Enabled engine_condition_pushdown (on) as default

mysql-test/r/ndb_basic.result

@@ -568,7 +568,7 @@ t1
 insert into t1 values (1,1),(2,1),(3,1),(4,1),(5,2),(6,1),(7,1);
 explain select * from t1 where a12345678901234567890123456789a1234567890=2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	a12345678901234567890123456789a1234567890	a12345678901234567890123456789a1234567890	5	const	#	Using where
+1	SIMPLE	t1	ref	a12345678901234567890123456789a1234567890	a12345678901234567890123456789a1234567890	5	const	#	Using where with pushed condition
 select * from t1 where a12345678901234567890123456789a1234567890=2;
 a1234567890123456789012345678901234567890	a12345678901234567890123456789a1234567890
 5	2

mysql-test/r/ndb_blob.result

@@ -242,7 +242,7 @@ insert into t1 values(9,'b9',999,'dd9');
 commit;
 explain select * from t1 where c >= 100 order by a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	c	c	4	NULL	#	Using where; Using filesort
+1	SIMPLE	t1	range	c	c	4	NULL	#	Using where with pushed condition; Using filesort
 select * from t1 where c >= 100 order by a;
 a	b	c	d
 1	b1	111	dd1
@@ -278,7 +278,7 @@ insert into t1 values(2,@b2,222,@d2);
 commit;
 explain select * from t1 where c >= 100 order by a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	c	c	4	NULL	#	Using where; Using filesort
+1	SIMPLE	t1	range	c	c	4	NULL	#	Using where with pushed condition; Using filesort
 select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
 from t1 where c >= 100 order by a;
 a	length(b)	substr(b,1+2*900,2)	length(d)	substr(d,1+3*900,3)

sql/mysqld.cc

@@ -5077,7 +5077,7 @@ struct my_option my_long_options[] =
    "Push supported query conditions to the storage engine.",
    (gptr*) &global_system_variables.engine_condition_pushdown,
    (gptr*) &global_system_variables.engine_condition_pushdown,
-   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
+   0, GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0},
   /* See how it's handled in get_one_option() */
   {"event-scheduler", OPT_EVENT_SCHEDULER, "Enable/disable the event scheduler.",
    NULL,  NULL, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0},