databendlabs/jsonb

Tracking: Support the full JSON Path language

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#12 opened on Apr 20, 2023

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good first issuehelp wanted

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Description

JSON path has already implemented the basic elements accessors and comparison predicates filter expression, in order to support the full JSON Path language, the following tasks need to be done further.

  • Variables:
    • Variables
  • Modes:
    • lax
    • strict
  • Item methods:
    • type()
    • size()
    • double()
    • ceiling()
    • floor()
    • abs()
    • datetime()
    • keyvalue()
  • Arithmetic expressions
    • Unary + or -
    • Binary +, -, *, /, %
  • Filter expression
    • exists path predicate
    • like_regex predicate
    • starts with predicate
    • is unknown predicate

The syntax and functionality of JSON Path should be implemented in accordance with the SQL:2016 (ISO/IEC 9075:2016) standard. Here are some references:

Contributor guide

Research direction
Study the SQL:2016 JSON Path standard and implement the missing variables, modes, item methods, and filter predicates.
Tech stack
rust
Domain
backenddatabase
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Over 1 week
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
RustJSONSQL
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20