[Java Küche RDB 最前線 2015] MySQL 5.7技術アップデート

Copyright*©*201 ,*Oracle*and/or*its*aﬃliates.*All*rights*reserved.**|*
MySQL&5.7&&& &
Ryusuke*Kajiyama*/* */*@RKajiyama*
MySQL*Sales*ConsulIng*Senior*Manager,*Asia*Paciﬁc*&*Japan*
The&State&of&the&Dolphin

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The*world's*most*popular*open*source*database*
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20*MySQL 20 *
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*A*Year*of*Anniversaries!

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DB8Engines.com&
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•  MySQL
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MySQL :*Yum,*APT,*NuGET*

GitHub MySQL &
•  MySQL Git*
–  *
–  *
–  *
•  GitHub*for*MySQL*Community*
–  *
–  h^ps://github.com/mysql*
–  :*h^p://mysqlrelease.com*
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MySQL*5.6*
h>p://dev.mysql.com/doc/refman/5.6/ja/index.html
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MySQL*Enterprise*EdiIon
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1
SCSK
16
1
MySQL
MySQL
MySQL Enterprise Monitor
Query Analizer
MySQL

ID
UIDAI:&Unique&IdenNﬁcaNon&Authority&of&India
17
*(UIDAI:*
Unique*IdenIﬁcaIon*Authority*of*
India Aadhaar
ID 2015 8
9 ID
*
MySQL
UID
MySQL
MySQL
ACID

** *
•  *
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•  *
•  *
• 
•  *
•  *
•  *
•  *
*
MySQL*Enterprise*EdiIon*
18*

“ MySQL DBA”##
#
MySQL*Enterprise*Monitor
•  MySQL
*
•  MySQL *
*
*
•  *
•  &
•  SQL
Query*Analyzer*

MySQL&Enterprise&Backup&
•  / *
• 
•  *&*
*
MySQL&Enterprise&Security&
•  (PAM,*
Windows,*LDAP,*etc.)*
• MySQL*Enterprise*Monitor
MySQL&Enterprise&EncrypNon&
• AES256 *
•  /* *
• 
*
MySQL&Enterprise&Audit&
•  SQL
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• 
*
• 
XML *
MySQL*Enterprise*EdiIon

MySQL*Enterprise*Firewall*
•  SQL*InjecIon*ProtecIon*with*PosiIve*Security*Model*
•  Out*of*policy*database*transacIons*detected*and*blocked*
•  Logging*&*Analysis*
21*

MySQL*Support *
•  &
SQL &
– 
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&
–  &
h>p://www8jp.mysql.com/support/consultaNve.html&
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–  &
–  &

MySQL*Support *
•  &
– CPU &
•  &
–  &
h>p://www.oracle.com/jp/support/lifeNme8support/index.html&
h>p://www8jp.mysql.com/support/&

Oracle*Enterprise*Manager*for*MySQL*
Web &
•  70% MySQL *
– Web *
–  *
* **
24*

MySQL*Enterprise*EdiIon*&*Cluster*CGE *
30 &
•  Oracle&SoXware&Delivery&Cloud&
h^p://edelivery.oracle.com/**
*
•  *
“MySQL*Database”*
*
•  *
h^p://dev.mysql.com/doc/index`
enterprise.html*
*
*

MySQL*Cluster*7.4*GA
26

1,000 MySQL*Cluster
27
Paypal
1 20
203
30%
MySQL
MySQL Cluster AWS 5
1/3
MySQL
“NoSQL
SQL
”
Daniel Austin, Chief Architect,
PayPal
h>p://www8jp.mysql.com/customers/view/?id=1223

:* *
•  *
•  *
•  *
•  *
•  *
•  *
•  *
•  *
•  *
•  *&*
*
•  4 MySQL*Cluster *Linux
Windows*
MySQL*User*Conference*Session:*h^p://bit.ly/ogeid3*

