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Fix for bug#18437 "Wrong values inserted with a before update trigger on

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NDB table".

SQL-layer was not marking fields which were used in triggers as such. As
result these fields were not always properly retrieved/stored by handler
layer. So one might got wrong values or lost changes in triggers for NDB,
Federated and possibly InnoDB tables.
This fix solves the problem by marking fields used in triggers
appropriately.

Also this patch contains the following cleanup of ha_ndbcluster code:

We no longer rely on reading LEX::sql_command value in handler in order
to determine if we can enable optimization which allows us to handle REPLACE
statement in more efficient way by doing replaces directly in write_row()
method without reporting error to SQL-layer.
Instead we rely on SQL-layer informing us whether this optimization
applicable by calling handler::extra() method with
HA_EXTRA_WRITE_CAN_REPLACE flag.
As result we no longer apply this optimzation in cases when it should not
be used (e.g. if we have on delete triggers on table) and use in some
additional cases when it is applicable (e.g. for LOAD DATA REPLACE).

Finally this patch includes fix for bug#20728 "REPLACE does not work
correctly for NDB table with PK and unique index".
  
This was yet another problem which was caused by improper field mark-up.
During row replacement fields which weren't explicity used in REPLACE
statement were not marked as fields to be saved (updated) so they have
retained values from old row version. The fix is to mark all table
fields as set for REPLACE statement. Note that in 5.1 we already solve
this problem by notifying handler that it should save values from all
fields only in case when real replacement happens.


include/my_base.h:
  Added HA_EXTRA_WRITE_CAN_REPLACE, HA_EXTRA_WRITE_CANNOT_REPLACE - new
  parameters for ha_extra() method. We use them to inform handler that
  write_row() which tries to insert new row into the table and encounters
  some already existing row with same primary/unique key can replace old
  row with new row instead of reporting error.
mysql-test/r/federated.result:
  Additional test for bug#18437 "Wrong values inserted with a before update
  trigger on NDB table".
mysql-test/r/ndb_replace.result:
  Added test for bug #20728 "REPLACE does not work correctly for NDB table
  with PK and unique index". Updated wrong results from older test.
mysql-test/t/federated.test:
  Additional test for bug#18437 "Wrong values inserted with a before update
  trigger on NDB table".
mysql-test/t/ndb_replace.test:
  Added test for bug #20728 "REPLACE does not work correctly for NDB table
  with PK and unique index".
sql/ha_ndbcluster.cc:
  We no longer rely on reading LEX::sql_command value in handler in order
  to determine if we can enable optimization which allows us to handle REPLACE
  statement in more efficient way by doing replaces directly in write_row()
  method without reporting error to SQL-layer.
  Instead we rely on SQL-layer informing us whether this optimization
  applicable by calling handler::extra() method with
  HA_EXTRA_WRITE_CAN_REPLACE flag.
  As result we no longer apply this optimization in cases when it should not
  be used (e.g. if we have on delete triggers on table) and use in some
  additional cases when it is applicable (e.g. for LOAD DATA REPLACE).
sql/item.cc:
  Item_trigger_field::setup_field():
    Added comment explaining why we don't set Field::query_id in this method.
sql/mysql_priv.h:
  mysql_alter_table() function no longer takes handle_duplicates argument.
  Added declaration of mark_fields_used_by_triggers_for_insert_stmt() function.
sql/sql_delete.cc:
  Mark fields which are used by ON DELETE triggers so handler will retrieve
  values for these fields.
sql/sql_insert.cc:
  Explicitly inform handler that we are doing REPLACE (using ha_extra() method)
  in cases when it can promote insert operation done by write_row() to replace.
  Also when we do REPLACE we want to store values for all columns so we should
  inform handler about it.
  Finally we should mark fields used by ON UPDATE/ON DELETE triggers as such
  so handler can properly retrieve/restore values in these fields during
  execution of REPLACE and INSERT ... ON DUPLICATE KEY UPDATE statements.
sql/sql_load.cc:
  Explicitly inform handler that we are doing LOAD DATA REPLACE (using
  ha_extra() method) in cases when it can promote insert operation done by
  write_row() to replace.
  Also when we do replace we want to save (replace) values for all columns
  so we should inform handler about it.
  Finally to properly execute LOAD DATA for table with triggers we should
  mark fields used by ON INSERT triggers as such so handler can properly
  store values for these fields.
sql/sql_parse.cc:
  mysql_alter_table() function no longer takes handle_duplicates argument.
sql/sql_table.cc:
  Got rid of handle_duplicates argument in mysql_alter_table() and
  copy_data_between_tables() functions. These functions were always
  called with handle_duplicates == DUP_ERROR and thus contained dead
  (and probably incorrect) code.
sql/sql_trigger.cc:
  Added Table_triggers_list::mark_fields_used() method which is used to mark
  fields read/set by triggers as such so handlers will be able properly
  retrieve/store values in these fields.
sql/sql_trigger.h:
  Table_triggers_list:
    Added mark_fields_used() method which is used to mark fields read/set by
    triggers as such so handlers will be able properly retrieve/store values
    in these fields. To implement this method added 'trigger_fields' member
    which is array of lists linking items for all fields used in triggers
    grouped by event and action time.
sql/sql_update.cc:
  Mark fields which are used by ON UPDATE triggers so handler will retrieve
  and save values for these fields.
mysql-test/r/ndb_trigger.result:
  Added test for bug#18437 "Wrong values inserted with a before update trigger
  on NDB table".
mysql-test/t/ndb_trigger.test:
  Added test for bug#18437 "Wrong values inserted with a before update trigger
  on NDB table".
This commit is contained in:
unknown 2006-07-02 01:51:10 +04:00
parent 9d7799e7a8
commit ae9724cce1
18 changed files with 556 additions and 39 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
include/my_base.h
View file

