Excluded posibility of tmp_table_param.copy_field double deletion (BUG#14851).

mysql-test/r/kill.result:
  BUG#14851 test
mysql-test/t/kill.test:
  BUG#14851 test
sql/sql_class.cc:
  Debug prints are added.
sql/sql_select.cc:
  Allocation of tmp_join fixed to involve constructor (it is not related to the bug directly but might cause other problems).
  Excluded posibility of tmp_table_param.copy_field double deletion (BUG#14851).
sql/sql_select.h:
  JOINs constructor added, initialization of them fixed (it is not related to the bug directly but might cause other problems).

1 files changed, 48 insertions, 1 deletions

diff --git a/mysql-test/t/kill.test b/mysql-test/t/kill.test
index aada8dd2ef3..ebe4673beb3 100644
--- a/mysql-test/t/kill.test
+++ b/mysql-test/t/kill.test
@@ -12,7 +12,7 @@ connect (con2, localhost, root,,);
 #remember id of con1
 connection con1;
 --disable_warnings
-drop table if exists t1;
+drop table if exists t1, t2, t3;
 --enable_warnings
 
 create table t1 (kill_id int);
@@ -40,4 +40,51 @@ connection con2;
 select 4;
 drop table t1;
 
+disconnect con2;
+connection default;
+#
+# BUG#14851: killing long running subquery processed via a temporary table.
+#
+create table t1 (id int primary key);
+create table t2 (id int unsigned not null);
+
+connect (conn1, localhost, root,,);
+connection conn1;
+
+-- disable_result_log
+-- disable_query_log
+let $1 = 4096;
+while ($1)
+{
+  eval insert into t1 values ($1);
+  dec $1;
+}
+-- enable_query_log
+-- enable_result_log
+
+insert into t2 select id from t1;
+
+create table t3 (kill_id int);
+insert into t3 values(connection_id());
+
+-- disable_result_log
+send select id from t1 where id in (select distinct id from t2);
+-- enable_result_log
+
+connect (conn2, localhost, root,,);
+connection conn2;
+select ((@id := kill_id) - kill_id) from t3;
+-- sleep 1
+kill @id;
+
+connection conn1;
+-- error 1053
+reap;
+
+disconnect conn1;
+disconnect conn2;
+connection default;
+
+drop table t1, t2, t3;
+
 # End of 4.1 tests