MySQL*Cluster:*SQL*and*NoSQL*Hybrid*APIs
AcNve8AcNve&RDBMS && NoSQL&
29
MySQL*Cluster*Data*Nodes*
Apps Apps Apps Apps Apps Apps Apps Apps Apps Apps Apps
JPA
Cluster*JPA
PHP Perl Python Ruby JDBC Cluster*J JS Memcached
MySQL JNI Node.JS ndb_eng
NDB*API*(C++)

MySQL*Cluster*7.4*–*
NoSQL:*20 / & *
FlexAsych*(C++*NDB*API)
SQL:*250
/ & *
DBT2*BM
31
!"!!!!
!50,000,000!!
!100,000,000!!
!150,000,000!!
!200,000,000!!
!250,000,000!!
2! 4! 6! 8! 10! 12! 14! 16! 18! 20! 22! 24! 26! 28! 30! 32!
Reads&per&second&
Data&Nodes&
FlexAsync&Reads&
!"!!!!
!500,000!!
!1,000,000!!
!1,500,000!!
!2,000,000!!
!2,500,000!!
!3,000,000!!
2! 4! 6! 8! 10! 12! 14! 16!
SQL$Statements/sec$
Data$Nodes$
DBT2$SQL$Statements$per$Second$

Copyright*©*201 ,*Oracle*and/or*its*aﬃliates.*All*rights*reserved.**|*
MySQL& &
&
*

Copyright*©*201 *Oracle*and/or*its*aﬃliates.*All*rights*reserved.**|* 33
4.0&
/GIS*(MyISAM)*
UPDATE/DELETE*
Oracle*MySQL* Sun*
3.23&
MyISAM*
InnoDB*
*
5.1&
*
* *
*
*
5.6&
memcached*API*
UNDO *
Global*TransacIon*ID*
*
ALTER*TABLE*
*
5.5&
InnoDB *
*
PERFORMANCE_SCHEMA*
1.083.22 &
*(ISAM,*HEAP)
Windows /64bit *
*(SJIS/UJIS)
5.0&
*
/ / *
XA
INFORMATION_SCHEMA*
4.1&
Unicode *
*
CSV,*ARCHIVE*
ndbcluster*
1995 2000 2005 2010 2015
5.7+&
*
*
*
*
CJK /GIS*(InnoDB)*
*
*
NoSQL *
*
*

•  MySQL*5.0*(2005)*
–  *
–  *
–  *
–  *
–  *
– XA *
– INFORMATION_SCHEMA*
•  MySQL*5.1*(2008)*
–  *
*
–  *
–  *
*
–  *
– 
34
•  MySQL*5.5*(2010)*
– InnoDB *
–  *
*
–  *
*
– PERFORMANCE_SCHEMA
MySQL

•  *
–  *
–  *
– SSD *
– UNDO *
–  *
– JSON*EXPLAIN*
– Memcached*API*
• 
– Global*TransacIon*ID*
–  *
–  *
– Binlog* *
– 
*
–  *
*
– 
35
•  *
–  ALTER*TABLE*
–  *
*
–  *
*
–  *
•  *
•  SHA256*
•  *
MySQL*5.6

MySQL*5.6:*InnoDB*–*
ALTER&TABLE
•  ADD/DROP*INDEX*
•  ADD/DROP*COLUMN*
•  ADD/DROP*FOREIGN*KEY*
•  RENAME*COLUMN,*TABLE*
•  CREATE*PRIMARY*KEY*
•  ALTER*ROW_FORMAT,*KEY_BLOCK_SIZE*
•  ALTER*COLUMN*NULLABLE,*NOT_NULLABLE*
•

MySQL*5.6:*InnoDB
•  *
•  / *
•  ID
&
:*
mysql> SET innodb_buffer_pool_dump_at_shutdown=ON;
:*
mysql> SET innodb_buffer_pool_load_at_startup=ON;*
! * *
! * SaaS *

