Percona Server moved to https://jira.percona.com/projects/PS

create_duplicate_weedout_tmp_table() leaves key_part_flag uninitialized

Bug #1157037 reported by Alexey Kopytov on 2013-03-19

This bug affects 1 person

	Status	Importance	Assigned to	Milestone
MySQL Server	Unknown	Unknown	mysql-bugs #68713
Percona Server moved to https://jira.percona.com/projects/PS	Fix Released	High	Laurynas Biveinis	Percona Server moved to https://jira.percona.com/projects/PS 5.6.11-60.3
5.1	Invalid	Undecided	Unassigned
5.5	Invalid	Undecided	Unassigned
5.6	Fix Released	High	Laurynas Biveinis	Percona Server moved to https://jira.percona.com/projects/PS 5.6.11-60.3

Bug Description

create_duplicate_weedout_tmp_table() leaves the key_part_flag field of key_part_info uninitialized when building a key definition for the temporary table. Under some circumstances it may also use that uninitialized value when adding the HA_END_SPACE_ARE_EQUAL flag:

    {
      key_part_info->null_bit=0;
      key_part_info->field= field;
      key_part_info->offset= field->offset(table->record[0]);
      key_part_info->length= (uint16) field->key_length();
      key_part_info->type= (uint8) field->key_type();
      key_part_info->key_type = FIELDFLAG_BINARY;
      if (!using_unique_constraint)
      {
        key_field= field->new_key_field(thd->mem_root, table, group_buff);
        if (!key_field)
   goto err;
        key_part_info->key_part_flag|= HA_END_SPACE_ARE_EQUAL; //todo need this?
      }
      keyinfo->key_length+= key_part_info->length;
    }

The table being created may be either HEAP or MyISAM. The key_part_flag field is not used by the HEAP engine in MySQL (though it is used in Percona Server), but it is used by MyISAM in all branches.

For comparison, create_tmp_table() always initializes that field by calling KEY_PART_INFO::init_from_field().

It may take me a while to build a test case for MySQL that would fail (or indicate uninitialized value usage under Valgrind). However, the problem should be clear from code analysis and comparison with create_tmp_table().

Tags:

Related branches

lp:~sergei.glushchenko/percona-server/56-bug1157037

Rejected for merging into lp:percona-server/5.6

Laurynas Biveinis (community): Disapprove on 2013-05-13

lp:~laurynas-biveinis/percona-server/5.6-merge-1

Merged into lp:percona-server/5.6 at revision 349

Alexey Kopytov (community): Approve on 2013-05-21

Percona core: Pending requested 2013-05-20

Diff: 60833 lines (+35068/-6890)

