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This is a full cost-based implementation of the optimization that employs

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splitting technique for equi-joins of materialized derived tables/views/CTEs.
(see mdev-13369 and mdev-13389).
This commit is contained in:
Igor Babaev
2017-12-30 12:29:09 -08:00
parent 7a66e0ab8f
commit 4f0299f8b3
23 changed files with 2511 additions and 600 deletions
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1
libmysqld/CMakeLists.txt
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@ -119,6 +119,7 @@ SET(SQL_EMBEDDED_SOURCES emb_qcache.cc libmysqld.c lib_sql.cc
../sql/session_tracker.cc
../sql/proxy_protocol.cc
../sql/sql_tvc.cc ../sql/sql_tvc.h
../sql/opt_split.cc
${GEN_SOURCES}
${MYSYS_LIBWRAP_SOURCE}
)

1334
mysql-test/r/derived_cond_pushdown.result
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File diff suppressed because it is too large Load Diff

4
mysql-test/r/mysqld--help.result
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@ -665,7 +665,7 @@ The following options may be given as the first argument:
join_cache_hashed, join_cache_bka,
optimize_join_buffer_size, table_elimination,
extended_keys, exists_to_in, orderby_uses_equalities,
condition_pushdown_for_derived, split_grouping_derived
condition_pushdown_for_derived, split_materialized
--optimizer-use-condition-selectivity=#
Controls selectivity of which conditions the optimizer
takes into account to calculate cardinality of a partial
@ -1510,7 +1510,7 @@ old-style-user-limits FALSE
optimizer-prune-level 1
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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
optimizer-use-condition-selectivity 1
performance-schema FALSE
performance-schema-accounts-size -1

4
mysql-test/r/selectivity.result
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@ -141,7 +141,7 @@ order by s_suppkey;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY supplier ALL PRIMARY NULL NULL NULL 10 100.00 Using filesort
1 PRIMARY <derived3> ref key0 key0 5 dbt3_s001.supplier.s_suppkey 10 100.00 Using where
3 LATERAL DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 268 75.00 Using where
3 DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 268 100.00 Using where; Using temporary; Using filesort
2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 268 100.00
4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 268 100.00 Using where; Using temporary; Using filesort
Warnings:
@ -162,7 +162,7 @@ order by s_suppkey;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY supplier ALL PRIMARY NULL NULL NULL 10 100.00 Using filesort
1 PRIMARY <derived3> ref key0 key0 5 dbt3_s001.supplier.s_suppkey 10 100.00 Using where
3 LATERAL DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 268 100.00 Using where
3 DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 268 100.00 Using where; Using temporary; Using filesort
2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 268 100.00
4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 268 100.00 Using where; Using temporary; Using filesort
Warnings:

4
mysql-test/r/selectivity_innodb.result
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@ -144,7 +144,7 @@ order by s_suppkey;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY supplier index PRIMARY PRIMARY 4 NULL 10 100.00
1 PRIMARY <derived3> ref key0 key0 5 dbt3_s001.supplier.s_suppkey 10 100.00 Using where
3 LATERAL DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 229 75.11 Using where
3 DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 229 100.00 Using where; Using temporary; Using filesort
2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 229 100.00
4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 229 100.00 Using where; Using temporary; Using filesort
Warnings:
@ -165,7 +165,7 @@ order by s_suppkey;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY supplier index PRIMARY PRIMARY 4 NULL 10 100.00
1 PRIMARY <derived3> ref key0 key0 5 dbt3_s001.supplier.s_suppkey 10 100.00 Using where
3 LATERAL DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 229 100.00 Using where
3 DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 229 100.00 Using where; Using temporary; Using filesort
2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 228 100.00
4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 229 100.00 Using where; Using temporary; Using filesort
Warnings:

36
mysql-test/suite/sys_vars/r/optimizer_switch_basic.result
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@ -1,63 +1,63 @@
SET @start_global_value = @@global.optimizer_switch;
SELECT @start_global_value;
@start_global_value
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
select @@global.optimizer_switch;
@@global.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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
select @@session.optimizer_switch;
@@session.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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
show global variables like 'optimizer_switch';
Variable_name Value
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
show session variables like 'optimizer_switch';
Variable_name Value
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
select * from information_schema.global_variables where variable_name='optimizer_switch';
VARIABLE_NAME VARIABLE_VALUE
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
select * from information_schema.session_variables where variable_name='optimizer_switch';
VARIABLE_NAME VARIABLE_VALUE
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
set global optimizer_switch=10;
set session optimizer_switch=5;
select @@global.optimizer_switch;
@@global.optimizer_switch
index_merge=off,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
index_merge=off,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
select @@session.optimizer_switch;
@@session.optimizer_switch
index_merge=on,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
index_merge=on,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
set global optimizer_switch="index_merge_sort_union=on";
set session optimizer_switch="index_merge=off";
select @@global.optimizer_switch;
@@global.optimizer_switch
index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
select @@session.optimizer_switch;
@@session.optimizer_switch
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
show global variables like 'optimizer_switch';
Variable_name Value
optimizer_switch index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
optimizer_switch index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
show session variables like 'optimizer_switch';
Variable_name Value
optimizer_switch index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
optimizer_switch index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
select * from information_schema.global_variables where variable_name='optimizer_switch';
VARIABLE_NAME VARIABLE_VALUE
OPTIMIZER_SWITCH index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
OPTIMIZER_SWITCH index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
select * from information_schema.session_variables where variable_name='optimizer_switch';
VARIABLE_NAME VARIABLE_VALUE
OPTIMIZER_SWITCH index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
OPTIMIZER_SWITCH index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
set session optimizer_switch="default";
select @@session.optimizer_switch;
@@session.optimizer_switch
index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_grouping_derived=off
index_merge=off,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=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=off,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,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=off,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off,split_materialized=off
set optimizer_switch = replace(@@optimizer_switch, '=off', '=on');
Warnings:
Warning 1681 'engine_condition_pushdown=on' is deprecated and will be removed in a future release
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=on,engine_condition_pushdown=on,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=on,mrr_cost_based=on,mrr_sort_keys=on,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_grouping_derived=on
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=on,engine_condition_pushdown=on,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=on,mrr_cost_based=on,mrr_sort_keys=on,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
set global optimizer_switch=1.1;
ERROR 42000: Incorrect argument type to variable 'optimizer_switch'
set global optimizer_switch=1e1;
@ -69,4 +69,4 @@ ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'foobar'
SET @@global.optimizer_switch = @start_global_value;
SELECT @@global.optimizer_switch;
@@global.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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on

