Mention psql variable names are case-sensitive.

diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index 37ebdc045fcc094a5fb3c6b1594eaf26ed1a29ff..c9f0278ec907a0d499efb442312fb38ede271199 100644 (file)
--- a/doc/src/sgml/ref/psql-ref.sgml
+++ b/doc/src/sgml/ref/psql-ref.sgml
@@ -1,5 +1,5 @@
 
 
@@ -1613,6 +1613,7 @@ lo_import 152801
    underscores. See the section 
    linkend="APP-PSQL-variables"
    endterm="APP-PSQL-variables-title"> below for details.
+   Variable names are case-sensitive.