trinodb/trino

Add function to convert strings to title case.

Open

#2,942 opened on Feb 25, 2020

View on GitHub
 (20 comments) (1 reaction) (0 assignees)Java (9,113 stars) (2,678 forks)batch import
enhancementgood first issuesyntax-needs-review

Description

According to the Presto docs, there is not currently a function to convert a string to title case.

Contributor guide

Tech stack
javasql
Domain
database
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.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Java knowledgeFamiliarity with Trino SQL engine
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Look at existing string functions in Trino, e.g., in the 'trino main' module under 'io.trino.sql.functions.string'. Implement a new function class following the pattern of 'UpperFunction' or 'LowerFunction'. Register the function in the appropriate function registry. Update documentation in the 'docs' folder. Ensure the function handles nulls and edge cases.