@ -152,7 +152,16 @@ enum ha_extra_function {
other fields intact. When this is off (by default) InnoDB will use memcpy
to overwrite entire row.
*/
HA_EXTRA_KEYREAD_PRESERVE_FIELDS
HA_EXTRA_KEYREAD_PRESERVE_FIELDS,
/*
Informs handler that write_row() which tries to insert new row into the
table and encounters some already existing row with same primary/unique
key can replace old row with new row instead of reporting error (basically
it informs handler that we do REPLACE instead of simple INSERT).
Off by default.
*/
HA_EXTRA_WRITE_CAN_REPLACE,
HA_EXTRA_WRITE_CANNOT_REPLACE
};
/* The following is parameter to ha_panic() */

28
mysql-test/r/federated.result
View file

@ -1601,6 +1601,34 @@ fld_cid fld_name fld_parentid fld_delt
5 Torkel 0 0
DROP TABLE federated.t1;
DROP TABLE federated.bug_17377_table;
drop table if exists federated.t1;
create table federated.t1 (a int, b int, c int);
drop table if exists federated.t1;
drop table if exists federated.t2;
create table federated.t1 (a int, b int, c int) engine=federated connection='mysql://root@127.0.0.1:SLAVE_PORT/federated/t1';
create trigger federated.t1_bi before insert on federated.t1 for each row set new.c= new.a * new.b;
create table federated.t2 (a int, b int);
insert into federated.t2 values (13, 17), (19, 23);
insert into federated.t1 (a, b) values (1, 2), (3, 5), (7, 11);
select * from federated.t1;
a b c
1 2 2
3 5 15
7 11 77
delete from federated.t1;
insert into federated.t1 (a, b) select * from federated.t2;
select * from federated.t1;
a b c
13 17 221
19 23 437
delete from federated.t1;
load data infile '../std_data_ln/loaddata5.dat' into table federated.t1 fields terminated by '' enclosed by '' ignore 1 lines (a, b);
select * from federated.t1;
a b c
3 4 12
5 6 30
drop tables federated.t1, federated.t2;
drop table federated.t1;
DROP TABLE IF EXISTS federated.t1;
DROP DATABASE IF EXISTS federated;
DROP TABLE IF EXISTS federated.t1;

47
mysql-test/r/ndb_replace.result
View file

@ -30,7 +30,8 @@ REPLACE INTO t1 (i,j) VALUES (17,2);
SELECT * from t1 ORDER BY i;
i j k
3 1 42
17 2 24
17 2 NULL
DROP TABLE t1;
CREATE TABLE t2 (a INT(11) NOT NULL,
b INT(11) NOT NULL,
c INT(11) NOT NULL,
@ -52,3 +53,47 @@ SELECT * FROM t2 ORDER BY id;
a b c x y z id i
1 1 1 b b b 5 2
DROP TABLE t2;
drop table if exists t1;
create table t1 (pk int primary key, apk int unique, data int) engine=ndbcluster;
insert into t1 values (1, 1, 1), (2, 2, 2), (3, 3, 3);
replace into t1 (pk, apk) values (4, 1), (5, 2);
select * from t1 order by pk;
pk apk data
3 3 3
4 1 NULL
5 2 NULL
delete from t1;
insert into t1 values (1, 1, 1), (2, 2, 2), (3, 3, 3);
replace into t1 (pk, apk) values (1, 4), (2, 5);
select * from t1 order by pk;
pk apk data
1 4 NULL
2 5 NULL
3 3 3
delete from t1;
insert into t1 values (1, 1, 1), (4, 4, 4), (6, 6, 6);
load data infile '../std_data_ln/loaddata5.dat' replace into table t1 fields terminated by '' enclosed by '' ignore 1 lines (pk, apk);
select * from t1 order by pk;
pk apk data
1 1 1
3 4 NULL
5 6 NULL
delete from t1;
insert into t1 values (1, 1, 1), (3, 3, 3), (5, 5, 5);
load data infile '../std_data_ln/loaddata5.dat' replace into table t1 fields terminated by '' enclosed by '' ignore 1 lines (pk, apk);
select * from t1 order by pk;
pk apk data
1 1 1
3 4 NULL
5 6 NULL
delete from t1;
insert into t1 values (1, 1, 1), (2, 2, 2), (3, 3, 3);
replace into t1 (pk, apk) select 4, 1;
replace into t1 (pk, apk) select 2, 4;
select * from t1 order by pk;
pk apk data
2 4 NULL
3 3 3
4 1 NULL
drop table t1;
End of 5.0 tests.

