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| author | Monty <monty@mariadb.org> | 2023-03-13 02:40:24 +0200 |
|---|---|---|
| committer | Monty <monty@mariadb.org> | 2023-05-03 21:44:57 +0300 |
| commit | 3bdc5542dc10693ec7a28add487747f43f580553 (patch) | |
| tree | f6e547f3bae0eb549f60a79d1598c5f2f330189a /mysql-test/main/mysqld--help.result | |
| parent | 8d26537fbf20d249d65d4daba0394a8ff71e540e (diff) | |
| download | mariadb-git-3bdc5542dc10693ec7a28add487747f43f580553.tar.gz | |
MDEV-30812: Improve output cardinality estimates for hash join
Introduces @@optimizer_switch flag: hash_join_cardinality
When this option is on, use EITS statistics to produce tighter bounds
for hash join output cardinality.
This patch is an extension / replacement to a similar patch in 10.6
New features:
- optimizer_switch hash_join_cardinality is on by default
- records_out is set to fanout when HASH is used
- Fixed bug in is_eits_usable: The function did not work with views
Diffstat (limited to 'mysql-test/main/mysqld--help.result')
| -rw-r--r-- | mysql-test/main/mysqld--help.result | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mysql-test/main/mysqld--help.result b/mysql-test/main/mysqld--help.result index 69cd7b5cb35..dbb4fbc262d 100644 --- a/mysql-test/main/mysqld--help.result +++ b/mysql-test/main/mysqld--help.result @@ -799,7 +799,8 @@ The following specify which files/extra groups are read (specified before remain extended_keys, exists_to_in, orderby_uses_equalities, condition_pushdown_for_derived, split_materialized, condition_pushdown_for_subquery, rowid_filter, - condition_pushdown_from_having, not_null_range_scan + condition_pushdown_from_having, not_null_range_scan, + hash_join_cardinality --optimizer-trace=name Controls tracing of the Optimizer: optimizer_trace=option=val[,option=val...], where option @@ -1758,7 +1759,7 @@ optimizer-rowid-copy-cost 0.002653 optimizer-scan-setup-cost 10 optimizer-search-depth 62 optimizer-selectivity-sampling-limit 100 -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=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on +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=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off,hash_join_cardinality=on optimizer-trace optimizer-trace-max-mem-size 1048576 optimizer-use-condition-selectivity 4 |