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Add session_preload_libraries configuration parameter

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This is like shared_preload_libraries except that it takes effect at
backend start and can be changed without a full postmaster restart.  It
is like local_preload_libraries except that it is still only settable by
a superuser.  This can be a better way to load modules such as
auto_explain.

Since there are now three preload parameters, regroup the documentation
a bit.  Put all parameters into one section, explain common
functionality only once, update the descriptions to reflect current and
future realities.

Reviewed-by: Dimitri Fontaine <dimitri@2ndQuadrant.fr>
This commit is contained in:
Peter Eisentraut
2013-06-12 22:28:24 -04:00
parent f3ab5d4696
commit 070518ddab
7 changed files with 193 additions and 124 deletions
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src/backend/tcop/postgres.c
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@ -3743,7 +3743,7 @@ PostgresMain(int argc, char *argv[],
* process any libraries that should be preloaded at backend start (this
* likewise can't be done until GUC settings are complete)
*/
process_local_preload_libraries();
process_session_preload_libraries();
/*
* Send this backend's cancellation info to the frontend.