diff options
| author | unknown <sergefp@mysql.com> | 2005-09-30 15:21:37 +0400 |
|---|---|---|
| committer | unknown <sergefp@mysql.com> | 2005-09-30 15:21:37 +0400 |
| commit | 1fe423aebaaefdae815662ce555703eb66b3f9e0 (patch) | |
| tree | 00b61167a0a17a8889f39b5ab9892775c48e78db /sql/opt_range.h | |
| parent | 7b8a6e458e6bcd3512b2ac2e88e8e02e7f2b4568 (diff) | |
| download | mariadb-git-1fe423aebaaefdae815662ce555703eb66b3f9e0.tar.gz | |
BUG#12915: Added single-table UPDATE/DELTE ... ORDER BY ... LIMIT
optimization: now can use index to find records to update/delete
when there is no WHERE clause.
mysql-test/r/update.result:
Testcase for BUG#12915
mysql-test/t/update.test:
Testcase for BUG#12915
sql/mysql_priv.h:
BUG#12915: Added init_read_record_idx function.
sql/opt_range.cc:
BUG#12915: Added get_index_for_order() - find an index that can be
used to get first N table records in given ordering cheaper then
one would with full table scan.
sql/opt_range.h:
BUG#12915: Added get_index_for_order() function
sql/records.cc:
BUG#12915: Added init_read_record_idx(), rr_index() that allow to scan
index using init_read_record()/read_record.read_record()
sql/sql_delete.cc:
BUG#12915: Added single-table DELETE ... ORDER BY ... LIMIT optimization:
now can use index to find records to delete when there is no WHERE clause.
sql/sql_update.cc:
BUG#12915: Added single-table UPDATE ... ORDER BY ... LIMIT optimization:
now can use index to find records to update when there is no WHERE clause.
sql/structs.h:
BUG#12915: Added init_read_record_idx(), rr_index() that allow to scan
index using init_read_record()/READ_RECORD::read_record()
Diffstat (limited to 'sql/opt_range.h')
| -rw-r--r-- | sql/opt_range.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sql/opt_range.h b/sql/opt_range.h index 87e0315a09e..15f0bf02b34 100644 --- a/sql/opt_range.h +++ b/sql/opt_range.h @@ -167,4 +167,6 @@ public: QUICK_SELECT *get_quick_select_for_ref(THD *thd, TABLE *table, struct st_table_ref *ref); +uint get_index_for_order(TABLE *table, ORDER *order, ha_rows limit); + #endif |