9
mysql-test/suite/sys_vars/r/sysvars_server_embedded.result
View File

@ -8,6 +8,7 @@ where variable_name not like 'aria%' and
variable_name not like 'debug%' and
variable_name not like 'wsrep%' and
variable_name not in (
'in_predicate_conversion_threshold',
'have_openssl',
'have_symlink',
'hostname',
@ -2672,17 +2673,17 @@ ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME OPTIMIZER_SWITCH
SESSION_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
GLOBAL_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
SESSION_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
GLOBAL_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
DEFAULT_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
VARIABLE_SCOPE SESSION
VARIABLE_TYPE FLAGSET
VARIABLE_COMMENT Fine-tune the optimizer behavior
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST index_merge,index_merge_union,index_merge_sort_union,index_merge_intersection,index_merge_sort_intersection,engine_condition_pushdown,index_condition_pushdown,derived_merge,derived_with_keys,firstmatch,loosescan,materialization,in_to_exists,semijoin,partial_match_rowid_merge,partial_match_table_scan,subquery_cache,mrr,mrr_cost_based,mrr_sort_keys,outer_join_with_cache,semijoin_with_cache,join_cache_incremental,join_cache_hashed,join_cache_bka,optimize_join_buffer_size,table_elimination,extended_keys,exists_to_in,orderby_uses_equalities,condition_pushdown_for_derived,split_grouping_derived,default
ENUM_VALUE_LIST index_merge,index_merge_union,index_merge_sort_union,index_merge_intersection,index_merge_sort_intersection,engine_condition_pushdown,index_condition_pushdown,derived_merge,derived_with_keys,firstmatch,loosescan,materialization,in_to_exists,semijoin,partial_match_rowid_merge,partial_match_table_scan,subquery_cache,mrr,mrr_cost_based,mrr_sort_keys,outer_join_with_cache,semijoin_with_cache,join_cache_incremental,join_cache_hashed,join_cache_bka,optimize_join_buffer_size,table_elimination,extended_keys,exists_to_in,orderby_uses_equalities,condition_pushdown_for_derived,split_materialized,default
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME OPTIMIZER_USE_CONDITION_SELECTIVITY

8
mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result
View File

@ -2883,17 +2883,17 @@ ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME OPTIMIZER_SWITCH
SESSION_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
GLOBAL_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
SESSION_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
GLOBAL_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
DEFAULT_VALUE 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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
VARIABLE_SCOPE SESSION
VARIABLE_TYPE FLAGSET
VARIABLE_COMMENT Fine-tune the optimizer behavior
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST index_merge,index_merge_union,index_merge_sort_union,index_merge_intersection,index_merge_sort_intersection,engine_condition_pushdown,index_condition_pushdown,derived_merge,derived_with_keys,firstmatch,loosescan,materialization,in_to_exists,semijoin,partial_match_rowid_merge,partial_match_table_scan,subquery_cache,mrr,mrr_cost_based,mrr_sort_keys,outer_join_with_cache,semijoin_with_cache,join_cache_incremental,join_cache_hashed,join_cache_bka,optimize_join_buffer_size,table_elimination,extended_keys,exists_to_in,orderby_uses_equalities,condition_pushdown_for_derived,split_grouping_derived,default
ENUM_VALUE_LIST index_merge,index_merge_union,index_merge_sort_union,index_merge_intersection,index_merge_sort_intersection,engine_condition_pushdown,index_condition_pushdown,derived_merge,derived_with_keys,firstmatch,loosescan,materialization,in_to_exists,semijoin,partial_match_rowid_merge,partial_match_table_scan,subquery_cache,mrr,mrr_cost_based,mrr_sort_keys,outer_join_with_cache,semijoin_with_cache,join_cache_incremental,join_cache_hashed,join_cache_bka,optimize_join_buffer_size,table_elimination,extended_keys,exists_to_in,orderby_uses_equalities,condition_pushdown_for_derived,split_materialized,default
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME OPTIMIZER_USE_CONDITION_SELECTIVITY

