diff options
Diffstat (limited to 'sql/field.h')
| -rw-r--r-- | sql/field.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sql/field.h b/sql/field.h index dfc02149f9d..c60c5e3bece 100644 --- a/sql/field.h +++ b/sql/field.h @@ -869,6 +869,18 @@ public: */ Column_statistics_collected *collected_stats; + enum stats_availability + { + STATISTICS_CACHED=0, + STATISTICS_FOR_RANGE_PREDICATES_AVAILABLE, + STATISTICS_FOR_NDV_AVAILABLE + }; + + /* + Caches the value of whether statistics are available for a field or not. + */ + uint stats_available; + /* This is additional data provided for any computed(virtual) field, default function or check constraint. @@ -1907,6 +1919,16 @@ public: /* Mark field in read map. Updates also virtual fields */ void register_field_in_read_map(); + bool is_first_component_of_key(KEY *key); + void statistics_available_via_keys(); + void statistics_available_via_stat_tables(); + void is_statistics_available(); + bool is_statistics_available_for_range_predicates(); + bool is_ndv_available(); + bool is_ndv_available_via_stat_tables(); + bool is_ndv_available_via_keys(); + bool is_eits_usable(); + virtual Compression_method *compression_method() const { return 0; } virtual Virtual_tmp_table **virtual_tmp_table_addr() |