Add a test for #15469

tests/queries/0_stateless/01748_dictionary_table_dot.reference

@@ -0,0 +1 @@
+Hello

tests/queries/0_stateless/01748_dictionary_table_dot.sql

@@ -0,0 +1,34 @@
+DROP DATABASE IF EXISTS test_01748;
+CREATE DATABASE test_01748;
+USE test_01748;
+
+DROP TABLE IF EXISTS `test.txt`;
+DROP DICTIONARY IF EXISTS test_dict;
+
+CREATE TABLE `test.txt`
+(
+    `key1` UInt32,
+    `key2` UInt32,
+    `value` String
+)
+ENGINE = Memory();
+
+CREATE DICTIONARY test_dict
+(
+    `key1` UInt32,
+    `key2` UInt32,
+    `value` String
+)
+PRIMARY KEY key1, key2
+SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE `test.txt` PASSWORD '' DB currentDatabase()))
+LIFETIME(MIN 1 MAX 3600)
+LAYOUT(COMPLEX_KEY_HASHED());
+
+INSERT INTO `test.txt` VALUES (1, 2, 'Hello');
+
+-- TODO: it does not work without fully qualified name.
+SYSTEM RELOAD DICTIONARY test_01748.test_dict;
+
+SELECT dictGet(test_dict, 'value', (toUInt32(1), toUInt32(2)));
+
+DROP DATABASE test_01748;