mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-16 12:02:42 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge gleb.loc:/home/uchum/work/bk/5.1

Browse source 
into  gleb.loc:/home/uchum/work/bk/5.1-opt


mysql-test/r/sp.result:
  SCCS merged
mysql-test/t/sp.test:
  SCCS merged
sql/sql_lex.h:
  SCCS merged
sql/sql_parse.cc:
  SCCS merged
sql/sql_yacc.yy:
  SCCS merged
This commit is contained in:
unknown 2007-09-13 00:44:50 +05:00
commit 5b541452a8
37 changed files with 802 additions and 40 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
.bzrignore
View file

@ -476,6 +476,9 @@ contrib/*.vcproj
core
core.*
core.2430
cscope.in.out
cscope.out
cscope.po.out
db-*.*.*
dbug/*.ds?
dbug/*.vcproj

14
client/mysqldump.c
View file

@ -3039,6 +3039,18 @@ static void dump_table(char *table, char *db)
DBUG_VOID_RETURN;
}
/*
Check --skip-events flag: it is not enough to skip creation of events
discarding SHOW CREATE EVENT statements generation. The myslq.event
table data should be skipped too.
*/
if (!opt_events && !my_strcasecmp(&my_charset_latin1, db, "mysql") &&
!my_strcasecmp(&my_charset_latin1, table, "event"))
{
verbose_msg("-- Skipping data table mysql.event, --skip-events was used\n");
DBUG_VOID_RETURN;
}
result_table= quote_name(table,table_buff, 1);
opt_quoted_table= quote_name(table, table_buff2, 0);
@ -3848,7 +3860,7 @@ int init_dumping_tables(char *qdatabase)
/* Old server version, dump generic CREATE DATABASE */
if (opt_drop_database)
fprintf(md_result_file,
"\n/*!40000 DROP DATABASE IF EXISTS %s;*/\n",
"\n/*!40000 DROP DATABASE IF EXISTS %s*/;\n",
qdatabase);
fprintf(md_result_file,
"\nCREATE DATABASE /*!32312 IF NOT EXISTS*/ %s;\n",

1
include/my_pthread.h
View file

@ -519,6 +519,7 @@ typedef struct st_my_pthread_fastmutex_t
pthread_mutex_t mutex;
uint spins;
} my_pthread_fastmutex_t;
void fastmutex_global_init(void);
int my_pthread_fastmutex_init(my_pthread_fastmutex_t *mp,
const pthread_mutexattr_t *attr);

27
mysql-test/include/mix1.inc
View file

@ -969,6 +969,33 @@ ROLLBACK;
ROLLBACK;
DROP TABLE t1;
#
# Bug#30596: GROUP BY optimization gives wrong result order
#
CREATE TABLE t1(
a INT,
b INT NOT NULL,
c INT NOT NULL,
d INT,
UNIQUE KEY (c,b)
) engine=innodb;
INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
SELECT c,b,d FROM t1 GROUP BY c,b,d;
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
SELECT c,b,d FROM t1 ORDER BY c,b,d;
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
SELECT c,b,d FROM t1 GROUP BY c,b;
EXPLAIN SELECT c,b FROM t1 GROUP BY c,b;
SELECT c,b FROM t1 GROUP BY c,b;
DROP TABLE t1;
--echo End of 5.0 tests
# Fix for BUG#19243 "wrong LAST_INSERT_ID() after ON DUPLICATE KEY

48
mysql-test/r/delete.result
View file

@ -183,6 +183,17 @@ select @a;
@a
1
drop table t1;
CREATE TABLE t1 (
`date` date ,
`time` time ,
`seq` int(10) unsigned NOT NULL auto_increment,
PRIMARY KEY (`seq`),
KEY `seq` (`seq`),
KEY `time` (`time`),
KEY `date` (`date`)
);
DELETE FROM t1 ORDER BY date ASC, time ASC LIMIT 1;
drop table t1;
End of 4.1 tests
CREATE TABLE t1 (a int not null,b int not null);
CREATE TABLE t2 (a int not null, b int not null, primary key (a,b));
@ -223,3 +234,40 @@ ERROR 42S22: Unknown column 't2.x' in 'order clause'
DELETE FROM t1 ORDER BY (SELECT x);
ERROR 42S22: Unknown column 'x' in 'field list'
DROP TABLE t1;
CREATE TABLE t1 (
a INT
);
CREATE TABLE t2 (
a INT
);
CREATE DATABASE db1;
CREATE TABLE db1.t1 (
a INT
);
INSERT INTO db1.t1 (a) SELECT * FROM t1;
CREATE DATABASE db2;
CREATE TABLE db2.t1 (
a INT
);
INSERT INTO db2.t1 (a) SELECT * FROM t2;
DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING t1, t2 alias WHERE t1.a = alias.a' at line 1
DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
ERROR 42S02: Unknown table 't2' in MULTI DELETE
DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a' at line 1
DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
ERROR 42S02: Unknown table 'alias' in MULTI DELETE
DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
DELETE FROM t1 USING t1 WHERE a = 1;
SELECT * FROM t1;
a
DELETE FROM t1 alias USING t1 alias WHERE a = 2;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING t1 alias WHERE a = 2' at line 1
SELECT * FROM t1;
a
DROP TABLE t1, t2;
DROP DATABASE db1;
DROP DATABASE db2;

