Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Duplicate
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11.1.2, 11.2.1
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None
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Ubuntu 20.04 x86-64, docker image mariadb:11.1.2
Description
PoC:
SELECT ( WITH x ( x ) AS ( WITH x ( x ) AS ( SELECT 1 ) SELECT ( SELECT x ) FROM x ) SELECT x FROM x WHERE x IN ( SELECT NULL GROUP BY x ) ) ; |
docker log:
mariadbd(my_print_stacktrace+0x32)[0x55d5aa30c7c2]
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mariadbd(handle_fatal_signal+0x488)[0x55d5a9de5cf8]
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/lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7fe3d9424520]
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mariadbd(_ZN14Item_subselect12is_expensiveEv+0x42)[0x55d5a9ec3d82]
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mariadbd(_ZN20Item_direct_view_ref4walkEM4ItemFbPvEbS1_+0x31)[0x55d5a9e15271]
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mariadbd(+0x750eed)[0x55d5a9a90eed]
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mariadbd(+0x750de1)[0x55d5a9a90de1]
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mariadbd(+0x8938ee)[0x55d5a9bd38ee]
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mariadbd(_ZN4JOIN15optimize_stage2Ev+0xa18)[0x55d5a9beec28]
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mariadbd(_ZN4JOIN14optimize_innerEv+0x1437)[0x55d5a9bf28f7]
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mariadbd(_ZN4JOIN8optimizeEv+0xda)[0x55d5a9bf2e2a]
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mariadbd(_ZN13st_select_lex31optimize_unflattened_subqueriesEb+0x115)[0x55d5a9b4ca55]
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mariadbd(_ZN4JOIN28optimize_constant_subqueriesEv+0x35)[0x55d5a9cebd55]
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mariadbd(_ZN4JOIN14optimize_innerEv+0x503)[0x55d5a9bf19c3]
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mariadbd(_ZN4JOIN8optimizeEv+0xda)[0x55d5a9bf2e2a]
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mariadbd(_Z12mysql_selectP3THDP10TABLE_LISTR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0xd1)[0x55d5a9bf2f21]
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mariadbd(_Z13handle_selectP3THDP3LEXP13select_resulty+0x154)[0x55d5a9bf3774]
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mariadbd(+0x826f55)[0x55d5a9b66f55]
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mariadbd(_Z21mysql_execute_commandP3THDb+0x419e)[0x55d5a9b75f0e]
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mariadbd(_Z11mysql_parseP3THDPcjP12Parser_state+0x1e7)[0x55d5a9b77237]
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mariadbd(_Z16dispatch_command19enum_server_commandP3THDPcjb+0x14bd)[0x55d5a9b79a1d]
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mariadbd(_Z10do_commandP3THDb+0x138)[0x55d5a9b7b818]
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mariadbd(_Z24do_handle_one_connectionP7CONNECTb+0x3bf)[0x55d5a9ca33af]
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mariadbd(handle_one_connection+0x5d)[0x55d5a9ca36fd]
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mariadbd(+0xcd1906)[0x55d5aa011906]
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/lib/x86_64-linux-gnu/libc.so.6(+0x94b43)[0x7fe3d9476b43]
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/lib/x86_64-linux-gnu/libc.so.6(clone+0x44)[0x7fe3d9507bb4]
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Trying to get some variables.
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Some pointers may be invalid and cause the dump to abort.
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Query (0x7fe3780130d8): SELECT ( WITH x ( x ) AS ( WITH x ( x ) AS ( SELECT 1 ) SELECT ( SELECT x ) FROM x ) SELECT x FROM x WHERE x IN ( SELECT NULL GROUP BY x ) )
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Connection ID (thread ID): 4
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Status: NOT_KILLED
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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
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Attachments
Issue Links
- duplicates
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MDEV-28621 group by optimization incorrectly removing subquery where subject buried in a function
- Closed
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MDEV-28622 Item_subselect eliminated flag set but Item still evaluated/used.
- Closed