Commit 1d3a0c0e authored by sergefp@mysql.com's avatar sergefp@mysql.com

BUG#19021, Crash in ROR-index_merge optimizer:

get_best_covering_ror_intersect() was copying ror_scans starting from the 
end of the array and not from its beginning.
parent 7c701590
......@@ -260,3 +260,25 @@ t_vers t_rele t_cust filler1
7.6 a
7.6 a
drop table t1;
create table t1 (
pk int(11) not null auto_increment,
a int(11) not null default '0',
b int(11) not null default '0',
c int(11) not null default '0',
filler1 datetime, filler2 varchar(15),
filler3 longtext,
kp1 varchar(4), kp2 varchar(7),
kp3 varchar(2), kp4 varchar(4),
kp5 varchar(7),
filler4 char(1),
primary key (pk),
key idx1(a,b,c),
key idx2(c),
key idx3(kp1,kp2,kp3,kp4,kp5)
) engine=innodb default charset=latin1;
set @fill=NULL;
SELECT COUNT(*) FROM t1 WHERE b = 0 AND a = 0 AND c = 13286427 AND
kp1='279' AND kp2='ELM0678' AND kp3='6' AND kp4='10' AND kp5 = 'R ';
COUNT(*)
1
drop table t1;
......@@ -248,3 +248,55 @@ select t_vers,t_rele,t_cust,filler1 from t1 where t_vers = '7.6'
drop table t1;
# BUG#19021: Crash in index_merge/ROR-intersection optimizer under
# specific circumstances.
create table t1 (
pk int(11) not null auto_increment,
a int(11) not null default '0',
b int(11) not null default '0',
c int(11) not null default '0',
filler1 datetime, filler2 varchar(15),
filler3 longtext,
kp1 varchar(4), kp2 varchar(7),
kp3 varchar(2), kp4 varchar(4),
kp5 varchar(7),
filler4 char(1),
primary key (pk),
key idx1(a,b,c),
key idx2(c),
key idx3(kp1,kp2,kp3,kp4,kp5)
) engine=innodb default charset=latin1;
--disable_query_log
set @fill= uncompress(unhex(concat(
'F91D0000789CDD993D6FDB301086F7FE0A6D4E0105B8E3F1335D5BA028DA0EEDE28E1D320408',
'52A0713BF4D7571FB62C51A475924839080307B603E77DEE787C8FA41F9E9EEF7F1F8A87A7C3',
'AFE280C5DF9F8F7FEE9F8B1B2CB114D6902E918455245DB91300FA16E42D5201FA4EE29DA05D',
'B9FB3718A33718A3FA8C30AEFAFDE1F317D016AA67BA7A60FDE45BF5F8BA7B5BDE8812AA9F1A',
'069DB03C9804346644F3A3A6A1338DB572756A3C4D1BCC804CABF912C654AE9BB855A2B85962',
'3A479259CAE6A86C0411D01AE5483581EDCBD9A39C45252D532E533979EB9F82E971D979BDB4',
'8531105670740AFBFD1E34AAB0029E4AD0A1D46A6D0946A21A16038A5CD965CD2D524673F712',
'20C304477315CE18405EAF9BD0AFFEAC74FDA14F1FBF5BD34C769D73FBBEDF4750ADD4E5A99C',
'5C8DC04934AFA275D483D536D174C11B12AF27F8F888B41B6FC9DBA569E1FD7BD72D698130B7',
'91B23A98803512B3D31881E8DCDA2AC1754E3644C4BB3A8466750B911681274A39E35E8624B7',
'444A42AC1213F354758E3CF1A4CDD5A688C767CF1B11ABC5867CB15D8A18E0B91E9EC275BB94',
'58F33C2936F64690D55BC29E4A293D95A798D84217736CEAAA538CE1354269EE2162053FBC66',
'496D90CB53323CB279D3A6AF651B4B22B9E430743D83BE48E995A09D4FC9871C22D8D189B945',
'706911BCB8C3C774B9C08D2FC6ED853ADACA37A14A4CB2E027630E5B80ECACD939431B1CDF62',
'7D71487536EA2C678F59685E91F4B6C144BCCB94C1EBA9FA6F5552DDCA4E4539BE326A2720CB',
'45ED028EB3616AC93C46E775FEA9FA6DA7CFCEC6DEBA5FCD1F915EED4D983BDDB881528AD9AB',
'43C1576F29AAB35BDFBC21D422F52B307D350589D45225A887AC46C8EDD72D99EC3ED2E1BCEF',
'7AF26FC4C74097B6768A5EDAFA660CC64278F7E63F99AC954B')));
prepare x from @fill;
execute x;
deallocate prepare x;
--enable_query_log
set @fill=NULL;
SELECT COUNT(*) FROM t1 WHERE b = 0 AND a = 0 AND c = 13286427 AND
kp1='279' AND kp2='ELM0678' AND kp3='6' AND kp4='10' AND kp5 = 'R ';
drop table t1;
......@@ -3176,7 +3176,7 @@ TRP_ROR_INTERSECT *get_best_covering_ror_intersect(PARAM *param,
sizeof(ROR_SCAN_INFO*)*
best_num)))
DBUG_RETURN(NULL);
memcpy(trp->first_scan, ror_scan_mark, best_num*sizeof(ROR_SCAN_INFO*));
memcpy(trp->first_scan, tree->ror_scans, best_num*sizeof(ROR_SCAN_INFO*));
trp->last_scan= trp->first_scan + best_num;
trp->is_covering= TRUE;
trp->read_cost= total_cost;
......
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