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cassandra-schema's Introduction

Goals

Concept

  • Developer writes GO structures with metadata (field tags & helper methods)
  • SQL DDL scrips are generated from the GO structures
  • Connectivity to existing schema is needed to generate alter statements but tool needs to work also without connecitivity (then it generates new schema with tables, UDTs etc.)

Iterations

Iteration 1 - struct -> DDL

  • Generating new schema (in this iteration there is no need to connect to existing cassandra schema because no alter statments are calulated yet)
  • Primary Keys
  • Default mapping for go types to cassandra types

Iteration 2 - struct -> DDL

  • Indexes
  • UDTs
  • customizable mapping of go types to cassandra types using new GO structure field tags

Iteration 3 - diff DDLs

  • Alter table/type statements

Iteration 4 - integration & doc

  • showcase how all four tools work together during upgrade procedure (deploying new version of microservice)
  • describe everything in documentation with example/tutorial

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