Enable the count-of-view optimization by default.

Enhancement request [eaed8e36ce888f1e]. FossilOrigin-Name: a4aacdd323a854d771c8cb1e2e4cfc4fb66b0020cfed23525733603605f5c63b
2023-02-22 21:47:02 +00:00
parent 95dee6d2e3
commit af03eb3241
4 changed files with 29 additions and 13 deletions
@@ -163,4 +163,25 @@ do_eqp_test 3.6 {
 # We want both arms of the compound subquery to use the
 # primary key.

+# The following is a test of the count-of-view optimization.  This does
+# not have anything to do with push-down.  It is here because this is a
+# convenient place to put the test.
+#
+do_execsql_test 3.7 {
+  SELECT count(*) FROM v3;
+} 6
+do_eqp_test 3.8 {
+  SELECT count(*) FROM v3;
+} {
+  QUERY PLAN
+  |--SCAN CONSTANT ROW
+  |--SCALAR SUBQUERY xxxxxx
+  |  `--SCAN t1
+  `--SCALAR SUBQUERY xxxxxx
+     `--SCAN t2
+}
+# ^^^^^^^^^^^^^^^^^^^^
+# The query should be converted into:
+#   SELECT (SELECT count(*) FROM t1)+(SELECT count(*) FROM t2)
+
 finish_test