Bug#27586: Wrong autoinc value assigned by LOAD DATA in the

NO_AUTO_VALUE_ON_ZERO mode.

The table->auto_increment_field_not_null variable wasn't reset after
reading a row which may lead to inserting a wrong value to the auto-increment
field to the following row.

The table->auto_increment_field_not_null variable is reset now right after a
row is being written in the read_fixed_length() and the read_sep_field()
functions.
Removed wrong setting of the table->auto_increment_field_not_null variable in
the read_sep_field() function.

mysql-test/r/loaddata.result

@@ -156,3 +156,12 @@ select load_file("MYSQL_TEST_DIR/t/loaddata.test");
 load_file("MYSQL_TEST_DIR/t/loaddata.test")
 NULL
 drop table t1, t2;
+create table t1(f1 int);
+insert into t1 values(1),(null);
+create table t2(f2 int auto_increment primary key);
+select * from t2;
+f2
+1
+2
+SET @@SQL_MODE=@OLD_SQL_MODE;
+drop table t1,t2;

mysql-test/t/loaddata.test

@@ -136,4 +136,20 @@ eval select load_file("$MYSQL_TEST_DIR/t/loaddata.test");
 # cleanup
 drop table t1, t2;
 
+#
+# Bug#27586: Wrong autoinc value assigned by LOAD DATA in the
+#            NO_AUTO_VALUE_ON_ZERO mode
+#
+create table t1(f1 int);
+insert into t1 values(1),(null);
+create table t2(f2 int auto_increment primary key);
+disable_query_log;
+eval select * into outfile '$MYSQLTEST_VARDIR/tmp/t1' from t1;
+SET @OLD_SQL_MODE=@@SQL_MODE, @@SQL_MODE=NO_AUTO_VALUE_ON_ZERO;
+eval load data infile '$MYSQLTEST_VARDIR/tmp/t1' into table t2;
+enable_query_log;
+select * from t2;
+--exec rm $MYSQLTEST_VARDIR/tmp/t1
+SET @@SQL_MODE=@OLD_SQL_MODE;
+drop table t1,t2;
 # End of 5.0 tests

sql/sql_load.cc

@@ -532,7 +532,7 @@ read_fixed_length(THD *thd, COPY_INFO &info, TABLE_LIST *table_list,
   Item_field *sql_field;
   TABLE *table= table_list->table;
   ulonglong id;
-  bool no_trans_update;
+  bool no_trans_update, err;
   DBUG_ENTER("read_fixed_length");
 
   id= 0;
@@ -624,7 +624,9 @@ read_fixed_length(THD *thd, COPY_INFO &info, TABLE_LIST *table_list,
       DBUG_RETURN(-1);
     }
 
-    if (write_record(thd, table, &info))
+    err= write_record(thd, table, &info);
+    table->auto_increment_field_not_null= FALSE;
+    if (err)
       DBUG_RETURN(1);
     thd->no_trans_update= no_trans_update;
    
@@ -669,7 +671,7 @@ read_sep_field(THD *thd, COPY_INFO &info, TABLE_LIST *table_list,
   TABLE *table= table_list->table;
   uint enclosed_length;
   ulonglong id;
-  bool no_trans_update;
+  bool no_trans_update, err;
   DBUG_ENTER("read_sep_field");
 
   enclosed_length=enclosed.length();
@@ -716,8 +718,6 @@ read_sep_field(THD *thd, COPY_INFO &info, TABLE_LIST *table_list,
             DBUG_RETURN(1);
           }
           field->set_null();
-          if (field == table->next_number_field)
-            table->auto_increment_field_not_null= TRUE;
           if (!field->maybe_null())
           {
             if (field->type() == FIELD_TYPE_TIMESTAMP)
@@ -803,8 +803,9 @@ read_sep_field(THD *thd, COPY_INFO &info, TABLE_LIST *table_list,
       DBUG_RETURN(-1);
     }
 
-
-    if (write_record(thd, table, &info))
+    err= write_record(thd, table, &info);
+    table->auto_increment_field_not_null= FALSE;
+    if (err)
       DBUG_RETURN(1);
     /*
       If auto_increment values are used, save the first one for