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In the continuing saga of FE/BE protocol revisions, add reporting of

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initial values and runtime changes in selected parameters.  This gets
rid of the need for an initial 'select pg_client_encoding()' query in
libpq, bringing us back to one message transmitted in each direction
for a standard connection startup.  To allow server version to be sent
using the same GUC mechanism that handles other parameters, invent the
concept of a never-settable GUC parameter: you can 'show server_version'
but it's not settable by any GUC input source.  Create 'lc_collate' and
'lc_ctype' never-settable parameters so that people can find out these
settings without need for pg_controldata.  (These side ideas were all
discussed some time ago in pgsql-hackers, but not yet implemented.)
This commit is contained in:
Tom Lane
2003-04-25 19:45:10 +00:00
parent a2190c9eb6
commit 9cbaf72177
13 changed files with 412 additions and 478 deletions
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9
src/backend/access/transam/xlog.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.113 2003/04/18 01:03:41 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.114 2003/04/25 19:45:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -36,6 +36,7 @@
#include "storage/sinval.h"
#include "storage/spin.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "utils/relcache.h"
#include "miscadmin.h"
@ -2260,6 +2261,12 @@ ReadControlFile(void)
"\twhich is not recognized by setlocale().\n"
"\tIt looks like you need to initdb.",
ControlFile->lc_ctype);
/* Make the fixed locale settings visible as GUC variables, too */
SetConfigOption("lc_collate", ControlFile->lc_collate,
PGC_INTERNAL, PGC_S_OVERRIDE);
SetConfigOption("lc_ctype", ControlFile->lc_ctype,
PGC_INTERNAL, PGC_S_OVERRIDE);
}
void