apache/pinot

Enhance table config validation on index type compatibility

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#17398 opened on Dec 18, 2025

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 (3 comments) (0 reactions) (1 assignee)Java (4,937 stars) (1,234 forks)batch import
enhancementhelp wanteduser-experience

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

Tech stack
java
Domain
backenddatabase
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.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
JavaPinot table configIndex types
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
The issue is to enhance index type compatibility validation in TableConfigUtils.validate(). First, identify all supported index types in Pinot (e.g., inverted, sorted, text, etc.) by reviewing documentation or source code. Then, list all incompatible combinations (e.g., inverted index requires dictionary enabled). The existing validation logic is in TableConfigUtils.validate(TableConfig, Schema). Implement exhaustive checks for each combination. Since the issue has an assignee, check the linked PR or discussion for any progress. The codebase uses Java, so contribute by writing unit tests or extending the validation method.