This topic provides an overview of the features provided by AliSQL. It also provides a comparison between MySQL versions with AliSQL and other MySQL versions.
Introduction to AliSQL
AliSQL is an independent MySQL branch that is customized by Alibaba Cloud. AliSQL provides all of the features that are available in the MySQL Community Edition and some similar features that you can find in the MySQL Enterprise Edition. These similar features include enterprise-grade backup and restoration, thread pool, and parallel query. AliSQL also provides features such as sequence engines that are compatible with Oracle. ApsaraDB RDS for MySQL with AliSQL provides all the basic features of MySQL and a wide range of advanced features such as enterprise-grade security, backup, restoration, monitoring, performance optimization, and read-only instances.
MySQL versions supported
| Feature | Description | MySQL 8.0 | MySQL 5.7 | MySQL 5.6 |
|---|---|---|---|---|
| Statement concurrency control | The concurrency control (CCL) feature allows you to control the concurrency of statements based on syntax rules. You can install the DBMS_CCL package to use this feature. | Supported | Supported | Not supported |
| Statement outline | The statement outline feature allows you to stably run query plans by using optimizer and index hints. You can install the DBMS_OUTLN package to use this feature. | Supported | Supported | Not supported |
| A new version is available. | The recycle bin feature allows you to temporarily store deleted tables. It also allows you to specify a retention period within which you can retrieve the deleted tables. You can install the DBMS_RECYCLE package to use this feature. | Supported | Not supported | Not supported |
| Thread Pool | The thread pool feature separates threads from sessions. If a large number of sessions are created on your RDS instance, you can run a small number of threads to complete the tasks in active sessions. | Supported | Supported | Supported |
| Sequence Engine | The Sequence engine simplifies the generation of sequence values on your ApsaraDB RDS for MySQL instance. | Supported | Not supported | Supported |
| Performance Insight | The performance insight feature supports load monitoring, association analysis, and performance optimization at the instance level. You can evaluate loads on your ApsaraDB RDS for MySQL instance and resolve performance issues. This allows you to ensure the stability of your RDS instance. | Supported | Supported | Not supported |
| Purge Large File Asynchronously | The Purge Large File Asynchronously feature allows you to asynchronously delete files from your ApsaraDB RDS for MySQL instance. This ensures the stability of your RDS instance. | Supported | Supported | Supported |
| Returning | This returning feature allows data manipulation language (DML) statements to return result sets. You can install the DBMS_TRANS package to use this feature. | Supported | Not supported | Not supported |
| Statement Queue | The statement queue feature allows statements to queue in the same bucket. These statements may be executed on the same resources. For example, these statements are executed on the same row of a table. This reduces overheads from possible conflicts. | Supported | Supported | Not supported |
| Inventory Hint | The inventory hint feature can work with the returning and statement queue features to rapidly commit and roll back transactions. This allows you to increase the throughput of your application. | Supported | Supported | Supported |
| Performance Agent | The performance agent feature is provided as a plug-in of MySQL. You can use this feature to calculate and analyze the performance metrics of your ApsaraDB RDS for MySQL instance. | Supported | Supported | Supported |
| A new version is available. | The fast query cache is a query cache that is developed by Alibaba Cloud based on the native MySQL query cache. The fast query cache uses a new design and implementation mechanism to increase the query performance of your ApsaraDB RDS for MySQL instance. | Not supported | Supported | Not supported |
| Data Protect | The data protect feature controls the permissions on delete operations. This allows you to protect your data from being accidentally deleted. | Supported | Supported | Supported |
