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Merge gleb.loc:/home/uchum/work/bk/mysql-5.0-opt

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into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt-28716
This commit is contained in:
gshchepa/uchum@gleb.loc 2007-05-30 14:34:52 +05:00
commit 0362400f31
4 changed files with 150 additions and 29 deletions
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17
mysql-test/r/view.result
View file

@ -3367,6 +3367,23 @@ SHOW CREATE VIEW v1;
View Create View
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select cast(1.23456789 as decimal(8,0)) AS `col`
DROP VIEW v1;
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (b INT, c INT DEFAULT 0);
INSERT INTO t1 (a) VALUES (1), (2);
INSERT INTO t2 (b) VALUES (1), (2);
CREATE VIEW v1 AS SELECT t2.b,t2.c FROM t1, t2
WHERE t1.a=t2.b AND t2.b < 3 WITH CHECK OPTION;
SELECT * FROM v1;
b c
1 0
2 0
UPDATE v1 SET c=1 WHERE b=1;
SELECT * FROM v1;
b c
1 1
2 0
DROP VIEW v1;
DROP TABLE t1,t2;
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int, c int DEFAULT 0);
INSERT INTO t1 (id) VALUES (1);

16
mysql-test/t/view.test
View file

@ -3233,6 +3233,22 @@ CREATE VIEW v1 AS SELECT CAST(1.23456789 AS DECIMAL(8,0)) AS col;
SHOW CREATE VIEW v1;
DROP VIEW v1;
#
# Bug #28716: CHECK OPTION expression is evaluated over expired record buffers
# when VIEW is updated via temporary tables
#
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (b INT, c INT DEFAULT 0);
INSERT INTO t1 (a) VALUES (1), (2);
INSERT INTO t2 (b) VALUES (1), (2);
CREATE VIEW v1 AS SELECT t2.b,t2.c FROM t1, t2
WHERE t1.a=t2.b AND t2.b < 3 WITH CHECK OPTION;
SELECT * FROM v1;
UPDATE v1 SET c=1 WHERE b=1;
SELECT * FROM v1;
DROP VIEW v1;
DROP TABLE t1,t2;
#
# Bug #28561: update on multi-table view with CHECK OPTION and
# a subquery in WHERE condition

5
sql/sql_class.h
View file

@ -2283,6 +2283,11 @@ class multi_update :public select_result_interceptor
List <Item> *fields, *values;
List <Item> **fields_for_table, **values_for_table;
uint table_count;
/*
List of tables referenced in the CHECK OPTION condition of
the updated view excluding the updated table.
*/
List <TABLE> unupdated_check_opt_tables;
Copy_field *copy_field;
enum enum_duplicates handle_duplicates;
bool do_update, trans_safe;