6
mysql-test/r/distinct.result
View file

@ -526,10 +526,10 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 3 Using index
EXPLAIN SELECT a,b FROM t1 GROUP BY a,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
EXPLAIN SELECT DISTINCT a,b FROM t1 GROUP BY a,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
CREATE TABLE t2(a INT, b INT NOT NULL, c INT NOT NULL, d INT,
PRIMARY KEY (a,b));
INSERT INTO t2 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
@ -554,7 +554,7 @@ id select_type table type possible_keys key key_len ref rows Extra
CREATE UNIQUE INDEX c_b_unq ON t2 (c,b);
EXPLAIN SELECT DISTINCT a,b,d FROM t2 GROUP BY c,b,d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using filesort
DROP TABLE t1,t2;
create table t1 (id int, dsc varchar(50));
insert into t1 values (1, "line number one"), (2, "line number two"), (3, "line number three");

95
mysql-test/r/group_by.result
View file

@ -1093,7 +1093,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 144
EXPLAIN SELECT a FROM t1 IGNORE INDEX FOR GROUP BY (PRIMARY,i2) GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 144 Using index
1 SIMPLE t1 index NULL PRIMARY 4 NULL 144 Using index; Using filesort
EXPLAIN SELECT a FROM t1 IGNORE INDEX FOR ORDER BY (PRIMARY,i2) ORDER BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 144 Using index; Using filesort
@ -1129,7 +1129,7 @@ ERROR 42000: You have an error in your SQL syntax; check the manual that corresp
EXPLAIN SELECT a FROM t1 USE INDEX FOR JOIN (i2)
USE INDEX FOR GROUP BY (i2) GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL i2 9 NULL 144 Using index
1 SIMPLE t1 # NULL i2 # NULL # #
EXPLAIN SELECT a FROM t1 FORCE INDEX FOR JOIN (i2)
FORCE INDEX FOR GROUP BY (i2) GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
@ -1176,3 +1176,94 @@ old OFF
SET @@old = off;
ERROR HY000: Variable 'old' is a read only variable
DROP TABLE t1, t2;
CREATE TABLE t1(
a INT,
b INT NOT NULL,
c INT NOT NULL,
d INT,
UNIQUE KEY (c,b)
);
INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
CREATE TABLE t2(
a INT,
b INT,
UNIQUE KEY(a,b)
);
INSERT INTO t2 VALUES (NULL, NULL), (NULL, NULL), (NULL, 1), (1, NULL), (1, 1), (1,2);
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
SELECT c,b,d FROM t1 GROUP BY c,b,d;
c b d
1 1 50
3 1 4
3 2 40
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
c b d
1 1 50
3 2 40
3 1 4
EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
SELECT c,b,d FROM t1 ORDER BY c,b,d;
c b d
1 1 50
3 1 4
3 2 40
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
SELECT c,b,d FROM t1 GROUP BY c,b;
c b d
1 1 50
3 1 4
3 2 40
EXPLAIN SELECT c,b FROM t1 GROUP BY c,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 8 NULL 3 Using index
SELECT c,b FROM t1 GROUP BY c,b;
c b
1 1
3 1
3 2
EXPLAIN SELECT a,b from t2 ORDER BY a,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL a 10 NULL 6 Using index
SELECT a,b from t2 ORDER BY a,b;
a b
NULL NULL
NULL NULL
NULL 1
1 NULL
1 1
1 2
EXPLAIN SELECT a,b from t2 GROUP BY a,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL a 10 NULL 6 Using index
SELECT a,b from t2 GROUP BY a,b;
a b
NULL NULL
NULL 1
1 NULL
1 1
1 2
EXPLAIN SELECT a from t2 GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL a 10 NULL 6 Using index
SELECT a from t2 GROUP BY a;
a
NULL
1
EXPLAIN SELECT b from t2 GROUP BY b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL a 10 NULL 6 Using index; Using temporary; Using filesort
SELECT b from t2 GROUP BY b;
b
NULL
1
2
DROP TABLE t1;

49
mysql-test/r/innodb_mysql.result
View file

@ -1141,6 +1141,55 @@ a b
ROLLBACK;
ROLLBACK;
DROP TABLE t1;
CREATE TABLE t1(
a INT,
b INT NOT NULL,
c INT NOT NULL,
d INT,
UNIQUE KEY (c,b)
) engine=innodb;
INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
SELECT c,b,d FROM t1 GROUP BY c,b,d;
c b d
1 1 50
3 1 4
3 2 40
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
c b d
1 1 50
3 1 4
3 2 40
EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
SELECT c,b,d FROM t1 ORDER BY c,b,d;
c b d
1 1 50
3 1 4
3 2 40
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 8 NULL 3
SELECT c,b,d FROM t1 GROUP BY c,b;
c b d
1 1 50
3 1 4
3 2 40
EXPLAIN SELECT c,b FROM t1 GROUP BY c,b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 8 NULL 3 Using index
SELECT c,b FROM t1 GROUP BY c,b;
c b
1 1
3 1
3 2
DROP TABLE t1;
End of 5.0 tests
CREATE TABLE `t2` (
`k` int(11) NOT NULL auto_increment,

