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A fix (bug #6878: Crash with engine=memory).

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heap/hp_create.c:
  A fix (bug #6878: Crash with engine=memory).
  Record length should be >= sizeof(byte*).
This commit is contained in:
unknown
2004-12-02 15:06:15 +04:00
parent 3848713956
commit 33a4b35ec8
3 changed files with 26 additions and 0 deletions
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7
heap/hp_create.c
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@@ -41,6 +41,13 @@ int heap_create(const char *name, uint keys, HP_KEYDEF *keydef,
{ {
HP_KEYDEF *keyinfo; HP_KEYDEF *keyinfo;
DBUG_PRINT("info",("Initializing new table")); DBUG_PRINT("info",("Initializing new table"));
/*
We have to store sometimes byte* del_link in records,
so the record length should be at least sizeof(byte*)
*/
set_if_bigger(reclength, sizeof (byte*));
for (i= key_segs= max_length= 0, keyinfo= keydef; i < keys; i++, keyinfo++) for (i= key_segs= max_length= 0, keyinfo= keydef; i < keys; i++, keyinfo++)
{ {
bzero((char*) &keyinfo->block,sizeof(keyinfo->block)); bzero((char*) &keyinfo->block,sizeof(keyinfo->block));

9
mysql-test/r/heap.result
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@@ -240,3 +240,12 @@ SELECT * FROM t1;
pseudo date pseudo date
ZoomZip 1101106546 ZoomZip 1101106546
DROP TABLE t1; DROP TABLE t1;
create table t1(a char(2)) engine=memory;
insert into t1 values (NULL), (NULL);
delete from t1 where a is null;
insert into t1 values ('2'), ('3');
select * from t1;
a
3
2
drop table t1;

10
mysql-test/t/heap.test
View File

@@ -185,3 +185,13 @@ DELETE FROM t1 WHERE date<1101106546;
SELECT * FROM t1; SELECT * FROM t1;
DROP TABLE t1; DROP TABLE t1;
#
# Bug #6878: a problem with small length records
#
create table t1(a char(2)) engine=memory;
insert into t1 values (NULL), (NULL);
delete from t1 where a is null;
insert into t1 values ('2'), ('3');
select * from t1;
drop table t1;