141
sql/sql_update.cc
View file

@ -970,6 +970,7 @@ int multi_update::prepare(List<Item> &not_used_values,
List_iterator_fast<Item> field_it(*fields);
List_iterator_fast<Item> value_it(*values);
uint i, max_fields;
uint leaf_table_count= 0;
DBUG_ENTER("multi_update::prepare");
thd->count_cuted_fields= CHECK_FIELD_WARN;
@ -1003,6 +1004,7 @@ int multi_update::prepare(List<Item> &not_used_values,
{
/* TODO: add support of view of join support */
TABLE *table=table_ref->table;
leaf_table_count++;
if (tables_to_update & table->map)
{
TABLE_LIST *tl= (TABLE_LIST*) thd->memdup((char*) table_ref,
@ -1067,7 +1069,7 @@ int multi_update::prepare(List<Item> &not_used_values,
/* Allocate copy fields */
max_fields=0;
for (i=0 ; i < table_count ; i++)
set_if_bigger(max_fields, fields_for_table[i]->elements);
set_if_bigger(max_fields, fields_for_table[i]->elements + leaf_table_count);
copy_field= new Copy_field[max_fields];
DBUG_RETURN(thd->is_fatal_error != 0);
}
@ -1160,13 +1162,22 @@ multi_update::initialize_tables(JOIN *join)
trans_safe= transactional_tables= main_table->file->has_transactions();
table_to_update= 0;
/* Any update has at least one pair (field, value) */
DBUG_ASSERT(fields->elements);
/*
Only one table may be modified by UPDATE of an updatable view.
For an updatable view first_table_for_update indicates this
table.
For a regular multi-update it refers to some updated table.
*/
TABLE *first_table_for_update= ((Item_field *) fields->head())->field->table;
/* Create a temporary table for keys to all tables, except main table */
for (table_ref= update_tables; table_ref; table_ref= table_ref->next_local)
{
TABLE *table=table_ref->table;
uint cnt= table_ref->shared;
Item_field *ifield;
List<Item> temp_fields= *fields_for_table[cnt];
List<Item> temp_fields;
ORDER group;
if (ignore)
@ -1174,34 +1185,63 @@ multi_update::initialize_tables(JOIN *join)
if (table == main_table) // First table in join
{
if (safe_update_on_fly(thd, join->join_tab, table_ref, all_tables,
&temp_fields))
fields_for_table[cnt]))
{
table_to_update= main_table; // Update table on the fly
continue;
}
}
if (table == first_table_for_update && table_ref->check_option)
{
table_map unupdated_tables= table_ref->check_option->used_tables() &
~first_table_for_update->map;
for (TABLE_LIST *tbl_ref =leaves;
unupdated_tables && tbl_ref;
tbl_ref= tbl_ref->next_leaf)
{
if (unupdated_tables & tbl_ref->table->map)
unupdated_tables&= ~tbl_ref->table->map;
else
continue;
if (unupdated_check_opt_tables.push_back(tbl_ref->table))
DBUG_RETURN(1);
}
}
TMP_TABLE_PARAM *tmp_param= tmp_table_param+cnt;
/*
Create a temporary table to store all fields that are changed for this
table. The first field in the temporary table is a pointer to the
original row so that we can find and update it
original row so that we can find and update it. For the updatable
VIEW a few following fields are rowids of tables used in the CHECK
OPTION condition.
*/
/* ok to be on stack as this is not referenced outside of this func */
Field_string offset(table->file->ref_length, 0, "offset",
table, &my_charset_bin);
/*
The field will be converted to varstring when creating tmp table if
table to be updated was created by mysql 4.1. Deny this.
*/
offset.can_alter_field_type= 0;
if (!(ifield= new Item_field(((Field *) &offset))))
DBUG_RETURN(1);
ifield->maybe_null= 0;
if (temp_fields.push_front(ifield))
DBUG_RETURN(1);
List_iterator_fast<TABLE> tbl_it(unupdated_check_opt_tables);
TABLE *tbl= table;
do
{
Field_string *field= new Field_string(tbl->file->ref_length, 0,
tbl->alias,
tbl, &my_charset_bin);
if (!field)
DBUG_RETURN(1);
/*
The field will be converted to varstring when creating tmp table if
table to be updated was created by mysql 4.1. Deny this.
*/
field->can_alter_field_type= 0;
Item_field *ifield= new Item_field((Field *) field);
if (!ifield)
DBUG_RETURN(1);
ifield->maybe_null= 0;
if (temp_fields.push_back(ifield))
