postgresql/src/backend/utils
David Rowley 67f3a697ba Fix overly strict Assert in jsonpath code
This was failing for queries which try to get the .type() of a
jpiLikeRegex.  For example:

select jsonb_path_query('["string", "string"]',
                        '($[0] like_regex ".{7}").type()');

Reported-by: Alexander Kozhemyakin
Bug: #18035
Discussion: https://postgr.es/m/18035-64af5cdcb5adf2a9@postgresql.org
Backpatch-through: 12, where SQL/JSON path was added.
2023-08-02 01:40:56 +12:00
..
activity Fix assertion failure when updating stats_fetch_consistency in a transaction 2023-05-10 11:24:40 +09:00
adt Fix overly strict Assert in jsonpath code 2023-08-02 01:40:56 +12:00
cache Guard against null plan pointer in CachedPlanIsSimplyValid(). 2023-07-20 14:23:46 -04:00
error Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
fmgr Rename SetSingleFuncCall() to InitMaterializedSRF() 2022-10-18 10:22:40 +09:00
hash Update copyright for 2022 2022-01-07 19:04:57 -05:00
init Handle DROP DATABASE getting interrupted 2023-07-13 13:04:45 -07:00
mb Update copyright for 2022 2022-01-07 19:04:57 -05:00
misc Fix MarkGUCPrefixReserved() to check all options. 2023-07-06 13:05:25 +03:00
mmgr Re-bin segment when memory pages are freed. 2023-07-04 15:24:42 +12:00
resowner Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
sort Fix rare sharedtuplestore.c corruption. 2023-01-26 14:53:37 +13:00
time Fix incorrect logic in HaveRegisteredOrActiveSnapshot(). 2022-04-16 16:04:50 -04:00
.gitignore Rearrange makefile rules for running Gen_fmgrtab.pl. 2018-05-03 17:54:18 -04:00
errcodes.txt Add another SQL/JSON error code 2022-07-18 14:27:53 +02:00
Gen_dummy_probes.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_dummy_probes.pl.prolog Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_dummy_probes.sed Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_fmgrtab.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
generate-errcodes.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
Makefile Correct Makefile dependencies for catalog scripts 2022-02-14 09:07:09 +07:00
probes.d Update copyright for 2022 2022-01-07 19:04:57 -05:00
README.Gen_dummy_probes Tweak generation of Gen_dummy_probes.pl 2021-05-11 20:02:02 -04:00

# Generating dummy probes

If Postgres isn't configured with dtrace enabled, we need to generate
dummy probes for the entries in probes.d, that do nothing.

This is accomplished in Unix via the sed script `Gen_dummy_probes.sed`. We
used to use this in MSVC builds using the perl utility `psed`, which mimicked
sed. However, that utility disappeared from Windows perl distributions and so
we converted the sed script to a perl script to be used in MSVC builds.

We still keep the sed script as the authoritative source for generating
these dummy probes because except on Windows perl is not a hard requirement
when building from a tarball.

So, if you need to change the way dummy probes are generated, first change
the sed script, and when it's working generate the perl script. This can
be accomplished by using the perl utility s2p.

s2p is no longer part of the perl core, so it might not be on your system,
but it is available on CPAN and also in many package systems. e.g.
on Fedora it can be installed using `cpan App::s2p` or
`dnf install perl-App-s2p`.

The Makefile contains a recipe for regenerating Gen_dummy_probes.pl, so all
you need to do is once you have s2p installed is `make Gen_dummy_probes.pl`
Note that in a VPATH build this will generate the file in the vpath tree,
not the source tree.