119
mysql-test/r/ndb_trigger.result Normal file
View file

@ -0,0 +1,119 @@
drop table if exists t1, t2, t3;
create table t1 (id int primary key, a int not null, b decimal (63,30) default 0) engine=ndb;
create table t2 (op char(1), a int not null, b decimal (63,30));
create table t3 select 1 as i;
create trigger t1_bu before update on t1 for each row
begin
insert into t2 values ("u", old.a, old.b);
set new.b = old.b + 10;
end;//
create trigger t1_bd before delete on t1 for each row
begin
insert into t2 values ("d", old.a, old.b);
end;//
insert into t1 values (1, 1, 1.05), (2, 2, 2.05), (3, 3, 3.05), (4, 4, 4.05);
update t1 set a=5 where a != 3;
select * from t1 order by id;
id a b
1 5 11.050000000000000000000000000000
2 5 12.050000000000000000000000000000
3 3 3.050000000000000000000000000000
4 5 14.050000000000000000000000000000
select * from t2 order by op, a, b;
op a b
u 1 1.050000000000000000000000000000
u 2 2.050000000000000000000000000000
u 4 4.050000000000000000000000000000
delete from t2;
update t1, t3 set a=6 where a = 5;
select * from t1 order by id;
id a b
1 6 21.050000000000000000000000000000
2 6 22.050000000000000000000000000000
3 3 3.050000000000000000000000000000
4 6 24.050000000000000000000000000000
select * from t2 order by op, a, b;
op a b
u 5 11.050000000000000000000000000000
u 5 12.050000000000000000000000000000
u 5 14.050000000000000000000000000000
delete from t2;
delete from t1 where a != 3;
select * from t1 order by id;
id a b
3 3 3.050000000000000000000000000000
select * from t2 order by op, a, b;
op a b
d 6 21.050000000000000000000000000000
d 6 22.050000000000000000000000000000
d 6 24.050000000000000000000000000000
delete from t2;
insert into t1 values (1, 1, 1.05), (2, 2, 2.05), (4, 4, 4.05);
delete t1 from t1, t3 where a != 3;
select * from t1 order by id;
id a b
3 3 3.050000000000000000000000000000
select * from t2 order by op, a, b;
op a b
d 1 1.050000000000000000000000000000
d 2 2.050000000000000000000000000000
d 4 4.050000000000000000000000000000
delete from t2;
insert into t1 values (4, 4, 4.05);
insert into t1 (id, a) values (4, 1), (3, 1) on duplicate key update a= a + 1;
select * from t1 order by id;
id a b
3 4 13.050000000000000000000000000000
4 5 14.050000000000000000000000000000
select * from t2 order by op, a, b;
op a b
u 3 3.050000000000000000000000000000
u 4 4.050000000000000000000000000000
delete from t2;
delete from t3;
insert into t3 values (4), (3);
insert into t1 (id, a) (select i, 1 from t3) on duplicate key update a= a + 1;
select * from t1 order by id;
id a b
3 5 23.050000000000000000000000000000
4 6 24.050000000000000000000000000000
select * from t2 order by op, a, b;
op a b
u 4 13.050000000000000000000000000000
u 5 14.050000000000000000000000000000
delete from t2;
replace into t1 (id, a) values (4, 1), (3, 1);
select * from t1 order by id;
id a b
3 1 0.000000000000000000000000000000
4 1 0.000000000000000000000000000000
select * from t2 order by op, a, b;
op a b
d 5 23.050000000000000000000000000000
d 6 24.050000000000000000000000000000
delete from t1;
delete from t2;
insert into t1 values (3, 1, 1.05), (4, 1, 2.05);
replace into t1 (id, a) (select i, 2 from t3);
select * from t1 order by id;
id a b
3 2 0.000000000000000000000000000000
4 2 0.000000000000000000000000000000
select * from t2 order by op, a, b;
op a b
d 1 1.050000000000000000000000000000
d 1 2.050000000000000000000000000000
delete from t1;
delete from t2;
insert into t1 values (3, 1, 1.05), (5, 2, 2.05);
load data infile '../std_data_ln/loaddata5.dat' replace into table t1 fields terminated by '' enclosed by '' ignore 1 lines (id, a);
select * from t1 order by id;
id a b
3 4 0.000000000000000000000000000000
5 6 0.000000000000000000000000000000
select * from t2 order by op, a, b;
op a b
d 1 1.050000000000000000000000000000
d 2 2.050000000000000000000000000000
drop tables t1, t2, t3;
End of 5.0 tests

