HAWQ-1756. add comment for struct TargetSegmentIDMap.
diff --git a/src/backend/cdb/cdbdatalocality.c b/src/backend/cdb/cdbdatalocality.c
index 6e95130..d2cfd72 100644
--- a/src/backend/cdb/cdbdatalocality.c
+++ b/src/backend/cdb/cdbdatalocality.c
@@ -260,9 +260,9 @@
* structure for target segment ID mapping.
*/
typedef struct TargetSegmentIDMap {
- int target_segment_num;
- int *global_IDs;
- char** hostname;
+ int target_segment_num; // number of virtual segments
+ int *global_IDs; // virtual segment number -> global hostIndex
+ char** hostname; // hostname of each virtual segment
} TargetSegmentIDMap;
/*
