[MDEV-15017] Server crashes in in st_join_table::fix_splitting Created: 2018-01-21  Updated: 2018-01-30  Resolved: 2018-01-30

Status: Closed
Project: MariaDB Server
Component/s: Optimizer
Affects Version/s: 10.3
Fix Version/s: 10.3.5

Type: Bug Priority: Major
Reporter: Elena Stepanova Assignee: Igor Babaev
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
Relates
relates to MDEV-14994 Assertion `join->best_read < double(1... Closed

 Description   

CREATE TABLE t1 (a INT) ENGINE=MyISAM;
 
CREATE TABLE t2 (pk INT, b INT, PRIMARY KEY (pk)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1,2),(3,4);
 
CREATE ALGORITHM = MERGE VIEW v2 AS SELECT pk, MIN(b) FROM t2 GROUP BY pk;
SELECT * FROM t1 LEFT JOIN v2 ON (a = pk);

10.3 ec32c050726

#3  <signal handler called>
#4  0x000055dc892569b3 in st_join_table::fix_splitting (this=0x7eff1003acb0, spl_plan=0xa5a5a5a5a5a5a5a5, remaining_tables=2) at /data/src/10.3/sql/opt_split.cc:1082
#5  0x000055dc89256ae2 in JOIN::fix_all_splittings_in_plan (this=0x7eff100191b8) at /data/src/10.3/sql/opt_split.cc:1128
#6  0x000055dc890a99e1 in JOIN::get_best_combination (this=0x7eff100191b8) at /data/src/10.3/sql/sql_select.cc:9472
#7  0x000055dc890939cf in JOIN::optimize_stage2 (this=0x7eff100191b8) at /data/src/10.3/sql/sql_select.cc:1993
#8  0x000055dc890938e1 in JOIN::optimize_inner (this=0x7eff100191b8) at /data/src/10.3/sql/sql_select.cc:1972
#9  0x000055dc890920e1 in JOIN::optimize (this=0x7eff100191b8) at /data/src/10.3/sql/sql_select.cc:1544
#10 0x000055dc8909b89c in mysql_select (thd=0x7eff10000b00, tables=0x7eff10014e50, wild_num=1, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7eff10019198, unit=0x7eff10004890, select_lex=0x7eff10004fe8) at /data/src/10.3/sql/sql_select.cc:4236
#11 0x000055dc8908d88a in handle_select (thd=0x7eff10000b00, lex=0x7eff100047c8, result=0x7eff10019198, setup_tables_done_option=0) at /data/src/10.3/sql/sql_select.cc:379
#12 0x000055dc89058956 in execute_sqlcom_select (thd=0x7eff10000b00, all_tables=0x7eff10014e50) at /data/src/10.3/sql/sql_parse.cc:6524
#13 0x000055dc8904f040 in mysql_execute_command (thd=0x7eff10000b00) at /data/src/10.3/sql/sql_parse.cc:3745
#14 0x000055dc8905c2aa in mysql_parse (thd=0x7eff10000b00, rawbuf=0x7eff10014c38 "SELECT * FROM t1 LEFT JOIN v2 ON (a = pk)", length=41, parser_state=0x7eff205525f0, is_com_multi=false, is_next_command=false) at /data/src/10.3/sql/sql_parse.cc:7981
#15 0x000055dc89049aef in dispatch_command (command=COM_QUERY, thd=0x7eff10000b00, packet=0x7eff1000b141 "SELECT * FROM t1 LEFT JOIN v2 ON (a = pk)", packet_length=41, is_com_multi=false, is_next_command=false) at /data/src/10.3/sql/sql_parse.cc:1826
#16 0x000055dc89048523 in do_command (thd=0x7eff10000b00) at /data/src/10.3/sql/sql_parse.cc:1370
#17 0x000055dc891af768 in do_handle_one_connection (connect=0x55dc8cb76ec0) at /data/src/10.3/sql/sql_connect.cc:1401
#18 0x000055dc891af4f5 in handle_one_connection (arg=0x55dc8cb76ec0) at /data/src/10.3/sql/sql_connect.cc:1307
#19 0x000055dc8964d0b8 in pfs_spawn_thread (arg=0x55dc8cb926a0) at /data/src/10.3/storage/perfschema/pfs.cc:1862
#20 0x00007eff27fba494 in start_thread (arg=0x7eff20553700) at pthread_create.c:333
#21 0x00007eff263a093f in clone () from /lib/x86_64-linux-gnu/libc.so.6



 Comments   
Comment by Alice Sherepa [ 2018-01-22 ]

Reproducible after commit 1e8a81dea67a66

Comment by Igor Babaev [ 2018-01-30 ]

A fix for this bug was pushed into the 10.3 tree.

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