42
mysql-test/t/federated.test
View file

@ -1310,4 +1310,46 @@ connection slave;
DROP TABLE federated.bug_17377_table;
#
# Additional test for bug#18437 "Wrong values inserted with a before
# update trigger on NDB table". SQL-layer didn't properly inform
# handler about fields which were read and set in triggers. In some
# cases this resulted in incorrect (garbage) values of OLD variables
# and lost changes to NEW variables.
# Since for federated engine only operation which is affected by wrong
# fields mark-up is handler::write_row() this file constains coverage
# for ON INSERT triggers only. Tests for other types of triggers reside
# in ndb_trigger.test.
#
--disable_warnings
drop table if exists federated.t1;
--enable_warnings
create table federated.t1 (a int, b int, c int);
connection master;
--disable_warnings
drop table if exists federated.t1;
drop table if exists federated.t2;
--enable_warnings
--replace_result $SLAVE_MYPORT SLAVE_PORT
eval create table federated.t1 (a int, b int, c int) engine=federated connection='mysql://root@127.0.0.1:$SLAVE_MYPORT/federated/t1';
create trigger federated.t1_bi before insert on federated.t1 for each row set new.c= new.a * new.b;
create table federated.t2 (a int, b int);
insert into federated.t2 values (13, 17), (19, 23);
# Each of three statements should correctly set values for all three fields
# insert
insert into federated.t1 (a, b) values (1, 2), (3, 5), (7, 11);
select * from federated.t1;
delete from federated.t1;
# insert ... select
insert into federated.t1 (a, b) select * from federated.t2;
select * from federated.t1;
delete from federated.t1;
# load
load data infile '../std_data_ln/loaddata5.dat' into table federated.t1 fields terminated by '' enclosed by '' ignore 1 lines (a, b);
select * from federated.t1;
drop tables federated.t1, federated.t2;
connection slave;
drop table federated.t1;
source include/federated_cleanup.inc;

37
mysql-test/t/ndb_replace.test
View file

@ -39,6 +39,7 @@ INSERT INTO t1 VALUES (1,1,23),(2,2,24);
REPLACE INTO t1 (j,k) VALUES (1,42);
REPLACE INTO t1 (i,j) VALUES (17,2);
SELECT * from t1 ORDER BY i;
DROP TABLE t1;
# bug#19906
CREATE TABLE t2 (a INT(11) NOT NULL,
@ -64,4 +65,40 @@ SELECT * FROM t2 ORDER BY id;
DROP TABLE t2;
#
# Bug #20728 "REPLACE does not work correctly for NDB table with PK and
# unique index"
#
--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (pk int primary key, apk int unique, data int) engine=ndbcluster;
# Test for plain replace which updates pk
insert into t1 values (1, 1, 1), (2, 2, 2), (3, 3, 3);
replace into t1 (pk, apk) values (4, 1), (5, 2);
select * from t1 order by pk;
delete from t1;
# Another test for plain replace which doesn't touch pk
insert into t1 values (1, 1, 1), (2, 2, 2), (3, 3, 3);
replace into t1 (pk, apk) values (1, 4), (2, 5);
select * from t1 order by pk;
delete from t1;
# Test for load data replace which updates pk
insert into t1 values (1, 1, 1), (4, 4, 4), (6, 6, 6);
load data infile '../std_data_ln/loaddata5.dat' replace into table t1 fields terminated by '' enclosed by '' ignore 1 lines (pk, apk);
select * from t1 order by pk;
delete from t1;
# Now test for load data replace which doesn't touch pk
insert into t1 values (1, 1, 1), (3, 3, 3), (5, 5, 5);
load data infile '../std_data_ln/loaddata5.dat' replace into table t1 fields terminated by '' enclosed by '' ignore 1 lines (pk, apk);
select * from t1 order by pk;
delete from t1;
# Finally test for both types of replace ... select
insert into t1 values (1, 1, 1), (2, 2, 2), (3, 3, 3);
replace into t1 (pk, apk) select 4, 1;
replace into t1 (pk, apk) select 2, 4;
select * from t1 order by pk;
# Clean-up
drop table t1;
--echo End of 5.0 tests.