4
mysql-test/r/mysqldump-compat.result Normal file
View file

@ -0,0 +1,4 @@
CREATE DATABASE mysqldump_30126;
USE mysqldump_30126;
CREATE TABLE t1 (c1 int);
DROP DATABASE mysqldump_30126;

13
mysql-test/r/mysqldump.result
View file

@ -4177,5 +4177,18 @@ set names latin1;
# Cleanup.
DROP DATABASE mysqldump_test_db;
#
# BUG#29938: wrong behavior of mysqldump --skip-events
# with --all-databases
#
TRUNCATE mysql.event;
USE test;
CREATE event e29938 ON SCHEDULE AT '2035-12-31 20:01:23' DO SET @bug29938=29938;
SHOW EVENTS;
Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
test e29938 root@localhost SYSTEM ONE TIME 2035-12-31 20:01:23 NULL NULL NULL NULL ENABLED 1 latin1 latin1_swedish_ci latin1_swedish_ci
TRUNCATE mysql.event;
SHOW EVENTS;
Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
#
# End of 5.1 tests
#

4
mysql-test/r/partition_pruning.result
View file

@ -631,7 +631,7 @@ flush status;
delete from t2 where b > 5;
show status like 'Handler_read_rnd_next';
Variable_name Value
Handler_read_rnd_next 1115
Handler_read_rnd_next 1215
show status like 'Handler_read_key';
Variable_name Value
Handler_read_key 0
@ -645,7 +645,7 @@ flush status;
delete from t2 where b < 5 or b > 3;
show status like 'Handler_read_rnd_next';
Variable_name Value
Handler_read_rnd_next 1115
Handler_read_rnd_next 1215
show status like 'Handler_read_key';
Variable_name Value
Handler_read_key 0

22
mysql-test/r/sp.result
View file

@ -6546,6 +6546,28 @@ DROP VIEW v1;
DROP FUNCTION f1;
DROP FUNCTION f2;
DROP TABLE t1;
create function f1()
returns int(11)
not deterministic
contains sql
sql security definer
comment ''
begin
declare x int(11);
set x=-1;
return x;
end|
create view v1 as select 1 as one, f1() as days;
show create view test.v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `test`.`v1` AS select 1 AS `one`,`f1`() AS `days` latin1 latin1_swedish_ci
select column_name from information_schema.columns
where table_name='v1' and table_schema='test';
column_name
one
days
drop view v1;
drop function f1;
# Bug#13675.

48
mysql-test/r/status.result
View file

@ -87,6 +87,54 @@ SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'max_us
VARIABLE_NAME VARIABLE_VALUE
MAX_USED_CONNECTIONS 4
SET GLOBAL thread_cache_size=@save_thread_cache_size;
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2);
SELECT a FROM t1 LIMIT 1;
a
1
SHOW SESSION STATUS LIKE 'Last_query_cost';
Variable_name Value
Last_query_cost 2.402418
EXPLAIN SELECT a FROM t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
SHOW SESSION STATUS LIKE 'Last_query_cost';
Variable_name Value
Last_query_cost 2.402418
SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
a
1
2
SHOW SESSION STATUS LIKE 'Last_query_cost';
Variable_name Value
Last_query_cost 0.000000
EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 UNION t1 ALL NULL NULL NULL NULL 2
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL Using filesort
SHOW SESSION STATUS LIKE 'Last_query_cost';
Variable_name Value
Last_query_cost 0.000000
SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
a IN (SELECT a FROM t1)
1
SHOW SESSION STATUS LIKE 'Last_query_cost';
Variable_name Value
Last_query_cost 0.000000
SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
x
1
SHOW SESSION STATUS LIKE 'Last_query_cost';
Variable_name Value
Last_query_cost 0.000000
SELECT * FROM t1 a, t1 b LIMIT 1;
a a
1 1
SHOW SESSION STATUS LIKE 'Last_query_cost';
Variable_name Value
Last_query_cost 4.805836
DROP TABLE t1;
show status like 'com_show_status';
Variable_name Value
Com_show_status 3

15
mysql-test/r/type_bit.result
View file

@ -642,6 +642,21 @@ b+0 COUNT(DISTINCT a)
1 1
3 2
DROP TABLE t1;
CREATE TABLE t1 (b BIT);
INSERT INTO t1 (b) VALUES (1), (0);
SELECT DISTINCT b FROM t1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def test t1 t1 b b 16 1 1 Y 32 0 63
b
#
#
SELECT b FROM t1 GROUP BY b;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def test t1 t1 b b 16 1 1 Y 32 0 63
b
#
#
DROP TABLE t1;
End of 5.0 tests
create table t1(a bit(7));
insert into t1 values(0x40);

