optimizing-query-text SKILL.md skillA
optimizing-query-text from altimateai/data-engineering-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add altimateai/data-engineering-skills/optimizing-query-text@git:20260121.5b69ef4Pins git:20260121.5b69ef4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- altimateai/data-engineering-skills
- Path
skills/snowflake/optimizing-query-text/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260121.5b69ef4, committed Jan 21, 2026
- First version recorded
- Jan 21, 2026
- Size
- 6,713 bytes
- Repository stars
- 129
- License
- MIT
Optimizes Snowflake SQL query performance from provided query text. Use when optimizing Snowflake SQL for: (1) User provides or pastes a SQL query and asks to optimize, tune, or improve it (2) Task mentions "slow query", "make faster", "improve performance", "optimize SQL", or "query tuning" (3) Reviewing SQL for performance anti-patterns (function on filter column, implicit joins, etc.) (4) User asks why a query is slow or how to speed it up.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Optimize Query from SQL Text ## OUTPUT FORMAT Return ONLY the optimized SQL query. No markdown formatting, no explanations, no bullet points - just pure SQL that can be executed directly in Snowflake. ## CRITICAL: Semantic Preservation Rules **The optimized query MUST return IDENTICAL results to the original.** Before returning ANY optimization, verify: - **Same columns**: Exact same columns in exact same order with exact same aliases - **Same rows**: Filter conditions must be semantically equivalent - **Same ordering**: Preserve `ORDER BY` exactly as written - **Same limits**: If original has `LIMIT N`, keep `LIMIT N`. If no LIMIT, do NOT add one. **If you cannot guarantee identical results, return the original query unchanged.** --- ## Pattern 1: Function on Filter Column **Problem**: Functions on columns in WHERE clause prevent partition pruning and index usage. ### CAN Fix | Original | Optimized | Why Safe | |----------|-----------|----------| | `WHERE DATE(ts) = '2024-01-01'` | `WHERE ts >= '2024-01-01' AND ts < '2024-01-02'` | Equivalent range | | `WHERE YEAR(dt) = 2024` | `WHERE dt >= '2024-01-01' AND dt < '2025-01-01'` | Equivalent range | …
Read the whole file at its exact version.
How to install
mdr add altimateai/data-engineering-skills/optimizing-query-text@sha256:5007588fe49f7b5fThe line at the top of this page pins the label git:20260121.5b69ef4, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_mkcyensvz5zp2cri)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Jan 21, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260121.5b69ef4 latest | 2026-01-21 | 5b69ef4 | 6,713 B | A | view · diff |
| git:20260121.476f750 | 2026-01-21 | 476f750 | 3,113 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6713 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
altimateai/data-engineering-skills · 129 stars · license MIT · pushed 2026-10-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mkcyensvz5zp2cri GET https://markdownregistry.com/api/v1/resolve?ref=altimateai/data-engineering-skills/optimizing-query-text GET https://markdownregistry.com/api/v1/blob/5007588fe49f7b5ff1821e24b7a83ded3e49e626c7547b60f23c2525be57ff80
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.