apache/fluss-rust

Schema validations to match Java

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#324 opened on Feb 14, 2026

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 (4 comments) (0 reactions) (1 assignee)Rust (48 forks)auto 404
good first issue

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Description

Search before asking

  • I searched in the issues and found nothing similar.

Description

Add missing schema validations in SchemaBuilder::build() to match Java's Schema.normalizeColumns():

  • reject duplicate PK columns
  • require auto-increment columns to be INT/BIGINT and not part of the primary key
  • require a primary key when auto-increment is used
  • reject empty/whitespace column names and constraint names
  • etc that makes sense in the current state

Willingness to contribute

  • I'm willing to submit a PR!

Contributor guide

Research direction
Implement the missing schema validations as described, referencing the Java implementation for guidance.
Tech stack
rust
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70