apache/seatunnel

[Feature][ClickhouseSinkWriter Unsupported data type: JSON

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#9857 opened on Sep 12, 2025

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 (1 comment) (0 reactions) (1 assignee)Java (6,897 stars) (1,432 forks)batch import
help wanted

Description

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

Description

目前我需要将http报文的json数据中的某一个节点上的数据以json的形式写入到clickhouse中，seatunnel运行时，上报异常，提示“Caused by: java.lang.IllegalArgumentException: Unsupported data type: JSON”，我希望ClickhouseSinkWriter 后续能支持写JSON数据类型。

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

Tech stack
java
Domain
database
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
Java programmingSeaTunnel knowledgeClickhouse data types
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Investigate the ClickhouseSinkWriter implementation in SeaTunnel to understand how it currently handles data types. The issue reports that JSON type is unsupported; look for where data types are mapped or validated in the sink writer code. Review any existing discussions or comments in the issue for guidance on preferred approach.