CREATE TABLE t(c1 INT) engine=InnoDB;
FLUSH TABLE t FOR EXPORT; -- quiesce the table and create the meta data file
$innodb_data_home_dir/test/t.cfg
UNLOCK TABLES;
CREATE TABLE t(c1 INT) engine=InnoDB; -- if it doesn't already exist
ALTER TABLE t DISCARD TABLESPACE;
-- The user must stop all updates on the tables, prior to the IMPORT
ALTER TABLE t IMPORT TABLESPACE;
MySQL*5.6:*InnoDB
•  MySQL *
– Export*
– Import

MySQL*5.6:*InnoDB
RDBMS NoSQL
•  Memcached*API *
–  Memcached *
– SQL
•  NotOnlySQL *
–  *
–  JOIN FK SQL
•  *
– mysqld Memcached
*
–  InnoDB*API memcached*
*
InnoDB&Storage&Engine&
MySQL&Server& Memcached&plugin&
ApplicaNon&
SQL&&
(MySQL&Client)&
NoSQL&&
(Memcached&
&&Protocol)&
mysqld&

MySQL*5.7*RC2
41

MySQL*5.7*Release*Candidate*2*Available!*
42*
InnoDB :* *
Online&Bulk*load* *
*
*(mulI`source,*mulI`threaded*slaves )*
:*
greater*user*control*&*beêr*query*performance*
Performance*Schema *
MySQL*SYS*Schema *
&&& & &
MySQL*5.6 2 *
:**
,* & *
NEW!*JSON Support*(now*in*labs)*
RC2*
And*many*more*new*features*and*enhancements...*h^p://mysqlserverteam.com/the`mysql`5`7`7`release`candidateìsàvailable/*#

0&
100,000&
200,000&
300,000&
400,000&
500,000&
600,000&
700,000&
8& 16& 32& 64& 128& 256& 512& 1,024&
Queries&per&Second&
ConnecNons&
MySQL&5.7:&Sysbench&Read&Only&(Point&Select)&
MySQL&5.7&
MySQL&5.6&
MySQL&5.5&
MySQL*5.7:*Sysbench*Benchmark*
*
Intel(R)*Xeon(R)*CPU*E7`4860*x86_64*
4*sockets*x*10*cores`HT*(80*CPU*threads)*
2.3*GHz,*512*GB*RAM*
Oracle*Linux*6.5*
&&&&&&&&&&2x&Faster&than&MySQL&5.6&
& & & &3x&Faster&than&MySQL&5.5&
645,000&QPS&
43*

InnoDB* *
Thank*you,*SanDisk*Fusion`io*
•  *
–  *
– IO *
–  *
OS (NVMFS) *
•  IO **
– MySQL *
–  *
–  SSD *
•  InnoDB UNDO *
44*
RC2*

MySQL*5.7:* *–* &
SQL
•  *
– * *
– * *
•  *
–  I/O *
–  *
•  *
•  EXPLAIN JSON *
*
45*

MySQL*5.7:*OpImizer*`*JSON*EXPLAIN *
•  JSON*EXPLAIN *
–  *
– MySQL*Workbench Visual*Explain *
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "200.40"
},
"table": {
"table_name": "nicer_but_slower_film_list",
"access_type": "ALL",
"rows_examined_per_scan": 992,
"rows_produced_per_join": 992,
"filtered": 100,
"cost_info": {
"read_cost": "2.00",
"eval_cost": "198.40",
"prefix_cost": "200.40",
"data_read_per_join": "852K"
},
"used_columns": [
"FID",
"title",
"description",
"category",
"price",
"length",
"rating",
"actors"
],
...

