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Clickhouse Query Optimization

Checked
obsessiondb·vlatest·database

Helps with querying, optimization as part of working with databases and data persistence workflows.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add obsessiondb/clickhouse-skills --skill clickhouse-query-optimization -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

obsessiondb

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned obsessiondb/clickhouse-plugin at 1305d7ad25.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
1305d7ad25
Manifest
skills/clickhouse-query-optimization/SKILL.md
Scanned
1 file, 570 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill optimizes ClickHouse queries to improve performance and efficiency. It analyzes query plans, identifies bottlenecks like full table scans or inefficient joins, and suggests modifications such as adding indexes or rewriting the query logic. The goal is to reduce execution time and resource consumption for ClickHouse workloads.

When to use it

  • Slow Queries: When you have ClickHouse queries that are consistently taking a long time to execute.
  • Resource Contention: If your ClickHouse cluster is experiencing high CPU or memory usage due to inefficient queries.
  • Complex Joins: For queries involving multiple tables and complex join conditions, where optimization can significantly impact performance.
  • Large Datasets: When querying very large datasets in ClickHouse, query optimization becomes crucial for acceptable response times.

Key capabilities

  • Query plan analysis
  • Bottleneck identification (full table scans, inefficient joins)
  • Index suggestion
  • Query rewriting recommendations

Example prompts

  • "Optimize this ClickHouse query: SELECT ... FROM ... WHERE ..."
  • "Analyze the performance of this ClickHouse query and suggest improvements."
  • "I'm seeing slow execution times for queries joining tables X and Y. Can you help?"

Tips & gotchas

This skill requires access to the ClickHouse query being analyzed. Ensure the AI agent has appropriate permissions and context to effectively evaluate and recommend optimizations.