From 33745c670d7bb0a1e7ed0e407d4fb9de4ace01bd Mon Sep 17 00:00:00 2001
From: tanghy <tanghy.fnst@cn.fujitsu.com>
Date: Mon, 8 Feb 2021 19:51:49 +0900
Subject: [PATCH] Support tab completion for upper character inputs in psql
 when use set/reset/show


diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
index 5f0e775fd3..f92a7d9499 100644
--- a/src/bin/psql/tab-complete.c
+++ b/src/bin/psql/tab-complete.c
@@ -725,14 +725,16 @@ static const SchemaQuery Query_for_list_of_statistics = {
 "  UNION ALL SELECT 'role' "\
 "  UNION ALL SELECT 'tablespace' "\
 "  UNION ALL SELECT 'all') ss "\
-" WHERE substring(name,1,%d)='%s'"
+" WHERE substring(name,1,%1$d)='%2$s' "\
+"    OR pg_catalog.lower(substring(name,1,%1$d))=pg_catalog.lower('%2$s')"
 
 #define Query_for_list_of_show_vars \
 "SELECT name FROM "\
 " (SELECT pg_catalog.lower(name) AS name FROM pg_catalog.pg_settings "\
 "  UNION ALL SELECT 'session authorization' "\
 "  UNION ALL SELECT 'all') ss "\
-" WHERE substring(name,1,%d)='%s'"
+" WHERE substring(name,1,%1$d)='%2$s' "\
+"    OR pg_catalog.lower(substring(name,1,%1$d))=pg_catalog.lower('%2$s')"
 
 #define Query_for_list_of_roles \
 " SELECT pg_catalog.quote_ident(rolname) "\
-- 
2.30.0.windows.2