Fixed behavior of LOAD DATA with subqueries in SET clause.

The idea is to use TABLE_LIST::lock_type for passing type of lock for
target table to mysql_load() instead of using LEX::lock_option 
(which were rewritten by first subselect in SET clause).

This should also fix potential problem with LOAD DATA in SP
(it is important for them to have right lock_type in the table
 list by the end of statement parsing).


mysql-test/r/loaddata.result:
  Added nice test for LOAD DATA with subquery.
mysql-test/t/loaddata.test:
  Added nice test for LOAD DATA with subquery.
sql/log_event.cc:
  Now we don't pass type of lock for target table to mysql_load()
  explicitly . Instead we use TABLE_LIST::lock_type for this table
  which is already properly set here.
sql/mysql_priv.h:
  Now we don't pass type of lock for target table to mysql_load()
  explicitly . Instead we properly set TABLE_LIST::lock_type for
  this table in parser.
sql/sql_load.cc:
  Now we don't pass type of lock for target table to mysql_load()
  explicitly . Instead we properly set TABLE_LIST::lock_type for
  this table in parser.
sql/sql_parse.cc:
  Now we don't pass type of lock for target table to mysql_load()
  explicitly . Instead we properly set TABLE_LIST::lock_type for
  this table in parser.
sql/sql_yacc.yy:
  load_data:
    Let us use TABLE_LIST::lock_type for passing type of lock for target
    table to mysql_load() instead of using LEX::lock_option (which will
    be rewritten by first subselect in SET clause).

1 files changed, 11 insertions, 2 deletions

diff --git a/mysql-test/t/loaddata.test b/mysql-test/t/loaddata.test
index d384b955212..14ef749c802 100644
--- a/mysql-test/t/loaddata.test
+++ b/mysql-test/t/loaddata.test
@@ -3,7 +3,7 @@
 #
 
 --disable_warnings
-drop table if exists t1;
+drop table if exists t1, t2;
 --enable_warnings
 
 create table t1 (a date, b date, c date not null, d date);
@@ -64,4 +64,13 @@ select * from t1;
 # and this should bark
 --error 1409 
 load data infile '../../std_data/loaddata5.dat' into table t1 fields terminated by '' enclosed by '' (a, @b);
-drop table t1;
+
+# Now let us test LOAD DATA with subselect
+create table t2 (num int primary key, str varchar(10));
+insert into t2 values (10,'Ten'), (15,'Fifteen');
+truncate table t1;
+load data infile '../../std_data/rpl_loaddata.dat' into table t1 (@dummy,@n) set a= @n, c= (select str from t2 where num=@n);
+select * from t1;
+
+# cleanup
+drop table t1, t2;