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MySQL 8.0官方参考手册:涵盖NDB Cluster 8.0
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更新于2024-06-20
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"MySQL 8.0 Reference Manual 是MySQL官方的参考手册,包含了从MySQL 8.0到8.0.18的详细信息,以及基于NDB 8.0到8.0.18-NDB-8.0.18版本的NDB Cluster的相关内容。该手册可能涵盖了一些未发布的新功能,具体已发布的版本信息需参考MySQL 8.0的发行说明。此手册旨在提供全面的MySQL 8.0特性描述,并指出某些特性可能并非每个版本都包含,这取决于你的许可证。对于每个版本的更新变动,读者可查阅MySQL 8.0 Release Notes。此外,手册还提供了法律信息和使用MySQL的帮助论坛链接。最后更新日期为2019年6月22日,修订号为62443。"
MySQL 8.0 Reference Manual 是MySQL数据库系统的核心参考资料,涵盖了从基础概念到高级特性的广泛内容。以下是手册中可能涉及的一些关键知识点:
1. **SQL语法**:MySQL 8.0支持标准的SQL语言,包括数据查询、数据插入、更新和删除,以及复杂的联接操作和子查询。
2. **数据库管理**:如何创建、修改和删除数据库,以及管理用户权限和访问控制。
3. **表结构与数据类型**:详细讲解各种表的设计,如InnoDB和MyISAM存储引擎的区别,以及各种数据类型,如整数、浮点数、字符串和日期时间类型。
4. **索引与性能优化**:如何创建和使用索引来提升查询速度,包括B-Tree、Hash和Full-text索引,以及Explain命令的使用来分析查询执行计划。
5. **视图**:创建和管理虚拟表,方便复杂查询和数据抽象。
6. **触发器和存储过程**:在数据库级别实现业务逻辑,提高数据处理的自动化程度。
7. **事务处理**:介绍ACID属性,事务的开始、提交、回滚以及并发控制机制。
8. **分区和复制**:通过分区优化大数据量的查询,以及如何设置主从复制,实现数据的高可用性和容错性。
9. **NDB Cluster**:详细说明MySQL的集群解决方案,包括数据分布、容错性和性能增强特性。
10. **备份与恢复**:如何安全地备份数据库,以及在数据丢失或系统故障时进行恢复。
11. **新特性**:MySQL 8.0引入了许多新特性,如窗口函数、JSON支持、通用表表达式(CTE)和增强的行级锁定等。
12. **性能监控与调优**:提供工具和方法来监控数据库性能,如使用Performance Schema和sys schema。
13. **错误处理与日志**:关于错误代码的解释,以及如何配置和使用不同类型的日志,如查询日志、二进制日志等。
14. **安全性**:包括SSL连接、认证插件、加密选项以及最新的安全最佳实践。
15. **API与开发工具**:介绍如何使用不同的编程语言(如PHP、Python、Java等)连接MySQL,以及IDE和命令行工具的使用。
这个参考手册是MySQL开发者、管理员和任何需要深入理解MySQL 8.0功能的人员的必备资源。通过阅读和查阅,可以解决实际操作中的问题,优化数据库设计和性能,以及充分利用MySQL 8.0提供的强大功能。
MySQL 8.0 Reference Manual
xvi
15.17 InnoDB Backup and Recovery ................................................................................ 2830
15.17.1 InnoDB Backup ........................................................................................... 2831
15.17.2 InnoDB Recovery ........................................................................................ 2831
15.18 InnoDB and MySQL Replication ............................................................................. 2834
15.19 InnoDB memcached Plugin .................................................................................... 2836
15.19.1 Benefits of the InnoDB memcached Plugin ................................................... 2836
15.19.2 InnoDB memcached Architecture ................................................................. 2837
15.19.3 Setting Up the InnoDB memcached Plugin ................................................... 2841
15.19.4 InnoDB memcached Multiple get and Range Query Support .......................... 2846
15.19.5 Security Considerations for the InnoDB memcached Plugin ........................... 2849
15.19.6 Writing Applications for the InnoDB memcached Plugin ................................. 2850
15.19.7 The InnoDB memcached Plugin and Replication ........................................... 2863
15.19.8 InnoDB memcached Plugin Internals ............................................................ 2866
15.19.9 Troubleshooting the InnoDB memcached Plugin ........................................... 2870
15.20 InnoDB Troubleshooting ......................................................................................... 2872
15.20.1 Troubleshooting InnoDB I/O Problems ......................................................... 2873
15.20.2 Forcing InnoDB Recovery ........................................................................... 2873
15.20.3 Troubleshooting InnoDB Data Dictionary Operations ..................................... 2875
15.20.4 InnoDB Error Handling ................................................................................ 2876
16 Alternative Storage Engines ................................................................................................ 2879
16.1 Setting the Storage Engine ...................................................................................... 2882
16.2 The MyISAM Storage Engine ................................................................................... 2883
16.2.1 MyISAM Startup Options ............................................................................... 2886
16.2.2 Space Needed for Keys ................................................................................ 2888
16.2.3 MyISAM Table Storage Formats .................................................................... 2888
16.2.4 MyISAM Table Problems ............................................................................... 2890
16.3 The MEMORY Storage Engine ................................................................................ 2892
16.4 The CSV Storage Engine ........................................................................................ 2896
16.4.1 Repairing and Checking CSV Tables ............................................................. 2897
16.4.2 CSV Limitations ............................................................................................ 2898
16.5 The ARCHIVE Storage Engine ................................................................................. 2898
16.6 The BLACKHOLE Storage Engine ........................................................................... 2899
16.7 The MERGE Storage Engine ................................................................................... 2902
16.7.1 MERGE Table Advantages and Disadvantages .............................................. 2904
16.7.2 MERGE Table Problems ............................................................................... 2905
16.8 The FEDERATED Storage Engine ........................................................................... 2906
