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Set pg_setting.pending_restart when pertinent config lines are removed
This changes the behavior of examining the pg_file_settings view after changing a config option that requires restart. The user needs to know that any change of such options does not take effect until a restart, and this worked correctly if the line is edited without removing it. However, for the case where the line is removed altogether, the flag doesn't get set, because a flag was only set in set_config_option, but that's not called for lines removed. Repair. (Ref.: commits62d16c7fc5
anda486e35706
) Author: Álvaro Herrera <alvherre@alvh.no-ip.org> Reviewed-by: Daniel Gustafsson <daniel@yesql.se> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/202107262302.xsfdfc5sb7sh@alvherre.pgsql
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@ -347,6 +347,8 @@ ProcessConfigFileInternal(GucContext context, bool applySettings, int elevel)
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continue;
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if (gconf->context < PGC_SIGHUP)
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{
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/* The removal can't be effective without a restart */
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gconf->status |= GUC_PENDING_RESTART;
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ereport(elevel,
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(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
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errmsg("parameter \"%s\" cannot be changed without restarting the server",
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