make values work in subquery

testing/values.test

@@ -0,0 +1,19 @@
+#!/usr/bin/env tclsh
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+do_execsql_test values-1 {
+    values(1, 2);
+} {1|2};
+
+do_execsql_test values-2 {
+    values(1, 2), (3, 4);
+} {1|2
+3|4};
+
+do_execsql_test values-in-from {
+  select * from (values(3, 4, 5), (5, 6, 7), (8, 9, 10));
+} {3|4|5
+  5|6|7
+  8|9|10};