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Automerge.

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This commit is contained in:
Alexey Kopytov 2009-07-12 20:56:43 +06:00
commit 606e5bf699
5 changed files with 52 additions and 8 deletions
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3
include/myisammrg.h
View File

@ -88,7 +88,8 @@ extern MYRG_INFO *myrg_parent_open(const char *parent_name,
void *callback_param);
extern int myrg_attach_children(MYRG_INFO *m_info, int handle_locking,
MI_INFO *(*callback)(void*),
void *callback_param);
void *callback_param,
my_bool *need_compat_check);
extern int myrg_detach_children(MYRG_INFO *m_info);
extern int myrg_panic(enum ha_panic_function function);
extern int myrg_rfirst(MYRG_INFO *file,uchar *buf,int inx);

14
mysql-test/r/merge.result
View File

@ -2127,4 +2127,18 @@ SELECT * FROM m1;
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
DROP VIEW v1;
DROP TABLE m1, t1;
#
# Bug #45796: invalid memory reads and writes when altering merge and
# base tables
#
CREATE TABLE t1(c1 INT) ENGINE=MyISAM;
CREATE TABLE m1(c1 INT) ENGINE=MERGE UNION=(t1);
ALTER TABLE m1 ADD INDEX idx_c1(c1);
SELECT * FROM m1;
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
ALTER TABLE t1 ADD INDEX idx_c1(c1);
SELECT * FROM m1;
c1
DROP TABLE m1;
DROP TABLE t1;
End of 5.1 tests

20
mysql-test/t/merge.test
View File

@ -1535,4 +1535,24 @@ SELECT * FROM m1;
DROP VIEW v1;
DROP TABLE m1, t1;
--echo #
--echo # Bug #45796: invalid memory reads and writes when altering merge and
--echo # base tables
--echo #
CREATE TABLE t1(c1 INT) ENGINE=MyISAM;
CREATE TABLE m1(c1 INT) ENGINE=MERGE UNION=(t1);
ALTER TABLE m1 ADD INDEX idx_c1(c1);
# Open the MERGE table and allocate buffers based on children's definition.
--error ER_WRONG_MRG_TABLE
SELECT * FROM m1;
# Change the child table definition.
ALTER TABLE t1 ADD INDEX idx_c1(c1);
# Check that old buffers are not reused
SELECT * FROM m1;
DROP TABLE m1;
DROP TABLE t1;
--echo End of 5.1 tests

3
storage/myisammrg/ha_myisammrg.cc
View File

@ -545,7 +545,8 @@ int ha_myisammrg::attach_children(void)
if (myrg_attach_children(this->file, this->test_if_locked |
current_thd->open_options,
myisammrg_attach_children_callback, this))
myisammrg_attach_children_callback, this,
(my_bool *) &need_compat_check))
{
DBUG_PRINT("error", ("my_errno %d", my_errno));
DBUG_RETURN(my_errno ? my_errno : -1);

20
storage/myisammrg/myrg_open.c
View File

@ -365,11 +365,14 @@ MYRG_INFO *myrg_parent_open(const char *parent_name,
The callback returns the MyISAM table handle of the child table.
Check table definition match.
@param[in] m_info MERGE parent table structure
@param[in] handle_locking if contains HA_OPEN_FOR_REPAIR, warn about
incompatible child tables, but continue
@param[in] callback function to call for each child table
@param[in] callback_param data pointer to give to the callback
@param[in] m_info MERGE parent table structure
@param[in] handle_locking if contains HA_OPEN_FOR_REPAIR, warn about
incompatible child tables, but continue
@param[in] callback function to call for each child table
@param[in] callback_param data pointer to give to the callback
@param[in] need_compat_check pointer to ha_myisammrg::need_compat_check
(we need this one to decide if previously
allocated buffers can be reused).
@return status
@retval 0 OK
@ -382,7 +385,7 @@ MYRG_INFO *myrg_parent_open(const char *parent_name,
int myrg_attach_children(MYRG_INFO *m_info, int handle_locking,
MI_INFO *(*callback)(void*),
void *callback_param)
void *callback_param, my_bool *need_compat_check)
{
ulonglong file_offset;
MI_INFO *myisam;
@ -423,6 +426,11 @@ int myrg_attach_children(MYRG_INFO *m_info, int handle_locking,
m_info->reclength= myisam->s->base.reclength;
min_keys= myisam->s->base.keys;
key_parts= myisam->s->base.key_parts;
if (*need_compat_check && m_info->rec_per_key_part)
{
my_free((char *) m_info->rec_per_key_part, MYF(0));
m_info->rec_per_key_part= NULL;
}
if (!m_info->rec_per_key_part)
{
if(!(m_info->rec_per_key_part= (ulong*)