Merge tag 'upstream/2.1.1'

Upstream version 2.1.1

Conflicts:
	.gitignore

1 files changed, 44 insertions, 0 deletions

diff --git a/test/select6.test b/test/select6.test
index e0ff165..64a8519 100644
--- a/test/select6.test
+++ b/test/select6.test
@@ -22,6 +22,7 @@ ifcapable !subquery {
   finish_test
   return
 }
+set ::testprefix select6
 
 do_test select6-1.0 {
   execsql {
@@ -513,5 +514,48 @@ do_test select6-9.11 {
 } {2 12 3 13 4 14}
 
 
+#-------------------------------------------------------------------------
+# Test that if a UNION ALL sub-query that would otherwise be eligible for
+# flattening consists of two or more SELECT statements that do not all 
+# return the same number of result columns, the error is detected.
+#
+do_execsql_test 10.1 {
+  CREATE TABLE t(i,j,k);
+  CREATE TABLE j(l,m);
+  CREATE TABLE k(o);
+}
+
+set err [list 1 {SELECTs to the left and right of UNION ALL do not have the same number of result columns}]
+
+do_execsql_test 10.2 {
+  SELECT * FROM (SELECT * FROM t), j;
+}
+do_catchsql_test 10.3 {
+  SELECT * FROM t UNION ALL SELECT * FROM j
+} $err
+do_catchsql_test 10.4 {
+  SELECT * FROM (SELECT i FROM t UNION ALL SELECT l, m FROM j)
+} $err
+do_catchsql_test 10.5 {
+  SELECT * FROM (SELECT j FROM t UNION ALL SELECT * FROM j)
+} $err
+do_catchsql_test 10.6 {
+  SELECT * FROM (SELECT * FROM t UNION ALL SELECT * FROM j)
+} $err
+do_catchsql_test 10.7 {
+  SELECT * FROM (
+    SELECT * FROM t UNION ALL 
+    SELECT l,m,l FROM j UNION ALL
+    SELECT * FROM k
+  )
+} $err
+do_catchsql_test 10.8 {
+  SELECT * FROM (
+    SELECT * FROM k UNION ALL
+    SELECT * FROM t UNION ALL 
+    SELECT l,m,l FROM j 
+  )
+} $err
+
 
 finish_test