ROADMAP.md

Roadmap

This document defines the roadmap for dble development.

SQL Layer

• DDL
• Query Plan
• Distributed Transactions
• High Performance LIMIT
• REPLACE Syntax
• Join (LEFT JOIN / RIGHT JOIN / CROSS JOIN)
• Union
• Simple Sub-query
• Correlated Sub-Query
• Functions support
  • Type Conversion in Expression Evaluation
  • Operators
  • Control Flow Functions
  • String Functions
  • Numeric Functions and Operators
  • Date and Time Functions
  • Cast Functions and Operators
  • Bit Functions and Operators
  • Aggregate (GROUP BY) Functions
• VIEW
• allowMultiQueries
• Charset
• System Variables
• User Variables
• Kill statement
• Show full tables
• MySQL5.7 Client/Server Protocol

Cluster

• Zookeeper
• Consul

Backend Connection Pool

• Correct Idle Conn Heartbeat
• Connection Version
• Smooth Offline

Optimization

• Global table
• ER table
• Push down Where Filter
• Simplify Where Filter
• Simplify SELECT

Remove

• Least frequently used algorithm
• Heterogeneous database
• Migrate Logic
• Other unused Code

Manager

• Add where filter
• show DDL status
• kill DDL & remove Lock
• reload metadata for special table
• reload metadata performance

Config

• Split schema.xml
• Split server.xml

Protocol

• COM_CHANGE_USER
• COM_RESET_CONNECTION
• COM_SET_OPTION

Other

• keep alive if just setting a manager user
• performance
• refactor global table check
• HA interface
• alert interface