| Binlog in Redo | The Binlog in Redo feature synchronously writes binary logs to the redo log file when a transaction is committed. This reduces operations on disks and improves the performance of your ApsaraDB RDS for MySQL instance. | Supported | Not supported | Not supported |
| Faster DDL | The faster DDL feature provides an optimized buffer pool management mechanism. This mechanism reduces the impact of DDL operations on the performance of your ApsaraDB RDS for MySQL instance. This mechanism also increases the number of concurrent DDL operations that are allowed. | Supported | Supported | Supported |
Features
| Category | Feature | MySQL Community Edition | MySQL Enterprise Edition | MySQL 5.7 and MySQL 8.0 with AliSQL | ApsaraDB RDS for MySQL |
|---|---|---|---|---|---|
| Enterprise-grade value-added services | 24/7 support | Not supported | Supported | Supported | Supported |
| Emergency troubleshooting | Not supported | Supported | Supported | Supported | |
| Expert support | Not supported | Supported | Supported | Supported | |
| MySQL features | MySQL Database Server | Supported | Supported | Supported | Supported |
| MySQL Document Store | Supported | Supported | Supported for MySQL 8.0 | Supported for MySQL 8.0 | |
| MySQL Connectors | Supported | Supported | Supported for versions released to the public | Supported for versions released to the public | |
| MySQL Replication | Supported | Supported | Supported | Supported | |
| MySQL Router | Supported | Supported | MaxScale supported for MySQL 8.0 | Single-tenant database proxies supported | |
| MySQL Partitioning | Supported | Supported | Supported | Supported | |
| Storage Engine |
InnoDB MyISAM NDB |
InnoDB MyISAM NDB |
InnoDB X-Engine |
InnoDB X-Engine |
|
| Oracle Compatibility | Sequence Engine | Not supported | Not supported | Supported for MySQL 8.0 | Supported for MySQL 8.0 |
| MySQL Enterprise Monitor | Enterprise Dashboard | Not supported | Supported | Under development | Enhanced Monitor |
| Query Analyzer | Not supported | Supported | Under development | Performance Insight | |
| Replication Monitor | Not supported | Supported | Under development | Supported | |
| Enhanced OS Metrics | Not supported | Not supported | Not supported | Enhanced Monitor | |
| MySQL Enterprise Backup | Hot backup for InnoDB | Not supported | Supported | Supported | Supported |
| Full, Incremental, Partial, Optimistic Backups | Not supported | Supported | Supported | Database- and table-level backup supported | |
| Full, Partial, Selective, Hot Selective restore | Not supported | Supported | Supported | Database-level and table-level restoration supported | |
| Point-In-Time-Recovery | Not supported | Supported | Supported | Supported | |
| Cross-Region Backup | Not supported | Not supported | Not supported | Cross-region backup | |
| Recycle bin | Not supported | Not supported | Supported for MySQL 8.0 | Supported for MySQL 8.0 | |
| Flashback | Not supported | Not supported | Supported | Supported | |
| MySQL Enterprise Security | Enterprise TDE | Local key replacement supported | Supported | BYOK-based TDE and key rotation supported | BYOK-based TDE and key rotation supported |
| Enterprise Disk Data Encryption at Rest | Not supported | Not supported | Not supported | BYOK-based disk encryption | |
| Enterprise Encryption | SSL | Supported | SSL | SSL | |
| Enterprise Audit | Not supported | Supported | SQL explorer | SQL explorer | |
| SM4 encryption algorithm | Not supported | Not supported | Supported | Supported | |
| MySQL Enterprise Scalability | Thread Pool | Not supported | Supported | Supported for MySQL 8.0 | Supported for MySQL 8.0 |
| Enterprise Readonly Request Extention | Not supported | Not supported | Supported | Read-only instances | |
| MySQL Enterprise Reliability | SQL Outline | Not supported | Not supported | Supported | Supported |
| Hot Massive Update | Not supported | Not supported | Supported | Supported | |
| Hot SQL Limit | Not supported | Not supported | Supported | Supported | |
| Hot SQL Firewall | Not supported | Not supported | Supported | Supported | |
| MySQL Enterprise High-Availability | Enterprise Automatic Failover Switch | Not supported | Not supported | Third-party high-availability mechanism required | Supported for the RDS High-availability Edition |
| Multi-Source Replication | Supported | Supported | Supported | Highly available read-only instances supported |