92
mysql-test/t/ndb_trigger.test Normal file
View file

@ -0,0 +1,92 @@
# Tests which involve triggers and NDB storage engine
--source include/have_ndb.inc
--source include/not_embedded.inc
#
# Test for bug#18437 "Wrong values inserted with a before update
# trigger on NDB table". SQL-layer didn't properly inform handler
# about fields which were read and set in triggers. In some cases
# this resulted in incorrect (garbage) values of OLD variables and
# lost changes to NEW variables.
# You can find similar tests for ON INSERT triggers in federated.test
# since this engine so far is the only engine in MySQL which cares
# about field mark-up during handler::write_row() operation.
#
--disable_warnings
drop table if exists t1, t2, t3;
--enable_warnings
create table t1 (id int primary key, a int not null, b decimal (63,30) default 0) engine=ndb;
create table t2 (op char(1), a int not null, b decimal (63,30));
create table t3 select 1 as i;
delimiter //;
create trigger t1_bu before update on t1 for each row
begin
insert into t2 values ("u", old.a, old.b);
set new.b = old.b + 10;
end;//
create trigger t1_bd before delete on t1 for each row
begin
insert into t2 values ("d", old.a, old.b);
end;//
delimiter ;//
insert into t1 values (1, 1, 1.05), (2, 2, 2.05), (3, 3, 3.05), (4, 4, 4.05);
# Check that usual update works as it should
update t1 set a=5 where a != 3;
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t2;
# Check that everything works for multi-update
update t1, t3 set a=6 where a = 5;
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t2;
# Check for delete
delete from t1 where a != 3;
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t2;
# Check for multi-delete
insert into t1 values (1, 1, 1.05), (2, 2, 2.05), (4, 4, 4.05);
delete t1 from t1, t3 where a != 3;
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t2;
# Check for insert ... on duplicate key update
insert into t1 values (4, 4, 4.05);
insert into t1 (id, a) values (4, 1), (3, 1) on duplicate key update a= a + 1;
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t2;
# Check for insert ... select ... on duplicate key update
delete from t3;
insert into t3 values (4), (3);
insert into t1 (id, a) (select i, 1 from t3) on duplicate key update a= a + 1;
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t2;
# Check for replace
replace into t1 (id, a) values (4, 1), (3, 1);
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t1;
delete from t2;
# Check for replace ... select ...
insert into t1 values (3, 1, 1.05), (4, 1, 2.05);
replace into t1 (id, a) (select i, 2 from t3);
select * from t1 order by id;
select * from t2 order by op, a, b;
delete from t1;
delete from t2;
# Check for load data replace
insert into t1 values (3, 1, 1.05), (5, 2, 2.05);
load data infile '../std_data_ln/loaddata5.dat' replace into table t1 fields terminated by '' enclosed by '' ignore 1 lines (id, a);
select * from t1 order by id;
select * from t2 order by op, a, b;
drop tables t1, t2, t3;
--echo End of 5.0 tests

27
sql/ha_ndbcluster.cc
View file

@ -3212,20 +3212,11 @@ int ha_ndbcluster::extra(enum ha_extra_function operation)
break;
case HA_EXTRA_IGNORE_DUP_KEY: /* Dup keys don't rollback everything*/
DBUG_PRINT("info", ("HA_EXTRA_IGNORE_DUP_KEY"));
if (current_thd->lex->sql_command == SQLCOM_REPLACE && !m_has_unique_index)
{
DBUG_PRINT("info", ("Turning ON use of write instead of insert"));
m_use_write= TRUE;
} else
{
DBUG_PRINT("info", ("Ignoring duplicate key"));
m_ignore_dup_key= TRUE;
}
DBUG_PRINT("info", ("Ignoring duplicate key"));
m_ignore_dup_key= TRUE;
break;
case HA_EXTRA_NO_IGNORE_DUP_KEY:
DBUG_PRINT("info", ("HA_EXTRA_NO_IGNORE_DUP_KEY"));
DBUG_PRINT("info", ("Turning OFF use of write instead of insert"));
m_use_write= FALSE;
m_ignore_dup_key= FALSE;
break;
case HA_EXTRA_RETRIEVE_ALL_COLS: /* Retrieve all columns, not just those
@ -3255,7 +3246,19 @@ int ha_ndbcluster::extra(enum ha_extra_function operation)
case HA_EXTRA_KEYREAD_PRESERVE_FIELDS:
DBUG_PRINT("info", ("HA_EXTRA_KEYREAD_PRESERVE_FIELDS"));
break;
case HA_EXTRA_WRITE_CAN_REPLACE:
DBUG_PRINT("info", ("HA_EXTRA_WRITE_CAN_REPLACE"));
if (!m_has_unique_index)
{
DBUG_PRINT("info", ("Turning ON use of write instead of insert"));
m_use_write= TRUE;
}
break;
case HA_EXTRA_WRITE_CANNOT_REPLACE:
DBUG_PRINT("info", ("HA_EXTRA_WRITE_CANNOT_REPLACE"));
DBUG_PRINT("info", ("Turning OFF use of write instead of insert"));
m_use_write= FALSE;
break;
}
DBUG_RETURN(0);

9
sql/item.cc
View file

@ -5350,9 +5350,14 @@ void Item_insert_value::print(String *str)
void Item_trigger_field::setup_field(THD *thd, TABLE *table,
GRANT_INFO *table_grant_info)
{
/*
There is no sense in marking fields used by trigger with current value
of THD::query_id since it is completely unrelated to the THD::query_id
value for statements which will invoke trigger. So instead we use
Table_triggers_list::mark_fields_used() method which is called during
execution of these statements.
*/
bool save_set_query_id= thd->set_query_id;
/* TODO: Think more about consequences of this step. */
thd->set_query_id= 0;
/*
Try to find field by its name and if it will be found

6
sql/mysql_priv.h
View file

@ -726,9 +726,7 @@ bool mysql_alter_table(THD *thd, char *new_db, char *new_name,
TABLE_LIST *table_list,
List<create_field> &fields,
List<Key> &keys,
uint order_num, ORDER *order,
enum enum_duplicates handle_duplicates,
bool ignore,
uint order_num, ORDER *order, bool ignore,
ALTER_INFO *alter_info, bool do_send_ok);
bool mysql_recreate_table(THD *thd, TABLE_LIST *table_list, bool do_send_ok);
bool mysql_create_like_table(THD *thd, TABLE_LIST *table,
@ -764,6 +762,8 @@ bool mysql_insert(THD *thd,TABLE_LIST *table,List<Item> &fields,
bool ignore);
int check_that_all_fields_are_given_values(THD *thd, TABLE *entry,
TABLE_LIST *table_list);
void mark_fields_used_by_triggers_for_insert_stmt(THD *thd, TABLE *table,
enum_duplicates duplic);
bool mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds);
bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
SQL_LIST *order, ha_rows rows, ulonglong options,