159
mysql-test/t/derived_cond_pushdown.test
View File

@ -2145,7 +2145,7 @@ drop table t1;
--echo #
set @save_optimizer_switch= @@optimizer_switch;
set optimizer_switch='split_grouping_derived=off';
set optimizer_switch='split_materialized=off';
create table t1 (a int, c varchar(16));
insert into t1 values
@ -2256,28 +2256,62 @@ set optimizer_switch= @save_optimizer_switch;
--echo #
let
$no_splitting= set statement optimizer_switch='split_grouping_derived=off' for;
$no_splitting= set statement optimizer_switch='split_materialized=off' for;
create table t1 (a int);
create table t1 (a int, b int, index idx_b(b)) engine=myisam;
insert into t1 values
(8), (5), (1), (2), (9), (7), (2), (7);
(8,3), (5,7), (1,2), (2,1), (9,7), (7,5), (2,2), (7,3),
(9,3), (8,1), (4,5), (2,3);
create table t2 (a int, b int, index idx(a));
create table t2 (a int, b int, c char(127), index idx_a(a)) engine=myisam;
insert into t2 values
(7,10), (1,20), (2,23), (7,18), (1,30),
(4,71), (3,15), (7,82), (8,12), (4,15),
(11,33), (10,42), (4,53), (10,17), (2,90);
(7,10,'x'), (1,20,'a'), (2,23,'b'), (7,18,'z'), (1,30,'c'),
(4,71,'d'), (3,15,'x'), (7,82,'y'), (8,12,'t'), (4,15,'b'),
(11,33,'a'), (10,42,'u'), (4,53,'p'), (10,17,'r'), (2,90,'x'),
(17,10,'s'), (11,20,'v'), (12,23,'y'), (17,18,'a'), (11,30,'d'),
(24,71,'h'), (23,15,'i'), (27,82,'k'), (28,12,'p'), (24,15,'q'),
(31,33,'f'), (30,42,'h'), (40,53,'m'), (30,17,'o'), (21,90,'b'),
(37,10,'e'), (31,20,'g'), (32,23,'f'), (37,18,'n'), (41,30,'l'),
(54,71,'j'), (53,15,'w'), (57,82,'z'), (58,12,'k'), (54,15,'p'),
(61,33,'c'), (60,42,'a'), (62,53,'x'), (67,17,'g'), (64,90,'v');
insert into t2 select a+10, b+10, concat(c,'f') from t2;
analyze table t1,t2;
let $q1=
select t1.a,t.max,t.min
select t1.a,t.s,t.m
from t1 join
(select a, max(t2.b) max, min(t2.b) min from t2 group by t2.a) t
on t1.a=t.a;
(select a, sum(t2.b) as s, min(t2.c) as m from t2 group by t2.a) t
on t1.a=t.a
where t1.b < 3;
eval $no_splitting $q1;
eval $q1;
eval explain extended $q1;
eval explain format=json $q1;
eval prepare stmt from "$q1";
execute stmt;
execute stmt;
deallocate prepare stmt;
let $q10=
select t1.a,t.s,t.m
from t1 join
(select a, sum(t2.b) as s, min(t2.b) as m from t2 group by t2.a) t
on t1.a=t.a
where t1.b <= 5;
eval $no_splitting $q10;
eval $q10;
eval explain extended $q10;
eval explain format=json $q10;
eval prepare stmt from "$q10";
execute stmt;
execute stmt;
deallocate prepare stmt;
delete from t1 where t1.b between 2 and 5;
let $q2=
select t1.a,t.max,t.min
@ -2290,68 +2324,122 @@ eval $q2;
eval explain extended $q2;
eval explain format=json $q2;
create table t3 (a int, c varchar(16));
create table t3 (a int, b int, c char(127), index idx_b(b)) engine=myisam;
insert into t3 values
(8,'aa'), (5,'cc'), (1,'bb'), (2,'aa'), (9,'cc'),
(7,'aa'), (2,'aa'), (7,'bb');
(8,11,'aa'), (5,15,'cc'), (1,14,'bb'), (2,12,'aa'), (7,17,'cc'),
(7,18,'aa'), (2,11,'aa'), (7,10,'bb'), (3,11,'dd'), (4,12,'ee'),
(5,14,'dd'), (9,12,'ee');
create table t4 (a int, b int, c varchar(16), index idx(a,c));
create table t4 (a int, b int, c char(127), index idx(a,c)) engine=myisam;
insert into t4 values
(7,10,'cc'), (1,20,'aa'), (2,23,'bb'), (7,18,'cc'), (1,30,'bb'),
(4,71,'xx'), (3,15,'aa'), (7,82,'bb'), (8,12,'dd'), (4,15,'aa'),
(11,33,'yy'), (10,42,'zz'), (4,53,'xx'), (10,17,'yy'), (7,12,'bb'),
(4,71,'xx'), (3,15,'aa'), (7,82,'aa'), (8,12,'dd'), (4,15,'aa'),
(11,33,'yy'), (10,42,'zz'), (4,53,'xx'), (10,17,'yy'), (7,12,'cc'),
(8,20,'dd'), (7,32,'bb'), (1,50,'aa'), (3,40,'bb'), (3,77,'aa');
insert into t4 select a+10, b+10, concat(c,'f') from t4;
analyze table t3,t4;
let $q3=
select t3.a,t3.c,t.max,t.min
from t3 join
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
on t3.a=t.a and t3.c=t.c;
on t3.a=t.a and t3.c=t.c
where t3.b > 15;
eval $no_splitting $q3;
eval $q3;
eval explain extended $q3;
eval explain format=json $q3;
let $q30=
select t3.a,t3.c,t.max,t.min
from t3 join
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
on t3.a=t.a and t3.c=t.c
where t3.b <= 15;
eval $no_splitting $q30;
eval $q30;
eval explain extended $q30;
eval explain format=json $q30;
let $q4=
select t3.a,t3.c,t.max,t.min
from t3 join
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
on t3.a=t.a and t3.c=t.c;
on t3.a=t.a and t3.c=t.c
where t3.b > 15;
eval $no_splitting $q4;
eval $q4;
eval explain extended $q4;
eval explain format=json $q4;
drop index idx on t2;
create index idx on t2(b);
create index idx on t3(a);
create index idx2 on t4(c);
insert into t3 select a+1, concat(c,'f') from t3;
insert into t3 select a+1, concat(c,'h') from t3;
insert into t4 select a+1, b+10, concat(c,'h') from t4;
let $q40=
select t3.a,t3.c,t.max,t.min
from t3 join
(select a, c, max(b) max, min(b) min from t4 group by c,a) t
on t3.a=t.a and t3.c=t.c
where t3.b <= 15;
eval $no_splitting $q40;
eval $q40;
eval explain extended $q40;
eval explain format=json $q40;
drop index idx_a on t2;
create index idx on t2(c,b);
create index idx_a on t3(a);
create index idx_c on t4(c);
insert into t3 select a+10, b+10, concat(c,'f') from t3;
insert into t3 select a+100, b+100, concat(c,'g') from t3;
insert into t4 select a+100, b+100, concat(c,'g') from t4;
insert into t4 select a+1000, b+1000, concat(c,'h') from t4;
analyze table t2,t3,t4;
let $q5=
select t2.a,t2.b,t3.c,t.max,t.min
select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
where t2.b > 50 and t2.a=t3.a and t3.c=t.c;
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
eval $no_splitting $q5;
eval $q5;
eval explain extended $q5;
eval explain format=json $q5;
let $q50=
select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
eval $no_splitting $q50;
eval $q50;
eval explain extended $q50;
eval explain format=json $q50;
let $q6=
select *
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
where t2.b > 50 and t2.a=t3.a and t3.c=t.c;
where t2.b between 80 and 85 and t2.c in ('y','z') and t2.a=t3.a and t3.c=t.c;
eval $no_splitting $q6;
eval $q6;
eval explain extended $q6;
eval explain format=json $q6;
let $q60=
select *
from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
eval $no_splitting $q60;
eval $q60;
eval explain extended $q60;
eval explain format=json $q60;
drop table t1,t2,t3,t4;
--echo #
@ -2365,18 +2453,23 @@ INSERT INTO t1 VALUES (1),(9),(3);
CREATE TABLE t2 (a int, i int);
INSERT INTO t2 VALUES (1,9),(2,3),(3,7),(4,1);
CREATE TABLE t3 (a int, c varchar(8), index(c));
CREATE TABLE t3 (a int, c char(127), index(c));
INSERT INTO t3 VALUES (1,'foo'),(3,'bar'),(4,'foo'),(2,'bar');
INSERT INTO t3 SELECT a, concat(c,'a') FROM t3;
CREATE TABLE t4 (c varchar(8));
INSERT INTO t4 VALUES ('abc'),('foo'),('def');
CREATE TABLE t4 (a int, c char(127), index(a));
INSERT INTO t4 VALUES
(3,'abc'),(1,'foo'),(4,'def'),(8,'xxx'),(3,'yyy'),
(5,'zzz'),(9,'xyz'),(2,'yxz'),(5,'zxy'),(7,'zyx') ;
ANALYZE TABLE t1,t2,t3,t4;
CREATE VIEW v1 AS
SELECT c FROM t3
WHERE a IN ( SELECT t2.a FROM t1 JOIN t2 WHERE t1.i = t2.i ) GROUP BY c ;
let $q1=
SELECT * FROM t4 WHERE c IN ( SELECT c FROM v1 );
SELECT * FROM t4 WHERE c IN ( SELECT c FROM v1 ) and a < 2;
eval $no_splitting $q1;
eval $q1;

