Second crash with get_fanout_with_deps() with semijoin + materialization

[Philip Stoev]

 backtrace:

#4 <signal handler called>
#5 0x0824ef48 in get_fanout_with_deps (join=0xae52e5f0, tset=0) at item_subselect.cc:4397
#6 0x0824f0ba in get_post_group_estimate (join=0xae52e5f0, join_op_rows=2) at item_subselect.cc:4531
#7 0x082464a4 in Item_in_subselect::optimize (this=0xae513ce8, out_rows=0xae8dff18, cost=0xae8dff10) at item_subselect.cc:630
#8 0x083de322 in convert_subq_to_jtbm (parent_join=0xae529368, subq_pred=0xae513ce8, remove_item=0xae8dff7b) at opt_subselect.cc:1398
#9 0x083dd077 in convert_join_subqueries_to_semijoins (join=0xae529368) at opt_subselect.cc:843
#10 0x0831b540 in JOIN::optimize (this=0xae529368) at sql_select.cc:897
#11 0x08321e11 in mysql_select (thd=0xb36d6e0, rref_pointer_array=0xb36f25c, tables=0xae5127e0, wild_num=1, fields=..., conds=0xae513ce8, og_num=0,
    order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147764736, result=0xae513e90, unit=0xb36ee40, select_lex=0xb36f120)
    at sql_select.cc:2886
#12 0x08319c67 in handle_select (thd=0xb36d6e0, lex=0xb36ede4, result=0xae513e90, setup_tables_done_option=0) at sql_select.cc:283
#13 0x082b4434 in execute_sqlcom_select (thd=0xb36d6e0, all_tables=0xae5127e0) at sql_parse.cc:5110
#14 0x082ab1f1 in mysql_execute_command (thd=0xb36d6e0) at sql_parse.cc:2250
#15 0x082b6a63 in mysql_parse (thd=0xb36d6e0,
    rawbuf=0xae5125f0 "SELECT *\nFROM t3\nWHERE ( 'h' ) IN (\nSELECT f6\nFROM t4\nWHERE ( 5 ) IN ( SELECT f2 FROM t1 )\nGROUP BY t4.f6\n)", length=107,
    found_semicolon=0xae8e1228) at sql_parse.cc:6110
#16 0x082a8e40 in dispatch_command (command=COM_QUERY, thd=0xb36d6e0,
    packet=0xb3c6321 "SELECT *\nFROM t3\nWHERE ( 'h' ) IN (\nSELECT f6\nFROM t4\nWHERE ( 5 ) IN ( SELECT f2 FROM t1 )\nGROUP BY t4.f6\n)", packet_length=107)
    at sql_parse.cc:1221
#17 0x082a829b in do_command (thd=0xb36d6e0) at sql_parse.cc:916
#18 0x082a527f in handle_one_connection (arg=0xb36d6e0) at sql_connect.cc:1191
#19 0x00821919 in start_thread () from /lib/libpthread.so.0
#20 0x0076acce in clone () from /lib/libc.so.6

optimizer switch:

semijoin=ON,materialization=ON

Explain also crashes.

Test case:

CREATE TABLE t1 ( f2 int) ;
INSERT INTO t1 VALUES (9),(6);

CREATE TABLE t3 ( f4 int) ;

CREATE TABLE t4 ( f6 varchar(1) ) ;

SET SESSION optimizer_switch='semijoin=ON,materialization=ON';

SELECT *
FROM t3
WHERE ( 'h' ) IN (
        SELECT f6
        FROM t4
        WHERE ( 5 ) IN ( SELECT f2 FROM t1 )
        GROUP BY t4.f6
);

bzr version-info:

revision-id: <email address hidden>
date: 2011-09-26 23:54:00 +0300
build-date: 2011-09-27 09:49:21 +0300
revno: 3196
branch-nick: maria-5.3