commit f2e0482b16ff6f4e993c0540ae7f5a45a55fce03
author ZongtianHou <houzongtian@outlook.com> Sun Nov 17 17:34:13 2019 +0800
committer ZongtianHou <houzongtian@outlook.com> Mon Nov 18 10:03:59 2019 +0800
tree 48d9e474fdf2ccbd8d1d5fccde0f477bff644be1
parent da2623e86f789102d46504921ffa8db9ccc787ca

HAWQ-2742. add comment for enforce virtual segment number.

src/backend/cdb/cdbdatalocality.c

diff --git a/src/backend/cdb/cdbdatalocality.c b/src/backend/cdb/cdbdatalocality.c
index e5e54cd..6e95130 100644
--- a/src/backend/cdb/cdbdatalocality.c
+++ b/src/backend/cdb/cdbdatalocality.c
@@ -4643,6 +4643,10 @@
 			}
 
 			if (enforce_virtual_segment_number > 0) {
+			  /*
+			   * this is the last factor to determine the virtual segment number,
+			   * it has the highest priority in all conditions.
+			   */
 				maxTargetSegmentNumber = enforce_virtual_segment_number;
 				minTargetSegmentNumber = enforce_virtual_segment_number;
 			}