DBUG_RETURN(1);
} while ((tbl= tbl_it++));
temp_fields.concat(fields_for_table[cnt]);
/* Make an unique key over the first field to avoid duplicated updates */
bzero((char*) &group, sizeof(group));
@ -1350,10 +1390,26 @@ bool multi_update::send_data(List<Item> &not_used_values)
{
int error;
TABLE *tmp_table= tmp_tables[offset];
fill_record(thd, tmp_table->field+1, *values_for_table[offset], 1);
/* Store pointer to row */
memcpy((char*) tmp_table->field[0]->ptr,
(char*) table->file->ref, table->file->ref_length);
/* Store regular updated fields in the row. */
fill_record(thd,
tmp_table->field + 1 + unupdated_check_opt_tables.elements,
*values_for_table[offset], 1);
/*
For updatable VIEW store rowid of the updated table and
rowids of tables used in the CHECK OPTION condition.
*/
uint field_num= 0;
List_iterator_fast<TABLE> tbl_it(unupdated_check_opt_tables);
TABLE *tbl= table;
do
{
if (tbl != table)
tbl->file->position(tbl->record[0]);
memcpy((char*) tmp_table->field[field_num]->ptr,
(char*) tbl->file->ref, tbl->file->ref_length);
field_num++;
} while ((tbl= tbl_it++));
/* Write row, ignoring duplicated updates to a row */
error= tmp_table->file->write_row(tmp_table->record[0]);
if (error != HA_ERR_FOUND_DUPP_KEY && error != HA_ERR_FOUND_DUPP_UNIQUE)
@ -1403,9 +1459,10 @@ void multi_update::send_error(uint errcode,const char *err)
int multi_update::do_updates(bool from_send_error)
{
TABLE_LIST *cur_table;
int local_error;
int local_error= 0;
ha_rows org_updated;
TABLE *table, *tmp_table;
List_iterator_fast<TABLE> check_opt_it(unupdated_check_opt_tables);
DBUG_ENTER("do_updates");
do_update= 0; // Don't retry this function
@ -1413,8 +1470,8 @@ int multi_update::do_updates(bool from_send_error)
DBUG_RETURN(0);
for (cur_table= update_tables; cur_table; cur_table= cur_table->next_local)
{
byte *ref_pos;
bool can_compare_record;
uint offset= cur_table->shared;
table = cur_table->table;
if (table == table_to_update)
@ -1425,11 +1482,20 @@ int multi_update::do_updates(bool from_send_error)
(void) table->file->ha_rnd_init(0);
table->file->extra(HA_EXTRA_NO_CACHE);
check_opt_it.rewind();
while(TABLE *tbl= check_opt_it++)
{
if (tbl->file->ha_rnd_init(1))
goto err;
tbl->file->extra(HA_EXTRA_CACHE);
}
/*
Setup copy functions to copy fields from temporary table
*/
List_iterator_fast<Item> field_it(*fields_for_table[cur_table->shared]);
Field **field= tmp_table->field+1; // Skip row pointer
List_iterator_fast<Item> field_it(*fields_for_table[offset]);
Field **field= tmp_table->field +
1 + unupdated_check_opt_tables.elements; // Skip row pointers
Copy_field *copy_field_ptr= copy_field, *copy_field_end;
for ( ; *field ; field++)
{
@ -1444,7 +1510,6 @@ int multi_update::do_updates(bool from_send_error)
can_compare_record= !(table->file->table_flags() &
HA_PARTIAL_COLUMN_READ);
ref_pos= (byte*) tmp_table->field[0]->ptr;
for (;;)
{
if (thd->killed && trans_safe)
@ -1457,8 +1522,19 @@ int multi_update::do_updates(bool from_send_error)
continue; // May happen on dup key
goto err;
}
if ((local_error= table->file->rnd_pos(table->record[0], ref_pos)))
goto err;
/* call rnd_pos() using rowids from temporary table */
check_opt_it.rewind();
TABLE *tbl= table;
uint field_num= 0;
do
{
if((local_error= tbl->file->rnd_pos(tbl->record[0],
tmp_table->field[field_num]->ptr)))
goto err;
field_num++;
} while((tbl= check_opt_it++));
table->status|= STATUS_UPDATED;
store_record(table,record[1]);
@ -1508,6 +1584,10 @@ int multi_update::do_updates(bool from_send_error)
}
(void) table->file->ha_rnd_end();
(void) tmp_table->file->ha_rnd_end();
check_opt_it.rewind();
while (TABLE *tbl= check_opt_it++)
tbl->file->ha_rnd_end();
}
DBUG_RETURN(0);
@ -1521,6 +1601,9 @@ err:
err2:
(void) table->file->ha_rnd_end();
(void) tmp_table->file->ha_rnd_end();
check_opt_it.rewind();
while (TABLE *tbl= check_opt_it++)
tbl->file->ha_rnd_end();
if (updated != org_updated)
{