Expressions Roadmap

[streamich]

This issue tracks all planned or possible work for Expressions service.

Tech debt

General

• Cleanup expression renderer handlers which are only used in Canvas
• Remove uiState from expressions plugin
• Add test coverage

Features

General

• Update forks/namespaces
• Expression inspector panel
• Background search service integration
• New saved object type
  • Convert canvas panel to embeddable
• Expression editor component

Functions

• Enforce serializable input/output on expression function definition
• Create "standard library" of data manipulation functions
• httpGet function to retrieve external datasets

Performance

• Expressions executor caching [WIP] Expressions caching #51160
• Code splitting

Integrations

Documentation

• Audit & update Jsdocs for all public contracts
• Audit & improve help text on any functions we own
• Create Expression explorer plugin
• Update README.md with more detail

Needs discussion

• Making expression interpreter & library of "standard functions" available outside Kibana
• API improvements

[elasticmachine]

Pinging @elastic/kibana-app-arch

[lukasolson]

We also need an issue for reporting progress information (e.g. # of functions executed vs. total), and maybe some mechanism for reporting progress of individual functions.