22
mysql-test/suite/rpl/r/rpl_row_unsafe_funcs.result Normal file
View file

@ -0,0 +1,22 @@
stop slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
start slave;
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT, b INT);
INSERT INTO t1 SELECT 1;
INSERT INTO t1 VALUES (2),(3),(4),(5),(6);
INSERT INTO t2 SELECT 1, ROW_COUNT();
INSERT INTO t1 VALUES (2),(3),(4);
INSERT INTO t2 SELECT 2, ROW_COUNT();
SELECT b FROM t2 ORDER BY a;
b
1
3
SELECT b FROM t2 ORDER BY a;
b
1
3
DROP TABLE t1, t2;

35
mysql-test/suite/rpl/t/rpl_row_unsafe_funcs.test Normal file
View file

@ -0,0 +1,35 @@
source include/master-slave.inc;
source include/have_binlog_format_mixed.inc;
#
# Bug #30244: row_count/found_rows does not replicate well
#
connection master;
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT, b INT);
INSERT INTO t1 SELECT 1;
connection master1;
INSERT INTO t1 VALUES (2),(3),(4),(5),(6);
connection master;
INSERT INTO t2 SELECT 1, ROW_COUNT();
INSERT INTO t1 VALUES (2),(3),(4);
INSERT INTO t2 SELECT 2, ROW_COUNT();
#must return 1 and 3
SELECT b FROM t2 ORDER BY a;
sync_slave_with_master;
#must return 1 and 3
SELECT b FROM t2 ORDER BY a;
connection master;
DROP TABLE t1, t2;
sync_slave_with_master;
connection master;

58
mysql-test/t/delete.test
View file

@ -173,8 +173,20 @@ delete from t1 where (@a:= f1) order by f1 limit 1;
select @a;
drop table t1;
# BUG#30385 "Server crash when deleting with order by and limit"
CREATE TABLE t1 (
`date` date ,
`time` time ,
`seq` int(10) unsigned NOT NULL auto_increment,
PRIMARY KEY (`seq`),
KEY `seq` (`seq`),
KEY `time` (`time`),
KEY `date` (`date`)
);
DELETE FROM t1 ORDER BY date ASC, time ASC LIMIT 1;
drop table t1;
--echo End of 4.1 tests
# End of 4.1 tests
#
# Test of multi-delete where we are not scanning the first table
@ -221,3 +233,47 @@ DELETE FROM t1 ORDER BY t2.x;
DELETE FROM t1 ORDER BY (SELECT x);
DROP TABLE t1;
#
# Bug #30234: Unexpected behavior using DELETE with AS and USING
# '
CREATE TABLE t1 (
a INT
);
CREATE TABLE t2 (
a INT
);
CREATE DATABASE db1;
CREATE TABLE db1.t1 (
a INT
);
INSERT INTO db1.t1 (a) SELECT * FROM t1;
CREATE DATABASE db2;
CREATE TABLE db2.t1 (
a INT
);
INSERT INTO db2.t1 (a) SELECT * FROM t2;
--error ER_PARSE_ERROR
DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
--error ER_UNKNOWN_TABLE
DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
--error ER_PARSE_ERROR
DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
--error ER_UNKNOWN_TABLE
DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
DELETE FROM t1 USING t1 WHERE a = 1;
SELECT * FROM t1;
--error ER_PARSE_ERROR
DELETE FROM t1 alias USING t1 alias WHERE a = 2;
SELECT * FROM t1;
DROP TABLE t1, t2;
DROP DATABASE db1;
DROP DATABASE db2;

49
mysql-test/t/group_by.test
View file

@ -828,6 +828,11 @@ EXPLAIN SELECT a FROM t1 USE INDEX (i2) USE INDEX ();
EXPLAIN SELECT a FROM t1 FORCE INDEX ();
--error ER_PARSE_ERROR
EXPLAIN SELECT a FROM t1 IGNORE INDEX ();
# disable the columns irrelevant to this test here. On some systems
# without support for large files the rowid is shorter and its size affects
# the cost calculations. This causes the optimizer to choose loose index
# scan over normal index access.
--replace_column 4 # 7 # 9 # 10 #
EXPLAIN SELECT a FROM t1 USE INDEX FOR JOIN (i2)
USE INDEX FOR GROUP BY (i2) GROUP BY a;
EXPLAIN SELECT a FROM t1 FORCE INDEX FOR JOIN (i2)
@ -861,3 +866,47 @@ SHOW VARIABLES LIKE 'old';
SET @@old = off;
DROP TABLE t1, t2;
#
# Bug#30596: GROUP BY optimization gives wrong result order
#
CREATE TABLE t1(
a INT,
b INT NOT NULL,
c INT NOT NULL,
d INT,
UNIQUE KEY (c,b)
);
INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
CREATE TABLE t2(
a INT,
b INT,
UNIQUE KEY(a,b)
);
INSERT INTO t2 VALUES (NULL, NULL), (NULL, NULL), (NULL, 1), (1, NULL), (1, 1), (1,2);
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
SELECT c,b,d FROM t1 GROUP BY c,b,d;
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
SELECT c,b,d FROM t1 ORDER BY c,b,d;
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
SELECT c,b,d FROM t1 GROUP BY c,b;
EXPLAIN SELECT c,b FROM t1 GROUP BY c,b;
SELECT c,b FROM t1 GROUP BY c,b;
EXPLAIN SELECT a,b from t2 ORDER BY a,b;
SELECT a,b from t2 ORDER BY a,b;
EXPLAIN SELECT a,b from t2 GROUP BY a,b;
SELECT a,b from t2 GROUP BY a,b;
EXPLAIN SELECT a from t2 GROUP BY a;
SELECT a from t2 GROUP BY a;
EXPLAIN SELECT b from t2 GROUP BY b;
SELECT b from t2 GROUP BY b;
DROP TABLE t1;

