trinodb/trino

Test Ignite handling of decimal type with negative scale

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#28416 opened on Feb 23, 2026

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 (1 comment) (0 reactions) (0 assignees)Java (9,113 stars) (2,678 forks)batch import
good first issueignite

Description

The connector claims support for decimal with negative scale

https://github.com/trinodb/trino/blob/dfd75cf4f92c5bbe4929375e701a31e5d8c548c4/plugin/trino-ignite/src/main/java/io/trino/plugin/ignite/IgniteClient.java#L253

it's not tested and may not work

Contributor guide

Tech stack
javasql
Domain
backendtesting
Issue type
test
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.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaTrino plugin testingSQL decimal types
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
Examine IgniteClient.java line 253 which claims support for decimal with negative scale. Review referenced issues #28388 and PR #28414 for context on the expected behavior and any known issues. Look at existing tests in the Trino Ignite plugin to follow patterns for writing a new test case that exercises negative scale decimal handling. Implement the test and verify it passes.