650 files modified

.bzrignore (+0/-1)
COPYING.innodb-deadlock-count-patch (+0/-30)
COPYING.show_temp_51 (+0/-13)
Makefile (+0/-78)
Percona-Server/CMakeLists.txt (+7/-0)
Percona-Server/client/CMakeLists.txt (+2/-1)
Percona-Server/client/client_priv.h (+3/-0)
Percona-Server/client/mysql.cc (+55/-1)
Percona-Server/client/mysqldump.c (+7/-3)
Percona-Server/client/sql_string.cc (+44/-0)
Percona-Server/client/sql_string.h (+10/-0)
Percona-Server/cmake/dtrace.cmake (+1/-1)
Percona-Server/cmake/install_layout.cmake (+2/-2)
Percona-Server/config.h.cmake (+1/-1)
Percona-Server/extra/comp_err.c (+130/-49)
Percona-Server/extra/innochecksum.cc (+76/-2)
Percona-Server/include/atomic/x86-gcc.h (+12/-16)
Percona-Server/include/heap.h (+69/-12)
Percona-Server/include/m_string.h (+40/-0)
Percona-Server/include/my_getopt.h (+18/-0)
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Percona-Server/include/mysql/plugin_auth.h.pp (+13/-0)
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Percona-Server/storage/heap/hp_record.c (+498/-0)
Percona-Server/storage/heap/hp_rfirst.c (+4/-1)
Percona-Server/storage/heap/hp_rkey.c (+4/-1)
Percona-Server/storage/heap/hp_rlast.c (+4/-1)
Percona-Server/storage/heap/hp_rnext.c (+4/-1)
Percona-Server/storage/heap/hp_rprev.c (+4/-1)
Percona-Server/storage/heap/hp_rrnd.c (+17/-8)
Percona-Server/storage/heap/hp_rsame.c (+9/-2)
Percona-Server/storage/heap/hp_scan.c (+16/-23)
Percona-Server/storage/heap/hp_test1.c (+16/-1)
Percona-Server/storage/heap/hp_test2.c (+25/-2)
Percona-Server/storage/heap/hp_update.c (+40/-11)
Percona-Server/storage/heap/hp_write.c (+19/-45)
Percona-Server/storage/innobase/CMakeLists.txt (+1/-0)
Percona-Server/storage/innobase/btr/btr0btr.cc (+26/-2)
Percona-Server/storage/innobase/btr/btr0cur.cc (+125/-18)
Percona-Server/storage/innobase/btr/btr0pcur.cc (+1/-0)
Percona-Server/storage/innobase/buf/buf0buf.cc (+172/-14)
Percona-Server/storage/innobase/buf/buf0flu.cc (+4/-4)
Percona-Server/storage/innobase/buf/buf0rea.cc (+24/-20)
Percona-Server/storage/innobase/dict/dict0dict.cc (+38/-0)
Percona-Server/storage/innobase/dict/dict0mem.cc (+3/-0)
Percona-Server/storage/innobase/fil/fil0fil.cc (+88/-9)
Percona-Server/storage/innobase/fsp/fsp0fsp.cc (+16/-2)
Percona-Server/storage/innobase/handler/ha_innodb.cc (+591/-31)
Percona-Server/storage/innobase/handler/ha_innodb.h (+3/-0)
Percona-Server/storage/innobase/handler/handler0alter.cc (+10/-0)
Percona-Server/storage/innobase/handler/i_s.cc (+372/-0)
Percona-Server/storage/innobase/handler/i_s.h (+1/-0)
Percona-Server/storage/innobase/ibuf/ibuf0ibuf.cc (+42/-1)
Percona-Server/storage/innobase/include/btr0btr.h (+4/-1)
Percona-Server/storage/innobase/include/btr0cur.h (+3/-2)
Percona-Server/storage/innobase/include/buf0buf.h (+4/-0)
Percona-Server/storage/innobase/include/buf0rea.h (+6/-3)
Percona-Server/storage/innobase/include/dict0dict.h (+8/-0)
Percona-Server/storage/innobase/include/dict0mem.h (+10/-0)
Percona-Server/storage/innobase/include/fil0fil.h (+22/-4)
Percona-Server/storage/innobase/include/ha_prototypes.h (+7/-0)
Percona-Server/storage/innobase/include/ibuf0ibuf.h (+16/-0)
Percona-Server/storage/innobase/include/lock0lock.h (+3/-0)
Percona-Server/storage/innobase/include/log0log.h (+8/-0)
Percona-Server/storage/innobase/include/log0online.h (+190/-0)
Percona-Server/storage/innobase/include/log0recv.h (+37/-0)
Percona-Server/storage/innobase/include/mach0data.ic (+13/-13)
Percona-Server/storage/innobase/include/os0file.h (+47/-14)
Percona-Server/storage/innobase/include/os0file.ic (+5/-2)
Percona-Server/storage/innobase/include/os0proc.h (+2/-1)
Percona-Server/storage/innobase/include/read0read.h (+2/-1)
Percona-Server/storage/innobase/include/srv0srv.h (+90/-1)
Percona-Server/storage/innobase/include/sync0rw.h (+15/-14)
Percona-Server/storage/innobase/include/sync0rw.ic (+6/-6)
Percona-Server/storage/innobase/include/sync0sync.h (+29/-14)
Percona-Server/storage/innobase/include/sync0sync.ic (+6/-6)
Percona-Server/storage/innobase/include/trx0trx.h (+14/-0)
Percona-Server/storage/innobase/include/univ.i (+6/-1)
Percona-Server/storage/innobase/include/ut0rbt.h (+22/-0)
Percona-Server/storage/innobase/lock/lock0lock.cc (+73/-11)
Percona-Server/storage/innobase/log/log0log.cc (+141/-13)
Percona-Server/storage/innobase/log/log0online.cc (+1695/-0)
Percona-Server/storage/innobase/log/log0recv.cc (+27/-6)
Percona-Server/storage/innobase/os/os0file.cc (+135/-19)
Percona-Server/storage/innobase/os/os0proc.cc (+55/-3)
