apache/pinot

Enhance table config validation on index type compatibility

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#17,398 opened on Dec 18, 2025

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 (5 comments) (0 reactions) (1 assignee)Java (1,234 forks)batch import
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Description

We should enhance index type compatibility check in table config validation. E.g. inverted index enabled column must have dictionary enabled.

We should list down all supported index types, and do an exhaustive check on all incompatible combinations.

For code reference, table config validation is performed in TableConfigUtils.validate(TableConfig tableConfig, Schema schema)

Contributor guide

Research direction
Look at TableConfigUtils.validate for existing validation logic. List all index types from the IndexType enum. Identify incompatible combinations (e.g., inverted index requires dictionary) and add checks.
Tech stack
java
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.
Mostly clear
Prerequisites
JavaGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60