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Agent skill

Database Hana

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Apply SAP HANA database standards for SQL parameterization, in-memory engine optimization, dynamic IN query chunking, column aliasing on joins, and datatype casting.

MITAuto-check passedDatabases

Install Database Hana

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill database-hana -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard database-hana --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/database/database-hana .claude/skills/database-hana && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
database-hana
GitHub stars
572
Token cost
~920 tokens
SKILL.md length
379 words
Files
4 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Apply SAP HANA database standards for SQL parameterization, in-memory engine optimization, dynamic IN query chunking, column aliasing on joins, and datatype casting.

  • Writing SQL for SAP HANA
  • SKILL.md covers Priority: P0 (CRITICAL), Rules, Verify and Anti-Patterns, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Optimizing HANA queries

What it does

Database Hana is an agent skill from HoangNguyen0403/agent-skills-standard. Apply SAP HANA database standards for SQL parameterization, in-memory engine optimization, dynamic IN query chunking, column aliasing on joins, and datatype casting. Use when writing SQL for SAP HANA, optimizing HANA queries, or diagnosing HANA driver errors.

Its SKILL.md is about 920 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `evals/evals.json`, `references/hana-patterns.md` and `references/sql-gotchas.md`).

It sits in Databases, covering SQL. It works with SAP and SQL. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Writing SQL for SAP HANA
  • Optimizing HANA queries
  • Diagnosing HANA driver errors

Example prompts

  • “/database-hana”

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Database Hana loads about 920 tokens when it runs, and up to ~2.1k if it reads all its reference files. Until then it costs about 68 tokens; SKILL.md has 379 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~68
When it runs · the whole SKILL.md, loaded when a task matches
~920
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 379 words, ~920 tokens.

Download SKILL.mdSave it as .claude/skills/database-hana/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
database-hana
description
Apply SAP HANA database standards for SQL parameterization, in-memory engine optimization, dynamic IN query chunking, column aliasing on joins, and datatype casting. Use when writing SQL for SAP HANA, optimizing HANA queries, or diagnosing HANA driver errors.

SAP HANA Database Standards

Priority: P0 (CRITICAL)

Rules

  • Strict Parameterization: Always use ? parameter placeholders for SAP HANA queries. Never use raw string concatenation, fmt.Sprintf, or untrusted interpolation for values.
  • Batching & Chunking Limits: Chunk large IN (...) parameter lists into batches of at most 1,000 items to avoid HANA driver and engine parameter limits.
  • Explicit Column Aliasing: Always explicitly alias columns in multi-table queries (e.g. m.code AS code, m.name AS name). SAP HANA and Go database drivers map scan columns by name; duplicate column names across joins silently collide or overwrite values. Never use SELECT *.
  • HANA Datatype Casting Gotchas: SAP HANA functions (such as COALESCE, SUBSTR, CONCAT) require strictly compatible parameter types. Explicitly cast values when comparing or falling back (e.g. COALESCE(col, 'default'), TO_VARCHAR(...), CAST(? AS NVARCHAR)).
  • Identifier Case-Sensitivity: Unquoted SQL identifiers in SAP HANA default to UPPERCASE. Quoted identifiers ("columnName") preserve case. Keep identifiers consistent with schema conventions.
  • Keyset & Streaming Pagination: Avoid deep LIMIT/OFFSET on large columnar tables. Prefer keyset/seek pagination (WHERE id > ? ORDER BY id ASC LIMIT ?) and stream large result sets using rows.Next() directly into models to prevent memory spikes.
  • Transaction Scope: Keep transactions short and focused on atomic write operations. Never perform slow external I/O or unbounded operations inside an open transaction. Always pair with defer tx.Rollback().
Show full SKILL.md (170 more words)Show less

Verify

  • Query uses ? placeholders for all user-supplied or dynamic values.
  • Large IN (...) queries chunk parameters into batches of ≤ 1,000 items.
  • All joined queries use explicit, distinct column aliases without SELECT *.
  • Built-in functions (COALESCE, SUBSTR) use matching datatypes or explicit CAST/TO_VARCHAR.
  • Pagination enforces strict LIMIT caps and stable ORDER BY.
  • Transactions are scoped to write paths with defer tx.Rollback().

Anti-Patterns

  • No SQL String Concatenation: Never build dynamic WHERE clauses by concatenating unescaped strings. Build parameterized placeholder slices.
  • No Unbounded IN Clauses: Passing thousands of IDs in a single IN (?, ?, ...) clause triggers HANA driver buffer overflow or query parsing degradation.
  • No SELECT * on Joins: Scanning duplicate column names across joined tables leads to silent bugs where one table's ID overwrites another.
  • No Incompatible COALESCE Arguments: Providing mismatched types (e.g. integer column with string fallback) causes runtime HANA inconsistent datatype errors.
  • No Heavy Reads Inside Transactions: Do not perform long calculation view aggregations or external network calls while holding an open transaction lock.

References

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in skills/database/database-hana of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/hana-patterns.md
  • references/sql-gotchas.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Database Hana next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Database Hana compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Database Hana this skillHoangNguyen0403/agent-skills-standard572—~920Automated safety check: PassMIT
Sap Abapsecondsky/sap-skills462—~3.9kAutomated safety check: PassGPL-3.0
Sap Hana CLIsecondsky/sap-skills462—~3.1kAutomated safety check: NotesGPL-3.0
Evolving The Data ModelTriliumNext/Trilium38k—~2.1kAutomated safety check: PassAGPL-3.0
Orchardcore Data MigrationOrchardCMS/OrchardCore8.2k—~1.7kAutomated safety check: PassBSD-3-Clause
SQL Optimization Patternsynulihao/AgentSkillOS61811 repos~3.3kAutomated safety check: PassNone

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Works with

Categories

Questions about Database Hana

What does Database Hana do?

Apply SAP HANA database standards for SQL parameterization, in-memory engine optimization, dynamic IN query chunking, column aliasing on joins, and datatype casting. Database Hana is an agent skill from HoangNguyen0403/agent-skills-standard. Apply SAP HANA database standards for SQL parameterization, in-memory engine optimization, dynamic IN query chunking, column aliasing on joins, and datatype casting.

When should I use Database Hana?

Database Hana fits situations like: writing SQL for SAP HANA; optimizing HANA queries; diagnosing HANA driver errors.

How do I install Database Hana in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill database-hana -a claude-code`. Or copy the skill folder (skills/database/database-hana in HoangNguyen0403/agent-skills-standard) into .claude/skills/database-hana in your project. Claude Code loads it when a task matches its description.

How do I install Database Hana in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill database-hana -a codex`. Or copy the skill folder (skills/database/database-hana in HoangNguyen0403/agent-skills-standard) into .agents/skills/database-hana in your project. Codex loads it when a task matches its description.

Can I use Database Hana in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill database-hana -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/database-hana, .gemini/skills/database-hana, .github/skills/database-hana and .opencode/skills/database-hana in your project.

What does Database Hana need to run?

SKILL.md names no scripts, command-line tools or credentials: Database Hana is instructions for the agent only.

Does Database Hana access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Database Hana safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Database Hana use?

Database Hana is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Database Hana use?

About 920 tokens (SKILL.md is roughly 3.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.2k tokens, read only when the agent opens those files.

What are the alternatives to Database Hana?

Skills that share tags, products or a category with Database Hana: Sap Abap (secondsky/sap-skills, 462 stars), Sap Hana CLI (secondsky/sap-skills, 462 stars), Evolving The Data Model (TriliumNext/Trilium, 38k stars) and Orchardcore Data Migration (OrchardCMS/OrchardCore, 8.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Database Hana?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.