mysql-test/r/greedy_optimizer.result:
Adjusted query costs accordingly.
sql/sql_select.cc:
Someone added this 0.001 cost factor to best_extension_by_limited_search(), but forgot to
add it to the old version of the optimizer - find_best().
mysql-test/r/connect.result:
standard values for table type in SHOW TABLES
mysql-test/r/ctype_recoding.result:
standard values for table type in SHOW TABLES
mysql-test/r/drop.result:
standard values for table type in SHOW TABLES
mysql-test/r/greedy_optimizer.result:
fixed results
mysql-test/r/lowercase_table.result:
standard values for table type in SHOW TABLES
mysql-test/r/ps_1general.result:
standard values for table type in SHOW TABLES
mysql-test/r/rename.result:
standard values for table type in SHOW TABLES
mysql-test/r/rpl000009.result:
standard values for table type in SHOW TABLES
mysql-test/r/rpl_error_ignored_table.result:
standard values for table type in SHOW TABLES
mysql-test/r/select.result:
standard values for table type in SHOW TABLES
mysql-test/r/system_mysql_db.result:
standard values for table type in SHOW TABLES
mysql-test/r/view.result:
standard values for table type in SHOW TABLES
sql/sql_show.cc:
standard values for table type in SHOW TABLES
debugging trap
consisting of pos-review fixes and improvements.
mysql-test/r/distinct.result:
Adjusted to account for pre-sorting of tables before optimiziation.
mysql-test/r/func_group.result:
Adjusted to account for pre-sorting of tables before optimiziation.
mysql-test/r/greedy_optimizer.result:
- Adjusted to account for pre-sorting of tables before optimiziation.
- Removed unnecessary test.
- More comments.
mysql-test/r/select.result:
- Adjusted to account for pre-sorting of tables before optimiziation.
mysql-test/t/greedy_optimizer.test:
- Adjusted to account for pre-sorting of tables before optimiziation.
- Removed unnecessary test.
- More comments.
sql/mysql_priv.h:
Moved function print_plan() to sql_test.cc
sql/sql_select.cc:
- Simplified the recursion in best_extension_by_limited_search()
and aligned it with its pseudo-code.
- Renamed functions to better reflect their semantics.
- Post-review changes of function specifications.
- Moved function print_plan() to sql_test.cc.
sql/sql_test.cc:
Moved function print_plan() to sql_test.cc
mysql-test/r/subselect.result:
Table pre-sorting before optimization makes the optimizer select a different plan, this change fixes the plan.
sql/mysql_priv.h:
Added new status variable last_query_cost that contains the cost of the last compiled query.
sql/mysqld.cc:
* Added new system variable 'plan_search_depth' to control the exhaustiveness of the search for an optimal query plan.
* Added new system variable 'heuristic' to control the use of query optimization heuristic.
* Added new status variable 'last_query_cost' that contains the cost of the last compiled query.
sql/set_var.cc:
* Added new system variable 'plan_search_depth' to control the exhaustiveness of the search for an optimal query plan.
* Added new system variable 'heuristic' to control the use of query optimization heuristic.
sql/sql_class.h:
* Added new system variable 'plan_search_depth' to control the exhaustiveness of the search for an optimal query plan.
* Added new system variable 'heuristic' to control the use of query optimization heuristic.
sql/sql_select.cc:
Added a combined greedy/exhaustive query optimization algorithm.
* The greedy search algorithm is implemented in function 'greedy_search'.
* The exhaustive search with controlled search depth is implemented in function 'find_best_limited_depth', a modification of 'find_best'.
* The selection of the best access path and its cost computation is factored out from 'find_best' into function 'best_access_path'.
* In addition:
- added pre-sorting for the query tables before they get optimized
- factored out the optimization of STRAIGHT_JOIN into a separate procedure
sql/sql_select.h:
Added new field to st_position to support the greedy optimizer.
Added a comment to class JOIN.
sql/sql_show.cc:
Added a case to 'mysqld_show' to print double status variables.
sql/structs.h:
Added a new type of status variables SHOW_DOUBLE
BitKeeper/etc/logging_ok:
Logging to logging@openlogging.org accepted
