C comment: add description of root_tuple_slot

Reported-by: Amit Langote Discussion: https://postgr.es/m/d2e6674c-c5c6-fe89-1d0b-3534b9db0476@lab.ntt.co.jp
8 years ago · 7551d9bc40
parent bdf46af748
commit 7551d9bc40
1 changed files with 4 additions and 0 deletions
--- a/src/include/executor/execPartition.h
+++ b/src/include/executor/execPartition.h
@ -90,6 +90,10 @@ typedef struct PartitionDispatchData *PartitionDispatch;
 *								given leaf partition's rowtype after that
 *								partition is chosen for insertion by
 *								tuple-routing.
+ * root_tuple_slot				TupleTableSlot to be used to transiently hold
+ *								copy of a tuple that's being moved across
+ *								partitions in the root partitioned table's
+ *								rowtype
 *-----------------------
 */
 typedef struct PartitionTupleRouting