InnoDB*`**Temporary*Tables*
•  *
– CREATE/DROP *
– DDL , I/O *
•  DML *
– No*REDO*logging,*no*change*buﬀering,*less*locking*
•  *
– ACID/MVCC *
–  *
48*
14.11&InnoDB&Startup&OpNons&and&System&Variables&

InnoDB*`*NaIve*parIIoning*Support
InnoDB *
• 
• 
49
Handler*
*(ha_innopart)*
Encapsulate*all*parIIoning*in*one*single&handler
InnoDB&NaNve&ParNNoning&–&Early&Access&
main*handler&
(ha_parIIon)
ParIIon*1*
handler&
ha_innobase
ParIIon*2*
handler&
ha_innobase
ParIIon*N*
handler&
ha_innobase
………

&
•  *( )**
•  *
–  *
*
–  *
– JOIN *
•  OR *
*
50*

InnoDB*`*Full*Text*Search*(FTS)
•  N`gram *
–  *
•  mecab *
– 
51
CREATE TABLE `N_DEMO`(
`FTS_N_ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`title` varchar(100) DEFAULT NULL,
PRIMARY KEY (`FTS_N_ID`),
FULLTEXT KEY `ngram_idx` (`title`) /*!50100 WITH PARSER `ngram` */
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4;
CREATE TABLE `M_DEMO` (
`FTS_M_ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`title` varchar(100) DEFAULT NULL,
PRIMARY KEY (`FTS_M_ID`),
FULLTEXT KEY `mecab_idx` (`title`) /*!50100 WITH PARSER `mecab` */
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4;

MySQL*5.7*RC *
•  Performance&Schema:*性能統計情報のさらなる追加*
•  *
•  SYSLOG Linux/Windows *
•  GIS InnoDB Boost.Geometry *
•  Security , *
52*
•  ReplicaNon*for*be^er*scalability*and*availability*
•  Fabric*for*high*availability*and*sharding*

MySQL&SYS&Schema&
DB管理者、開発者や運用担当者を支援&
•  DB管理者や運用担当者の作業効率を改善&
*`*サーバの稼働状況、ユーザやホストの状況、主要な稼働指標***
*`*性能問題の発見、分析および改善*
*
•  状況をより簡単に把握し理解するための複数のビュ
ー&
*`*IO量の高いファイルや処理、ロック、コストの高いSQL文***
*`*テーブル、インデックス、スキーマの統計***
•  他のデータベースにおけるSYS類似機能:*
`  Oracle*V$表*****(動的パフォーマンスビュー)*
`  Microso{*SQL*Server*DMV (Dynamic*Management*Views)* 53*

&
54*
• Resize&the&InnoDB&Buffer&Pool&online**
–  オンラインでのバッファーサイズのチューニング*
–  データベースの使用パターンの変化にリアルタイムで適応*
• Separate&UNDO&tablespace&
–  自動オンラインUNDOログ切り捨て(MySQL*5.7.5∼)*
–  UNDOログファイルサイズの増加を回避する事が可能*
• Dynamic&configuraNon&
–  Making*exisIng*se|ngs*dynamically*configurable*
–  As*a*design*principle*for*new*features*&*se|ngs*
–  その他、幾つかのレプリケーションの設定変更等も*
オンラインで変更可能になりました。*
14.4.8*TruncaIng*Undo*Logs*That*Reside*in*Undo*Tablespaces*

•  *
–  *
–  *
•  OGC(Open*GeospaIal*ConsorIum) *
–  *
•  Boost.Geometry *
–  *
–  *
•  Boost.Geometry *
MySQL&5.7:&GIS&8&Boost.Geometry &
55*
ALTER*TABLE* add*SPATIAL*index( );

MySQL*5.7*
•  mysql_install_db *
– mysqld `ìniIalize `ìniIalizeìnsecure *
•  CREATE*USER ALTER*USER *
– SSL,*PASSWORD*EXPIRE,*ACCOUNT*[LOCK*|*UNLOCK]*
•  mysql.user Password authenIcaIon_string *
•  SET*PASSWORD PASSWORD() *
– ALTER*USER *
•  ENCRYPT,*DES_ENCRYPT,*DES_DECRYPT *AES
56
mysqld*`ìniIalize*`ùser=mysql
mysql_install_db*`ùser=mysql