1
mysql-test/t/mysqldump-compat.opt Normal file
View file

@ -0,0 +1 @@
--loose-debug=d,4x_server_emul

13
mysql-test/t/mysqldump-compat.test Normal file
View file

@ -0,0 +1,13 @@
# Embedded server doesn't support external clients
--source include/not_embedded.inc
#
# Bug #30126: semicolon before closing */ in /*!... CREATE DATABASE ;*/
#
CREATE DATABASE mysqldump_30126;
USE mysqldump_30126;
CREATE TABLE t1 (c1 int);
--exec $MYSQL_DUMP --add-drop-database mysqldump_30126 > $MYSQLTEST_VARDIR/tmp/bug30126.sql
--exec $MYSQL mysqldump_30126 < $MYSQLTEST_VARDIR/tmp/bug30126.sql
DROP DATABASE mysqldump_30126;

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

@ -1755,6 +1755,22 @@ DROP DATABASE mysqldump_test_db;
###########################################################################
--echo #
--echo # BUG#29938: wrong behavior of mysqldump --skip-events
--echo # with --all-databases
--echo #
TRUNCATE mysql.event;
USE test;
CREATE event e29938 ON SCHEDULE AT '2035-12-31 20:01:23' DO SET @bug29938=29938;
SHOW EVENTS;
--exec $MYSQL_DUMP --skip-events --all-databases > $MYSQLTEST_VARDIR/tmp/bug29938.sql
TRUNCATE mysql.event;
--exec $MYSQL < $MYSQLTEST_VARDIR/tmp/bug29938.sql
SHOW EVENTS;
--echo #
--echo # End of 5.1 tests
--echo #

33
mysql-test/t/sp.test
View file

@ -7494,6 +7494,39 @@ DROP FUNCTION f1;
DROP FUNCTION f2;
DROP TABLE t1;
#
# Bug#29408 Cannot find view in columns table if the selection contains a function
#
delimiter |;
create function f1()
returns int(11)
not deterministic
contains sql
sql security definer
comment ''
begin
declare x int(11);
set x=-1;
return x;
end|
delimiter ;|
create view v1 as select 1 as one, f1() as days;
connect (bug29408, localhost, root,,*NO-ONE*);
connection bug29408;
show create view test.v1;
select column_name from information_schema.columns
where table_name='v1' and table_schema='test';
connection default;
disconnect bug29408;
drop view v1;
drop function f1;
#
# Bug#13675: DATETIME/DATE type in store proc param seems to be converted as
# varbinary

32
mysql-test/t/status.test
View file

@ -186,6 +186,38 @@ disconnect con3;
disconnect con2;
disconnect con1;
#
# Bug #30377: EXPLAIN loses last_query_cost when used with UNION
#
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2);
SELECT a FROM t1 LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
EXPLAIN SELECT a FROM t1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
SHOW SESSION STATUS LIKE 'Last_query_cost';
EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT * FROM t1 a, t1 b LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
DROP TABLE t1;
# End of 5.0 tests
#

13
mysql-test/t/type_bit.test
View file

@ -291,6 +291,19 @@ INSERT INTO t1 (b, a) VALUES (1, 1), (3, 2), (0, 3), (3, 4);
SELECT b+0, COUNT(DISTINCT a) FROM t1 GROUP BY b;
DROP TABLE t1;
#
# Bug#30245: A wrong type of a BIT field is reported when grouped by it.
#
CREATE TABLE t1 (b BIT);
INSERT INTO t1 (b) VALUES (1), (0);
--enable_metadata
--replace_column 1 #
SELECT DISTINCT b FROM t1;
--replace_column 1 #
SELECT b FROM t1 GROUP BY b;
--disable_metadata
DROP TABLE t1;
--echo End of 5.0 tests
#

3
mysys/my_init.c
View file

@ -78,6 +78,9 @@ my_bool my_init(void)
my_umask_dir= 0700; /* Default umask for new directories */
#if defined(THREAD) && defined(SAFE_MUTEX)
safe_mutex_global_init(); /* Must be called early */
#endif
#if defined(THREAD) && defined(MY_PTHREAD_FASTMUTEX) && !defined(SAFE_MUTEX)
fastmutex_global_init(); /* Must be called early */
#endif
netware_init();
#ifdef THREAD

