lance-format/lance

Support Arrow Tensor type

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#108 opened on Aug 15, 2022

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Description

edit: use arrow::extension::FixedShapeTensorType

https://arrow.apache.org/docs/dev/format/CanonicalExtensions.html#fixed-shape-tensor-extension

Problem

In arrow, Tensors do not have corresponding Array type, as it can not be used to store in a Table / Dataset / RecordBatch.

To support ML datasets, it is desirable to have tensors stored within the datasets.

Desired Behavior

To support parametrized Tensors in a Table / Datasets. A TensorArray and TensorType should allow parameters, i.e., shade, data type (i.e., bid_width) and etc.

class TensorType {
   TensorType(data_type, shade, ...)
}

Contributor guide

Research direction
Study the Arrow FixedShapeTensorType extension and implement a TensorArray in Rust following the pattern of other Arrow array types. Ensure it integrates with the Lance format for storage. Test with ML datasets.
Tech stack
rust
Domain
databackend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
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.
Clear
Prerequisites
RustGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65