GreptimeTeam/greptimedb

[Tracking issue] Add more JSON UDFs

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#4,805 opened on Oct 9, 2024

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C-featuregood first issuehelp wanted

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Description

What problem does the new feature solve?

The previous tracking issue #4230 introduced some basic JSON UDFs. This tracking issue aims to expand on that by adding more advanced UDFs, enabling more powerful querying capabilities.

What does the feature do?

  • JSON_OBJECT_KEYS Returns an Array containing the list of keys in the input JSON Object.
  • JSON_PATH_EXISTS Checks whether a specified path exists in JSON data.
  • JSON_PATH_MATCH Checks whether a specified JSON path expression matches certain conditions within a JSON data. ...

Implementation challenges

No response

Contributor guide

Research direction
Pick one unchecked subtask from the issue list (e.g., JSON OBJECT KEYS). Study the implementation of existing JSON UDFs in the codebase, then implement the new function with tests and documentation.
Tech stack
rust
Domain
backend
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
RustSQL
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40