MariaRocks port: temporarily disable gap lock checking

Also provide handler::is_using_full_key

sql/handler.cc

@@ -2704,6 +2704,14 @@ int handler::ha_index_first(uchar * buf)
   return result;
 }
 
+bool handler::is_using_full_key(key_part_map keypart_map,
+                                uint actual_key_parts)
+{
+  return (keypart_map == HA_WHOLE_KEY) ||
+         (keypart_map == ((key_part_map(1) << actual_key_parts)
+                        - 1));
+}
+
 int handler::ha_index_last(uchar * buf)
 {
   int result;

sql/handler.h

@@ -3159,6 +3159,7 @@ public:
                                             size_t size)
   { return 0; }
 
+  bool is_using_full_key(key_part_map keypart_map, uint actual_key_parts);
   virtual int read_range_first(const key_range *start_key,
                                const key_range *end_key,
                                bool eq_range, bool sorted);

storage/rocksdb/ha_rocksdb.cc

@@ -6229,6 +6229,7 @@ int ha_rocksdb::read_range_first(const key_range *start_key,
     result= ha_index_first(table->record[0]);
   else
   {
+#ifdef MARIAROCKS_NOT_YET
     if (is_using_prohibited_gap_locks(table,
                                       is_using_full_unique_key(
                                         active_index,
@@ -6237,6 +6238,7 @@ int ha_rocksdb::read_range_first(const key_range *start_key,
     {
       DBUG_RETURN(HA_ERR_LOCK_DEADLOCK);
     }
+#endif
 
     MYSQL_TABLE_IO_WAIT(m_psi, PSI_TABLE_FETCH_ROW, active_index, 0,
       { result= index_read_map_impl(table->record[0],
@@ -8613,7 +8615,11 @@ THR_LOCK_DATA **ha_rocksdb::store_lock(THD *thd,
       uint sql_command = my_core::thd_sql_command(thd);
       if ((lock_type == TL_READ && in_lock_tables) ||
           (lock_type == TL_READ_HIGH_PRIORITY && in_lock_tables) ||
+#ifdef MARIAROCKS_NOT_YET
           can_hold_read_locks_on_select(thd, lock_type))
+#else
+          false)
+#endif
       {
         ulong tx_isolation = my_core::thd_tx_isolation(thd);
         if (sql_command != SQLCOM_CHECKSUM &&