6
sql/sql_delete.cc
View file

@ -194,6 +194,10 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
deleted=0L;
init_ftfuncs(thd, select_lex, 1);
thd->proc_info="updating";
if (table->triggers)
table->triggers->mark_fields_used(thd, TRG_EVENT_DELETE);
while (!(error=info.read_record(&info)) && !thd->killed &&
!thd->net.report_error)
{
@ -507,6 +511,8 @@ multi_delete::initialize_tables(JOIN *join)
transactional_tables= 1;
else
normal_tables= 1;
if (tbl->triggers)
tbl->triggers->mark_fields_used(thd, TRG_EVENT_DELETE);
}
else if ((tab->type != JT_SYSTEM && tab->type != JT_CONST) &&
walk == delete_tables)

77
sql/sql_insert.cc
View file

@ -241,6 +241,33 @@ static int check_update_fields(THD *thd, TABLE_LIST *insert_table_list,
}
/*
Mark fields used by triggers for INSERT-like statement.
SYNOPSIS
mark_fields_used_by_triggers_for_insert_stmt()
thd The current thread
table Table to which insert will happen
duplic Type of duplicate handling for insert which will happen
NOTE
For REPLACE there is no sense in marking particular fields
used by ON DELETE trigger as to execute it properly we have
to retrieve and store values for all table columns anyway.
*/
void mark_fields_used_by_triggers_for_insert_stmt(THD *thd, TABLE *table,
enum_duplicates duplic)
{
if (table->triggers)
{
table->triggers->mark_fields_used(thd, TRG_EVENT_INSERT);
if (duplic == DUP_UPDATE)
table->triggers->mark_fields_used(thd, TRG_EVENT_UPDATE);
}
}
bool mysql_insert(THD *thd,TABLE_LIST *table_list,
List<Item> &fields,
List<List_item> &values_list,
@ -401,6 +428,17 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
thd->proc_info="update";
if (duplic != DUP_ERROR || ignore)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
if (duplic == DUP_REPLACE)
{
if (!table->triggers || !table->triggers->has_delete_triggers())
table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
/*
REPLACE should change values of all columns so we should mark
all columns as columns to be set. As nice side effect we will
retrieve columns which values are needed for ON DELETE triggers.
*/
table->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
}
/*
let's *try* to start bulk inserts. It won't necessary
start them as values_list.elements should be greater than
@ -429,6 +467,8 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
error= 1;
}
mark_fields_used_by_triggers_for_insert_stmt(thd, table, duplic);
if (table_list->prepare_where(thd, 0, TRUE) ||
table_list->prepare_check_option(thd))
error= 1;
@ -599,6 +639,9 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
thd->next_insert_id=0; // Reset this if wrongly used
if (duplic != DUP_ERROR || ignore)
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
if (duplic == DUP_REPLACE &&
(!table->triggers || !table->triggers->has_delete_triggers()))
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
/* Reset value of LAST_INSERT_ID if no rows where inserted */
if (!info.copied && thd->insert_id_used)
@ -1902,7 +1945,8 @@ bool delayed_insert::handle_inserts(void)
{
int error;
ulong max_rows;
bool using_ignore=0, using_bin_log=mysql_bin_log.is_open();
bool using_ignore= 0, using_opt_replace= 0;
bool using_bin_log= mysql_bin_log.is_open();
delayed_row *row;
DBUG_ENTER("handle_inserts");
@ -1964,6 +2008,13 @@ bool delayed_insert::handle_inserts(void)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
using_ignore=1;
}
if (info.handle_duplicates == DUP_REPLACE &&
(!table->triggers ||
!table->triggers->has_delete_triggers()))
{
table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
using_opt_replace= 1;
}
thd.clear_error(); // reset error for binlog
if (write_record(&thd, table, &info))
{
@ -1976,6 +2027,11 @@ bool delayed_insert::handle_inserts(void)
using_ignore=0;
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
}
if (using_opt_replace)
{
using_opt_replace= 0;
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
}
if (row->query && row->log_query && using_bin_log)
{
Query_log_event qinfo(&thd, row->query, row->query_length, 0, FALSE);
@ -2221,6 +2277,12 @@ select_insert::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
thd->cuted_fields=0;
if (info.ignore || info.handle_duplicates != DUP_ERROR)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
if (info.handle_duplicates == DUP_REPLACE)
{
if (!table->triggers || !table->triggers->has_delete_triggers())
table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
table->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
}
thd->no_trans_update= 0;
thd->abort_on_warning= (!info.ignore &&
(thd->variables.sql_mode &
@ -2230,6 +2292,10 @@ select_insert::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
check_that_all_fields_are_given_values(thd, table, table_list)) ||
table_list->prepare_where(thd, 0, TRUE) ||
table_list->prepare_check_option(thd));
if (!res)
mark_fields_used_by_triggers_for_insert_stmt(thd, table,
info.handle_duplicates);
DBUG_RETURN(res);
}
@ -2395,6 +2461,7 @@ bool select_insert::send_eof()
error= (!thd->prelocked_mode) ? table->file->end_bulk_insert():0;
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
/*
We must invalidate the table in the query cache before binlog writing
@ -2624,6 +2691,12 @@ select_create::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
thd->cuted_fields=0;
if (info.ignore || info.handle_duplicates != DUP_ERROR)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
if (info.handle_duplicates == DUP_REPLACE)
{
if (!table->triggers || !table->triggers->has_delete_triggers())
table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
table->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
}
if (!thd->prelocked_mode)
table->file->start_bulk_insert((ha_rows) 0);
thd->no_trans_update= 0;
@ -2663,6 +2736,7 @@ bool select_create::send_eof()
else
{
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
VOID(pthread_mutex_lock(&LOCK_open));
mysql_unlock_tables(thd, lock);
/*
@ -2696,6 +2770,7 @@ void select_create::abort()
if (table)
{
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
enum db_type table_type=table->s->db_type;
if (!table->s->tmp_table)
{

