database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

Bug#48052: Valgrind warning - uninitialized value in

Browse Source 
init_read_record() - (records.cc:274)
      
Item_cond::used_tables_cache was accessed in
records.cc#init_read_record() without being initialized. It had
not been initialized because it was wrongly assumed that the
Item's variables would not be accessed, and hence
quick_fix_field() was used instead of fix_fields() to save a few
CPU cycles at creation time.

The fix is to properly initilize the Item by replacing
quick_fix_field() with fix_fields().


mysql-test/r/select.result:
  Add test for BUG#48052
mysql-test/t/select.test:
  Add test for BUG#48052
sql/sql_select.cc:
  Properly initialize Item_cond_and by calling fix_fields (instead of quick_fix_field) when the Item that "ANDs" WHERE clause conditions with HAVING clause conditions is created.
This commit is contained in:
Jorgen Loland
2009-11-13 12:22:39 +01:00
parent cf872354a8
commit a120e969a8
3 changed files with 53 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
mysql-test/r/select.result
View File

@ -4591,4 +4591,22 @@ field2
15:13:38
drop table A,AA,B,BB;
#end of test for bug#45266
#
# BUG#48052: Valgrind warning - uninitialized value in init_read_record()
#
CREATE TABLE t1 (
pk int(11) NOT NULL,
i int(11) DEFAULT NULL,
v varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (2,7,'m');
INSERT INTO t1 VALUES (3,9,'m');
SELECT v
FROM t1
WHERE NOT pk > 0
HAVING v <= 't'
ORDER BY pk;
v
DROP TABLE t1;
End of 5.1 tests