17
mysys/thr_mutex.c
View file

@ -394,15 +394,11 @@ ulong mutex_delay(ulong delayloops)
#define MY_PTHREAD_FASTMUTEX_SPINS 8
#define MY_PTHREAD_FASTMUTEX_DELAY 4
static int cpu_count= 0;
int my_pthread_fastmutex_init(my_pthread_fastmutex_t *mp,
const pthread_mutexattr_t *attr)
{
static int cpu_count= 0;
#ifdef _SC_NPROCESSORS_CONF
if (!cpu_count && (attr == MY_MUTEX_INIT_FAST))
cpu_count= sysconf(_SC_NPROCESSORS_CONF);
#endif
if ((cpu_count > 1) && (attr == MY_MUTEX_INIT_FAST))
mp->spins= MY_PTHREAD_FASTMUTEX_SPINS;
else
@ -432,4 +428,13 @@ int my_pthread_fastmutex_lock(my_pthread_fastmutex_t *mp)
}
return pthread_mutex_lock(&mp->mutex);
}
void fastmutex_global_init(void)
{
#ifdef _SC_NPROCESSORS_CONF
cpu_count= sysconf(_SC_NPROCESSORS_CONF);
#endif
}
#endif /* defined(THREAD) && defined(MY_PTHREAD_FASTMUTEX) && !defined(SAFE_MUTEX) */

37
sql/ha_partition.cc
View file

@ -3235,14 +3235,9 @@ end_dont_reset_start_part:
void ha_partition::position(const uchar *record)
{
handler *file;
handler *file= m_file[m_last_part];
DBUG_ENTER("ha_partition::position");
if (unlikely(get_part_for_delete(record, m_rec0, m_part_info, &m_last_part)))
m_last_part= 0;
file= m_file[m_last_part];
file->position(record);
int2store(ref, m_last_part);
memcpy((ref + PARTITION_BYTES_IN_POS), file->ref,
@ -3300,6 +3295,36 @@ int ha_partition::rnd_pos(uchar * buf, uchar *pos)
}
/*
Read row using position using given record to find
SYNOPSIS
rnd_pos_by_record()
record Current record in MySQL Row Format
RETURN VALUE
>0 Error code
0 Success
DESCRIPTION
this works as position()+rnd_pos() functions, but does some extra work,
calculating m_last_part - the partition to where the 'record'
should go.
called from replication (log_event.cc)
*/
int ha_partition::rnd_pos_by_record(uchar *record)
{
DBUG_ENTER("ha_partition::rnd_pos_by_record");
if (unlikely(get_part_for_delete(record, m_rec0, m_part_info, &m_last_part)))
DBUG_RETURN(1);
DBUG_RETURN(handler::rnd_pos_by_record(record));
}
/****************************************************************************
MODULE index scan
****************************************************************************/

1
sql/ha_partition.h
View file

@ -353,6 +353,7 @@ public:
virtual int rnd_end();
virtual int rnd_next(uchar * buf);
virtual int rnd_pos(uchar * buf, uchar * pos);
virtual int rnd_pos_by_record(uchar *record);
virtual void position(const uchar * record);
/*

11
sql/handler.h
View file

@ -1343,6 +1343,17 @@ public:
virtual int ft_read(uchar *buf) { return HA_ERR_WRONG_COMMAND; }
virtual int rnd_next(uchar *buf)=0;
virtual int rnd_pos(uchar * buf, uchar *pos)=0;
/*
one has to use this method when to find
random position by record as the plain
position() call doesn't work for some
handlers for random position
*/
virtual int rnd_pos_by_record(uchar *record)
{
position(record);
return rnd_pos(record, ref);
}
virtual int read_first_row(uchar *buf, uint primary_key);
/*
The following function is only needed for tables that may be temporary

2
sql/item_create.cc
View file

@ -3339,6 +3339,7 @@ Create_func_found_rows Create_func_found_rows::s_singleton;
Item*
Create_func_found_rows::create(THD *thd)
{
thd->lex->set_stmt_unsafe();
thd->lex->safe_to_cache_query= 0;
return new (thd->mem_root) Item_func_found_rows();
}
@ -4234,6 +4235,7 @@ Create_func_row_count Create_func_row_count::s_singleton;
Item*
Create_func_row_count::create(THD *thd)
{
thd->lex->set_stmt_unsafe();
thd->lex->safe_to_cache_query= 0;
return new (thd->mem_root) Item_func_row_count();
}

3
sql/log_event.cc
View file

@ -7501,8 +7501,7 @@ int Rows_log_event::find_row(const Relay_log_info *rli)
*/
DBUG_PRINT("info",("locating record using primary key (position)"));
table->file->position(table->record[0]);
error= table->file->rnd_pos(table->record[0], table->file->ref);
int error= table->file->rnd_pos_by_record(table->record[0]);
if (error)
{
DBUG_PRINT("info",("rnd_pos returns error %d",error));

3
sql/opt_range.cc
View file

@ -1778,6 +1778,7 @@ uint get_index_for_order(TABLE *table, ORDER *order, ha_rows limit)
if (!(table->keys_in_use_for_query.is_set(idx)))
continue;
KEY_PART_INFO *keyinfo= table->key_info[idx].key_part;
uint n_parts= table->key_info[idx].key_parts;
uint partno= 0;
/*
@ -1787,7 +1788,7 @@ uint get_index_for_order(TABLE *table, ORDER *order, ha_rows limit)
*/
if (!(table->file->index_flags(idx, 0, 1) & HA_READ_ORDER))
continue;
for (ord= order; ord; ord= ord->next, partno++)
for (ord= order; ord && partno < n_parts; ord= ord->next, partno++)
{
Item *item= order->item[0];
if (!(item->type() == Item::FIELD_ITEM &&