10
sql/sql_load.cc
View file

@ -225,6 +225,8 @@ bool mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
DBUG_RETURN(TRUE);
}
mark_fields_used_by_triggers_for_insert_stmt(thd, table, handle_duplicates);
uint tot_length=0;
bool use_blobs= 0, use_vars= 0;
List_iterator_fast<Item> it(fields_vars);
@ -357,6 +359,13 @@ bool mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
if (ignore ||
handle_duplicates == DUP_REPLACE)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
if (handle_duplicates == DUP_REPLACE)
{
if (!table->triggers ||
!table->triggers->has_delete_triggers())
table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
table->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
}
if (!thd->prelocked_mode)
table->file->start_bulk_insert((ha_rows) 0);
table->copy_blobs=1;
@ -381,6 +390,7 @@ bool mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
error= 1;
}
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
table->next_number_field=0;
}
ha_enable_transaction(thd, TRUE);

7
sql/sql_parse.cc
View file

@ -3046,8 +3046,7 @@ end_with_restore_list:
lex->key_list,
select_lex->order_list.elements,
(ORDER *) select_lex->order_list.first,
lex->duplicates, lex->ignore, &lex->alter_info,
1);
lex->ignore, &lex->alter_info, 1);
}
break;
}
@ -6979,7 +6978,7 @@ bool mysql_create_index(THD *thd, TABLE_LIST *table_list, List<Key> &keys)
DBUG_RETURN(mysql_alter_table(thd,table_list->db,table_list->table_name,
&create_info, table_list,
fields, keys, 0, (ORDER*)0,
DUP_ERROR, 0, &alter_info, 1));
0, &alter_info, 1));
}
@ -6997,7 +6996,7 @@ bool mysql_drop_index(THD *thd, TABLE_LIST *table_list, ALTER_INFO *alter_info)
DBUG_RETURN(mysql_alter_table(thd,table_list->db,table_list->table_name,
&create_info, table_list,
fields, keys, 0, (ORDER*)0,
DUP_ERROR, 0, alter_info, 1));
0, alter_info, 1));
}

19
sql/sql_table.cc
View file

@ -35,9 +35,7 @@ const char *primary_key_name="PRIMARY";
static bool check_if_keyname_exists(const char *name,KEY *start, KEY *end);
static char *make_unique_key_name(const char *field_name,KEY *start,KEY *end);
static int copy_data_between_tables(TABLE *from,TABLE *to,
List<create_field> &create,
enum enum_duplicates handle_duplicates,
bool ignore,
List<create_field> &create, bool ignore,
uint order_num, ORDER *order,
ha_rows *copied,ha_rows *deleted);
static bool prepare_blob_field(THD *thd, create_field *sql_field);
@ -3128,8 +3126,7 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
HA_CREATE_INFO *create_info,
TABLE_LIST *table_list,
List<create_field> &fields, List<Key> &keys,
uint order_num, ORDER *order,
enum enum_duplicates handle_duplicates, bool ignore,
uint order_num, ORDER *order, bool ignore,
ALTER_INFO *alter_info, bool do_send_ok)
{
TABLE *table,*new_table=0;
@ -3724,8 +3721,7 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
{
new_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
new_table->next_number_field=new_table->found_next_number_field;
error=copy_data_between_tables(table,new_table,create_list,
handle_duplicates, ignore,
error=copy_data_between_tables(table, new_table, create_list, ignore,
order_num, order, &copied, &deleted);
}
thd->last_insert_id=next_insert_id; // Needed for correct log
@ -3948,7 +3944,6 @@ end_temporary:
static int
copy_data_between_tables(TABLE *from,TABLE *to,
List<create_field> &create,
enum enum_duplicates handle_duplicates,
bool ignore,
uint order_num, ORDER *order,
ha_rows *copied,
@ -4051,8 +4046,7 @@ copy_data_between_tables(TABLE *from,TABLE *to,
*/
from->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
init_read_record(&info, thd, from, (SQL_SELECT *) 0, 1,1);
if (ignore ||
handle_duplicates == DUP_REPLACE)
if (ignore)
to->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
thd->row_count= 0;
restore_record(to, s->default_values); // Create empty record
@ -4079,8 +4073,7 @@ copy_data_between_tables(TABLE *from,TABLE *to,
}
if ((error=to->file->write_row((byte*) to->record[0])))
{
if ((!ignore &&
handle_duplicates != DUP_REPLACE) ||
if (!ignore ||
(error != HA_ERR_FOUND_DUPP_KEY &&
error != HA_ERR_FOUND_DUPP_UNIQUE))
{
@ -4158,7 +4151,7 @@ bool mysql_recreate_table(THD *thd, TABLE_LIST *table_list,
DBUG_RETURN(mysql_alter_table(thd, NullS, NullS, &create_info,
table_list, lex->create_list,
lex->key_list, 0, (ORDER *) 0,
DUP_ERROR, 0, &lex->alter_info, do_send_ok));
0, &lex->alter_info, do_send_ok));
}

