Add Pipelines Show Command

[tanishgupta-db]

Changes

Adds databricks pipelines show <catalog.schema.table> command: shows a table's columns and sample data (or --output json). Runs SELECT * FROM <table> LIMIT n on a SQL warehouse. The warehouse is taken from --warehouse-id, DATABRICKS_WAREHOUSE_ID (env set), the workspace default, or picked.

Also adds tableprint lib for detecting terminal width and rendering a formatted table

Why

Users want a quick look at the data and schema of a dataset quickly without leaving the terminal. Mirrors the Catalog Explorer "Sample Data" experience for the CLI. Lives under the pipelines command group.

Tests

• Unit tests and Acceptance tests

E2E testing:

Screen.Recording.2026-07-23.at.11.05.36.PM.mov

[github-actions]

Approval status: pending

/acceptance/pipelines/ - needs approval

8 files changed
Suggested: @kanterov
Also eligible: @jefferycheng1, @lennartkats-db

/cmd/pipelines/ - needs approval

7 files changed
Suggested: @kanterov
Also eligible: @jefferycheng1, @lennartkats-db

General files (require maintainer)

4 files changed
Based on git history:

• @pietern -- recent work in cmd/pipelines/, ./

_{Any maintainer (@andrewnester, @anton-107, @denik, @pietern, @shreyas-goenka, @simonfaltum, @renaudhartert-db, @janniklasrose, @lennartkats-db) can approve all areas.
See OWNERS for ownership rules.}

[github-actions]

An authorized user can trigger integration tests manually by following the instructions below:

Trigger:
go/deco-tests-run/cli

Inputs:

• PR number: 6033
• Commit SHA: 58be02eef79eebb18864c18d2433fac2c20e5afc

Checks will be approved automatically on success.