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| author | Galina Shalygina <galina.shalygina@mariadb.com> | 2019-02-06 23:40:07 +0300 |
|---|---|---|
| committer | Galina Shalygina <galina.shalygina@mariadb.com> | 2019-02-06 23:40:07 +0300 |
| commit | 447e0f023fff0fa2ccfa7e93b77f1da3be3b43f1 (patch) | |
| tree | 1210e525389dfa3e4b2fa00e22fb18bf29a7f016 /sql/sql_explain.h | |
| parent | e299ae5b0786aa9348e422f4271fb344d51f60fa (diff) | |
| download | mariadb-git-447e0f023fff0fa2ccfa7e93b77f1da3be3b43f1.tar.gz | |
MDEV-18144: ANALYZE for statement support for PK filters
ANALYZE and ANALYZE FORMAT=JSON structures are changed in the way that they
show additional information when rowid filter is used:
- r_selectivity_pct - the observed filter selectivity
- r_buffer_size - the size of the rowid filter container buffer
- r_filling_time_ms - how long it took to fill rowid filter container
New class Rowid_filter_tracker was added. This class is needed to collect data
about how rowid filter is executed.
Diffstat (limited to 'sql/sql_explain.h')
| -rw-r--r-- | sql/sql_explain.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sql/sql_explain.h b/sql/sql_explain.h index a161f6c1049..08966b71faa 100644 --- a/sql/sql_explain.h +++ b/sql/sql_explain.h @@ -624,6 +624,9 @@ public: /* Expected selectivity for the filter */ double selectivity; + /* Tracker with the information about how rowid filter is executed */ + Rowid_filter_tracker *tracker; + void print_explain_json(Explain_query *query, Json_writer *writer, bool is_analyze); |