apache/seatunnel

[Feature][Core] Support define all nested types

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#9,744 opened on Aug 21, 2025

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Description

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  • I had searched in the feature and found no similar feature requirement.

Description

Currently, our API design has limited support for nested data structures, and we need to support the definition and processing of any nested data types. Please refer https://github.com/apache/seatunnel/blob/45609ef1dfd88d4844a90eec0d0984b1797e44d4/seatunnel-api/src/main/java/org/apache/seatunnel/api/table/type/ArrayType.java#L22 and https://github.com/apache/seatunnel/blob/45609ef1dfd88d4844a90eec0d0984b1797e44d4/seatunnel-api/src/main/java/org/apache/seatunnel/api/table/type/MapType.java#L30

Usage Scenario

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Related issues

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Are you willing to submit a PR?

  • Yes I am willing to submit a PR!

Code of Conduct

Contributor guide

Research direction
Study the existing type hierarchy in seatunnel api (ArrayType, MapType). Design a generic nested type class that can represent arbitrary nesting. Then modify the API to accept and process these nested types. Check related tests.
Tech stack
java
Domain
backendapi
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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
JavaData structures
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60