16.8.1 FEDERATED Storage Engine Overview ......................................................... 2907
16.8.2 How to Create FEDERATED Tables .............................................................. 2908
16.8.3 FEDERATED Storage Engine Notes and Tips ................................................ 2910
16.8.4 FEDERATED Storage Engine Resources ....................................................... 2912
16.9 The EXAMPLE Storage Engine ................................................................................ 2912
16.10 Other Storage Engines .......................................................................................... 2912
16.11 Overview of MySQL Storage Engine Architecture .................................................... 2912
16.11.1 Pluggable Storage Engine Architecture ........................................................ 2913
16.11.2 The Common Database Server Layer .......................................................... 2913
17 Replication ......................................................................................................................... 2915
17.1 Configuring Replication ............................................................................................ 2916
17.1.1 Binary Log File Position Based Replication Configuration Overview ................. 2917
17.1.2 Setting Up Binary Log File Position Based Replication .................................... 2917
17.1.3 Replication with Global Transaction Identifiers ................................................ 2927
17.1.4 MySQL Multi-Source Replication ................................................................... 2948
17.1.5 Changing Replication Modes on Online Servers ............................................. 2952
17.1.6 Replication and Binary Logging Options and Variables .................................... 2957
17.1.7 Common Replication Administration Tasks ..................................................... 3054
17.2 Replication Implementation ...................................................................................... 3057
17.2.1 Replication Formats ...................................................................................... 3057
17.2.2 Replication Implementation Details ................................................................ 3064
17.2.3 Replication Channels .................................................................................... 3066
MySQL 8.0 Reference Manual
xvii
17.2.4 Replication Relay and Status Logs ................................................................ 3069
17.2.5 How Servers Evaluate Replication Filtering Rules ........................................... 3075
17.3 Replication Solutions ............................................................................................... 3082
17.3.1 Using Replication for Backups ....................................................................... 3082
17.3.2 Handling an Unexpected Halt of a Replication Slave ....................................... 3086
17.3.3 Monitoring Row-based Replication ................................................................. 3088
17.3.4 Using Replication with Different Master and Slave Storage Engines ................. 3088
17.3.5 Using Replication for Scale-Out ..................................................................... 3090
17.3.6 Replicating Different Databases to Different Slaves ........................................ 3091
17.3.7 Improving Replication Performance ................................................................ 3092
17.3.8 Switching Masters During Failover ................................................................. 3093
17.3.9 Setting Up Replication to Use Encrypted Connections .................................... 3095
17.3.10 Encrypting Binary Log Files and Relay Log Files .......................................... 3097
17.3.11 Semisynchronous Replication ...................................................................... 3100
17.3.12 Delayed Replication .................................................................................... 3106
17.4 Replication Notes and Tips ...................................................................................... 3108
17.4.1 Replication Features and Issues .................................................................... 3108
17.4.2 Replication Compatibility Between MySQL Versions ....................................... 3133
17.4.3 Upgrading a Replication Setup ...................................................................... 3134
17.4.4 Troubleshooting Replication .......................................................................... 3135
17.4.5 How to Report Replication Bugs or Problems ................................................. 3136
18 Group Replication .............................................................................................................. 3139
18.1 Group Replication Background ................................................................................. 3140
18.1.1 Replication Technologies ............................................................................... 3141
18.1.2 Group Replication Use Cases ....................................................................... 3142
18.1.3 Group Replication Details .............................................................................. 3143
18.2 Getting Started ........................................................................................................ 3144
18.2.1 Deploying Group Replication in Single-Primary Mode ...................................... 3144
