in fact, since commit 08c33c426bfebb32 it wasn't checking that at all. This could result in a null-pointer-dereference crash if the constructed query returns only one column instead of the expected two. Less excitingly, it could also result in surprising data conversion failures if the constructed query returned values that were not I/O-conversion-compatible with the types specified by the query calling connectby(). In all branches, insist that the query return at least two columns; this seems like a minimal sanity check that can't break any reasonable use-cases. In HEAD, insist that the constructed query return the types specified by the outer query, including checking for typmod incompatibility, which the code never did even before it got broken. This is to hide the fact that the implementation does a conversion to text and back; someday we might want to improve that. In back branches, leave that alone, since adding a type check in a minor release is more likely to break things than make people happy. Type inconsistencies will continue to work so long as the actual type and declared type are I/O representation compatible, and otherwise will fail the same way they used to. Also, in all branches, be on guard for NULL results from the constructed query, which formerly would cause null-pointer dereference crashes. We now print the row with the NULL but don't recurse down from it. In passing, get rid of the rather pointless idea that build_tuplestore_recursively() should return the same tuplestore that's passed to it. Michael Paquier, adjusted somewhat by me
2015-01-06Update copyright for 2015Bruce Momjian
Backpatch certain files through 9.0
2014-08-25Fix typos in some error messages thrown by extension scripts when fed to psql.Andres Freund
Some of the many error messages introduced in 458857cc missed 'FROM unpackaged'. Also e016b724 and 45ffeb7e forgot to quote extension version numbers. Backpatch to 9.1, just like 458857cc which introduced the messages. Do so because the error messages thrown when the wrong command is copy & pasted aren't easy to understand.
2014-07-14Add file version information to most installed Windows binaries.Noah Misch
Prominent binaries already had this metadata. A handful of minor binaries, such as pg_regress.exe, still lack it; efforts to eliminate such exceptions are welcome. Michael Paquier, reviewed by MauMau.
2014-01-07Update copyright for 2014Bruce Momjian
Update all files in head, and files COPYRIGHT and legal.sgml in all back branches.
2013-10-31Use appendStringInfoString instead of appendStringInfo where possible.Robert Haas
This shaves a few cycles, and generally seems like good programming practice. David Rowley
2013-01-01Update copyrights for 2013Bruce Momjian
Fully update git head, and update back branches in ./COPYRIGHT and legal.sgml files.
2012-08-30Split tuple struct defs from htup.h to htup_details.hAlvaro Herrera
This reduces unnecessary exposure of other headers through htup.h, which is very widely included by many files. I have chosen to move the function prototypes to the new file as well, because that means htup.h no longer needs to include tupdesc.h. In itself this doesn't have much effect in indirect inclusion of tupdesc.h throughout the tree, because it's also required by execnodes.h; but it's something to explore in the future, and it seemed best to do the htup.h change now while I'm busy with it.
2012-08-29Fix assorted compilation failures in contribAlvaro Herrera
Evidently I failed to test a compile after my earlier header shuffling.
2012-07-05Reduce messages about implicit indexes and sequences to DEBUG1.Robert Haas
Per recent discussion on pgsql-hackers, these messages are too chatty for most users.
2012-01-01Update copyright notices for year 2012.Bruce Momjian
2011-10-12Throw a useful error message if an extension script file is fed to psql.Tom Lane
We have seen one too many reports of people trying to use 9.1 extension files in the old-fashioned way of sourcing them in psql. Not only does that usually not work (due to failure to substitute for MODULE_PATHNAME and/or @extschema@), but if it did work they'd get a collection of loose objects not an extension. To prevent this, insert an \echo ... \quit line that prints a suitable error message into each extension script file, and teach commands/extension.c to ignore lines starting with \echo. That should not only prevent any adverse consequences of loading a script file the wrong way, but make it crystal clear to users that they need to do it differently now. Tom Lane, following an idea of Andrew Dunstan's. Back-patch into 9.1 ... there is not going to be much value in this if we wait till 9.2.
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