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Bug#58396 group_concat and explain extended are still crashy

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Explain fails at fix_fields stage and some items are left unfixed,
particulary Item_group_concat. Item_group_concat::orig_args field
is uninitialized in this case and Item_group_concat::print call 
leads to crash.
The fix:
move the initialization of Item_group_concat::orig_args
into constructor.
This commit is contained in:
Sergey Glukhov 2010-12-13 13:39:26 +03:00
parent 6a84582c67
commit 4096f35a39
3 changed files with 24 additions and 1 deletions
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12
mysql-test/r/func_gconcat.result
View file

@ -1037,4 +1037,16 @@ INSERT INTO t1 values (0),(0);
SELECT POLYGON((SELECT 1 FROM (SELECT 1 IN (GROUP_CONCAT(t1.f1)) FROM t1, t1 t GROUP BY t.f1 ) d));
ERROR 22007: Illegal non geometric '(select 1 from (select (1 = group_concat(`test`.`t1`.`f1` separator ',')) AS `1 IN (GROUP_CONCAT(t1.f1))` from `test`.`t1` join `test`.`t1` `t` group by `t`.`f1`) `d`)' value found during parsing
DROP TABLE t1;
#
# Bug#58396 group_concat and explain extended are still crashy
#
CREATE TABLE t1(a INT);
EXPLAIN EXTENDED SELECT UPDATEXML('1', a, '1')
FROM t1 ORDER BY (SELECT GROUP_CONCAT(1) FROM t1);
ERROR HY000: Only constant XPATH queries are supported
SHOW WARNINGS;
Level Code Message
Error 1105 Only constant XPATH queries are supported
Note 1003 select updatexml('1',`test`.`t1`.`a`,'1') AS `UPDATEXML('1', a, '1')` from `test`.`t1` order by (select group_concat(1 separator ',') from `test`.`t1`)
DROP TABLE t1;
End of 5.1 tests

11
mysql-test/t/func_gconcat.test
View file

@ -746,4 +746,15 @@ SELECT POLYGON((SELECT 1 FROM (SELECT 1 IN (GROUP_CONCAT(t1.f1)) FROM t1, t1 t G
--enable_ps_protocol
DROP TABLE t1;
--echo #
--echo # Bug#58396 group_concat and explain extended are still crashy
--echo #
CREATE TABLE t1(a INT);
--error ER_UNKNOWN_ERROR
EXPLAIN EXTENDED SELECT UPDATEXML('1', a, '1')
FROM t1 ORDER BY (SELECT GROUP_CONCAT(1) FROM t1);
SHOW WARNINGS;
DROP TABLE t1;
--echo End of 5.1 tests

2
sql/item_sum.cc
View file

@ -3003,6 +3003,7 @@ Item_func_group_concat(Name_resolution_context *context_arg,
order_item->item= arg_ptr++;
}
}
memcpy(orig_args, args, sizeof(Item*) * arg_count);
}
@ -3233,7 +3234,6 @@ Item_func_group_concat::fix_fields(THD *thd, Item **ref)
if (check_sum_func(thd, ref))
return TRUE;
memcpy (orig_args, args, sizeof (Item *) * arg_count);
fixed= 1;
return FALSE;
}