18.3 Monitoring Group Replication ................................................................................... 3156
18.3.1 Group Replication Server States .................................................................... 3156
18.3.2 The replication_group_members Table .......................................................... 3157
18.3.3 The replication_group_member_stats Table ................................................... 3158
18.4 Group Replication Operations .................................................................................. 3158
18.4.1 Deploying in Multi-Primary or Single-Primary Mode ......................................... 3158
18.4.2 Configuring an Online Group ......................................................................... 3160
18.4.3 Transaction Consistency Guarantees ............................................................. 3164
18.4.4 Tuning Recovery .......................................................................................... 3170
18.4.5 Network Partitioning ...................................................................................... 3172
18.4.6 Support For IPv6 And For Mixed IPv6 And IPv4 Groups ................................. 3176
18.4.7 Using MySQL Enterprise Backup with Group Replication ................................ 3178
18.5 Group Replication Security ....................................................................................... 3184
18.5.1 Group Replication IP Address Whitelisting ..................................................... 3184
18.5.2 Group Replication Secure Socket Layer (SSL) Support ................................... 3186
18.6 Group Replication Performance ................................................................................ 3189
18.6.1 Fine Tuning the Group Communication Thread .............................................. 3190
18.6.2 Flow Control ................................................................................................. 3190
18.6.3 Message Compression .................................................................................. 3191
18.6.4 Message Fragmentation ................................................................................ 3193
18.6.5 XCom Cache Management ........................................................................... 3194
18.6.6 Responses to Failure Detection and Network Partitioning ................................ 3194
18.7 Upgrading Group Replication ................................................................................... 3197
18.7.1 Group Replication Offline Upgrade ................................................................ 3197
18.7.2 Group Replication Online Upgrade ................................................................ 3197
18.8 Group Replication System Variables ......................................................................... 3202
18.9 Requirements and Limitations .................................................................................. 3231
18.9.1 Group Replication Requirements ................................................................... 3231
18.9.2 Group Replication Limitations ........................................................................ 3233
18.10 Frequently Asked Questions ................................................................................... 3235
MySQL 8.0 Reference Manual
xviii
18.11 Group Replication Technical Details ....................................................................... 3239
18.11.1 Group Replication Plugin Architecture .......................................................... 3239
18.11.2 The Group .................................................................................................. 3241
18.11.3 Data Manipulation Statements ..................................................................... 3241
18.11.4 Data Definition Statements .......................................................................... 3241
18.11.5 Distributed Recovery ................................................................................... 3242
18.11.6 Observability ............................................................................................... 3248
19 MySQL Shell ...................................................................................................................... 3251
20 Using MySQL as a Document Store ................................................................................... 3253
20.1 Interfaces to a MySQL Document Store .................................................................... 3254
20.2 Document Store Concepts ....................................................................................... 3254
20.3 JavaScript Quick-Start Guide: MySQL Shell for Document Store ................................ 3255
20.3.1 Import Database Sample ............................................................................... 3255
20.3.2 MySQL Shell ................................................................................................ 3256
20.3.3 Documents and Collections ........................................................................... 3258
20.3.4 Relational Tables .......................................................................................... 3268
20.3.5 Documents in Tables .................................................................................... 3274
20.4 Python Quick-Start Guide: MySQL Shell for Document Store ..................................... 3275
20.4.1 Import Database Sample ............................................................................... 3275
