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Commitbdcc757

Browse files
committed
write_nondefault_variables must take care to write custom_variable_classes
first; otherwise backends reading the file might reject values of customvariables. Per experimentation with auto_explain.
1 parentccdb662 commitbdcc757

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1 file changed

+76
-59
lines changed
  • src/backend/utils/misc

1 file changed

+76
-59
lines changed

‎src/backend/utils/misc/guc.c‎

Lines changed: 76 additions & 59 deletions
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@
1010
* Written by Peter Eisentraut <peter_e@gmx.net>.
1111
*
1212
* IDENTIFICATION
13-
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.485 2009/01/0201:16:02 tgl Exp $
13+
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.486 2009/01/0202:02:10 tgl Exp $
1414
*
1515
*--------------------------------------------------------------------
1616
*/
@@ -6677,19 +6677,82 @@ is_newvalue_equal(struct config_generic * record, const char *newvalue)
66776677
#ifdefEXEC_BACKEND
66786678

66796679
/*
6680-
*This routine dumps out all non-default GUC options into a binary
6680+
*These routines dump out all non-default GUC options into a binary
66816681
*file that is read by all exec'ed backends. The format is:
66826682
*
66836683
*variable name, string, null terminated
66846684
*variable value, string, null terminated
66856685
*variable source, integer
66866686
*/
6687+
staticvoid
6688+
write_one_nondefault_variable(FILE*fp,structconfig_generic*gconf)
6689+
{
6690+
if (gconf->source==PGC_S_DEFAULT)
6691+
return;
6692+
6693+
fprintf(fp,"%s",gconf->name);
6694+
fputc(0,fp);
6695+
6696+
switch (gconf->vartype)
6697+
{
6698+
casePGC_BOOL:
6699+
{
6700+
structconfig_bool*conf= (structconfig_bool*)gconf;
6701+
6702+
if (*conf->variable)
6703+
fprintf(fp,"true");
6704+
else
6705+
fprintf(fp,"false");
6706+
}
6707+
break;
6708+
6709+
casePGC_INT:
6710+
{
6711+
structconfig_int*conf= (structconfig_int*)gconf;
6712+
6713+
fprintf(fp,"%d",*conf->variable);
6714+
}
6715+
break;
6716+
6717+
casePGC_REAL:
6718+
{
6719+
structconfig_real*conf= (structconfig_real*)gconf;
6720+
6721+
/* Could lose precision here? */
6722+
fprintf(fp,"%f",*conf->variable);
6723+
}
6724+
break;
6725+
6726+
casePGC_STRING:
6727+
{
6728+
structconfig_string*conf= (structconfig_string*)gconf;
6729+
6730+
fprintf(fp,"%s",*conf->variable);
6731+
}
6732+
break;
6733+
6734+
casePGC_ENUM:
6735+
{
6736+
structconfig_enum*conf= (structconfig_enum*)gconf;
6737+
6738+
fprintf(fp,"%s",
6739+
config_enum_lookup_by_value(conf,*conf->variable));
6740+
}
6741+
break;
6742+
}
6743+
6744+
fputc(0,fp);
6745+
6746+
fwrite(&gconf->source,sizeof(gconf->source),1,fp);
6747+
}
6748+
66876749
void
66886750
write_nondefault_variables(GucContextcontext)
66896751
{
6690-
inti;
66916752
intelevel;
66926753
FILE*fp;
6754+
structconfig_generic*cvc_conf;
6755+
inti;
66936756

66946757
Assert(context==PGC_POSTMASTER||context==PGC_SIGHUP);
66956758

@@ -6708,66 +6771,20 @@ write_nondefault_variables(GucContext context)
67086771
return;
67096772
}
67106773

6774+
/*
6775+
* custom_variable_classes must be written out first; otherwise we might
6776+
* reject custom variable values while reading the file.
6777+
*/
6778+
cvc_conf=find_option("custom_variable_classes", false,ERROR);
6779+
if (cvc_conf)
6780+
write_one_nondefault_variable(fp,cvc_conf);
6781+
67116782
for (i=0;i<num_guc_variables;i++)
67126783
{
67136784
structconfig_generic*gconf=guc_variables[i];
67146785

6715-
if (gconf->source!=PGC_S_DEFAULT)
6716-
{
6717-
fprintf(fp,"%s",gconf->name);
6718-
fputc(0,fp);
6719-
6720-
switch (gconf->vartype)
6721-
{
6722-
casePGC_BOOL:
6723-
{
6724-
structconfig_bool*conf= (structconfig_bool*)gconf;
6725-
6726-
if (*conf->variable==0)
6727-
fprintf(fp,"false");
6728-
else
6729-
fprintf(fp,"true");
6730-
}
6731-
break;
6732-
6733-
casePGC_INT:
6734-
{
6735-
structconfig_int*conf= (structconfig_int*)gconf;
6736-
6737-
fprintf(fp,"%d",*conf->variable);
6738-
}
6739-
break;
6740-
6741-
casePGC_REAL:
6742-
{
6743-
structconfig_real*conf= (structconfig_real*)gconf;
6744-
6745-
/* Could lose precision here? */
6746-
fprintf(fp,"%f",*conf->variable);
6747-
}
6748-
break;
6749-
6750-
casePGC_STRING:
6751-
{
6752-
structconfig_string*conf= (structconfig_string*)gconf;
6753-
6754-
fprintf(fp,"%s",*conf->variable);
6755-
}
6756-
break;
6757-
6758-
casePGC_ENUM:
6759-
{
6760-
structconfig_enum*conf= (structconfig_enum*)gconf;
6761-
6762-
fprintf(fp,"%s",config_enum_lookup_by_value(conf,*conf->variable));
6763-
}
6764-
break;
6765-
}
6766-
6767-
fputc(0,fp);
6768-
6769-
fwrite(&gconf->source,sizeof(gconf->source),1,fp);
6770-
}
6786+
if (gconf!=cvc_conf)
6787+
write_one_nondefault_variable(fp,gconf);
67716788
}
67726789

67736790
if (FreeFile(fp))

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