Security&8&EncrypNon,&Passwords,&InstallaNon&
•  AES*256*EncrypIon*(Default*in*MySQL*5.7*)*
•  *
–  *
•  *
–  / *
–  ,* (test),* *
57*
[&Global&ConﬁguraNon&]&
SET*GLOBAL*default_password_lifeIme*=*180;*
[&Individual&user&accounts&]&
ALTER*USER*joro@sv1*PASSWORD*EXPIRE*INTERVAL*90*DAY;*
ALTER*USER*joro@sv1PASSWORD*EXPIRE*DEFAULT;*
ALTER*USER*joro@sv1PASSWORD*EXPIRE*NEVER;*

•  *
1 *
–  *
–  *
–  *
•  & *
*
•  *
MySQL*5.7:*MulI`Source*ReplicaIon*
Binlog*
Master*1*
Binlog*
Master*2*
…*
…*
Binlog*
Master*N*
IO*1*
Relay*1*
Coordinator*
W1* W2* …* WX*
IO*2*
Relay*2*
Coordinator*
W1* W2* …* WX*
…*
…*
Coordinator*
W1* W2* …* WX*
IO*N*
Relay*N*
Coordinator*
W1* W2* …* WX*
Slave&
58*

MySQL*5.7:*スキーマ内マルチスレッドスレーブ*
•  *
5 *
–  *
–  *
*
•  GTID*&* *
*
•  Sysbench*OLTP*test*
– 1,000
*
– SSD*/*48*core*HT*/*512*GB*RAM*
*
59*
0*
500*
1000*
1500*
2000*
2500*
3000*
3500*
4000*
4500*
5000*
0* 4* 16* 25* 50* 100* 200*
Worker&Threads&
Slave&TransacNons&per&Second&
Baseline*
50*clients*
100*clients*
150*clients*
200*clients*
88slave8parallel8type&
&
1.&DATABASE**:*(Default)*Use*the*db*parIIoned*MTS*(1*worker*per*database)*
2.&LOGICAL_CLOCK:**Use*logical*clock*based*parallelizaIon*mode.&

Copyright*©*201 *Oracle*and/or*its*affiliates.*All*rights*reserved.**|* 60
MySQL*Slave*ReplicaIon*Filters*Dynamic*
REPLICATE_DO_DB**
REPLICATE_IGNORE_DB**
REPLICATE_DO_TABLE**
REPLICATE_IGNORE_TABLE*
REPLICATE_WILD_DO_TABLE*
REPLICATE_WILD_IGNORE_TABLE*
REPLICATE_REWRITE_DB*
MySQL`5.7.3 “CHANGE'REPLICATION'FILTER”& *
*slave**
MySQL`5.7.3 OpIon (my.cnf)
MySQL
The*following*slave*replicaIon*filters*can*be*
changed*dynamically*using*this*command.
mysql>*STOP*SLAVE*SQL_THREAD;*
Query*OK,*0*rows*affected*(0.05*sec)*
mysql>*CHANGE*REPLICATION*FILTER*
REPLICATE_DO_DB=(db1);*
Query*OK,*0*rows*affected*(0.00*sec)
)*
MySQL85.7.38&Making&MySQL&Slave&ReplicaNon&Filters&Dynamic&

MySQL*Fabric*1.5:* *&* *
•  OpenStack* *
•  *
–  ;*
*
•  *
–  *
•  *
–  *
–  *
•  Fabric :*Python,*Java,*
PHP,*.NET,*C*(labs)*
–  *
*
62*
MySQL&Fabric&
Connector*
ApplicaIon*
Read8slaves&
mappings&
SQL&
HA&group&
Read8slaves&
HA&group&
Connector*
ApplicaIon*