20.4.2 MySQL Shell ................................................................................................ 3276
20.4.3 Documents and Collections ........................................................................... 3278
20.4.4 Relational Tables .......................................................................................... 3288
20.4.5 Documents in Tables .................................................................................... 3294
20.5 X Plugin .................................................................................................................. 3295
20.5.1 Checking X Plugin Installation ....................................................................... 3295
20.5.2 Disabling X Plugin ........................................................................................ 3295
20.5.3 Using Secure Connections with X Plugin ....................................................... 3295
20.5.4 Using X Plugin with the Caching SHA-2 Authentication Plugin ......................... 3296
20.5.5 X Plugin Options and Variables ..................................................................... 3296
20.5.6 Monitoring X Plugin ...................................................................................... 3307
21 InnoDB Cluster ................................................................................................................... 3313
21.1 Introducing InnoDB Cluster ...................................................................................... 3313
21.2 Creating an InnoDB Cluster ..................................................................................... 3315
21.2.1 Deployment Scenarios .................................................................................. 3315
21.2.2 InnoDB Cluster Requirements ....................................................................... 3316
21.2.3 Methods of Installing ..................................................................................... 3316
21.2.4 Production Deployment of InnoDB Cluster ..................................................... 3317
21.2.5 Sandbox Deployment of InnoDB Cluster ........................................................ 3326
21.2.6 Adopting a Group Replication Deployment ..................................................... 3329
21.3 Using MySQL Router with InnoDB Cluster ................................................................ 3330
21.4 Working with InnoDB Cluster ................................................................................... 3333
21.5 Known Limitations ................................................................................................... 3358
22 MySQL NDB Cluster 8.0 .................................................................................................... 3359
22.1 NDB Cluster Overview ............................................................................................. 3363
22.1.1 NDB Cluster Core Concepts .......................................................................... 3364
22.1.2 NDB Cluster Nodes, Node Groups, Replicas, and Partitions ............................ 3367
22.1.3 NDB Cluster Hardware, Software, and Networking Requirements .................... 3369
22.1.4 What is New in NDB Cluster ......................................................................... 3371
22.1.5 Options, Variables, and Parameters Added, Deprecated or Removed in NDB
8.0 .......................................................................................................................... 3377
22.1.6 MySQL Server Using InnoDB Compared with NDB Cluster ............................. 3378
22.1.7 Known Limitations of NDB Cluster ................................................................. 3381
22.2 NDB Cluster Installation ........................................................................................... 3391
22.2.1 The NDB Cluster Auto-Installer ...................................................................... 3393
22.2.2 Installation of NDB Cluster on Linux .............................................................. 3414
22.2.3 Installing NDB Cluster on Windows ............................................................... 3422
22.2.4 Initial Configuration of NDB Cluster ............................................................... 3431
22.2.5 Initial Startup of NDB Cluster ........................................................................ 3433
MySQL 8.0 Reference Manual
xix
22.2.6 NDB Cluster Example with Tables and Data .................................................. 3434
22.2.7 Safe Shutdown and Restart of NDB Cluster ................................................... 3437
22.2.8 Upgrading and Downgrading NDB Cluster ..................................................... 3438
22.3 Configuration of NDB Cluster ................................................................................... 3439
22.3.1 Quick Test Setup of NDB Cluster .................................................................. 3439
22.3.2 Overview of NDB Cluster Configuration Parameters, Options, and Variables ..... 3441
22.3.3 NDB Cluster Configuration Files .................................................................... 3460
22.3.4 Using High-Speed Interconnects with NDB Cluster ......................................... 3639
22.4 NDB Cluster Programs ............................................................................................ 3639
22.4.1 ndbd — The NDB Cluster Data Node Daemon .............................................. 3640
22.4.2 ndbinfo_select_all — Select From ndbinfo Tables .................................. 3647