1
sql/CMakeLists.txt
View File

@ -145,6 +145,7 @@ SET (SQL_SOURCE
sql_cte.cc
sql_sequence.cc sql_sequence.h ha_sequence.h
sql_tvc.cc sql_tvc.h
opt_split.cc
${WSREP_SOURCES}
table_cache.cc encryption.cc temporary_tables.cc
proxy_protocol.cc

1132
sql/opt_split.cc Normal file
View File

File diff suppressed because it is too large Load Diff

8
sql/opt_subselect.cc
View File

@ -446,10 +446,6 @@ static bool convert_subq_to_jtbm(JOIN *parent_join,
Item_in_subselect *subq_pred, bool *remove);
static TABLE_LIST *alloc_join_nest(THD *thd);
static uint get_tmp_table_rec_length(Ref_ptr_array p_list, uint elements);
static double get_tmp_table_lookup_cost(THD *thd, double row_count,
uint row_size);
static double get_tmp_table_write_cost(THD *thd, double row_count,
uint row_size);
bool find_eq_ref_candidate(TABLE *table, table_map sj_inner_tables);
static SJ_MATERIALIZATION_INFO *
at_sjmat_pos(const JOIN *join, table_map remaining_tables, const JOIN_TAB *tab,
@ -2468,7 +2464,7 @@ static uint get_tmp_table_rec_length(Ref_ptr_array p_items, uint elements)
@return the cost of one lookup
*/
static double
double
get_tmp_table_lookup_cost(THD *thd, double row_count, uint row_size)
{
if (row_count * row_size > thd->variables.max_heap_table_size)
@ -2488,7 +2484,7 @@ get_tmp_table_lookup_cost(THD *thd, double row_count, uint row_size)
@return the cost of writing one row
*/
static double
double
get_tmp_table_write_cost(THD *thd, double row_count, uint row_size)
{
double lookup_cost= get_tmp_table_lookup_cost(thd, row_count, row_size);

2
sql/sql_class.h
View File

@ -5507,8 +5507,6 @@ public:
};
/*
Optimizer and executor structure for the materialized semi-join info. This
structure contains

1
sql/sql_const.h
View File

@ -231,6 +231,7 @@
*/
#define HEAP_TEMPTABLE_LOOKUP_COST 0.05
#define DISK_TEMPTABLE_LOOKUP_COST 1.0
#define SORT_INDEX_CMP_COST 0.02
#define MY_CHARSET_BIN_MB_MAXLEN 1

4
sql/sql_priv.h
View File

@ -227,7 +227,7 @@
#define OPTIMIZER_SWITCH_EXISTS_TO_IN (1ULL << 28)
#define OPTIMIZER_SWITCH_ORDERBY_EQ_PROP (1ULL << 29)
#define OPTIMIZER_SWITCH_COND_PUSHDOWN_FOR_DERIVED (1ULL << 30)
#define OPTIMIZER_SWITCH_SPLIT_GROUPING_DERIVED (1ULL << 31)
#define OPTIMIZER_SWITCH_SPLIT_MATERIALIZED (1ULL << 31)
#define OPTIMIZER_SWITCH_DEFAULT (OPTIMIZER_SWITCH_INDEX_MERGE | \
OPTIMIZER_SWITCH_INDEX_MERGE_UNION | \
@ -254,7 +254,7 @@
OPTIMIZER_SWITCH_EXISTS_TO_IN | \
OPTIMIZER_SWITCH_ORDERBY_EQ_PROP | \
OPTIMIZER_SWITCH_COND_PUSHDOWN_FOR_DERIVED | \
OPTIMIZER_SWITCH_SPLIT_GROUPING_DERIVED)
OPTIMIZER_SWITCH_SPLIT_MATERIALIZED)
/*
Replication uses 8 bytes to store SQL_MODE in the binary log. The day you

