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Fix for bug#49465: valgrind warnings and incorrect live checksum...

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Problem: inserting a record we don't set unused null bits in the
record buffer if no default field values used.
That may lead to wrong live checksum calculation.

Fix: set unused null bits in the record buffer in such cases.


mysql-test/r/myisam.result:
  Fix for bug#49465: valgrind warnings and incorrect live checksum...
    - test result.
mysql-test/t/myisam.test:
  Fix for bug#49465: valgrind warnings and incorrect live checksum...
    - test case.
sql/sql_insert.cc:
  Fix for bug#49465: valgrind warnings and incorrect live checksum...
    - set unused null bits to 1 in the record buffer in case we
  don't call restore_record() before a fill_record() call
  (when no default values used).
This commit is contained in:
Ramil Kalimullin 2009-12-17 09:55:03 +04:00
parent b72f278958
commit 06be03f77c
3 changed files with 39 additions and 1 deletions
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15
mysql-test/r/myisam.result
View file

@ -1883,4 +1883,19 @@ CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
DROP TABLE t1;
#
# Bug #49465: valgrind warnings and incorrect live checksum...
#
CREATE TABLE t1(
a VARCHAR(1), b VARCHAR(1), c VARCHAR(1),
f VARCHAR(1), g VARCHAR(1), h VARCHAR(1),
i VARCHAR(1), j VARCHAR(1), k VARCHAR(1)) CHECKSUM=1;
INSERT INTO t1 VALUES('', '', '', '', '', '', '', '', '');
CHECKSUM TABLE t1 QUICK;
Table Checksum
test.t1 467455460
CHECKSUM TABLE t1 EXTENDED;
Table Checksum
test.t1 467455460
DROP TABLE t1;
End of 5.0 tests

14
mysql-test/t/myisam.test
View file

@ -1225,4 +1225,18 @@ SELECT a FROM t1;
CHECK TABLE t1;
DROP TABLE t1;
--echo #
--echo # Bug #49465: valgrind warnings and incorrect live checksum...
--echo #
CREATE TABLE t1(
a VARCHAR(1), b VARCHAR(1), c VARCHAR(1),
f VARCHAR(1), g VARCHAR(1), h VARCHAR(1),
i VARCHAR(1), j VARCHAR(1), k VARCHAR(1)) CHECKSUM=1;
INSERT INTO t1 VALUES('', '', '', '', '', '', '', '', '');
CHECKSUM TABLE t1 QUICK;
CHECKSUM TABLE t1 EXTENDED;
DROP TABLE t1;
--echo End of 5.0 tests

11
sql/sql_insert.cc
View file

@ -787,12 +787,21 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
restore_record(table,s->default_values); // Get empty record
else
{
TABLE_SHARE *share= table->s;
/*
Fix delete marker. No need to restore rest of record since it will
be overwritten by fill_record() anyway (and fill_record() does not
use default values in this case).
*/
table->record[0][0]= table->s->default_values[0];
table->record[0][0]= share->default_values[0];
/* Fix undefined null_bits. */
if (share->null_bytes > 1 && share->last_null_bit_pos)
{
table->record[0][share->null_bytes - 1]=
share->default_values[share->null_bytes - 1];
}
}
if (fill_record_n_invoke_before_triggers(thd, table->field, *values, 0,
table->triggers,