1berry/MariaDB-server
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

BUG#24566 - Incorrect key file for table ( the size of table is more than 2G)

Browse Source 
Accessing a file that is bigger than 2G may report that read/write operation
failed. This may affect anything that uses my_pread/my_pwrite functions, e.g.
MyISAM, ARCHIVE, binary log.

For MyISAM INSERT may report that table is crashed when writing to a table
that is bigger than 2G.

This is fixed by using proper offset type in my_pread/my_pwrite functions on
systems that do not have native pread/pwrite calls.

Affects systems that do not have native pread/pwrite calls, e.g. Windows.

No test case for this fix, since it requires huge table.
This commit is contained in:
svoj@mysql.com/april.(none) 2007-03-25 00:24:39 +04:00
parent ccb9d448f3
commit 1b64741b9d
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
mysys/my_pread.c
View File

@ -37,7 +37,7 @@ uint my_pread(File Filedes, byte *Buffer, uint Count, my_off_t offset,
errno=0; /* Linux doesn't reset this */
#endif
#ifndef HAVE_PREAD
off_t old_offset;
os_off_t old_offset;
pthread_mutex_lock(&my_file_info[Filedes].mutex);
/*
@ -45,7 +45,7 @@ uint my_pread(File Filedes, byte *Buffer, uint Count, my_off_t offset,
before seeking to the given offset
*/
error= (old_offset= (off_t)lseek(Filedes, 0L, MY_SEEK_CUR)) == -1L ||
error= (old_offset= lseek(Filedes, 0L, MY_SEEK_CUR)) == -1L ||
lseek(Filedes, offset, MY_SEEK_SET) == -1L;
if (!error) /* Seek was successful */
@ -116,7 +116,7 @@ uint my_pwrite(int Filedes, const byte *Buffer, uint Count, my_off_t offset,
{
#ifndef HAVE_PREAD
int error= 0;
off_t old_offset;
os_off_t old_offset;
writenbytes= (uint) -1;
pthread_mutex_lock(&my_file_info[Filedes].mutex);
@ -124,7 +124,7 @@ uint my_pwrite(int Filedes, const byte *Buffer, uint Count, my_off_t offset,
As we cannot change the file pointer, we save the old position,
before seeking to the given offset
*/
error= ((old_offset= (off_t)lseek(Filedes, 0L, MY_SEEK_CUR)) == -1L ||
error= ((old_offset= lseek(Filedes, 0L, MY_SEEK_CUR)) == -1L ||
lseek(Filedes, offset, MY_SEEK_SET) == -1L);
if (!error) /* Seek was successful */