22.4.3 ndbmtd — The NDB Cluster Data Node Daemon (Multi-Threaded) ................. 3649
22.4.4 ndb_mgmd — The NDB Cluster Management Server Daemon ......................... 3650
22.4.5 ndb_mgm — The NDB Cluster Management Client ......................................... 3658
22.4.6 ndb_blob_tool — Check and Repair BLOB and TEXT columns of NDB
Cluster Tables ......................................................................................................... 3660
22.4.7 ndb_config — Extract NDB Cluster Configuration Information ...................... 3662
22.4.8 ndb_delete_all — Delete All Rows from an NDB Table ............................. 3671
22.4.9 ndb_desc — Describe NDB Tables .............................................................. 3672
22.4.10 ndb_drop_index — Drop Index from an NDB Table ................................... 3678
22.4.11 ndb_drop_table — Drop an NDB Table ................................................... 3679
22.4.12 ndb_error_reporter — NDB Error-Reporting Utility ................................. 3679
22.4.13 ndb_import — Import CSV Data Into NDB ................................................ 3681
22.4.14 ndb_index_stat — NDB Index Statistics Utility ......................................... 3694
22.4.15 ndb_move_data — NDB Data Copy Utility ................................................. 3699
22.4.16 ndb_perror — Obtain NDB Error Message Information .............................. 3702
22.4.17 ndb_print_backup_file — Print NDB Backup File Contents ................... 3704
22.4.18 ndb_print_file — Print NDB Disk Data File Contents .............................. 3704
22.4.19 ndb_print_frag_file — Print NDB Fragment List File Contents .............. 3705
22.4.20 ndb_print_schema_file — Print NDB Schema File Contents .................. 3705
22.4.21 ndb_print_sys_file — Print NDB System File Contents ......................... 3706
22.4.22 ndb_redo_log_reader — Check and Print Content of Cluster Redo Log .... 3706
22.4.23 ndb_restore — Restore an NDB Cluster Backup ....................................... 3709
22.4.24 ndb_select_all — Print Rows from an NDB Table ................................... 3730
22.4.25 ndb_select_count — Print Row Counts for NDB Tables ........................... 3733
22.4.26 ndb_setup.py — Start browser-based Auto-Installer for NDB Cluster .......... 3734
22.4.27 ndb_show_tables — Display List of NDB Tables ....................................... 3738
22.4.28 ndb_size.pl — NDBCLUSTER Size Requirement Estimator ...................... 3739
22.4.29 ndb_top — View CPU usage information for NDB threads ........................... 3742
22.4.30 ndb_waiter — Wait for NDB Cluster to Reach a Given Status ..................... 3747
22.4.31 Options Common to NDB Cluster Programs — Options Common to NDB
Cluster Programs .................................................................................................... 3750
22.5 Management of NDB Cluster ................................................................................... 3755
22.5.1 Summary of NDB Cluster Start Phases .......................................................... 3756
22.5.2 Commands in the NDB Cluster Management Client ........................................ 3757
22.5.3 Online Backup of NDB Cluster ...................................................................... 3762
22.5.4 MySQL Server Usage for NDB Cluster .......................................................... 3767
22.5.5 Performing a Rolling Restart of an NDB Cluster ............................................. 3769
22.5.6 Event Reports Generated in NDB Cluster ...................................................... 3771
22.5.7 NDB Cluster Log Messages .......................................................................... 3781
22.5.8 NDB Cluster Single User Mode ..................................................................... 3796
22.5.9 Quick Reference: NDB Cluster SQL Statements ............................................. 3797
22.5.10 ndbinfo: The NDB Cluster Information Database ........................................... 3800
22.5.11 INFORMATION_SCHEMA Tables for NDB Cluster ....................................... 3847
22.5.12 NDB Cluster Security Issues ....................................................................... 3848
22.5.13 NDB Cluster Disk Data Tables .................................................................... 3854
22.5.14 Online Operations with ALTER TABLE in NDB Cluster .................................. 3862
22.5.15 Adding NDB Cluster Data Nodes Online ...................................................... 3865
MySQL 8.0 Reference Manual
xx
22.5.16 Distributed MySQL Privileges (Not Supported) .............................................. 3876
22.5.17 NDB API Statistics Counters and Variables .................................................. 3876
22.6 NDB Cluster Replication .......................................................................................... 3887
22.6.1 NDB Cluster Replication: Abbreviations and Symbols ..................................... 3888
22.6.2 General Requirements for NDB Cluster Replication ........................................ 3889
22.6.3 Known Issues in NDB Cluster Replication ...................................................... 3890
22.6.4 NDB Cluster Replication Schema and Tables ................................................. 3896
22.6.5 Preparing the NDB Cluster for Replication ..................................................... 3898
22.6.6 Starting NDB Cluster Replication (Single Replication Channel) ........................ 3900
22.6.7 Using Two Replication Channels for NDB Cluster Replication .......................... 3902
