diff options
Diffstat (limited to 'src/backend/utils/misc/guc.c')
| -rw-r--r-- | src/backend/utils/misc/guc.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c index 4c94f09c645..b3fd42e0f18 100644 --- a/src/backend/utils/misc/guc.c +++ b/src/backend/utils/misc/guc.c @@ -9635,6 +9635,45 @@ GetConfigOptionByName(const char *name, const char **varname, bool missing_ok) } /* + * Return some of the flags associated to the specified GUC in the shape of + * a text array, and NULL if it does not exist. An empty array is returned + * if the GUC exists without any meaningful flags to show. + */ +Datum +pg_settings_get_flags(PG_FUNCTION_ARGS) +{ +#define MAX_GUC_FLAGS 5 + char *varname = TextDatumGetCString(PG_GETARG_DATUM(0)); + struct config_generic *record; + int cnt = 0; + Datum flags[MAX_GUC_FLAGS]; + ArrayType *a; + + record = find_option(varname, false, true, ERROR); + + /* return NULL if no such variable */ + if (record == NULL) + PG_RETURN_NULL(); + + if (record->flags & GUC_EXPLAIN) + flags[cnt++] = CStringGetTextDatum("EXPLAIN"); + if (record->flags & GUC_NO_RESET_ALL) + flags[cnt++] = CStringGetTextDatum("NO_RESET_ALL"); + if (record->flags & GUC_NO_SHOW_ALL) + flags[cnt++] = CStringGetTextDatum("NO_SHOW_ALL"); + if (record->flags & GUC_NOT_IN_SAMPLE) + flags[cnt++] = CStringGetTextDatum("NOT_IN_SAMPLE"); + if (record->flags & GUC_RUNTIME_COMPUTED) + flags[cnt++] = CStringGetTextDatum("RUNTIME_COMPUTED"); + + Assert(cnt <= MAX_GUC_FLAGS); + + /* Returns the record as Datum */ + a = construct_array(flags, cnt, TEXTOID, -1, false, TYPALIGN_INT); + PG_RETURN_ARRAYTYPE_P(a); +} + +/* * Return GUC variable value by variable number; optionally return canonical * form of name. Return value is palloc'd. */ |