A subquery in the result set of a SELECT should be able to look into outer

queries to find variable references.  But a subquery in the FROM clause
should not be able to do this.  Ticket #3530. (CVS 5998)

FossilOrigin-Name: be03fa0543044dc46952695e963d9b82afed892b

test/tkt3346.test

@@ -12,7 +12,7 @@
 # This file implements regression tests for SQLite library.  The
 # focus of this file is testing the fix for ticket #3346
 #
-# $Id: tkt3346.test,v 1.1 2008/09/01 15:52:11 drh Exp $
+# $Id: tkt3346.test,v 1.2 2008/12/09 13:04:29 drh Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -28,4 +28,22 @@ do_test tkt3346-1.1 {
   }
 } {2 bob 0 1 alice 1 3 claire 0}
 
+# Ticket #3530
+#
+# As shown by ticket #3346 above (see also ticket #3298) it is important
+# that a subquery in the result-set be able to look up through multiple
+# FROM levels in order to view tables in the FROM clause at the top level.
+#
+# But ticket #3530 shows us that a subquery in the FROM clause should not
+# be able to look up to higher levels:
+#
+do_test tkt3346-2.1 {
+  catchsql {
+    CREATE TABLE t2(a);
+    INSERT INTO t2 VALUES(1);
+    
+    SELECT * FROM (SELECT * FROM t1 WHERE 1=x.a) AS x;
+  }
+} {1 {no such column: x.a}}
+
 finish_test