DDL

🌐 RFC — Storage schema

Tasks

• Compare and swap (!470 (merged))
• Introduce DDL Instructions
  • Semantic: CreateSpace, DropSpace, CreateIndex, DropIndex
  • Wrappers: DdlPrepare, DdlCommit, DdlAbort
• Introduce system spaces (_pico_index, _pico_space)
• Implement DDL algorithm for CreateSpace:
  • Initiator (#263 (closed))
  • Governor
  • Every ordinary peer
    • On commit of Op::{DdlPrepare, DdlCommit, DdlAbort} (#261 (closed))
    • On request from governor to apply/abort changes (#262 (closed))
• Implement DDL DropSpace
  • Internals (#289 (closed))
  • API (#308 (closed))
• Implement DDL CreateIndex (#290 (closed))
• Implement DDL DropIndex (#291 (closed))
• Provide user-facing Lua/Rust API
• Test DDL in faulty network conditions
• Unhardcode DML from picodata system spaces (#264 (closed))
• Op::Ddl CreateSpace in snapshots (#265 (closed))
• Fix ddl on replicas (#292 (closed))
• Efficient handling of big snapshots #335 (closed)