prestodb/presto

[native] Add support for row structs in VALUES clause

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#18,289 opened on Sep 6, 2022

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 (2 comments) (0 reactions) (1 assignee)Java (5,240 forks)batch import
good first issue

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Description

PR #18274 added support for maps and arrays in VALUES clause. This issue about adding support for structs.

select * from (values(1, row(1, 'test'))) as t(a, b);

Query 20220906_130852_01826_h2hkx failed: Error fetching http://[xxx]:7777/v1/task/async/20220906_130852_01826_h2hkx.0.0.0/results/0/0

CC: @majetideepak @aditi-pandit

Contributor guide

Research direction
Study the implementation in PR #18274 that added support for maps and arrays in VALUES clause. Identify the code paths for array and map handling, then generalize them to support row types. Focus on the parsing and type coercion logic in the VALUES clause.
Tech stack
java
Domain
backendapi
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaSQL
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60