Percona-Server/storage/innobase/que/que0que.cc (+16/-0)
Percona-Server/storage/innobase/read/read0read.cc (+9/-8)
Percona-Server/storage/innobase/row/row0ins.cc (+31/-4)
Percona-Server/storage/innobase/row/row0log.cc (+1/-1)
Percona-Server/storage/innobase/row/row0merge.cc (+7/-2)
Percona-Server/storage/innobase/row/row0mysql.cc (+26/-10)
Percona-Server/storage/innobase/row/row0sel.cc (+11/-2)
Percona-Server/storage/innobase/row/row0upd.cc (+16/-5)
Percona-Server/storage/innobase/srv/srv0conc.cc (+20/-0)
Percona-Server/storage/innobase/srv/srv0srv.cc (+347/-14)
Percona-Server/storage/innobase/srv/srv0start.cc (+32/-2)
Percona-Server/storage/innobase/sync/sync0arr.cc (+5/-7)
Percona-Server/storage/innobase/sync/sync0rw.cc (+42/-10)
Percona-Server/storage/innobase/sync/sync0sync.cc (+29/-10)
Percona-Server/storage/innobase/trx/trx0trx.cc (+64/-4)
Percona-Server/storage/innobase/ut/ut0rbt.cc (+26/-1)
Percona-Server/storage/myisam/ha_myisam.cc (+81/-4)
Percona-Server/storage/myisam/mi_check.c (+1/-1)
Percona-Server/storage/myisam/myisamdef.h (+4/-4)
Percona-Server/storage/myisam/sort.c (+76/-75)
Percona-Server/strings/ctype-simple.c (+3/-12)
Percona-Server/support-files/mysql.server.sh (+15/-15)
build/build-binary.sh (+2/-1)
build/build-shared-compat-rpm.sh (+157/-0)
build/debian/libmysqlclient-dev.install (+1/-0)
build/debian/percona-server-server-5.6.install (+1/-0)
build/debian/rules (+35/-16)
build/percona-server.spec (+7/-0)
build/percona-shared-compat.spec (+93/-0)
doc/Makefile (+0/-145)
doc/make.bat (+0/-170)
doc/source/conf.py (+0/-270)
doc/source/diagnostics/index_info_schema_tables.rst (+0/-15)
doc/source/diagnostics/innodb_deadlock_count.rst (+57/-0)
doc/source/diagnostics/innodb_show_lock_names.rst (+24/-0)
doc/source/diagnostics/innodb_show_status.rst (+475/-0)
doc/source/diagnostics/mysql_syslog.rst (+43/-0)
doc/source/diagnostics/show_engines.rst (+40/-0)
doc/source/diagnostics/slow_extended_55.rst (+377/-0)
doc/source/diagnostics/thread_based_profiling.rst (+17/-0)
doc/source/diagnostics/user_stats.rst (+242/-0)
doc/source/flexibility/buff_read_ahead_area.rst (+36/-0)
doc/source/flexibility/improved_memory_engine.rst (+190/-0)
doc/source/flexibility/innodb_files_extend.rst (+25/-0)
doc/source/flexibility/log_warnings_suppress.rst (+53/-0)
doc/source/flexibility/max_binlog_files.rst (+47/-0)
doc/source/flexibility/mysqldump_ignore_create_error.rst (+0/-22)
doc/source/index.rst (+20/-0)
doc/source/index_info_schema_tables.rst (+58/-0)
doc/source/installation.rst (+4/-0)
doc/source/installation/apt_repo.rst (+0/-65)
doc/source/installation/yum_repo.rst (+0/-81)
doc/source/management/changed_page_tracking.rst (+85/-0)
doc/source/management/enforce_engine.rst (+36/-0)
doc/source/management/expanded_program_option_modifiers.rst (+137/-0)
doc/source/management/innodb_fake_changes.rst (+70/-0)
doc/source/management/innodb_fast_index_creation.rst (+63/-0)
doc/source/management/innodb_kill_idle_trx.rst (+25/-0)
doc/source/management/pam_plugin.rst (+72/-0)
doc/source/management/secure_file_priv_extended.rst (+27/-0)
doc/source/management/udf_maatkit.rst (+49/-0)
doc/source/management/utility_user.rst (+86/-0)
doc/source/percona-theme/layout.html (+0/-368)
doc/source/percona-theme/searchbox.html (+0/-22)
doc/source/percona-theme/static/default.css_t (+0/-433)
doc/source/percona-theme/static/jquery.min.js (+0/-154)
doc/source/percona-theme/static/percona.com.css (+0/-1850)
doc/source/percona-theme/static/percona.com.js (+0/-269)
doc/source/percona-theme/static/sidebar.js (+0/-151)
doc/source/percona-theme/theme.conf (+0/-32)
doc/source/performance/innodb_numa_support.rst (+66/-0)
doc/source/performance/query_cache_enhance.rst (+123/-0)
doc/source/release-notes/Percona-Server-5.6.5-60.0.rst (+0/-26)
doc/source/release-notes/Percona-Server-5.6.6-60.1.rst (+0/-18)
doc/source/release-notes/release-notes_index.rst (+0/-11)
doc/source/reliability/error_pad.rst (+55/-0)
doc/source/reliability/log_connection_error.rst (+14/-0)
doc/source/reliability/show_slave_status_nolock.rst (+23/-0)
doc/source/upstream-bug-fixes.rst (+0/-19)
lrusort.py (+0/-38)
subunit2junitxml (+0/-65)
uninstall_tests.sh (+0/-24)

Laurynas Biveinis (laurynas-biveinis) on 2014-11-07

tags:

added: upstream

Revision history for this message

Shahriyar Rzayev (rzayev-sehriyar) wrote on 2018-01-25:

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-644

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