288
sql/sql_select.cc
View File

@ -85,7 +85,6 @@ LEX_CSTRING distinct_key= {STRING_WITH_LEN("distinct_key")};
struct st_sargable_param;
static void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array);
static bool make_join_statistics(JOIN *join, List<TABLE_LIST> &leaves,
DYNAMIC_ARRAY *keyuse);
static bool update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,
@ -93,8 +92,6 @@ static bool update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,
uint tables, COND *conds,
table_map table_map, SELECT_LEX *select_lex,
SARGABLE_PARAM **sargables);
static bool sort_and_filter_keyuse(THD *thd, DYNAMIC_ARRAY *keyuse,
bool skip_unprefixed_keyparts);
static int sort_keyuse(KEYUSE *a,KEYUSE *b);
static bool are_tables_local(JOIN_TAB *jtab, table_map used_tables);
static bool create_ref_for_key(JOIN *join, JOIN_TAB *j, KEYUSE *org_keyuse,
@ -1125,7 +1122,6 @@ int JOIN::optimize()
if (optimization_state != JOIN::NOT_OPTIMIZED)
return FALSE;
optimization_state= JOIN::OPTIMIZATION_IN_PROGRESS;
is_for_splittable_grouping_derived= false;
res= optimize_inner();
}
if (!with_two_phase_optimization ||
@ -1571,9 +1567,6 @@ int JOIN::optimize_stage2()
if (subq_exit_fl)
goto setup_subq_exit;
if (select_lex->handle_derived(thd->lex, DT_OPTIMIZE))
DBUG_RETURN(1);
if (thd->check_killed())
DBUG_RETURN(1);
@ -1581,6 +1574,9 @@ int JOIN::optimize_stage2()
if (get_best_combination())
DBUG_RETURN(1);
if (select_lex->handle_derived(thd->lex, DT_OPTIMIZE))
DBUG_RETURN(1);
if (optimizer_flag(thd, OPTIMIZER_SWITCH_DERIVED_WITH_KEYS))
drop_unused_derived_keys();
@ -3671,6 +3667,10 @@ JOIN::destroy()
cleanup_item_list(tmp_all_fields3);
destroy_sj_tmp_tables(this);
delete_dynamic(&keyuse);
if (save_qep)
delete(save_qep);
if (ext_keyuses_for_splitting)
delete(ext_keyuses_for_splitting);
delete procedure;
DBUG_RETURN(error);
}
@ -4124,6 +4124,12 @@ make_join_statistics(JOIN *join, List<TABLE_LIST> &tables_list,
DBUG_EXECUTE("opt", print_keyuse_array(keyuse_array););
}
for (s= stat; s < stat_end; s++)
{
if (s->table->is_splittable())
s->add_keyuses_for_splitting();
}
join->const_table_map= no_rows_const_tables;
join->const_tables= const_count;
eliminate_tables(join);
@ -4597,9 +4603,6 @@ make_join_statistics(JOIN *join, List<TABLE_LIST> &tables_list,
if (join->choose_subquery_plan(all_table_map & ~join->const_table_map))
goto error;
if (join->improve_chosen_plan(join->thd))
goto error;
DEBUG_SYNC(join->thd, "inside_make_join_statistics");
DBUG_RETURN(0);
@ -4629,23 +4632,6 @@ error:
keyuse Pointer to possible keys
*****************************************************************************/
/// Used when finding key fields
struct KEY_FIELD {
Field *field;
Item_bool_func *cond;
Item *val; ///< May be empty if diff constant
uint level;
uint optimize;
bool eq_func;
/**
If true, the condition this struct represents will not be satisfied
when val IS NULL.
*/
bool null_rejecting;
bool *cond_guard; /* See KEYUSE::cond_guard */
uint sj_pred_no; /* See KEYUSE::sj_pred_no */
};
/**
Merge new key definitions to old ones, remove those not used in both.
@ -5296,7 +5282,7 @@ Item_func_ne::add_key_fields(JOIN *join, KEY_FIELD **key_fields,
/*
QQ: perhaps test for !is_local_field(args[1]) is not really needed here.
Other comparison functions, e.g. Item_func_le, Item_func_gt, etc,
do not have this test. See Item_bool_func2::add_key_field_optimize_op().
do not have this test. See Item_bool_func2::add_key_fieldoptimize_op().
Check with the optimizer team.
*/
if (is_local_field(args[0]) && !is_local_field(args[1]))
@ -5479,6 +5465,7 @@ add_keyuse(DYNAMIC_ARRAY *keyuse_array, KEY_FIELD *key_field,
keyuse.null_rejecting= key_field->null_rejecting;
keyuse.cond_guard= key_field->cond_guard;
keyuse.sj_pred_no= key_field->sj_pred_no;
keyuse.validity_ref= 0;
return (insert_dynamic(keyuse_array,(uchar*) &keyuse));
}
@ -5525,6 +5512,8 @@ add_key_part(DYNAMIC_ARRAY *keyuse_array, KEY_FIELD *key_field)
{
if (!field->can_optimize_hash_join(key_field->cond, key_field->val))
return false;
if (form->is_splittable())
form->add_splitting_info_for_key_field(key_field);
/*
If a key use is extracted from an equi-join predicate then it is
added not only as a key use for every index whose component can
@ -5538,7 +5527,6 @@ add_key_part(DYNAMIC_ARRAY *keyuse_array, KEY_FIELD *key_field)
return FALSE;
}
static bool
add_ft_keys(DYNAMIC_ARRAY *keyuse_array,
JOIN_TAB *stat,COND *cond,table_map usable_tables)
@ -5600,6 +5588,7 @@ add_ft_keys(DYNAMIC_ARRAY *keyuse_array,
keyuse.optimize= 0;
keyuse.keypart_map= 0;
keyuse.sj_pred_no= UINT_MAX;
keyuse.validity_ref= 0;
return insert_dynamic(keyuse_array,(uchar*) &keyuse);
