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Tom Lane 18bac60ede Let regexp_replace() make use of REG_NOSUB when feasible. ... If the replacement string doesn't contain \1...\9, then we don't need sub-match locations, so we can use the REG_NOSUB optimization here too. There's already a pre-scan of the replacement string to look for backslashes, so extend that to check for digits, and refactor to allow that to happen before we compile the regexp. While at it, try to speed up the pre-scan by using memchr() instead of a handwritten loop. It's likely that this is lost in the noise compared to the regexp processing proper, but maybe not. In any case, this coding is shorter. Also, add some test cases to improve the poor coverage of appendStringInfoRegexpSubstr(). Discussion: https://postgr.es/m/3534632.1628536485@sss.pgh.pa.us		5 years ago
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access	Remove unused function declaration	5 years ago
bootstrap	process startup: Remove bootstrap / checker modes from AuxProcType.	5 years ago
catalog	Add assorted new regexp_xxx SQL functions.	5 years ago
commands	Add support for SET ACCESS METHOD in ALTER TABLE	5 years ago
common	Adjust locations which have an incorrect copyright year	5 years ago
datatype	Update copyright for 2021	5 years ago
executor	Change the name of the Result Cache node to Memoize	5 years ago
fe_utils	Unify parsing logic for command-line integer options	5 years ago
foreign	Initial pgindent and pgperltidy run for v14.	5 years ago
jit	Update copyright for 2021	5 years ago
lib	Initial pgindent and pgperltidy run for v14.	5 years ago
libpq	Refactor SASL code with a generic interface for its mechanisms	5 years ago
mb	Fix incautious handling of possibly-miscoded strings in client code.	5 years ago
nodes	Change NestPath node to contain JoinPath node	5 years ago
optimizer	Change the name of the Result Cache node to Memoize	5 years ago
parser	Cleanup some aggregate code in the executor	5 years ago
partitioning	Allow ordered partition scans in more cases	5 years ago
port	Get rid of artificial restriction on hash table sizes on Windows.	5 years ago
portability	Fix another portability bug in recent pgbench commit.	5 years ago
postmaster	process startup: Move AuxiliaryProcessMain into its own file.	5 years ago
regex	Avoid determining regexp subexpression matches, when possible.	5 years ago
replication	Add prepare API support for streaming transactions in logical replication.	5 years ago
rewrite	Adjust locations which have an incorrect copyright year	5 years ago
snowball	Update snowball	5 years ago
statistics	Extended statistics on expressions	5 years ago
storage	Move temporary file cleanup to before_shmem_exit().	5 years ago
tcop	Centralize the logic for protective copying of utility statements.	5 years ago
tsearch	Don't leak compiled regex(es) when an ispell cache entry is dropped.	5 years ago
utils	Let regexp_replace() make use of REG_NOSUB when feasible.	5 years ago
.gitignore	Refactor dlopen() support	7 years ago
Makefile	Build in some knowledge about foreign-key relationships in the catalogs.	5 years ago
c.h	Work around issues in MinGW-64's setjmp/longjmp support.	5 years ago
fmgr.h	Update copyright for 2021	5 years ago
funcapi.h	Reconsider the handling of procedure OUT parameters.	5 years ago
getaddrinfo.h	Update copyright for 2021	5 years ago
getopt_long.h	Update copyright for 2021	5 years ago
miscadmin.h	process startup: Remove bootstrap / checker modes from AuxProcType.	5 years ago
pg_config.h.in	Portability fixes for sigwait.	5 years ago
pg_config_ext.h.in	…
pg_config_manual.h	Rename debug_invalidate_system_caches_always to debug_discard_caches.	5 years ago
pg_getopt.h	Update copyright for 2021	5 years ago
pg_trace.h	Update copyright for 2021	5 years ago
pgstat.h	pgstat: split reporting/fetching of bgwriter and checkpointer stats.	5 years ago
pgtar.h	Update copyright for 2021	5 years ago
pgtime.h	Update copyright for 2021	5 years ago
port.h	Move bsearch_arg to src/port	5 years ago
postgres.h	Mostly-cosmetic adjustments of TOAST-related macros.	5 years ago
postgres_ext.h	Phase 2 of pgindent updates.	9 years ago
postgres_fe.h	Update copyright for 2021	5 years ago
rusagestub.h	Update copyright for 2021	5 years ago
windowapi.h	Update copyright for 2021	5 years ago