Handle out-of-memory situations inside the query flattener.

Ticket #2784. (CVS 4549)

FossilOrigin-Name: 2655a3f2d18fe16a36a6cf3776261ee0507e6912

test/mallocE.test

@@ -0,0 +1,39 @@
+# 2007 Aug 29
+#
+# 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 test script checks that ticket #2784 has been fixed.
+# 
+# $Id: mallocE.test,v 1.1 2007/11/21 15:24:01 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Only run these tests if memory debugging is turned on.
+#
+ifcapable !memdebug {
+   puts "Skipping mallocE tests: not compiled with -DSQLITE_MEMDEBUG..."
+   finish_test
+   return
+}
+source $testdir/malloc_common.tcl
+
+set PREP { 
+  PRAGMA page_size = 1024;
+  CREATE TABLE t1(a, b, c);
+  CREATE TABLE t2(x, y, z);
+}
+
+do_malloc_test mallocE-1 -sqlprep $PREP -sqlbody { 
+  SELECT p, q FROM (SELECT a+b AS p, b+c AS q FROM t1, t2 WHERE c>5)
+              LEFT JOIN t2 ON p=x;
+}
+
+finish_test