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2432b1a040
postgresql/src/include
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Tom Lane 2432b1a040 Avoid spamming the client with multiple ParameterStatus messages. 
Up to now, we sent a ParameterStatus message to the client immediately
upon any change in the active value of any GUC_REPORT variable.  This
was only barely okay when the feature was designed; now that we have
things like function SET clauses, there are very plausible use-cases
where a GUC_REPORT variable might change many times within a query
--- and even end up back at its original value, perhaps.  Fortunately
most of our GUC_REPORT variables are unlikely to be changed often;
but there are proposals in play to enlarge that set, or even make it
user-configurable.

Hence, let's fix things to not generate more than one ParameterStatus
message per variable per query, and to not send any message at all
unless the end-of-query value is different from what we last reported.

Discussion: https://postgr.es/m/5708.1601145259@sss.pgh.pa.us
2020-11-25 11:40:44 -05:00
..
access Remove catalog function currtid() 2020-11-25 12:18:26 +09:00
bootstrap Update copyrights for 2020 2020-01-01 12:21:45 -05:00
catalog Remove catalog function currtid() 2020-11-25 12:18:26 +09:00
commands Fix a few comments that referred to copy.c. 2020-11-23 11:36:13 +02:00
common Improve performance of Unicode {de,re}composition in the backend 2020-10-23 11:05:46 +09:00
datatype Update copyrights for 2020 2020-01-01 12:21:45 -05:00
executor Move per-agg and per-trans duplicate finding to the planner. 2020-11-24 10:45:00 +02:00
fe_utils Move connect.h from fe_utils to src/include/common. 2020-08-10 09:22:54 -07:00
foreign Update copyrights for 2020 2020-01-01 12:21:45 -05:00
jit llvmjit: Work around bug in LLVM 3.9 causing crashes after 72559438f9. 2020-10-15 18:17:00 -07:00
lib Correct comment in simplehash.h. 2020-08-03 12:23:05 +12:00
libpq Add support for abstract Unix-domain sockets 2020-11-25 08:33:57 +01:00
mb Allow Unicode escapes in any server encoding, not only UTF-8. 2020-03-06 14:17:43 -05:00
nodes Properly check index mark/restore in ExecSupportsMarkRestore. 2020-11-24 21:58:32 +00:00
optimizer Move per-agg and per-trans duplicate finding to the planner. 2020-11-24 10:45:00 +02:00
parser Calculate extraUpdatedCols in query rewriter, not parser. 2020-10-28 13:47:02 -04:00
partitioning Improve error cursor positions for problems with partition bounds. 2020-09-23 18:04:53 -04:00
port Use https for gnu.org links 2020-10-14 08:24:54 +02:00
portability Update copyrights for 2020 2020-01-01 12:21:45 -05:00
postmaster Trigger autovacuum based on number of INSERTs 2020-03-28 19:20:12 +13:00
regex Assume that we have <wchar.h>. 2020-02-21 14:30:47 -05:00
replication Fix 'skip-empty-xacts' option in test_decoding for streaming mode. 2020-11-17 12:14:53 +05:30
rewrite Calculate extraUpdatedCols in query rewriter, not parser. 2020-10-28 13:47:02 -04:00
snowball Update snowball 2020-06-08 08:07:15 +02:00
statistics Initial pgindent and pgperltidy run for v13. 2020-05-14 13:06:50 -04:00
storage Add BarrierArriveAndDetachExceptLast(). 2020-11-19 18:13:46 +13:00
tcop Fix bogus completion tag usage in walsender 2020-09-16 21:16:25 -03:00
tsearch Improve behavior of tsearch_readline(), and remove t_readline(). 2020-09-23 20:26:58 -04:00
utils Avoid spamming the client with multiple ParameterStatus messages. 2020-11-25 11:40:44 -05:00
.gitignore Refactor dlopen() support 2018-09-06 11:33:04 +02:00
c.h Stop gap fix for __attribute__((cold)) compiler bug in MinGW 8.1 2020-11-25 16:33:43 +13:00
fmgr.h Use PG_GETARG_TRANSACTIONID where appropriate 2020-11-02 16:48:22 +01:00
funcapi.h Support for OUT parameters in procedures 2020-10-05 09:21:43 +02:00
getaddrinfo.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
getopt_long.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
Makefile Get rid of jsonpath_gram.h and jsonpath_scanner.h 2019-03-20 11:13:34 +03:00
miscadmin.h Add hash_mem_multiplier GUC. 2020-07-29 14:14:58 -07:00
pg_config_ext.h.in Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00
pg_config_manual.h Add nbtree Valgrind buffer lock checks. 2020-07-21 15:50:58 -07:00
pg_config.h.in Remove ability to independently select random number generator 2020-11-20 13:57:33 +01:00
pg_getopt.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
pg_trace.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
pgstat.h Track statistics for streaming of changes from ReorderBuffer. 2020-10-29 09:11:51 +05:30
pgtar.h Assorted cleanup of tar-related code. 2020-06-15 15:28:49 -04:00
pgtime.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
port.h Add pg_strong_random_init function to initialize random number generator 2020-11-06 13:21:28 +01:00
postgres_ext.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
postgres_fe.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
postgres.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
rusagestub.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
windowapi.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00