diff options
Diffstat (limited to 'sql/table.h')
| -rw-r--r-- | sql/table.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sql/table.h b/sql/table.h index 71a199d946e..fad3c4b2b54 100644 --- a/sql/table.h +++ b/sql/table.h @@ -264,11 +264,28 @@ struct st_table { MY_BITMAP *read_set, *write_set; /* Active column sets */ query_id_t query_id; + /* + For each key that has quick_keys.is_set(key) == TRUE: estimate of #records + and max #key parts that range access would use. + */ ha_rows quick_rows[MAX_KEY]; + + /* Bitmaps of key parts that =const for the entire join. */ key_part_map const_key_parts[MAX_KEY]; + uint quick_key_parts[MAX_KEY]; uint quick_n_ranges[MAX_KEY]; + /* + Estimate of number of records that satisfy SARGable part of the table + condition, or table->file->records if no SARGable condition could be + constructed. + This value is used by join optimizer as an estimate of number of records + that will pass the table condition (condition that depends on fields of + this table and constants) + */ + ha_rows quick_condition_rows; + /* If this table has TIMESTAMP field with auto-set property (pointed by timestamp_field member) then this variable indicates during which |