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drop table if exists t1;
set sql_mode="";
flush status;
show status like "feature%";
Variable_name Value
Feature_application_time_periods 0
Feature_check_constraint 0
Feature_custom_aggregate_functions 0
Feature_delay_key_write 0
Feature_dynamic_columns 0
Feature_fulltext 0
Feature_gis 0
Feature_invisible_columns 0
Feature_json 0
Feature_locale 0
Feature_subquery 0
Feature_system_versioning 0
Feature_timezone 0
Feature_trigger 0
Feature_window_functions 0
Feature_xml 0
#
# Feature GIS
#
CREATE TABLE t1 (g POINT);
SHOW FIELDS FROM t1;
Field Type Null Key Default Extra
g point YES NULL
INSERT INTO t1 VALUES
(PointFromText('POINT(10 10)')),
(PointFromText('POINT(20 10)')),
(PointFromText('POINT(20 20)')),
(PointFromWKB(AsWKB(PointFromText('POINT(10 20)'))));
drop table t1;
show status like "feature_gis";
Variable_name Value
Feature_gis 3
#
# Feature dynamic columns
#
set @a= COLUMN_CREATE(1, 1212 AS int);
set @b= column_add(@a, 2, 1212 as integer);
select column_get(@b, 2 as integer);
column_get(@b, 2 as integer)
1212
show status like "feature_dynamic_columns";
Variable_name Value
Feature_dynamic_columns 2
#
# Feature fulltext
#
CREATE TABLE t1 (a VARCHAR(200), b TEXT, FULLTEXT (a,b)) engine=myisam;
INSERT INTO t1 VALUES('MySQL has now support', 'for full-text search'),
('Full-text indexes', 'are called collections'),
('Only MyISAM tables','support collections'),
('Function MATCH ... AGAINST()','is used to do a search'),
('Full-text search in MySQL', 'implements vector space model');
select * from t1 where MATCH(a,b) AGAINST ("collections");
a b
Only MyISAM tables support collections
Full-text indexes are called collections
select * from t1 where MATCH(a,b) AGAINST ("indexes");
a b
Full-text indexes are called collections
drop table t1;
show status like "feature_fulltext";
Variable_name Value
Feature_fulltext 2
#
# Feature locale
#
SET lc_messages=sr_RS;
SET lc_messages=en_US;
show status like "feature_locale";
Variable_name Value
Feature_locale 2
#
# Feature subquery
#
select (select 2);
(select 2)
2
SELECT (SELECT 1) UNION SELECT (SELECT 2);
(SELECT 1)
1
2
create table t1 (a int);
insert into t1 values (2);
select (select a from t1 where t1.a=t2.a), a from t1 as t2;
(select a from t1 where t1.a=t2.a) a
2 2
drop table t1;
show status like "feature_subquery";
Variable_name Value
Feature_subquery 4
#
# Feature timezone
#
SELECT FROM_UNIXTIME(unix_timestamp()) > "1970-01-01";
FROM_UNIXTIME(unix_timestamp()) > "1970-01-01"
1
set time_zone="+03:00";
SELECT FROM_UNIXTIME(unix_timestamp()) > "1970-01-01";
FROM_UNIXTIME(unix_timestamp()) > "1970-01-01"
1
set time_zone= @@global.time_zone;
show status like "feature_timezone";
Variable_name Value
Feature_timezone 1
#
# Feature triggers
#
create table t1 (i int);
# let us test some very simple trigger
create trigger trg before insert on t1 for each row set @a:=1;
set @a:=0;
select @a;
@a
0
insert into t1 values (1),(2);
select @a;
@a
1
SHOW TRIGGERS IN test like 't1';
Trigger Event Table Statement Timing Created sql_mode Definer character_set_client collation_connection Database Collation
trg INSERT t1 set @a:=1 BEFORE # root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
drop trigger trg;
drop table t1;
show status like "%trigger%";
Variable_name Value
Binlog_group_commit_trigger_count 0
Binlog_group_commit_trigger_lock_wait 0
Binlog_group_commit_trigger_timeout 0
Com_create_trigger 1
Com_drop_trigger 1
Com_show_create_trigger 0
Com_show_triggers 1
Executed_triggers 2
Feature_trigger 2
#
# Feature xml
#
SET @xml='<a aa1="aa1" aa2="aa2">a1<b ba1="ba1">b1<c>c1</c>b2</b>a2</a>';
SELECT extractValue(@xml,'/a');
extractValue(@xml,'/a')
a1 a2
select updatexml('<div><div><span>1</span><span>2</span></div></div>',
'/','<tr><td>1</td><td>2</td></tr>') as upd1;
upd1
<tr><td>1</td><td>2</td></tr>
show status like "feature_xml";
Variable_name Value
Feature_xml 2
#
# Feature delayed_keys
#
create table t1 (a int, key(a)) engine=myisam delay_key_write=1;
insert into t1 values(1);
insert into t1 values(2);
drop table t1;
create table t1 (a int, key(a)) engine=aria delay_key_write=1;
insert into t1 values(1);
insert into t1 values(2);
drop table t1;
show status like "feature_delay_key_write";
Variable_name Value
Feature_delay_key_write 2
create table t1 (a int check (a > 5));
create table t2 (b int, constraint foo check (b < 10));
drop table t1, t2;
show status like "feature_check_constraint";
Variable_name Value
Feature_check_constraint 2
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