22
sql/sql_lex.h
View file

@ -1798,6 +1798,28 @@ typedef struct st_lex : public Query_tables_list
bool table_or_sp_used();
bool is_partition_management() const;
/**
@brief check if the statement is a single-level join
@return result of the check
@retval TRUE The statement doesn't contain subqueries, unions and
stored procedure calls.
@retval FALSE There are subqueries, UNIONs or stored procedure calls.
*/
bool is_single_level_stmt()
{
/*
This check exploits the fact that the last added to all_select_list is
on its top. So select_lex (as the first added) will be at the tail
of the list.
*/
if (&select_lex == all_selects_list && !sroutines.records)
{
DBUG_ASSERT(!all_selects_list->next_select_in_list());
return TRUE;
}
return FALSE;
}
} LEX;
struct st_lex_local: public st_lex

8
sql/sql_parse.cc
View file

@ -1003,14 +1003,13 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
/* Locked closure of all tables */
TABLE_LIST table_list;
LEX_STRING conv_name;
size_t dummy;
/* used as fields initializator */
lex_start(thd);
status_var_increment(thd->status_var.com_stat[SQLCOM_SHOW_FIELDS]);
bzero((char*) &table_list,sizeof(table_list));
if (thd->copy_db_to(&table_list.db, &dummy))
if (thd->copy_db_to(&table_list.db, &table_list.db_length))
break;
/*
We have name + wildcard in packet, separated by endzero
@ -1732,8 +1731,7 @@ mysql_execute_command(THD *thd)
variables, but for now this is probably good enough.
Don't reset warnings when executing a stored routine.
*/
if ((all_tables || &lex->select_lex != lex->all_selects_list ||
lex->sroutines.records) && !thd->spcont)
if ((all_tables || !lex->is_single_level_stmt()) && !thd->spcont)
mysql_reset_errors(thd, 0);
#ifdef HAVE_REPLICATION
@ -3260,6 +3258,8 @@ end_with_restore_list:
}
case SQLCOM_SHOW_CREATE_DB:
{
DBUG_EXECUTE_IF("4x_server_emul",
my_error(ER_UNKNOWN_ERROR, MYF(0)); goto error;);
if (check_db_name(&lex->name))
{
my_error(ER_WRONG_DB_NAME, MYF(0), lex->name.str);

82
sql/sql_select.cc
View file

@ -195,6 +195,7 @@ static bool setup_new_fields(THD *thd, List<Item> &fields,
List<Item> &all_fields, ORDER *new_order);
static ORDER *create_distinct_group(THD *thd, Item **ref_pointer_array,
ORDER *order, List<Item> &fields,
List<Item> &all_fields,
bool *all_order_by_fields_used);
static bool test_if_subpart(ORDER *a,ORDER *b);
static TABLE *get_sort_by_table(ORDER *a,ORDER *b,TABLE_LIST *tables);
@ -543,6 +544,28 @@ JOIN::prepare(Item ***rref_pointer_array,
fix_inner_refs(thd, all_fields, select_lex, ref_pointer_array))
DBUG_RETURN(-1);
if (group_list)
{
/*
Because HEAP tables can't index BIT fields we need to use an
additional hidden field for grouping because later it will be
converted to a LONG field. Original field will remain of the
BIT type and will be returned to a client.
*/
for (ORDER *ord= group_list; ord; ord= ord->next)
{
if ((*ord->item)->type() == Item::FIELD_ITEM &&
(*ord->item)->field_type() == MYSQL_TYPE_BIT)
{
Item_field *field= new Item_field(thd, *(Item_field**)ord->item);
int el= all_fields.elements;
ref_pointer_array[el]= field;
all_fields.push_front(field);
ord->item= ref_pointer_array + el;
}
}
}
if (setup_ftfuncs(select_lex)) /* should be after having->fix_fields */
DBUG_RETURN(-1);
@ -1046,6 +1069,20 @@ JOIN::optimize()
find_field_in_order_list,
(void *) group_list))
{
/*
We have found that grouping can be removed since groups correspond to
only one row anyway, but we still have to guarantee correct result
order. The line below effectively rewrites the query from GROUP BY
<fields> to ORDER BY <fields>. One exception is if skip_sort_order is
set (see above), then we can simply skip GROUP BY.
*/
order= skip_sort_order ? 0 : group_list;
/*
If we have an IGNORE INDEX FOR GROUP BY(fields) clause, this must be
rewritten to IGNORE INDEX FOR ORDER BY(fields).
*/
join_tab->table->keys_in_use_for_order_by=
join_tab->table->keys_in_use_for_group_by;
group_list= 0;
group= 0;
}
@ -1085,12 +1122,13 @@ JOIN::optimize()
skip_sort_order= test_if_skip_sort_order(tab, order, select_limit, 1,
&tab->table->keys_in_use_for_order_by);
if ((group_list=create_distinct_group(thd, select_lex->ref_pointer_array,
order, fields_list,
order, fields_list, all_fields,
&all_order_fields_used)))
{
bool skip_group= (skip_sort_order &&
test_if_skip_sort_order(tab, group_list, select_limit, 1,
&tab->table->keys_in_use_for_group_by) != 0);
count_field_types(select_lex, &tmp_table_param, all_fields, 0);
if ((skip_group && all_order_fields_used) ||
select_limit == HA_POS_ERROR ||
(order && !skip_sort_order))
@ -4467,8 +4505,12 @@ choose_plan(JOIN *join, table_map join_tables)
/*
Store the cost of this query into a user variable
Don't update last_query_cost for statements that are not "flat joins" :
i.e. they have subqueries, unions or call stored procedures.
TODO: calculate a correct cost for a query with subqueries and UNIONs.
*/
join->thd->status_var.last_query_cost= join->best_read;
if (join->thd->lex->is_single_level_stmt())
join->thd->status_var.last_query_cost= join->best_read;
DBUG_RETURN(FALSE);
}
@ -14092,11 +14134,12 @@ setup_new_fields(THD *thd, List<Item> &fields,
static ORDER *
create_distinct_group(THD *thd, Item **ref_pointer_array,
ORDER *order_list, List<Item> &fields,
ORDER *order_list, List<Item> &fields,
List<Item> &all_fields,
bool *all_order_by_fields_used)
{
List_iterator<Item> li(fields);
Item *item;
Item *item, **orig_ref_pointer_array= ref_pointer_array;
ORDER *order,*group,**prev;
*all_order_by_fields_used= 1;
@ -14136,12 +14179,31 @@ create_distinct_group(THD *thd, Item **ref_pointer_array,
ORDER *ord=(ORDER*) thd->calloc(sizeof(ORDER));
if (!ord)
return 0;
/*
We have here only field_list (not all_field_list), so we can use
simple indexing of ref_pointer_array (order in the array and in the
list are same)
*/
ord->item= ref_pointer_array;
if (item->type() == Item::FIELD_ITEM &&
item->field_type() == MYSQL_TYPE_BIT)
{
/*
Because HEAP tables can't index BIT fields we need to use an
additional hidden field for grouping because later it will be
converted to a LONG field. Original field will remain of the
BIT type and will be returned to a client.
*/
Item_field *new_item= new Item_field(thd, (Item_field*)item);
int el= all_fields.elements;
orig_ref_pointer_array[el]= new_item;
all_fields.push_front(new_item);
ord->item= orig_ref_pointer_array + el;
}
else
{
/*
We have here only field_list (not all_field_list), so we can use
simple indexing of ref_pointer_array (order in the array and in the
list are same)
*/
ord->item= ref_pointer_array;
}
ord->asc=1;
*prev=ord;
prev= &ord->next;

