Bug#17284 erroneous temp table cleanup on slave.

  
     Idea of the fix is for master to send FD event with `created' as 0
     to reconnecting slave (upon slave_net_timeout, no master crash) to avoid destroying temp tables.
     In a case of a connect by slave to the master after its crash temp tables have been already
     cleaned up so that slave can not keep `orphan' temp tables.


mysql-test/r/rpl_temporary.result:
  results
mysql-test/t/rpl_temporary.test:
  wait-free addon to check temp tables are ok after slave reconnect.
sql/sql_repl.cc:
  Storing zero for assigning to `created' of FD event on the reconnecting slave.
mysql-test/include/get_binlog_dump_thread_id.inc:
  mysqltest's preudo-macro to calculate $id master dump thread id

mysql-test/include/get_binlog_dump_thread_id.inc

+--exec $MYSQL test -e 'show processlist' | grep 'Binlog Dump' | cut -f1 > $MYSQLTEST_VARDIR/tmp/bl_dump_thread_id
+--disable_warnings
+drop table if exists t999;
+--enable_warnings
+create temporary table t999 (f int);
+--replace_result $MYSQL_TEST_DIR "."
+eval LOAD DATA INFILE "$MYSQLTEST_VARDIR/tmp/bl_dump_thread_id" into table t999;
+let $id = `select f from t999`;
+drop table t999;

mysql-test/r/rpl_temporary.result

@@ -89,3 +89,17 @@ f
 7
 drop table t1,t2;
 create temporary table t3 (f int);
+create temporary table t4 (f int);
+create table t5 (f int);
+drop table if exists t999;
+create temporary table t999 (f int);
+LOAD DATA INFILE "./var/tmp/bl_dump_thread_id" into table t999;
+drop table t999;
+insert into t4 values (1);
+kill `select id from information_schema.processlist where command='Binlog Dump'`;
+insert into t5 select * from t4;
+select * from t5 /* must be 1 after reconnection */;
+f
+1
+drop temporary table t4;
+drop table t5;

mysql-test/t/rpl_temporary.test

@@ -129,6 +129,31 @@ drop table t1,t2;
 create temporary table t3 (f int);
 sync_with_master;
 
+#
+# Bug#17284 erroneous temp table cleanup on slave
+#
+
+connection master;
+create temporary table t4 (f int);
+create table t5 (f int);
+sync_with_master;
+# find dumper's $id
+source include/get_binlog_dump_thread_id.inc;
+insert into t4 values (1);
+# a hint how to do that in 5.1
+--replace_result $id "`select id from information_schema.processlist where command='Binlog Dump'`"
+eval kill $id; # to stimulate reconnection by slave w/o timeout
+insert into t5 select * from t4;
+save_master_pos;
+
+connection slave;
+sync_with_master;
+select * from t5 /* must be 1 after reconnection */;
+
+connection master;
+drop temporary table t4;
+drop table t5;
+
 # The server will now close done
 
-# End of 4.1 tests
+# End of 5.0 tests

sql/sql_repl.cc

@@ -466,6 +466,12 @@ impossible position";
            (rli->group_master_log_pos)
          */
          int4store((char*) packet->ptr()+LOG_POS_OFFSET+1, 0);
+         /*
+           if reconnect master sends FD event with `created' as 0
+           to avoid destroying temp tables.
+          */
+         int4store((char*) packet->ptr()+LOG_EVENT_MINIMAL_HEADER_LEN+
+                   ST_CREATED_OFFSET+1, (ulong) 0);
          /* send it */
          if (my_net_write(net, (char*)packet->ptr(), packet->length()))
          {