Update file header comments for logical/relation.c.

Author: Amit Langote
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/CA+HiwqE20oZoix13JyCeALpTf_SmjarZWtBFe5sND6zz+iupAw@mail.gmail.com

diff --git a/src/backend/replication/logical/relation.c b/src/backend/replication/logical/relation.c
index 9ee70a2563e482534a9cfa7bc362f4ac006e1595..2bb8e7d57b366ae6ffec6f203359357670d0e4ae 100644 (file)
--- a/src/backend/replication/logical/relation.c
+++ b/src/backend/replication/logical/relation.c
@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  * relation.c
- *        PostgreSQL logical replication
+ *        PostgreSQL logical replication relation mapping cache
  *
  * Copyright (c) 2016-2020, PostgreSQL Global Development Group
  *
@@ -8,8 +8,9 @@
  *       src/backend/replication/logical/relation.c
  *
  * NOTES
- *       This file contains helper functions for logical replication relation
- *       mapping cache.
+ *       Routines in this file mainly have to do with mapping the properties
+ *       of local replication target relations to the properties of their
+ *       remote counterpart.
  *
  *-------------------------------------------------------------------------
  */