delta-io/delta

[Feature Request] Add collectStats option to DeltaTable.convertToDelta method

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#1,385 opened on Sep 20, 2022

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 (6 comments) (0 reactions) (1 assignee)Scala (2,100 forks)batch import
enhancementgood first issue

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Description

Feature request

Here's the current method signature for DeltaTable.convertToDelta:

DeltaTable.convertToDelta(spark, identifier, partitionSchema)

It'd be nice if there was a collectStats option that'd let users skip statistics collection if that's a bottleneck when they're trying to convert a Parquet lake to a Delta Lake.

Further details

Looks like collectStats is set to false in this file. Perhaps it'll be relatively straightforward to expose this option via the different language APIs.

Willingness to contribute

The Delta Lake Community encourages new feature contributions. Would you or another member of your organization be willing to contribute an implementation of this feature?

  • Yes. I can contribute this feature independently.
  • Yes. I would be willing to contribute this feature with guidance from the Delta Lake community.
  • No. I cannot contribute this feature at this time.

Contributor guide

Research direction
Investigate how the collectStats parameter is handled in the ConvertToDeltaCommand and expose it through the Python and Scala public APIs.
Tech stack
scalapythonspark
Domain
backenddatadatabase
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
PythonSparkDelta Lake
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60