Commit graph

66 commits

Author SHA1 Message Date
Sergey Petrunya
694ce95557 Semi-join optimizations code cleanup:
- Break down POSITION/advance_sj_state() into four classes 
  representing potential semi-join strategies.

- Treat all strategies uniformly (before, DuplicateWeedout 
  was special as it was the catch-all strategy. Now, we're 
  still relying on it to be the catch-all, but are able to 
  function,e.g. with firstmatch=on,duplicate_weedout=off.

- Update test results (checked)
2011-11-23 04:25:52 +04:00
Igor Babaev
b2e5a3f603 Fixed LP bug #887496.
This bug in the function Loose_scan_opt::check_ref_access_part1 could lead
to choosing an invalid execution plan employing a loose scan access to a
semi-join table even in the cases when such access could not be used at all.
This could result in wrong answers for some queries with IN subqueries.
2011-11-21 09:06:35 -08:00
Sergei Golubchik
76f0b94bb0 merge with 5.3
sql/sql_insert.cc:
  CREATE ... IF NOT EXISTS may do nothing, but
  it is still not a failure. don't forget to my_ok it.
  ******
  CREATE ... IF NOT EXISTS may do nothing, but
  it is still not a failure. don't forget to my_ok it.
sql/sql_table.cc:
  small cleanup
  ******
  small cleanup
2011-10-19 21:45:18 +02:00
Sergey Petrunya
6adddca80e Make semi-joins work with outer joins part #1:
- Make make_outerjoin_info() correctly process semi-join nests
- Make make_join_select() attach conditions to the right places.
2011-06-22 01:57:28 +04:00
Sergei Golubchik
0accbd0364 lots of post-merge changes 2011-04-25 17:22:25 +02:00
Sergey Petrunya
1bf3964fbe MWL#90: Subqueries: Inside-out execution for materialized non-sj subqueries
- Merge into 5.3-main
2010-12-09 18:07:59 +03:00
Michael Widenius
ab5e4eefd5 Fixed some compiler warnings found when compiling for windows.
Changed rows_read and rows_sent status variables to be longlong (to avoid compiler warnings)


sql/item_func.cc:
  Fixed wrong usage of alias
sql/item_subselect.cc:
  Changed buffer size to ulonglong to be able detect buffers bigger than size_t
sql/item_subselect.h:
  Changed buffer size to ulonglong to be able detect buffers bigger than size_t
sql/multi_range_read.cc:
  Fixed compiler warning by using correct type for function argument
sql/mysqld.cc:
  Changed rows_read and rows_sent status variables to be longlong
sql/opt_subselect.h:
  Fixed compiler warning by using correct type for function argument
sql/sql_class.cc:
  Changed rows_read and rows_sent status variables to be longlong
sql/sql_class.h:
  Changed rows_read and rows_sent status variables to be longlong
  Changed max_nulls_in_row to uint as this is number of columns in row.
  This fixed some compiler warnings.
sql/sql_select.cc:
  Added casts to avoid compiler warnings
storage/heap/ha_heap.cc:
  Initilize different types separate
storage/oqgraph/ha_oqgraph.cc:
  Fixed argument to store(longlong) to avoid compiler warnings
2010-11-30 01:27:14 +02:00
Sergei Golubchik
8e7ebfbce8 5.2 merge 2010-10-28 19:04:23 +02:00
psergey
3a9aabaa26 MWL#90: Subqueries: Inside-out execution for materialized non-sj subqueries
- Merge with MariaDB 5.3 -main
2010-07-11 19:18:43 +04:00
psergey
946aef4a58 MWL#90: code cleanup
- Remove deadcode
- Improve comments 
- Do small several small TODOs
2010-07-10 20:51:12 +03:00
Sergey Petrunya
27f9fc063c MariaDB 5.2 -> MariaDB 5.3 merge 2010-06-26 14:05:41 +04:00
Sergey Petrunya
dad93f2c82 MWL#90, code movearound to unify merged and non-merged semi-join materialization processing
- First code, needs cleanup.
2010-06-04 17:40:57 +04:00
Sergey Petrunya
3f595889d3 Subqueries: Inside-out execution for non-semijoin materialized subqueries that are AND-parts of the WHERE
- Code cleanup
- Query plan change is due to s/ha_rows JOIN_TAB::read_time/double JOIN_TAB::read_time/
2010-05-23 23:13:18 +04:00
Sergey Petrunya
b9688830ec Subquery optimizations:
- Better comments
- Use more appropriate return types for functions
- Provide handling where it was missing.
2010-05-10 19:28:19 +04:00
Sergey Petrunya
b2c57cedbf Code cleanup in subquery optimizations 2010-04-25 12:23:52 +04:00
Sergey Petrunya
e0bb2f90a2 Subquery optimization backport:
- Factor out subquery code into sql/opt_subselect.{h,cc}
- Stop using the term "confluent" (was used due to misreading the dictionary)
2010-02-16 00:53:06 +03:00