influxdata/telegraf

postgresql_extensible: query.tagvalue is strangely a CSV rather than a TOML array

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#13,730 opened on Aug 7, 2023

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feature requesthelp wantedsize/m

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Description

Use Case

When creating custom queries tagvalue is widely used to define result columns to be used as tag. Given that whole config file is a TOML syntax, use of CSV string format for tagvalue feels less natural than what TOML array would be.

Expected behavior

Supporting 2 types for the same config param can be messy, so I propose deprecate tagvalue and introduce tagvalues parameter with array type.

Actual behavior

tagvalue is a CSV string.

Additional info

No response

Contributor guide

Research direction
Add a new config parameter `tagvalues` as a TOML array in the postgresql extensible input plugin, deprecate `tagvalue` while maintaining backward compatibility, update documentation and tests.
Tech stack
go
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.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GoTOML
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65