}
@ -5887,7 +5876,7 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab,
Special treatment for ft-keys.
*/
static bool sort_and_filter_keyuse(THD *thd, DYNAMIC_ARRAY *keyuse,
bool sort_and_filter_keyuse(THD *thd, DYNAMIC_ARRAY *keyuse,
bool skip_unprefixed_keyparts)
{
KEYUSE key_end, *prev, *save_pos, *use;
@ -5956,7 +5945,7 @@ static bool sort_and_filter_keyuse(THD *thd, DYNAMIC_ARRAY *keyuse,
Update some values in keyuse for faster choose_plan() loop.
*/
static void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array)
void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array)
{
KEYUSE *end,*keyuse= dynamic_element(keyuse_array, 0, KEYUSE*);
@ -5997,7 +5986,6 @@ static void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array)
}
/**
Check for the presence of AGGFN(DISTINCT a) queries that may be subject
to loose index scan.
@ -6305,6 +6293,7 @@ best_access_path(JOIN *join,
bool best_uses_jbuf= FALSE;
MY_BITMAP *eq_join_set= &s->table->eq_join_set;
KEYUSE *hj_start_key= 0;
SplM_plan_info *spl_plan= 0;
disable_jbuf= disable_jbuf || idx == join->const_tables;
@ -6315,6 +6304,9 @@ best_access_path(JOIN *join,
loose_scan_opt.init(join, s, remaining_tables);
if (s->table->is_splittable())
spl_plan= s->choose_best_splitting(record_count, remaining_tables);
if (s->keyuse)
{ /* Use key if possible */
KEYUSE *keyuse;
@ -6379,6 +6371,7 @@ best_access_path(JOIN *join,
2. we won't get two ref-or-null's
*/
if (!(remaining_tables & keyuse->used_tables) &&
(!keyuse->validity_ref || *keyuse->validity_ref) &&
s->access_from_tables_is_allowed(keyuse->used_tables,
join->sjm_lookup_tables) &&
!(ref_or_null_part && (keyuse->optimize &
@ -6691,6 +6684,7 @@ best_access_path(JOIN *join,
tmp += s->startup_cost;
loose_scan_opt.check_ref_access_part2(key, start_key, records, tmp);
} /* not ft_key */
if (tmp + 0.0001 < best_time - records/(double) TIME_FOR_COMPARE)
{
best_time= tmp + records/(double) TIME_FOR_COMPARE;
@ -6878,6 +6872,7 @@ best_access_path(JOIN *join,
pos->ref_depend_map= best_ref_depends_map;
pos->loosescan_picker.loosescan_key= MAX_KEY;
pos->use_join_buffer= best_uses_jbuf;
pos->spl_plan= spl_plan;
loose_scan_opt.save_to_position(s, loose_scan_pos);
@ -8932,192 +8927,15 @@ JOIN_TAB *next_depth_first_tab(JOIN* join, JOIN_TAB* tab)
return tab;
}
static
bool key_can_be_used_to_split_by_fields(KEY *key_info, uint used_key_parts,
List<Field> &fields)
{
if (used_key_parts < fields.elements)
return false;
List_iterator_fast<Field> li(fields);
Field *fld;
KEY_PART_INFO *start= key_info->key_part;
KEY_PART_INFO *end= start + fields.elements;
while ((fld= li++))
{
KEY_PART_INFO *key_part;
for (key_part= start; key_part < end; key_part++)
{
if (key_part->fieldnr == fld->field_index + 1)
break;
}
if (key_part == end)
return false;
}
return true;
}
bool JOIN::check_for_splittable_grouping_derived(THD *thd)
{
partition_list= 0;
st_select_lex_unit *unit= select_lex->master_unit();
TABLE_LIST *derived= unit->derived;
if (!optimizer_flag(thd, OPTIMIZER_SWITCH_SPLIT_GROUPING_DERIVED))
return false;
if (!(derived && derived->is_materialized_derived()))
return false;
if (unit->first_select()->next_select())
return false;
if (derived->prohibit_cond_pushdown)
return false;
if (derived->is_recursive_with_table())
return false;
if (group_list)
{
if (!select_lex->have_window_funcs())
partition_list= group_list;
}
else if (select_lex->have_window_funcs() &&
select_lex->window_specs.elements == 1)
{
partition_list=
select_lex->window_specs.head()->partition_list->first;
}
if (!partition_list)
return false;
ORDER *ord;
TABLE *table= 0;
key_map ref_keys;
uint group_fields= 0;
ref_keys.set_all();
for (ord= partition_list; ord; ord= ord->next, group_fields++)
{
Item *ord_item= *ord->item;
if (ord_item->real_item()->type() != Item::FIELD_ITEM)
return false;
Field *ord_field= ((Item_field *) (ord_item->real_item()))->field;
if (!table)
table= ord_field->table;
else if (table != ord_field->table)
return false;
ref_keys.intersect(ord_field->part_of_key);
}
if (ref_keys.is_clear_all())
return false;
uint i;
List<Field> grouping_fields;
List<Field> splitting_fields;
List_iterator<Item> li(fields_list);
for (ord= partition_list; ord; ord= ord->next)
{
Item *item;
i= 0;
while ((item= li++))
{
if ((*ord->item)->eq(item, 0))
break;
i++;
}
if (!item)
return false;
if (splitting_fields.push_back(derived->table->field[i], thd->mem_root))
return false;
Item_field *ord_field= (Item_field *)(item->real_item());
if (grouping_fields.push_back(ord_field->field, thd->mem_root))
return false;
li.rewind();
}
for (i= 0; i < table->s->keys; i++)
{
if (!(ref_keys.is_set(i)))
