addresses #977

temporary change to test if just doing a memcpy will work for unpacking
a Field_new_decimal
real change is to modify Field_new_decimal, but by checking this in, we can
quickly get regression results

git-svn-id: file:///svn/mysql/tokudb-engine/src@4904 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -1483,10 +1483,16 @@ void ha_tokudb::unpack_key(uchar * record, DBT * key, uint index) {
         /* tokutek change to make pack_key and unpack_key work for
            decimals */
         uint unpack_length = key_part->length;
+        //
+        // TEMPORARY HACK
+        // True change is to modify the Field_new_decimal class to properly
+        // implement unpack_key, pack_key, and pack_cmp, part of ticket 977
+        //
         if (key_part->field->type() == MYSQL_TYPE_NEWDECIMAL) {
-            Field_new_decimal *field_nd = (Field_new_decimal *) key_part->field;
-            unpack_length += field_nd->precision << 8;
+            memcpy(record + field_offset(key_part->field), pos, key_part->length);
+            pos += key_part->length;
         }
+        else {
             pos = (uchar *) key_part->field->unpack_key(record + field_offset(key_part->field), pos,
 #if MYSQL_VERSION_ID < 50123
                                                         unpack_length);
@@ -1494,6 +1500,7 @@ void ha_tokudb::unpack_key(uchar * record, DBT * key, uint index) {
                                                         unpack_length, table->s->db_low_byte_first);
 #endif
         }
+    }
 }