Always make sure the left-hand side of the IS NOT NULL operator is a

smiple column, not a general expression, before applying the IS NOT NULL query optimization. FossilOrigin-Name: 543f75a6abe3aa4f49df43e71a462702d40b3251
2011-04-08 21:35:26 +00:00
parent 1c152101ca
commit ea6dc4458b
4 changed files with 15 additions and 10 deletions
@@ -209,6 +209,8 @@ foreach {testid where index rows} {
  502  {x IS NULL}                          {} 100
  503  {x=1}                               t1x  50
  504  {x IS NOT NULL}                     t1x  25
+  505  {+x IS NOT NULL}                     {} 500
+  506  {upper(x) IS NOT NULL}               {} 500

 } {
  # Verify that the expected index is used with the expected row count