New optimizations to detect early when queries return no rows due to

tables being empty.  This includes the EXISTS-to-JOIN optimization that
tries to transform EXISTS constraints into additional terms of the FROM
clause.

FossilOrigin-Name: e33da6d5dc964db817d1bc63c9083aecd93d49ee14d5198600b47eaf7c5b9331

1 files changed, 4 insertions, 4 deletions

diff --git a/test/json101.test b/test/json101.test
index e22902f86..7582d14a6 100644
--- a/test/json101.test
+++ b/test/json101.test
@@ -892,15 +892,15 @@ do_execsql_test json101-13.100 {
   INSERT INTO t2(id,json) VALUES(4,'{"value":4}');
   INSERT INTO t2(id,json) VALUES(5,'{"value":5}');
   INSERT INTO t2(id,json) VALUES(6,'{"value":6}');
-  SELECT * FROM t1 CROSS JOIN t2
+  SELECT *, 'NL' FROM t1 CROSS JOIN t2
    WHERE EXISTS(SELECT 1 FROM json_each(t1.json,'$.items') AS Z
                  WHERE Z.value==t2.id);
-} {1 {{"items":[3,5]}} 3 {{"value":3}} 1 {{"items":[3,5]}} 5 {{"value":5}}}
+} {1 {{"items":[3,5]}} 3 {{"value":3}} NL 1 {{"items":[3,5]}} 5 {{"value":5}} NL}
 do_execsql_test json101-13.110 {
-  SELECT * FROM t2 CROSS JOIN t1
+  SELECT *, 'NL' FROM t2 CROSS JOIN t1
    WHERE EXISTS(SELECT 1 FROM json_each(t1.json,'$.items') AS Z
                  WHERE Z.value==t2.id);
-} {3 {{"value":3}} 1 {{"items":[3,5]}} 5 {{"value":5}} 1 {{"items":[3,5]}}}
+} {3 {{"value":3}} 1 {{"items":[3,5]}} NL 5 {{"value":5}} 1 {{"items":[3,5]}} NL}
 
 # 2018-05-16
 # Incorrect fullkey output from json_each()