13
sql/sql_view.cc
View file

@ -1044,10 +1044,20 @@ bool mysql_make_view(THD *thd, File_parser *parser, TABLE_LIST *table,
table->view= lex= thd->lex= (LEX*) new(thd->mem_root) st_lex_local;
{
char old_db_buf[NAME_LEN+1];
LEX_STRING old_db= { old_db_buf, sizeof(old_db_buf) };
bool dbchanged;
Lex_input_stream lip(thd,
table->select_stmt.str,
table->select_stmt.length);
/*
Use view db name as thread default database, in order to ensure
that the view is parsed and prepared correctly.
*/
if ((result= sp_use_new_db(thd, table->view_db, &old_db, 1, &dbchanged)))
goto end;
lex_start(thd);
view_select= &lex->select_lex;
view_select->select_number= ++thd->select_number;
@ -1091,6 +1101,9 @@ bool mysql_make_view(THD *thd, File_parser *parser, TABLE_LIST *table,
lex->sql_command= old_lex->sql_command;
thd->variables.sql_mode= saved_mode;
if (dbchanged && mysql_change_db(thd, &old_db, TRUE))
goto err;
}
if (!parse_status)
{

19
sql/sql_yacc.yy
View file

@ -1253,7 +1253,8 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
field_opt_list opt_binary table_lock_list table_lock
ref_list opt_on_delete opt_on_delete_list opt_on_delete_item use
opt_delete_options opt_delete_option varchar nchar nvarchar
opt_outer table_list table_name opt_option opt_place
opt_outer table_list table_name table_alias_ref_list table_alias_ref
opt_option opt_place
opt_attribute opt_attribute_list attribute column_list column_list_id
opt_column_list grant_privileges grant_ident grant_list grant_option
object_privilege object_privilege_list user_list rename_list
@ -8656,6 +8657,20 @@ table_name:
}
;
table_alias_ref_list:
table_alias_ref
| table_alias_ref_list ',' table_alias_ref;
table_alias_ref:
table_ident
{
if (!Select->add_table_to_list(YYTHD, $1, NULL,
TL_OPTION_UPDATING | TL_OPTION_ALIAS,
Lex->lock_option ))
MYSQL_YYABORT;
}
;
if_exists:
/* empty */ { $$= 0; }
| IF EXISTS { $$= 1; }
@ -8945,7 +8960,7 @@ single_multi:
if (multi_delete_set_locks_and_link_aux_tables(Lex))
MYSQL_YYABORT;
}
| FROM table_wild_list
| FROM table_alias_ref_list
{ mysql_init_multi_delete(Lex); }
USING join_table_list where_clause
{