Add ScalarFunction for JSON_EXTRACT_SCALAR

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Avg merge 7d 17h (Avg merge 7d 17h)190 merged PRs in 30d (190 merged PRs in 30d)

Description

Contributor guide

Research direction

Examine existing ScalarFunction implementations (e.g., in org.apache.pinot.core.geospatial or other modules) to understand the pattern. Look at the current JSON EXTRACT SCALAR function in the parser or query engine. The issue requests a counterpart that returns a scalar value. Check the Pinot documentation and related PRs or comments for guidance on where to add this function.

Tech stack

java

Domain

databasebackend

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.

1-3 hours

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

Java experienceFamiliarity with Pinot's ScalarFunctionUnderstanding of JSON functions

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40