diff options
Diffstat (limited to 'src/backend/utils/adt/domains.c')
| -rw-r--r-- | src/backend/utils/adt/domains.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/src/backend/utils/adt/domains.c b/src/backend/utils/adt/domains.c index 0aaa9b8be16..5b58ee81a09 100644 --- a/src/backend/utils/adt/domains.c +++ b/src/backend/utils/adt/domains.c @@ -25,7 +25,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/adt/domains.c,v 1.8 2009/01/01 17:23:49 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/domains.c,v 1.9 2009/09/09 19:00:09 petere Exp $ * *------------------------------------------------------------------------- */ @@ -302,3 +302,40 @@ domain_recv(PG_FUNCTION_ARGS) else PG_RETURN_DATUM(value); } + +/* + * domain_check - check that a datum satisfies the constraints of a + * domain. extra and mcxt can be passed if they are available from, + * say, a FmgrInfo structure, or they can be NULL, in which case the + * setup is repeated for each call. + */ +void +domain_check(Datum value, bool isnull, Oid domainType, void **extra, MemoryContext mcxt) +{ + DomainIOData *my_extra = NULL; + + if (mcxt == NULL) + mcxt = CurrentMemoryContext; + + /* + * We arrange to look up the needed info just once per series of calls, + * assuming the domain type doesn't change underneath us. + */ + if (extra) + my_extra = (DomainIOData *) *extra; + if (my_extra == NULL) + { + my_extra = (DomainIOData *) MemoryContextAlloc(mcxt, + sizeof(DomainIOData)); + domain_state_setup(my_extra, domainType, true, mcxt); + if (extra) + *extra = (void *) my_extra; + } + else if (my_extra->domain_type != domainType) + domain_state_setup(my_extra, domainType, true, mcxt); + + /* + * Do the necessary checks to ensure it's a valid domain value. + */ + domain_check_input(value, isnull, my_extra); +} |