diff options
Diffstat (limited to 'src/backend/access/table/tableamapi.c')
| -rw-r--r-- | src/backend/access/table/tableamapi.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/backend/access/table/tableamapi.c b/src/backend/access/table/tableamapi.c index 55b8caeadf2..d9e23ef3175 100644 --- a/src/backend/access/table/tableamapi.c +++ b/src/backend/access/table/tableamapi.c @@ -13,9 +13,11 @@ #include "access/tableam.h" #include "access/xact.h" +#include "catalog/pg_am.h" #include "commands/defrem.h" #include "miscadmin.h" #include "utils/guc_hooks.h" +#include "utils/syscache.h" /* @@ -98,6 +100,29 @@ GetTableAmRoutine(Oid amhandler) return routine; } +/* + * GetTableAmRoutineByAmOid + * Given the table access method oid get its TableAmRoutine struct, which + * will be palloc'd in the caller's memory context. + */ +const TableAmRoutine * +GetTableAmRoutineByAmOid(Oid amoid) +{ + HeapTuple ht_am; + Form_pg_am amrec; + const TableAmRoutine *tableam = NULL; + + ht_am = SearchSysCache1(AMOID, ObjectIdGetDatum(amoid)); + if (!HeapTupleIsValid(ht_am)) + elog(ERROR, "cache lookup failed for access method %u", + amoid); + amrec = (Form_pg_am) GETSTRUCT(ht_am); + + tableam = GetTableAmRoutine(amrec->amhandler); + ReleaseSysCache(ht_am); + return tableam; +} + /* check_hook: validate new default_table_access_method */ bool check_default_table_access_method(char **newval, void **extra, GucSource source) |