Features: Support needed

[ion-elgreco]

Projects seeking contributors

There are some useful features that need support to be implemented:

Delta features:

• Identity Columns
• Column Mapping
  • Column alterations
• Deletion Vectors
• Shallow clone
  • Read absolute paths
• v2 Checkpoints
• inCommitTimestamps
• Type widening
• Liquid clustering
• Variant Data Type
• Default Columns
• Domain Metadata
• VACUUM Protocol Check
• Row Tracking

Client features:

• Progress API
• ConfigKey Python
• Object Store caching layer
• Make z-order run on prefixed strings Make work Z-order is on strings with identical prefix of length >= 14 #2844

See the sub-issue for each topic.

[hntd187]

By type expansion you mean type widening? It might help to wait on that one until it's out of preview in the spec, it might change.

[ion-elgreco]

@hntd187 yes that's what I meant, ah I thought it was already GA. I'll update the description

[scovich]

ah I thought it was already GA

I believe type widening is GA in Databricks for some time now, but the actual Delta spec is not finalized yet.

It might help to wait on [type widening] until it's out of preview in the spec, it might change.

There is a PR delta-io/delta#4094 open to finalize the Delta spec for the table feature, which will probably merge soon.