continue;
KEY *key_info= table->key_info + i;
if (key_can_be_used_to_split_by_fields(key_info,
table->actual_n_key_parts(key_info),
grouping_fields))
break;
}
if (i == table->s->keys)
return false;
derived->table->splitting_fields= splitting_fields;
is_for_splittable_grouping_derived= true;
return true;
}
bool JOIN::check_two_phase_optimization(THD *thd)
{
if (!check_for_splittable_grouping_derived(thd))
return false;
if (check_for_splittable_materialized())
return true;
return false;
}
Item *JOIN_TAB::get_splitting_cond_for_grouping_derived(THD *thd)
{
/* this is a stub */
TABLE_LIST *derived= table->pos_in_table_list;
st_select_lex *sel= derived->get_unit()->first_select();
Item *cond= 0;
table_map used_tables= OUTER_REF_TABLE_BIT;
POSITION *pos= join->best_positions;
for (; pos->table != this; pos++)
{
used_tables|= pos->table->table->map;
}
if (!pos->key)
return 0;
KEY *key_info= table->key_info + pos->key->key;
if (!key_can_be_used_to_split_by_fields(key_info,
key_info->user_defined_key_parts,
table->splitting_fields))
return 0;
create_ref_for_key(join, this, pos->key,
false, used_tables);
List<Item> cond_list;
KEY_PART_INFO *start= key_info->key_part;
KEY_PART_INFO *end= start + table->splitting_fields.elements;
List_iterator_fast<Field> li(table->splitting_fields);
Field *fld= li++;
for (ORDER *ord= sel->join->partition_list; ord;
ord= ord->next, fld= li++)
{
Item *left_item= (*ord->item)->build_clone(thd);
uint i= 0;
for (KEY_PART_INFO *key_part= start; key_part < end; key_part++, i++)
{
if (key_part->fieldnr == fld->field_index + 1)
break;
}
Item *right_item= ref.items[i]->build_clone(thd);
Item_func_eq *eq_item= 0;
right_item= right_item->build_clone(thd);
if (left_item && right_item)
{
right_item->walk(&Item::set_fields_as_dependent_processor,
false, join->select_lex);
right_item->update_used_tables();
eq_item= new (thd->mem_root) Item_func_eq(thd, left_item, right_item);
}
if (!eq_item || cond_list.push_back(eq_item, thd->mem_root))
return 0;
}
switch (cond_list.elements) {
case 0: break;
case 1: cond= cond_list.head(); break;
default: cond= new (thd->mem_root) Item_cond_and(thd, cond_list);
}
if (cond)
cond->fix_fields(thd,0);
return cond;
}
bool JOIN::inject_cond_into_where(Item *injected_cond)
{
Item *where_item= injected_cond;
@ -9152,48 +8970,6 @@ bool JOIN::inject_cond_into_where(Item *injected_cond)
}
bool JOIN::push_splitting_cond_into_derived(THD *thd, Item *cond)
{
enum_reopt_result reopt_result= REOPT_NONE;
table_map all_table_map= 0;
for (JOIN_TAB *tab= join_tab;
tab < join_tab + top_join_tab_count; tab++)
all_table_map|= tab->table->map;
reopt_result= reoptimize(cond, all_table_map & ~const_table_map, NULL);
if (reopt_result == REOPT_ERROR)
return true;
if (inject_cond_into_where(cond))
return true;
if (cond->used_tables() & OUTER_REF_TABLE_BIT)
{
select_lex->uncacheable|= UNCACHEABLE_DEPENDENT_INJECTED;
st_select_lex_unit *unit= select_lex->master_unit();
unit->uncacheable|= UNCACHEABLE_DEPENDENT_INJECTED;
}
return false;
}
bool JOIN::improve_chosen_plan(THD *thd)
{
for (JOIN_TAB *tab= join_tab + const_tables;
tab < join_tab + table_count; tab++)
{
TABLE_LIST *tbl= tab->table->pos_in_table_list;
if (tbl->is_materialized_derived())
{
st_select_lex *sel= tbl->get_unit()->first_select();
JOIN *derived_join= sel->join;
if (derived_join && derived_join->is_for_splittable_grouping_derived)
{
Item *cond= tab->get_splitting_cond_for_grouping_derived(thd);
if (cond && derived_join->push_splitting_cond_into_derived(thd, cond))
return true;
}
}
}
return false;
}
static Item * const null_ptr= NULL;
@ -9262,6 +9038,9 @@ bool JOIN::get_best_combination()
full_join=0;
hash_join= FALSE;
if (fix_all_splittings_in_plan())
DBUG_RETURN(TRUE);
fix_semijoin_strategies_for_picked_join_order(this);
JOIN_TAB_RANGE *root_range;
@ -9602,6 +9381,7 @@ static bool create_ref_for_key(JOIN *join, JOIN_TAB *j,
do
{
if (!(~used_tables & keyuse->used_tables) &&
(!keyuse->validity_ref || *keyuse->validity_ref) &&
j->keyuse_is_valid_for_access_in_chosen_plan(join, keyuse))
{
if (are_tables_local(j, keyuse->val->used_tables()))
@ -9672,6 +9452,7 @@ static bool create_ref_for_key(JOIN *join, JOIN_TAB *j,
for (i=0 ; i < keyparts ; keyuse++,i++)
{
while (((~used_tables) & keyuse->used_tables) ||
(keyuse->validity_ref && !(*keyuse->validity_ref)) ||
!j->keyuse_is_valid_for_access_in_chosen_plan(join, keyuse) ||
keyuse->keypart == NO_KEYPART ||
(keyuse->keypart !=
@ -17660,7 +17441,6 @@ err:
}
/****************************************************************************/
void *Virtual_tmp_table::operator new(size_t size, THD *thd) throw()

