1 files changed, 183 insertions, 0 deletions
diff --git a/mysql-test/include/update_use_source_cases.inc b/mysql-test/include/update_use_source_cases.inc
new file mode 100644
index 00000000..f1025f75
--- /dev/null
+++ b/mysql-test/include/update_use_source_cases.inc
@@ -0,0 +1,183 @@
+--echo #
+--echo # Update with value from subquery on the same table
+--echo #
+
+analyze table t1 persistent for all;
+let $q = update t1 set c1=(select a.c3 from t1 a where a.c3 = t1.c3);
+eval explain select * from t1;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update with EXISTS subquery over the updated table
+--echo # in WHERE + possibly sargable condition
+--echo #
+
+analyze table t1 persistent for all;
+let $c = c1 <2
+          and exists (select 'X' from t1 a where a.c1 = t1.c1);
+let $q = update t1 set c1=10 where $c;
+eval explain select * from t1 where $c;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update with EXISTS subquery over the updated table
+--echo # in WHERE + non-sargable condition
+--echo #
+
+analyze table t1 persistent for all;
+let $c = exists (select 'X' from t1 a where a.c2 = t1.c2) and c2 >= 3;
+let $q = update t1 set c1=c1+10 where $c;
+eval explain select * from t1 where $c;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update with order by
+--echo #
+
+analyze table t1 persistent for all;
+let $c = exists (select 'X' from t1 a where a.c2 = t1.c2)
+            and c2 >= 3 order by c2;
+let $q = update t1 set c1=c1+10 where $c;
+eval explain select * from t1 where $c;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update with a reference to view in subquery
+--echo # in settable value
+--echo #
+
+analyze table t1 persistent for all;
+let $q = update t1 set c1=c1 +(select max(a.c2) from v1 a
+                              where a.c1 = t1.c1);
+eval explain select * from t1;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update view
+--echo #
+
+analyze table t1 persistent for all;
+let $q = update v1 set c1=c1 + (select max(a.c2) from t1 a
+                                 where a.c1 = v1.c1) +10 where c3 > 3;
+eval explain select * from v1;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update view with reference to the same view in subquery
+--echo #
+
+analyze table t1 persistent for all;
+let $c = c1 <2
+         and exists (select 'X' from v1 a where a.c1 = v1.c1);
+let $q = update v1 set c1=c1 + 1 where $c;
+eval explain select * from v1 where $c;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update view with EXISTS and reference to the same view in subquery
+--echo #
+
+analyze table t1 persistent for all;
+let $c = c1 <10 and exists (select 'X' from v1 a where a.c2 = v1.c2);
+let $q = update v1
+      set c1=(select max(a.c1)+10 from v1 a where a.c1 = v1.c1)
+          where $c;
+eval explain select * from v1 where $c;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update with IN predicand over the updated table in WHERE
+--echo #
+
+analyze table t1 persistent for all;
+let $c = c2 in (select distinct a.c2 from t1 a where t1.c1=a.c1);
+let $q = update t1 set c3=c3+110 where $c;
+eval explain select * from t1 where $c;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+--sorted_result
+select c3 from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update with a limit
+--echo #
+
+analyze table t1 persistent for all;
+let $q = update t1
+         set c1=(select a.c3 from t1 a where a.c3 = t1.c3) limit 2;
+eval explain select * from t1 limit 2;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;
+
+--echo #
+--echo # Update with a limit and an order by
+--echo #
+
+analyze table t1 persistent for all;
+let $q=update t1
+         set c1=(select a.c3 from t1 a where a.c3 = t1.c3)
+            order by c3 desc limit 2;
+eval explain select * from t1 order by c3 desc limit 2;
+eval explain $q;
+--enable_info ONCE
+eval $q;
+select concat(old_c1,'->',c1),c3,
+   case when c1 != old_c1 then '*' else ' ' end "Changed" from t1;
+truncate table t1;
+insert into t1 select * from tmp;