diff options
Diffstat (limited to 'mysql-test/main')
| -rw-r--r-- | mysql-test/main/join_cache_cardinality.result | 105 | ||||
| -rw-r--r-- | mysql-test/main/join_cache_cardinality.test | 41 | ||||
| -rw-r--r-- | mysql-test/main/mysqld--help.result | 3 | ||||
| -rw-r--r-- | mysql-test/main/mysqltest_tracking_info.result | 2 |
4 files changed, 149 insertions, 2 deletions
diff --git a/mysql-test/main/join_cache_cardinality.result b/mysql-test/main/join_cache_cardinality.result new file mode 100644 index 00000000000..0a76080e601 --- /dev/null +++ b/mysql-test/main/join_cache_cardinality.result @@ -0,0 +1,105 @@ +create table t1 (a int, b int, c int); +insert into t1 select seq,seq/2, seq/4 from seq_1_to_100; +create table t2 (a int, b int, c int); +insert into t2 select seq, seq/2, seq/4 from seq_1_to_200; +analyze table t1,t2 persistent for all; +Table Op Msg_type Msg_text +test.t1 analyze status Engine-independent statistics collected +test.t1 analyze status OK +test.t2 analyze status Engine-independent statistics collected +test.t2 analyze status OK +set optimizer_trace=1; +set join_cache_level=6; +set optimizer_switch='hash_join_cardinality=on'; +explain select * +from t1, t2 +where t1.a=t2.a and t1.a=t2.b and t1.c=t2.c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 100 Using where +1 SIMPLE t2 hash_ALL NULL #hash#$hj 15 test.t1.a,test.t1.a,test.t1.c 200 Using where; Using join buffer (flat, BNLH join) +set @json= (select trace from information_schema.optimizer_trace); +select json_detailed(json_extract(@json, '$**.hash_join_cardinality')) as JS; +JS +[ + { + "hash_join_columns": + [ + { + "field": "a", + "avg_frequency": 1 + }, + { + "field": "b", + "avg_frequency": 2 + }, + { + "field": "c", + "avg_frequency": 3.9216 + } + ], + "rows": 1 + } +] +select json_detailed(json_extract(@json, '$**.rest_of_plan[*].rows_for_plan')) +as ROWS_FOR_PLAN; +ROWS_FOR_PLAN +[100] +explain select * +from t1, t2 where t1.c=t2.c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 100 Using where +1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.c 200 Using where; Using join buffer (flat, BNLH join) +set @json= (select trace from information_schema.optimizer_trace); +select json_detailed(json_extract(@json, '$**.hash_join_cardinality')) as JS; +JS +[ + { + "hash_join_columns": + [ + { + "field": "c", + "avg_frequency": 3.9216 + } + ], + "rows": 3.9216 + } +] +select json_detailed(json_extract(@json, '$**.rest_of_plan[*].rows_for_plan')) +as ROWS_FOR_PLAN; +ROWS_FOR_PLAN +[392.16] +explain select * +from t1 straight_join t2 where t1.c=t2.c and t2.a<30; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 100 Using where +1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.c 200 Using where; Using join buffer (flat, BNLH join) +set @json= (select trace from information_schema.optimizer_trace); +# Note that rows is the same: +select json_detailed(json_extract(@json, '$**.hash_join_cardinality')) as JS; +JS +[ + { + "hash_join_columns": + [ + { + "field": "c", + "avg_frequency": 3.9216 + } + ], + "rows": 3.9216 + } +] +# Despite available selectivity: +select json_detailed(json_extract(@json, '$**.selectivity_for_columns')) as JS; +JS +[ + [ + { + "column_name": "a", + "ranges": + ["NULL < a < 30"], + "selectivity_from_histogram": 0.1484375 + } + ] +] +drop table t1,t2; diff --git a/mysql-test/main/join_cache_cardinality.test b/mysql-test/main/join_cache_cardinality.test new file mode 100644 index 00000000000..b178810b807 --- /dev/null +++ b/mysql-test/main/join_cache_cardinality.test @@ -0,0 +1,41 @@ +--source include/have_sequence.inc + +# Embedded doesn't have optimizer trace: +--source include/not_embedded.inc + +create table t1 (a int, b int, c int); +insert into t1 select seq,seq/2, seq/4 from seq_1_to_100; + +create table t2 (a int, b int, c int); +insert into t2 select seq, seq/2, seq/4 from seq_1_to_200; + +analyze table t1,t2 persistent for all; + +set optimizer_trace=1; +set join_cache_level=6; +set optimizer_switch='hash_join_cardinality=on'; +explain select * +from t1, t2 +where t1.a=t2.a and t1.a=t2.b and t1.c=t2.c; + +set @json= (select trace from information_schema.optimizer_trace); +select json_detailed(json_extract(@json, '$**.hash_join_cardinality')) as JS; +select json_detailed(json_extract(@json, '$**.rest_of_plan[*].rows_for_plan')) +as ROWS_FOR_PLAN; + +explain select * +from t1, t2 where t1.c=t2.c; +set @json= (select trace from information_schema.optimizer_trace); +select json_detailed(json_extract(@json, '$**.hash_join_cardinality')) as JS; +select json_detailed(json_extract(@json, '$**.rest_of_plan[*].rows_for_plan')) +as ROWS_FOR_PLAN; + +explain select * +from t1 straight_join t2 where t1.c=t2.c and t2.a<30; +set @json= (select trace from information_schema.optimizer_trace); +--echo # Note that rows is the same: +select json_detailed(json_extract(@json, '$**.hash_join_cardinality')) as JS; + +--echo # Despite available selectivity: +select json_detailed(json_extract(@json, '$**.selectivity_for_columns')) as JS; +drop table t1,t2; diff --git a/mysql-test/main/mysqld--help.result b/mysql-test/main/mysqld--help.result index 9d3cbae2c84..5c1a8840fa5 100644 --- a/mysql-test/main/mysqld--help.result +++ b/mysql-test/main/mysqld--help.result @@ -734,7 +734,8 @@ 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 diff --git a/mysql-test/main/mysqltest_tracking_info.result b/mysql-test/main/mysqltest_tracking_info.result index 61bb3f2d1e2..791f2a2b4a4 100644 --- a/mysql-test/main/mysqltest_tracking_info.result +++ b/mysql-test/main/mysqltest_tracking_info.result @@ -38,7 +38,7 @@ SET @@session.session_track_system_variables='optimizer_switch'; set optimizer_switch='index_merge=off,index_merge_union=off,index_merge_sort_union=off,index_merge_intersection=off,index_merge_sort_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=on,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=on,mrr_cost_based=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=off,join_cache_hashed=off,join_cache_bka=off,optimize_join_buffer_size=on,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off'; -- Tracker : SESSION_TRACK_SYSTEM_VARIABLES -- optimizer_switch --- index_merge=off,index_merge_union=off,index_merge_sort_union=off,index_merge_intersection=off,index_merge_sort_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=on,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=on,mrr_cost_based=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=off,join_cache_hashed=off,join_cache_bka=off,optimize_join_buffer_size=on,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off +-- index_merge=off,index_merge_union=off,index_merge_sort_union=off,index_merge_intersection=off,index_merge_sort_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=on,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=on,mrr_cost_based=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=off,join_cache_hashed=off,join_cache_bka=off,optimize_join_buffer_size=on,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off,hash_join_cardinality=off Warnings: Warning 1681 'engine_condition_pushdown=on' is deprecated and will be removed in a future release |