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Commit 4e1ec3bb authored by Anurag Shekhar's avatar Anurag Shekhar
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Bug#30102: Rename table does corrupt tables with partition files on failure 

Problem was that a failing rename just left the partitions at the state
it was at the failure.

Solution was to try to revert the started rename if a failure occured.
parent 99befb58
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mysql-test/r/partition_not_embedded.result 0 → 100644
View file @ 4e1ec3bb
DROP TABLE IF EXISTS t1, t2;
# Bug#30102 test
CREATE TABLE t1 (a INT)
PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (6),
PARTITION `p1....................` VALUES LESS THAN (9),
PARTITION p2 VALUES LESS THAN MAXVALUE);
# List of files in database `test`, all original t1-files here
t1#P#p0.MYD
t1#P#p0.MYI
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYD
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYI
t1#P#p2.MYD
t1#P#p2.MYI
t1.frm
t1.par
INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
# Renaming to a file name where the first partition is 250 chars
# and the second partition is 350 chars
RENAME TABLE t1 TO `t2_new..............................................end`;
Got one of the listed errors
# List of files in database `test`, should not be any t2-files here
# List of files in database `test`, should be all t1-files here
t1#P#p0.MYD
t1#P#p0.MYI
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYD
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYI
t1#P#p2.MYD
t1#P#p2.MYI
t1.frm
t1.par
SELECT * FROM t1;
a
1
10
2
3
4
5
6
7
8
9
# Renaming to a file name where the first partition is 155 chars
# and the second partition is 255 chars
RENAME TABLE t1 TO `t2_............................end`;
# List of files in database `test`, should not be any t1-files here
# List of files in database `test`, should be all t2-files here
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend#P#p0.MYD
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend#P#p0.MYI
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYD
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYI
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend#P#p2.MYD
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend#P#p2.MYI
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend.frm
t2_@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002eend.par
SELECT * FROM `t2_............................end`;
a
1
10
2
3
4
5
6
7
8
9
RENAME TABLE `t2_............................end` to t1;
# List of files in database `test`, should be all t1-files here
t1#P#p0.MYD
t1#P#p0.MYI
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYD
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYI
t1#P#p2.MYD
t1#P#p2.MYI
t1.frm
t1.par
# Renaming to a file name where the first partition is 156 chars
# and the second partition is 256 chars
RENAME TABLE t1 TO `t2_............................_end`;
Got one of the listed errors
# List of files in database `test`, should not be any t2-files here
# List of files in database `test`, should be all t1-files here
t1#P#p0.MYD
t1#P#p0.MYI
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYD
t1#P#p1@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e@002e.MYI
t1#P#p2.MYD
t1#P#p2.MYI
t1.frm
t1.par
SELECT * FROM t1;
a
1
10
2
3
4
5
6
7
8
9
DROP TABLE t1;
# Should not be any files left here
# End of bug#30102 test.
mysql-test/t/partition_not_embedded.test 0 → 100644
View file @ 4e1ec3bb
-- source include/have_partition.inc
-- source include/not_embedded.inc
--disable_warnings
DROP TABLE IF EXISTS t1, t2;
--enable_warnings
let $MYSQLD_DATADIR= `SELECT @@datadir`;
#
# Bug#30102: rename table does corrupt tables with partition files on failure
#
--echo # Bug#30102 test
CREATE TABLE t1 (a INT)
PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (6),
PARTITION `p1....................` VALUES LESS THAN (9),
PARTITION p2 VALUES LESS THAN MAXVALUE);
# partition p1 is 't1#P#p1' + @002e * 20 = 107 characters + file ending
# total path lenght of './test/t1#P#p1@002e@002e<...>@002e.MY[ID]' is 118 chars
--echo # List of files in database `test`, all original t1-files here
--list_files $MYSQLD_DATADIR/test t1*
INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
--echo # Renaming to a file name where the first partition is 250 chars
--echo # and the second partition is 350 chars
# 7,7 avoids the error message, which is not deterministic.
--error 7,7
RENAME TABLE t1 TO `t2_new..............................................end`;
# 1234567890123456789012345678901234567890123456
--echo # List of files in database `test`, should not be any t2-files here
--list_files $MYSQLD_DATADIR/test t2*
--echo # List of files in database `test`, should be all t1-files here
--list_files $MYSQLD_DATADIR/test t1*
--sorted_result
SELECT * FROM t1;
--echo # Renaming to a file name where the first partition is 155 chars
--echo # and the second partition is 255 chars
RENAME TABLE t1 TO `t2_............................end`;
# 1234567890123456789012345678
# t2_ + end
# .MY[ID] or .frm
# #P#p[012]
# 28 * @002e
# 6 + 4 + 5 + 28 * 5 = 155
--echo # List of files in database `test`, should not be any t1-files here
--list_files $MYSQLD_DATADIR/test t1*
--echo # List of files in database `test`, should be all t2-files here
--list_files $MYSQLD_DATADIR/test t2*
--sorted_result
SELECT * FROM `t2_............................end`;
RENAME TABLE `t2_............................end` to t1;
--echo # List of files in database `test`, should be all t1-files here
--list_files $MYSQLD_DATADIR/test t1*
--echo # Renaming to a file name where the first partition is 156 chars
--echo # and the second partition is 256 chars
# 7,7 avoids the error message, which is not deterministic.
--error 7,7
RENAME TABLE t1 TO `t2_............................_end`;
# 1234567890123456789012345678
# 7 + 4 + 5 + 28 * 5 = 16 + 140 = 156
--echo # List of files in database `test`, should not be any t2-files here
--list_files $MYSQLD_DATADIR/test t2*
--echo # List of files in database `test`, should be all t1-files here
--list_files $MYSQLD_DATADIR/test t1*
--sorted_result
SELECT * FROM t1;
DROP TABLE t1;
--echo # Should not be any files left here
--list_files $MYSQLD_DATADIR/test t1*
--list_files $MYSQLD_DATADIR/test t2*
--echo # End of bug#30102 test.
