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write_nondefault_variables must take care to write custom_variable_classes 

first; otherwise backends reading the file might reject values of custom
variables.  Per experimentation with auto_explain.
This commit is contained in:
Tom Lane 2009-01-02 02:02:10 +00:00
parent ccdb6627ee
commit bdcc7576f4
1 changed files with 76 additions and 59 deletions
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135
src/backend/utils/misc/guc.c
View File

@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.485 2009/01/02 01:16:02 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.486 2009/01/02 02:02:10 tgl Exp $
*
*--------------------------------------------------------------------
*/
@ -6677,19 +6677,82 @@ is_newvalue_equal(struct config_generic * record, const char *newvalue)
#ifdef EXEC_BACKEND
/*
* This routine dumps out all non-default GUC options into a binary
* These routines dump out all non-default GUC options into a binary
* file that is read by all exec'ed backends. The format is:
*
* variable name, string, null terminated
* variable value, string, null terminated
* variable source, integer
*/
static void
write_one_nondefault_variable(FILE *fp, struct config_generic *gconf)
{
if (gconf->source == PGC_S_DEFAULT)
return;
fprintf(fp, "%s", gconf->name);
fputc(0, fp);
switch (gconf->vartype)
{
case PGC_BOOL:
{
struct config_bool *conf = (struct config_bool *) gconf;
if (*conf->variable)
fprintf(fp, "true");
else
fprintf(fp, "false");
}
break;
case PGC_INT:
{
struct config_int *conf = (struct config_int *) gconf;
fprintf(fp, "%d", *conf->variable);
}
break;
case PGC_REAL:
{
struct config_real *conf = (struct config_real *) gconf;
/* Could lose precision here? */
fprintf(fp, "%f", *conf->variable);
}
break;
case PGC_STRING:
{
struct config_string *conf = (struct config_string *) gconf;
fprintf(fp, "%s", *conf->variable);
}
break;
case PGC_ENUM:
{
struct config_enum *conf = (struct config_enum *) gconf;
fprintf(fp, "%s",
config_enum_lookup_by_value(conf, *conf->variable));
}
break;
}
fputc(0, fp);
fwrite(&gconf->source, sizeof(gconf->source), 1, fp);
}
void
write_nondefault_variables(GucContext context)
{
int i;
int elevel;
FILE *fp;
struct config_generic *cvc_conf;
int i;
Assert(context == PGC_POSTMASTER || context == PGC_SIGHUP);
@ -6708,66 +6771,20 @@ write_nondefault_variables(GucContext context)
return;
}
/*
* custom_variable_classes must be written out first; otherwise we might
* reject custom variable values while reading the file.
*/
cvc_conf = find_option("custom_variable_classes", false, ERROR);
if (cvc_conf)
write_one_nondefault_variable(fp, cvc_conf);
for (i = 0; i < num_guc_variables; i++)
{
struct config_generic *gconf = guc_variables[i];
if (gconf->source != PGC_S_DEFAULT)
{
fprintf(fp, "%s", gconf->name);
fputc(0, fp);
switch (gconf->vartype)
{
case PGC_BOOL:
{
struct config_bool *conf = (struct config_bool *) gconf;
if (*conf->variable == 0)
fprintf(fp, "false");
else
fprintf(fp, "true");
}
break;
case PGC_INT:
{
struct config_int *conf = (struct config_int *) gconf;
fprintf(fp, "%d", *conf->variable);
}
break;
case PGC_REAL:
{
struct config_real *conf = (struct config_real *) gconf;
/* Could lose precision here? */
fprintf(fp, "%f", *conf->variable);
}
break;
case PGC_STRING:
{
struct config_string *conf = (struct config_string *) gconf;
fprintf(fp, "%s", *conf->variable);
}
break;
case PGC_ENUM:
{
struct config_enum *conf = (struct config_enum *) gconf;
fprintf(fp, "%s", config_enum_lookup_by_value(conf, *conf->variable));
}
break;
}
fputc(0, fp);
fwrite(&gconf->source, sizeof(gconf->source), 1, fp);
}
if (gconf != cvc_conf)
write_one_nondefault_variable(fp, gconf);
}
if (FreeFile(fp))