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The pilot patch for mwl#253.

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Igor Babaev
2013-03-11 07:44:24 -07:00
parent 938d47dcdc
commit fc1c8ffdad
25 changed files with 1219 additions and 34 deletions
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13
mysql-test/r/mysqld--help.result
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@ -500,6 +500,18 @@ The following options may be given as the first argument:
partial_match_table_scan, semijoin, semijoin_with_cache,
subquery_cache, table_elimination, extended_keys,
exists_to_in } and val is one of {on, off, default}
--optimizer-use-condition-selectivity=#
Controls selectivity of which conditions the optimizer
takes into account to calculate cardinality of a partial
join when it searches for the best execution plan
Meaning: 1 - use selectivity of index backed range
conditions to calculate cardinality of the partial join
if the last joined table is accessed by full table scan
or an index scan 2 - use selectivity of index backed
range conditions to calculate cardinality of the partial
join in any case 3 - additionally always use selectivity
of range conditions that are not backed by any index to
calculate cardinality of the partial join
--performance-schema
Enable the performance schema.
--performance-schema-events-waits-history-long-size=#
@ -1004,6 +1016,7 @@ old-style-user-limits FALSE
optimizer-prune-level 1
optimizer-search-depth 62
optimizer-switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on
optimizer-use-condition-selectivity 1
performance-schema FALSE
performance-schema-events-waits-history-long-size 10000
performance-schema-events-waits-history-size 10