sql/ha_partition.cc
View file @ 4e1ec3bb
......@@ -423,12 +423,9 @@ bool ha_partition::initialize_partition(MEM_ROOT *mem_root)
int ha_partition::delete_table(const char *name)
{
int error;
DBUG_ENTER("ha_partition::delete_table");
if ((error= del_ren_cre_table(name, NULL, NULL, NULL)))
DBUG_RETURN(error);
DBUG_RETURN(handler::delete_table(name));
DBUG_RETURN(del_ren_cre_table(name, NULL, NULL, NULL));
}
......@@ -456,12 +453,9 @@ int ha_partition::delete_table(const char *name)
int ha_partition::rename_table(const char *from, const char *to)
{
int error;
DBUG_ENTER("ha_partition::rename_table");
if ((error= del_ren_cre_table(from, to, NULL, NULL)))
DBUG_RETURN(error);
DBUG_RETURN(handler::rename_table(from, to));
DBUG_RETURN(del_ren_cre_table(from, to, NULL, NULL));
}
......@@ -1807,6 +1801,15 @@ uint ha_partition::del_ren_cre_table(const char *from,
DBUG_PRINT("enter", ("from: (%s) to: (%s)", from, to));
name_buffer_ptr= m_name_buffer_ptr;
file= m_file;
if (to == NULL && table_arg == NULL)
{
/*
Delete table, start by delete the .par file. If error, break, otherwise
delete as much as possible.
*/
if ((error= handler::delete_table(from)))
DBUG_RETURN(error);
}
/*
Since ha_partition has HA_FILE_BASED, it must alter underlying table names
if they do not have HA_FILE_BASED and lower_case_table_names == 2.
......@@ -1828,6 +1831,8 @@ uint ha_partition::del_ren_cre_table(const char *from,
create_partition_name(to_buff, to_path, name_buffer_ptr,
NORMAL_PART_NAME, FALSE);
error= (*file)->ha_rename_table(from_buff, to_buff);
if (error)
goto rename_error;
}
else if (table_arg == NULL) // delete branch
error= (*file)->ha_delete_table(from_buff);
......@@ -1843,6 +1848,15 @@ uint ha_partition::del_ren_cre_table(const char *from,
save_error= error;
i++;
} while (*(++file));
if (to != NULL)
{
if ((error= handler::rename_table(from, to)))
{
/* Try to revert everything, ignore errors */
(void) handler::rename_table(to, from);
goto rename_error;
}
}
DBUG_RETURN(save_error);
create_error:
name_buffer_ptr= m_name_buffer_ptr;
......@@ -1850,7 +1864,21 @@ create_error:
{
create_partition_name(from_buff, from_path, name_buffer_ptr, NORMAL_PART_NAME,
FALSE);
VOID((*file)->ha_delete_table((const char*) from_buff));
(void) (*file)->ha_delete_table((const char*) from_buff);
name_buffer_ptr= strend(name_buffer_ptr) + 1;
}
DBUG_RETURN(error);
rename_error:
name_buffer_ptr= m_name_buffer_ptr;
for (abort_file= file, file= m_file; file < abort_file; file++)
{
/* Revert the rename, back from 'to' to the original 'from' */
create_partition_name(from_buff, from_path, name_buffer_ptr,
NORMAL_PART_NAME, FALSE);
create_partition_name(to_buff, to_path, name_buffer_ptr,
NORMAL_PART_NAME, FALSE);
/* Ignore error here */
(void) (*file)->ha_rename_table(to_buff, from_buff);
name_buffer_ptr= strend(name_buffer_ptr) + 1;
}
DBUG_RETURN(error);
......
sql/handler.cc
View file @ 4e1ec3bb
......@@ -2973,6 +2973,7 @@ uint handler::get_dup_key(int error)
*/
int handler::delete_table(const char *name)
{
int saved_error= 0;
int error= 0;
int enoent_or_zero= ENOENT; // Error if no file was deleted
char buff[FN_REFLEN];
......@@ -2982,21 +2983,31 @@ int handler::delete_table(const char *name)
fn_format(buff, name, "", *ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
if (my_delete_with_symlink(buff, MYF(0)))
{
if ((error= my_errno) != ENOENT)
break;
if (my_errno != ENOENT)
{
/*
If error on the first existing file, return the error.
Otherwise delete as much as possible.
*/
if (enoent_or_zero)
return my_errno;
saved_error= my_errno;
}
}
else
enoent_or_zero= 0; // No error for ENOENT
error= enoent_or_zero;
}
return error;
return saved_error ? saved_error : error;
}
int handler::rename_table(const char * from, const char * to)
{
int error= 0;
for (const char **ext= bas_ext(); *ext ; ext++)
const char **ext, **start_ext;
start_ext= bas_ext();
for (ext= start_ext; *ext ; ext++)
{
if (rename_file_ext(from, to, *ext))
{
......@@ -3005,6 +3016,12 @@ int handler::rename_table(const char * from, const char * to)
error= 0;
}
}
if (error)
{
/* Try to revert the rename. Ignore errors. */
for (; ext >= start_ext; ext--)
rename_file_ext(to, from, *ext);
}
return error;
}
......
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