80
sql/sql_select.h
View File

@ -73,9 +73,45 @@ typedef struct keyuse_t {
*/
uint sj_pred_no;
/*
If this is NULL than KEYUSE is always enabled.
Otherwise it points to the enabling flag for this keyuse (true <=> enabled)
*/
bool *validity_ref;
bool is_for_hash_join() { return is_hash_join_key_no(key); }
} KEYUSE;
struct KEYUSE_EXT: public KEYUSE
{
/*
This keyuse can be used only when the partial join being extended
contains the tables from this table map
*/
table_map needed_in_prefix;
/* The enabling flag for keyuses usable for splitting */
bool validity_var;
};
/// Used when finding key fields
struct KEY_FIELD {
Field *field;
Item_bool_func *cond;
Item *val; ///< May be empty if diff constant
uint level;
uint optimize;
bool eq_func;
/**
If true, the condition this struct represents will not be satisfied
when val IS NULL.
*/
bool null_rejecting;
bool *cond_guard; /* See KEYUSE::cond_guard */
uint sj_pred_no; /* See KEYUSE::sj_pred_no */
};
#define NO_KEYPART ((uint)(-1))
class store_key;
@ -201,6 +237,8 @@ class SJ_TMP_TABLE;
class JOIN_TAB_RANGE;
class AGGR_OP;
class Filesort;
struct SplM_plan_info;
class SplM_opt_info;
typedef struct st_join_table {
st_join_table() {}
@ -614,8 +652,10 @@ typedef struct st_join_table {
bool use_order() const; ///< Use ordering provided by chosen index?
bool sort_table();
bool remove_duplicates();
Item *get_splitting_cond_for_grouping_derived(THD *thd);
void add_keyuses_for_splitting();
SplM_plan_info *choose_best_splitting(double record_count,
table_map remaining_tables);
bool fix_splitting(SplM_plan_info *spl_plan, table_map remaining_tables);
} JOIN_TAB;
@ -920,6 +960,9 @@ typedef struct st_position
Firstmatch_picker firstmatch_picker;
LooseScan_picker loosescan_picker;
Sj_materialization_picker sjmat_picker;
/* Info on splitting plan used at this position */
SplM_plan_info *spl_plan;
} POSITION;
typedef Bounds_checked_array<Item_null_result*> Item_null_array;
@ -1053,11 +1096,13 @@ protected:
/* Support for plan reoptimization with rewritten conditions. */
enum_reopt_result reoptimize(Item *added_where, table_map join_tables,
Join_plan_state *save_to);
/* Choose a subquery plan for a table-less subquery. */
bool choose_tableless_subquery_plan();
public:
void save_query_plan(Join_plan_state *save_to);
void reset_query_plan();
void restore_query_plan(Join_plan_state *restore_from);
/* Choose a subquery plan for a table-less subquery. */
bool choose_tableless_subquery_plan();
public:
JOIN_TAB *join_tab, **best_ref;
@ -1415,9 +1460,14 @@ public:
*/
bool implicit_grouping;
bool is_for_splittable_grouping_derived;
bool with_two_phase_optimization;
ORDER *partition_list;
/* Saved execution plan for this join */
Join_plan_state *save_qep;
/* Info on splittability of the table materialized by this plan*/
SplM_opt_info *spl_opt_info;
/* Contains info on keyuses usable for splitting */
Dynamic_array<KEYUSE_EXT> *ext_keyuses_for_splitting;
JOIN_TAB *sort_and_group_aggr_tab;
@ -1465,7 +1515,10 @@ public:
need_distinct= 0;
skip_sort_order= 0;
with_two_phase_optimization= 0;
is_for_splittable_grouping_derived= 0;
save_qep= 0;
spl_opt_info= 0;
ext_keyuses_for_splitting= 0;
spl_opt_info= 0;
need_tmp= 0;
hidden_group_fields= 0; /*safety*/
error= 0;
@ -1674,10 +1727,12 @@ public:
const char *message);
JOIN_TAB *first_breadth_first_tab() { return join_tab; }
bool check_two_phase_optimization(THD *thd);
bool check_for_splittable_grouping_derived(THD *thd);
bool inject_cond_into_where(Item *injected_cond);
bool push_splitting_cond_into_derived(THD *thd, Item *cond);
bool improve_chosen_plan(THD *thd);
bool check_for_splittable_materialized();
void add_keyuses_for_splitting();
bool inject_best_splitting_cond(table_map remaining_tables);
bool fix_all_splittings_in_plan();
bool transform_in_predicates_into_in_subq(THD *thd);
private:
/**
@ -2295,6 +2350,11 @@ bool open_tmp_table(TABLE *table);
void setup_tmp_table_column_bitmaps(TABLE *table, uchar *bitmaps);
double prev_record_reads(POSITION *positions, uint idx, table_map found_ref);
void fix_list_after_tbl_changes(SELECT_LEX *new_parent, List<TABLE_LIST> *tlist);
double get_tmp_table_lookup_cost(THD *thd, double row_count, uint row_size);
double get_tmp_table_write_cost(THD *thd, double row_count, uint row_size);
void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array);
bool sort_and_filter_keyuse(THD *thd, DYNAMIC_ARRAY *keyuse,
bool skip_unprefixed_keyparts);
struct st_cond_statistic
{

2
sql/sys_vars.cc
View File

@ -2457,7 +2457,7 @@ export const char *optimizer_switch_names[]=
"exists_to_in",
"orderby_uses_equalities",
"condition_pushdown_for_derived",
"split_grouping_derived",
"split_materialized",
"default",
NullS
};

14
sql/table.h
View File

@ -1033,6 +1033,8 @@ struct st_cond_statistic;
/* Bitmap of table's fields */
typedef Bitmap<MAX_FIELDS> Field_map;
class SplM_opt_info;
struct TABLE
{
TABLE() {} /* Remove gcc warning */
@ -1312,7 +1314,13 @@ public:
bool stats_is_read; /* Persistent statistics is read for the table */
bool histograms_are_read;
MDL_ticket *mdl_ticket;
List<Field> splitting_fields;
/*
This is used only for potentially splittable materialized tables and it
points to the info used by the optimizer to apply splitting optimization
*/
SplM_opt_info *spl_opt_info;
key_map keys_usable_for_splitting;
void init(THD *thd, TABLE_LIST *tl);
bool fill_item_list(List<Item> *item_list) const;
@ -1457,6 +1465,10 @@ public:
bool with_cleanup);
Field *find_field_by_name(LEX_CSTRING *str) const;
bool export_structure(THD *thd, class Row_definition_list *defs);
bool is_splittable() { return spl_opt_info != NULL; }
void set_spl_opt_info(SplM_opt_info *spl_info);
void deny_splitting();
void add_splitting_info_for_key_field(struct KEY_FIELD *key_field);
};

2
storage/tokudb/mysql-test/tokudb/r/ext_key_1_innodb.result
View File

@ -1,7 +1,7 @@
drop table if exists t;
select @@optimizer_switch;
@@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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
create table t (id int not null, x int not null, y int not null, primary key(id), key(x)) engine=innodb;
insert into t values (0,0,0),(1,1,1),(2,2,2),(3,2,3),(4,2,4);
explain select x,id from t force index (x) where x=0 and id=0;

2
storage/tokudb/mysql-test/tokudb/r/ext_key_1_tokudb.result
View File

@ -1,7 +1,7 @@
drop table if exists t;
select @@optimizer_switch;
@@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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
create table t (id int not null, x int not null, y int not null, primary key(id), key(x)) engine=tokudb;
insert into t values (0,0,0),(1,1,1),(2,2,2),(3,2,3),(4,2,4);
explain select x,id from t force index (x) where x=0 and id=0;

2
storage/tokudb/mysql-test/tokudb/r/ext_key_2_innodb.result
View File

@ -1,7 +1,7 @@
drop table if exists t;
select @@optimizer_switch;
@@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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
create table t (a int not null, b int not null, c int not null, d int not null, primary key(a,b), key(c,a)) engine=innodb;
insert into t values (0,0,0,0),(0,1,0,1);
explain select c,a,b from t where c=0 and a=0 and b=1;

2
storage/tokudb/mysql-test/tokudb/r/ext_key_2_tokudb.result
View File

@ -1,7 +1,7 @@
drop table if exists t;
select @@optimizer_switch;
@@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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_grouping_derived=on
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,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on
create table t (a int not null, b int not null, c int not null, d int not null, primary key(a,b), key(c,a)) engine=tokudb;
insert into t values (0,0,0,0),(0,1,0,1);
explain select c,a,b from t where c=0 and a=0 and b=1;