MySQL*Labs
63

MySQL*Labs
•  *
–  *
•  MySQL MySQL*Cluster *
– MySQL*5.6*memcached*API*
– MySQL*Cluster*7.2*memcached*API*
– MySQL*5.6*Performance*Schema*
– MySQL*5.6*Intra`schema*MulI*Thread*Slave*
– MySQL*5.6*Online*Alter*Table*
– MySQL*5.7*MulI*Source*ReplicaIon*
– MySQL*5.7*New*OpImizer*Cost*Model

•  ” ” *
•  *
–  ( *
–  “OpImisIc*State*Machine”* *
•  *
–  *
–  / *
–  *
–  *
•  *
–  InnoDB*
–  GTID *
–  PERFORMANCE_SCHEMA*
MySQL*5.7:* *
ApplicaIon*
MySQL*Masters* ReplicaIon**
Plugin*
API*
MySQL*
Server*
Group*Comms*
(Corosync)*
65*
labs.mysql.com*

MySQL*Binlog*Events
Binlog&API
•  C++ *
•  *
– 2 "transport"*
– TCP*Transport*&*File*Transport*
•  *
–  *
•  API*
h^p://mysqlhighavailability.com/author/nehakumari/*
66

HTTP*Plugin*for*MySQL&
•  MySQL HTTP(S) *
•  UTF8 JSON *
•  3 *
– SQL*
– CRUD*`*Key`Value*
– JSON*`*Document*
•  For*more*details;*
h^p://www.slideshare.net/nixnutz/h^p`plugin`for`mysql`39598656*
67*

HTTP*Plugin*for*MySQL
The&SQL&endpoint&and&JSON&
68
shell> curl -X GET --user scott:tiger --url 'http://127.0.0.1:8080/sql/world/
SELECT+ID,Name+FROM+City+WHERE+Name=%27Tokyo%27'
[
{
"meta":[
{"type":,"catalog":"def","database":"world","table":"City","org_table":"ci
ty","column":"ID","org_column":"ID","charset":63,"length":11,"flags":
16899,"decimals":0},
{"type":
254,"catalog":"def","database":"world","table":"City","org_table":"city","column
":"Name","org_column":"Name","charset":33,"length":105,"flags":1,"decimals":0}
],
"data":[
["1532","Tokyo"]
],
"status":[{"server_status":34,"warning_count":0
}
]

HTTP*Plugin*for*MySQL*–*
SQL CRUD JSON&
URL h>p[s]://server:port/sql/ h>p[s]://server:port/crud/ h>p[s]://server:port/doc/
SQL CRUD CRUD
JSON *
SQL Yes No No
HTTP GET GET,&PUT.&DELETE GET,&PUT.&DELETE&
Yes No Yes
Yes Yes Yes
UTF88 UTF88 UTF88
Yes Yes Yes
69

MySQL*5.7:*JSON*
•  *
•  JSON *
–  *
•  JSON *
–  *
– SQL *
•  Generated*Columns( ) **
– InnoDB STORED VIRTUAL Generated*Columns *
–  *
•  h^p://mysqlserverteam.com/json`labs`release`overview/*
70*
RC2*

MySQL*5.7:*JSON
71
mysql> CREATE TABLE employees (ename JSON);
Query OK, 0 rows affected (0,01 sec)
mysql> INSERT INTO employees VALUES ('{"id": 1, "name": "Jane"}');
Query OK, 1 row affected (0,00 sec)
mysql> INSERT INTO employees VALUES ('{"id": 2, "name": "Joe"}');
Query OK, 1 row affected (0,00 sec)
mysql> SELECT * FROM employees;
+---------------------------+
| ename|
+---------------------------+
| {"id": 1, "name": "Jane"} |
| {"id": 2, "name": "Joe"} |
+---------------------------+
2 rows in set (0,00 sec)
RC2*