44
sql/sql_trigger.cc
View file

@ -1014,8 +1014,15 @@ bool Table_triggers_list::check_n_load(THD *thd, const char *db,
}
/*
Let us bind Item_trigger_field objects representing access to fields
in old/new versions of row in trigger to Field objects in table being
Gather all Item_trigger_field objects representing access to fields
in old/new versions of row in trigger into lists containing all such
objects for the triggers with same action and timing.
*/
triggers->trigger_fields[lex.trg_chistics.event]
[lex.trg_chistics.action_time]=
(Item_trigger_field *)(lex.trg_table_fields.first);
/*
Also let us bind these objects to Field objects in table being
opened.
We ignore errors here, because if even something is wrong we still
@ -1527,6 +1534,39 @@ bool Table_triggers_list::process_triggers(THD *thd, trg_event_type event,
}
/*
Mark fields of subject table which we read/set in its triggers as such.
SYNOPSIS
mark_fields_used()
thd Current thread context
event Type of event triggers for which we are going to inspect
DESCRIPTION
This method marks fields of subject table which are read/set in its
triggers as such (by setting Field::query_id equal to THD::query_id)
and thus informs handler that values for these fields should be
retrieved/stored during execution of statement.
*/
void Table_triggers_list::mark_fields_used(THD *thd, trg_event_type event)
{
int action_time;
Item_trigger_field *trg_field;
for (action_time= 0; action_time < (int)TRG_ACTION_MAX; action_time++)
{
for (trg_field= trigger_fields[event][action_time]; trg_field;
trg_field= trg_field->next_trg_field)
{
/* We cannot mark fields which does not present in table. */
if (trg_field->field_idx != (uint)-1)
table->field[trg_field->field_idx]->query_id = thd->query_id;
}
}
}
/*
Trigger BUG#14090 compatibility hook

8
sql/sql_trigger.h
View file

@ -25,6 +25,11 @@ class Table_triggers_list: public Sql_alloc
{
/* Triggers as SPs grouped by event, action_time */
sp_head *bodies[TRG_EVENT_MAX][TRG_ACTION_MAX];
/*
Heads of the lists linking items for all fields used in triggers
grouped by event and action_time.
*/
Item_trigger_field *trigger_fields[TRG_EVENT_MAX][TRG_ACTION_MAX];
/*
Copy of TABLE::Field array with field pointers set to TABLE::record[1]
buffer instead of TABLE::record[0] (used for OLD values in on UPDATE
@ -82,6 +87,7 @@ public:
record1_field(0), table(table_arg)
{
bzero((char *)bodies, sizeof(bodies));
bzero((char *)trigger_fields, sizeof(trigger_fields));
bzero((char *)&subject_table_grants, sizeof(subject_table_grants));
}
~Table_triggers_list();
@ -119,6 +125,8 @@ public:
void set_table(TABLE *new_table);
void mark_fields_used(THD *thd, trg_event_type event);
friend class Item_trigger_field;
friend int sp_cache_routines_and_add_tables_for_triggers(THD *thd, LEX *lex,
TABLE_LIST *table);

6
sql/sql_update.cc
View file

@ -433,6 +433,9 @@ int mysql_update(THD *thd,
(MODE_STRICT_TRANS_TABLES |
MODE_STRICT_ALL_TABLES)));
if (table->triggers)
table->triggers->mark_fields_used(thd, TRG_EVENT_UPDATE);
while (!(error=info.read_record(&info)) && !thd->killed)
{
if (!(select && select->skip_record()))
@ -755,6 +758,9 @@ reopen_tables:
DBUG_RETURN(TRUE);
}
if (table->triggers)
table->triggers->mark_fields_used(thd, TRG_EVENT_UPDATE);
DBUG_PRINT("info",("setting table `%s` for update", tl->alias));
/*
If table will be updated we should not downgrade lock for it and