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Changes to test/where9.test.

   777    777     catchsql {
   778    778       UPDATE t1 INDEXED BY t1b SET a=a+100
   779    779        WHERE (+b IS NULL AND c NOT NULL AND d NOT NULL)
   780    780           OR (b NOT NULL AND c IS NULL AND d NOT NULL)
   781    781           OR (b NOT NULL AND c NOT NULL AND d IS NULL)
   782    782     }
   783    783   } {1 {no query solution}}
          784  +
          785  +set solution_possible 0
   784    786   ifcapable stat4||stat3 {
          787  +  if {[permutation] != "no_optimization"} { set solution_possible 1 }
          788  +}
          789  +if $solution_possible {
   785    790     # When STAT3 is enabled, the "b NOT NULL" terms get translated
   786    791     # into b>NULL, which can be satified by the index t1b.  It is a very
   787    792     # expensive way to do the query, but it works, and so a solution is possible.
   788    793     do_test where9-6.8.3-stat4 {
   789    794       catchsql {
   790    795         UPDATE t1 INDEXED BY t1b SET a=a+100
   791    796          WHERE (b IS NULL AND c NOT NULL AND d NOT NULL)