# molt-fetch

> Claude/Codex skill by [@cockroachdb](https://omgskills.com/library/cockroachdb/index.md) · 4 stars · Updated 2026-10-09

Guide for using molt fetch to migrate data from PostgreSQL, MySQL, Oracle, or MSSQL to CockroachDB. Use when running molt fetch commands, configuring storage backends, handling fetch failures/resumption, or chaining fetch with verify.

Tags: claude, cockroach-cloud, cockroachdb, developer-tools

## Install

```sh
git clone https://github.com/cockroachdb/claude-plugin /tmp/claude-plugin && ln -s /tmp/claude-plugin/skills/cockroachdb-onboarding-and-migrations/molt-fetch ~/.claude/skills/molt-fetch
```

## From README

molt fetch Bulk data migration from source databases (PostgreSQL, MySQL, Oracle, MSSQL) to CockroachDB. Basic Structure Storage Backends (pick one) | Option | When to use | |--------|-------------| | --bucket-path "s3://..." | AWS S3 (also gs:// for GCS, azure:// for Azure) | | --direct-copy | No intermediate storage; fastest for accessible networks | | --local-path "/tmp/molt" + --local-path-listen-addr "0.0.0.0:9005" | CRDB must reach the listen addr | Cloud auth: pass --use-implicit-auth for IAM/ADC/managed identity, or set AWSACCESSKEYID/GOOGLEAPPLICATIONCREDENTIALS env vars. Table Handling (--table-handling) | Value | Behavior | |-------|----------| | none (default) | Append to existing tables | | drop-on-target-and-recreate | Drop + recreate from source schema; enables auto schema creation.

## Links

- HTML page: https://omgskills.com/library/cockroachdb/claude-plugin/skills/cockroachdb-onboarding-and-migrations/molt-fetch/
- GitHub: https://github.com/cockroachdb/claude-plugin
- Author: [@cockroachdb](https://omgskills.com/library/cockroachdb/index.md)

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