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Allow escaping of option values for options passed at connection start.

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This is useful to allow to set GUCs to values that include spaces;
something that wasn't previously possible. The primary case motivating
this is the desire to set default_transaction_isolation to 'repeatable
read' on a per connection basis, but other usecases like seach_path do
also exist.

This introduces a slight backward incompatibility: Previously a \ in
an option value would have been passed on literally, now it'll be
taken as an escape.

The relevant mailing list discussion starts with
20140204125823.GJ12016@awork2.anarazel.de.
This commit is contained in:
Andres Freund
2014-08-28 13:59:29 +02:00
parent e23014f3d4
commit 11a020eb6e
3 changed files with 43 additions and 17 deletions
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3
src/backend/postmaster/postmaster.c
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@@ -4083,8 +4083,7 @@ BackendRun(Port *port)
/*
* Pass any backend switches specified with -o on the postmaster's own
* command line. We assume these are secure. (It's OK to mangle
* ExtraOptions now, since we're safely inside a subprocess.)
* command line. We assume these are secure.
*/
pg_split_opts(av, &ac, ExtraOptions);