MySQL*5.7:*JSON
•  Document*ValidaIon*
– on*insert*only**
•  Eﬃcient*Access*
72
mysql> INSERT INTO employees VALUES ('some random text');
ERROR 3130 (22032): Invalid JSON text: "Expect a value here." at position 0 in
value (or column) 'some random text'.
mysql> SELECT JSON_EXTRACT(ename, '$.name') FROM employees;
+-------------------------------+
| JSON_EXTRACT(ename, '$.name') |
+-------------------------------+
| "Jane" |
| "Joe" |
+-------------------------------+
2 rows in set (0,00 sec)
RC2*

New*JSON*datatype:*Supported*Types
•  JSON *
–  Bool*
–  *
•  *
–  (dateIme) (Imestamp)*
– NULL*(5.7.9*)*
– 
73
RC2*

•  json_array()
–  Build*a*JSON*array*from*list*of*expressions*
•  json_object()
–  Builds*JSON*objects*from*a*variable*length*list*
of*key/value*pairs*
•  json_insert()
–  Adds*'missing'*data*to*JSON*documents*
•  json_remove()
–  Removes*a^ributes*from*exisIng*JSON*
documents*
•  json_set()
–  Sets*a^ributes*within*JSON*documents*
•  json_replace()
–  Replaces*(but*doesn't*add)*a^ributes*within*
JSON*documents*
•  json_append()
json_array_append()*(5.7.9+)*
–  Adds*a*value*to*the*end*of*an*array*
•  json_merge()
–  Merges*two*arrays**
•  json_extract()
–  Returns*a*value*nested*inside*of*a*JSON*
document*
74*
JSON*FuncIons*for*CreaIng*&*ManipulaIng*
*JSON*Documents*
RC2*

•  json_search()
–  Search*for*values*within*JSON*documents*and*
return*their*locaIons*
•  json_contains()
–  Checks*for*a*specific*element*and*value*
•  json_contains_path()
–  Determine*if*a*specific*element*is*present*in*a*
document*in*a*specific*posiIon*
•  json_valid()
–  Check*if*document*is*a*valid*JSON*document*
•  json_type()
–  Find*the*type*of*a*value*within*a*document*
•  json_keys()
–  Returns*arrays*of*the*key*names*for*the*JSON*
documents*
•  json_length()
–  Number*of*elements*in*JSON*document*
•  json_depth()
–  Level*of*nesIng*in*JSON*document*
•  json_unquote()
–  Helps*move*from*JSON*to*other*MySQL*types*
•  json_quote()
–  Helps*move*from*other*MySQL*types*to*JSON*
75*
Query*and*Search*JSON*FuncIons*
RC2*

Generated*Columns*`* &
•  Virtual*Generated*Column*
–  *
–  *
•  Stored*Generated*Column*
–  *
–  *
mysql> ALTER TABLE employees ADD iname VARCHAR(100)
GENERATED ALWAYS AS(json_extract(ename, '$.name')) VIRTUAL;
mysql> ALTER TABLE employees ADD INDEX(iname);
h^p://mysqlserverteam.com/*
76*
JSON &
RC2*

• 
*
–  JOIN*
–  *
– 
*
•  *
–  /
*
77*
?*

5.6&
MySQL&Server&8&GA&
InnoDB & &
&&&NoSQL &
MySQL&Cluster&8&GA&
2 NoSQL 200
SQL &
&
7.4&
5.7&
MySQL&Server&8&RC2&
&&& &
JSON Group&ReplicaNon &
78

MySQL
•  MySQL *
– h^p://www.mysql.gr.jp*
•  MySQL*5.6*
– h^p://dev.mysql.com/doc/refman/5.6/ja/index.html*
•  MySQL 1 MySQL *
– h^p://gihyo.jp/dev/serial/01/mysql`road`construcIon`news/0001*
•  MySQL *
– h^p://mysqlserverteam.com/*

*
80

[Java Küche RDB 最前線 2015] MySQL 5.7技術アップデート

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