22.6.8 Implementing Failover with NDB Cluster Replication ....................................... 3903
22.6.9 NDB Cluster Backups With NDB Cluster Replication ....................................... 3904
22.6.10 NDB Cluster Replication: Multi-Master and Circular Replication ...................... 3910
22.6.11 NDB Cluster Replication Conflict Resolution ................................................. 3914
22.7 NDB Cluster Release Notes ..................................................................................... 3928
23 Partitioning ......................................................................................................................... 3929
23.1 Overview of Partitioning in MySQL ........................................................................... 3930
23.2 Partitioning Types .................................................................................................... 3933
23.2.1 RANGE Partitioning ...................................................................................... 3934
23.2.2 LIST Partitioning ........................................................................................... 3939
23.2.3 COLUMNS Partitioning ................................................................................. 3941
23.2.4 HASH Partitioning ......................................................................................... 3948
23.2.5 KEY Partitioning ........................................................................................... 3951
23.2.6 Subpartitioning .............................................................................................. 3953
23.2.7 How MySQL Partitioning Handles NULL ........................................................ 3955
23.3 Partition Management .............................................................................................. 3959
23.3.1 Management of RANGE and LIST Partitions .................................................. 3960
23.3.2 Management of HASH and KEY Partitions ..................................................... 3966
23.3.3 Exchanging Partitions and Subpartitions with Tables ....................................... 3967
23.3.4 Maintenance of Partitions .............................................................................. 3974
23.3.5 Obtaining Information About Partitions ........................................................... 3976
23.4 Partition Pruning ...................................................................................................... 3978
23.5 Partition Selection .................................................................................................... 3981
23.6 Restrictions and Limitations on Partitioning ............................................................... 3986
23.6.1 Partitioning Keys, Primary Keys, and Unique Keys ......................................... 3991
23.6.2 Partitioning Limitations Relating to Storage Engines ........................................ 3995
23.6.3 Partitioning Limitations Relating to Functions .................................................. 3996
24 Stored Objects ................................................................................................................... 3999
24.1 Defining Stored Programs ........................................................................................ 4000
24.2 Using Stored Routines ............................................................................................. 4001
24.2.1 Stored Routine Syntax .................................................................................. 4002
24.2.2 Stored Routines and MySQL Privileges ......................................................... 4002
24.2.3 Stored Routine Metadata .............................................................................. 4003
24.2.4 Stored Procedures, Functions, Triggers, and LAST_INSERT_ID() .................... 4003
24.3 Using Triggers ......................................................................................................... 4003
24.3.1 Trigger Syntax and Examples ........................................................................ 4004
24.3.2 Trigger Metadata .......................................................................................... 4007
24.4 Using the Event Scheduler ...................................................................................... 4008
24.4.1 Event Scheduler Overview ............................................................................ 4008
24.4.2 Event Scheduler Configuration ...................................................................... 4009
24.4.3 Event Syntax ................................................................................................ 4011
24.4.4 Event Metadata ............................................................................................ 4011
24.4.5 Event Scheduler Status ................................................................................. 4012
24.4.6 The Event Scheduler and MySQL Privileges .................................................. 4013
24.5 Using Views ............................................................................................................ 4015
24.5.1 View Syntax ................................................................................................. 4016
24.5.2 View Processing Algorithms .......................................................................... 4016
24.5.3 Updatable and Insertable Views .................................................................... 4017
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