Add Select() variant that exposes metadata

[GiedriusS]

For operator telemetry in https://github.com/thanos-community/promql-engine we would like to have metadata about the Select() function such as how much data and how fast it was retrieved from each StoreAPI. I suggest adding something like SelectWithMetadata() that returns extra information. This later could be used by promql-engine if query analysis is enabled.

[kanha-gupta]

Hey @GiedriusS I'll take this up for LFX :)
Any docs or past references to understand the implementation logic better ?

[kanha-gupta]

Hey @GiedriusS I have seen the past PRs of query observability and how the foundation is laid down for it .
Are there any issues to work on related to this for me to gain experience ? Thank you :)

[hirentimbadiya]

Greetings @GiedriusS , I'm eager to participate in the upcoming LFX mentorship for Fall 2023. As an open-source contributor and member at Layer5, I possess expertise in JavaScript, React.js, and Next.js. Additionally, I also know fundamentals of Golang and TypeScript, and I have familiarity with Docker and Kubernetes. Furthermore, I have a strong understanding of essential computer science topics such as object-oriented programming, data structures, and more. I look forward to contributing my skills and knowledge to this exciting project.

[PranitPatil03]

Hello @GiedriusS 👋

I'm Pranit Patil, a student pursuing a Bachelor's degree in Computer Science at Mumbai University. Recently, I completed my internship at hubx.ai, where I worked as a full-stack developer intern. Prior to that, I gained experience as a front-end developer intern at Tech Cryptors.

My skills include JavaScript, ReactJS, Node, Express, MongoDB, and CSS libraries, such as Bootstrap. Through various projects, including full-stack ones, I have honed my expertise in full-stack development

I'm keen on participating in the LFX mentorship program and becoming an active community member. I kindly request your assistance in guiding me through project discussions.

Thank you.

[GiedriusS]

Thanks for everyone's interest! I suggest first of all trying to compile and run Thanos & Prometheus locally. Then, you can try improving the documentation if you see any problems with it. You can also take a look at https://github.com/thanos-io/thanos/issues?page=1&q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22, maybe #4664 looks like a good candidate for starters. 😄

[ishashankmittal]

Hey! @GiedriusS , I am Shashank Mittal pursuing my undergrad at IIT BHU (Indian Institute of Technology (BHU) Varanasi). I am highly interested in Open Source and Software Development. I would love to contribute to Thanos and participate in this LFX Fall'23!