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key_cache.result, key_cache.test:

Browse Source 
Added a test case for bug #6447.
mf_keycache.c:
  Fixed bug #6447. Erronious code in the key_cache_read function
  caused problems when reading key blocks with offset>0 into
  key cache. The code of key_cache_insert and key_cache_write
  was modified similarly.


mysys/mf_keycache.c:
  Fixed bug #6447. Erronious code in the key_cache_read function
  caused problems when reading key blocks with offset>0 into
  key cache. The code of key_cache_insert and key_cache_write
  was modified similarly.
mysql-test/t/key_cache.test:
  Added a test case for bug #6447.
mysql-test/r/key_cache.result:
  Added a test case for bug #6447.
This commit is contained in:
unknown
2004-11-16 13:58:49 -08:00
parent b478635110
commit 2094d80b48
3 changed files with 34 additions and 12 deletions
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10
mysql-test/r/key_cache.result
View File

@ -277,3 +277,13 @@ Key_blocks_unused KEY_BLOCKS_UNUSED
set global keycache2.key_buffer_size=0;
set global keycache3.key_buffer_size=100;
set global keycache3.key_buffer_size=0;
create table t1 (mytext text, FULLTEXT (mytext));
insert t1 values ('aaabbb');
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
set GLOBAL key_cache_block_size=2048;
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
drop table t1;

11
mysql-test/t/key_cache.test
View File

@ -156,3 +156,14 @@ set global keycache2.key_buffer_size=0;
# Test to set up a too small size for a key cache (bug #2064)
set global keycache3.key_buffer_size=100;
set global keycache3.key_buffer_size=0;
# Test case for buf 6447
create table t1 (mytext text, FULLTEXT (mytext));
insert t1 values ('aaabbb');
check table t1;
set GLOBAL key_cache_block_size=2048;
check table t1;
drop table t1;

25
mysys/mf_keycache.c
View File

@ -1699,11 +1699,12 @@ byte *key_cache_read(KEY_CACHE *keycache,
keycache_pthread_mutex_unlock(&keycache->cache_lock);
goto no_key_cache;
}
read_length= length > keycache->key_cache_block_size ?
keycache->key_cache_block_size : length;
KEYCACHE_DBUG_ASSERT(read_length > 0);
offset= (uint) (filepos & (keycache->key_cache_block_size-1));
filepos-= offset;
read_length= length;
set_if_smaller(read_length, keycache->key_cache_block_size-offset);
KEYCACHE_DBUG_ASSERT(read_length > 0);
#ifndef THREAD
if (block_length > keycache->key_cache_block_size || offset)
return_buffer=0;
@ -1773,7 +1774,7 @@ byte *key_cache_read(KEY_CACHE *keycache,
return (block->buffer);
#endif
buff+= read_length;
filepos+= read_length;
filepos+= read_length+offset;
} while ((length-= read_length));
DBUG_RETURN(start);
@ -1835,12 +1836,12 @@ int key_cache_insert(KEY_CACHE *keycache,
keycache_pthread_mutex_unlock(&keycache->cache_lock);
DBUG_RETURN(0);
}
read_length= length > keycache->key_cache_block_size ?
keycache->key_cache_block_size : length;
KEYCACHE_DBUG_ASSERT(read_length > 0);
offset= (uint) (filepos & (keycache->key_cache_block_size-1));
/* Read data into key cache from buff in key_cache_block_size incr. */
filepos-= offset;
read_length= length;
set_if_smaller(read_length, keycache->key_cache_block_size-offset);
KEYCACHE_DBUG_ASSERT(read_length > 0);
inc_counter_for_resize_op(keycache);
keycache->global_cache_r_requests++;
@ -1882,7 +1883,7 @@ int key_cache_insert(KEY_CACHE *keycache,
DBUG_RETURN(1);
buff+= read_length;
filepos+= read_length;
filepos+= read_length+offset;
} while ((length-= read_length));
}
@ -1959,12 +1960,12 @@ int key_cache_write(KEY_CACHE *keycache,
keycache_pthread_mutex_unlock(&keycache->cache_lock);
goto no_key_cache;
}
read_length= length > keycache->key_cache_block_size ?
keycache->key_cache_block_size : length;
KEYCACHE_DBUG_ASSERT(read_length > 0);
offset= (uint) (filepos & (keycache->key_cache_block_size-1));
/* Write data in key_cache_block_size increments */
filepos-= offset;
read_length= length;
set_if_smaller(read_length, keycache->key_cache_block_size-offset);
KEYCACHE_DBUG_ASSERT(read_length > 0);
inc_counter_for_resize_op(keycache);
keycache->global_cache_w_requests++;
@ -2032,7 +2033,7 @@ int key_cache_write(KEY_CACHE *keycache,
next_block:
buff+= read_length;
filepos+= read_length;
filepos+= read_length+offset;
offset= 0;
} while ((length-= read_length));