diff options
Diffstat (limited to 'src/backend/access/table/tableam.c')
| -rw-r--r-- | src/backend/access/table/tableam.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/backend/access/table/tableam.c b/src/backend/access/table/tableam.c index baba1ea699b..6e46befdfd9 100644 --- a/src/backend/access/table/tableam.c +++ b/src/backend/access/table/tableam.c @@ -213,6 +213,33 @@ table_index_fetch_tuple_check(Relation rel, } +/* ------------------------------------------------------------------------ + * Functions for non-modifying operations on individual tuples + * ------------------------------------------------------------------------ + */ + +void +table_get_latest_tid(TableScanDesc scan, ItemPointer tid) +{ + Relation rel = scan->rs_rd; + const TableAmRoutine *tableam = rel->rd_tableam; + + /* + * Since this can be called with user-supplied TID, don't trust the input + * too much. + */ + if (!tableam->tuple_tid_valid(scan, tid)) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("tid (%u, %u) is not valid for relation for relation \"%s\"", + ItemPointerGetBlockNumberNoCheck(tid), + ItemPointerGetOffsetNumberNoCheck(tid), + RelationGetRelationName(rel)))); + + return tableam->tuple_get_latest_tid(scan, tid); +} + + /* ---------------------------------------------------------------------------- * Functions to make modifications a bit simpler. * ---------------------------------------------------------------------------- |