diff options
Diffstat (limited to 'storage/sequence/sequence.cc')
| -rw-r--r-- | storage/sequence/sequence.cc | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/storage/sequence/sequence.cc b/storage/sequence/sequence.cc index f5a18094521..eb79d25630c 100644 --- a/storage/sequence/sequence.cc +++ b/storage/sequence/sequence.cc @@ -100,9 +100,7 @@ public: int index_last(uchar *buf); ha_rows records_in_range(uint inx, const key_range *start_key, const key_range *end_key, page_range *pages); - double scan_time() { return (double)nvalues(); } - double read_time(uint index, uint ranges, ha_rows rows) { return (double)rows; } - double keyread_time(uint index, uint ranges, ha_rows rows) { return (double)rows; } + double avg_io_cost() override { return 0.0; } private: void set(uchar *buf); @@ -492,6 +490,13 @@ int ha_seq_group_by_handler::next_row() DBUG_RETURN(0); } +static void sequence_update_optimizer_costs(OPTIMIZER_COSTS *costs) +{ + costs->disk_read_ratio= 0.0; // No disk + costs->key_next_find_cost= costs->key_lookup_cost= + costs->key_copy_cost= costs->row_lookup_cost= + costs->row_copy_cost= 0.0000062391530550; +} /***************************************************************************** Initialize the interface between the sequence engine and MariaDB @@ -518,6 +523,7 @@ static int init(void *p) hton->savepoint_set= hton->savepoint_rollback= hton->savepoint_release= dummy_savepoint; hton->create_group_by= create_group_by_handler; + hton->update_optimizer_costs= sequence_update_optimizer_costs; return 0; } |