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Re-add default_with_oids GUC to avoid breaking old dump files.

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After 578b229718 / the removal of WITH OIDS support, older dump files
containing
    SET default_with_oids = false;
either report unnecessary errors (as the subsequent tables have no
oids) or even fail to restore entirely (when using transaction mode).
To avoid that, re-add the GUC, but don't allow setting it to true.

Per complaint from Tom Lane.

Author: Amit Khandekar, editorialized by me
Discussion: https://postgr.es/m/CAJ3gD9dZyxrtL0rJfoNoOj6v7fJSDaXBngi9wy5XU8m-ioXhAA@mail.gmail.com
This commit is contained in:
Andres Freund 2019-01-14 15:30:24 -08:00
parent 0ad41cf537
commit de66987adb
3 changed files with 45 additions and 0 deletions
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37
src/backend/utils/misc/guc.c
View File

@ -209,6 +209,7 @@ static void assign_recovery_target_name(const char *newval, void *extra);
static bool check_recovery_target_lsn(char **newval, void **extra, GucSource source);
static void assign_recovery_target_lsn(const char *newval, void *extra);
static bool check_primary_slot_name(char **newval, void **extra, GucSource source);
static bool check_default_with_oids(bool *newval, void **extra, GucSource source);
/* Private functions in guc-file.l that need to be called from guc.c */
static ConfigVariable *ProcessConfigFileInternal(GucContext context,
@ -479,6 +480,12 @@ char *event_source;
bool row_security;
bool check_function_bodies = true;
/*
* This GUC exists solely for backward compatibility, check its definition for
* details.
*/
bool default_with_oids = false;
bool session_auth_is_superuser;
int log_min_error_statement = ERROR;
@ -1538,6 +1545,21 @@ static struct config_bool ConfigureNamesBool[] =
true,
NULL, NULL, NULL
},
/*
* WITH OIDS support, and consequently default_with_oids, was removed in
* PostgreSQL 12, but we tolerate the parameter being set to false to
* avoid unnecessarily breaking older dump files.
*/
{
{"default_with_oids", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
gettext_noop("WITH OIDS is no longer supported; this can only be false."),
NULL,
GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE
},
&default_with_oids,
false,
check_default_with_oids, NULL, NULL
},
{
{"logging_collector", PGC_POSTMASTER, LOGGING_WHERE,
gettext_noop("Start a subprocess to capture stderr output and/or csvlogs into log files."),
@ -11311,4 +11333,19 @@ check_primary_slot_name(char **newval, void **extra, GucSource source)
return true;
}
static bool
check_default_with_oids(bool *newval, void **extra, GucSource source)
{
if (*newval)
{
/* check the GUC's definition for an explanation */
GUC_check_errcode(ERRCODE_FEATURE_NOT_SUPPORTED);
GUC_check_errmsg("tables declared WITH OIDS are not supported");
return false;
}
return true;
}
#include "guc-file.c"

4
src/test/regress/expected/guc.out
View File

@ -767,3 +767,7 @@ NOTICE: text search configuration "no_such_config" does not exist
select func_with_bad_set();
ERROR: invalid value for parameter "default_text_search_config": "no_such_config"
reset check_function_bodies;
set default_with_oids to f;
-- Should not allow to set it to true.
set default_with_oids to t;
ERROR: tables declared WITH OIDS are not supported

4
src/test/regress/sql/guc.sql
View File

@ -288,3 +288,7 @@ set default_text_search_config = no_such_config;
select func_with_bad_set();
reset check_function_bodies;
set default_with_oids to f;
-- Should not allow to set it to true.
set default_with_oids to t;