ADDED   test/selectC.test
Index: test/selectC.test
==================================================================
--- test/selectC.test
+++ test/selectC.test
@@ -0,0 +1,73 @@
+# 2008 September 16
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. 
+#
+# $Id: selectC.test,v 1.1 2008/09/16 15:09:54 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+do_test selectC-1.1 {
+  execsql {
+    CREATE TABLE t1(a, b, c);
+    INSERT INTO t1 VALUES(1,'aaa','bbb');
+    INSERT INTO t1 SELECT * FROM t1;
+    INSERT INTO t1 VALUES(2,'ccc','ddd');
+
+    SELECT DISTINCT a AS x, b||c AS y
+      FROM t1
+     WHERE y IN ('aaabbb','xxx');
+  }
+} {1 aaabbb}
+do_test selectC-1.2 {
+  execsql {
+    SELECT DISTINCT a AS x, b||c AS y
+      FROM t1
+     WHERE b||c IN ('aaabbb','xxx');
+  }
+} {1 aaabbb}
+do_test selectC-1.3 {
+  execsql {
+    SELECT DISTINCT a AS x, b||c AS y
+      FROM t1
+     WHERE y='aaabbb'
+  }
+} {1 aaabbb}
+do_test selectC-1.4 {
+  execsql {
+    SELECT DISTINCT a AS x, b||c AS y
+      FROM t1
+     WHERE b||c='aaabbb'
+  }
+} {1 aaabbb}
+do_test selectC-1.5 {
+  execsql {
+    SELECT DISTINCT a AS x, b||c AS y
+      FROM t1
+     WHERE x=2
+  }
+} {2 cccddd}
+do_test selectC-1.6 {
+  execsql {
+    SELECT DISTINCT a AS x, b||c AS y
+      FROM t1
+     WHERE a=2
+  }
+} {2 cccddd}
+do_test selectC-1.7 {
+  execsql {
+    SELECT DISTINCT a AS x, b||c AS y
+      FROM t1
+     WHERE +y='aaabbb'
+  }
+} {1 aaabbb}
+
+finish_test