big-data

Is your feature request related to a problem? Please describe.
Many static type checkers have issues finding Cython's stubs.
Here is from running mypy on my current project:

error: Skipping analyzing "cython": found module but no type hints or library stubs

The same issue can be seen when using import Cython as cython:

error: Skipping analyzing "Cython": found module but 

Problem:

_catboost.pyx in _catboost._set_features_order_data_pd_data_frame()

_catboost.pyx in _catboost.get_cat_factor_bytes_representation()

CatBoostError: Invalid type for cat_feature[non-default value idx=1,feature_idx=336]=2.0 : cat_features must be integer or string, real number values and NaN values should be converted to string.

Could you also print a feature name, not o

Add checks, similar to in RenameMaterializedViewTask, that the target table or view or materialized view does not exist in the RenameTableTask and RenameViewTask

Add --add-exports jdk.management/com.ibm.lang.management.internal only when OpenJ9 detected.

Otherwise we got WARNING: package com.ibm.lang.management.internal not in jdk.management in logs

Feature request

Overview

Currently Delta Lake doesn't have a test coverage report. It would be great to integration with some test coverage SBT plugin so that we can see the test coverage report in every PR.

Motivation

A test coverage report would help us understand whether we have enough tests to cover changes in a PR.

... to make it easier to read Vespa documentation on an e-reader / offline

Vespa documentation is generated using Jekyll from .md and .html files, look into options for generating the artifact as part of site generation (there might be plugins we can use here)

Use case:

Get the total duration over many events. Something like select sum(age(ended, started)) from myevents or select sum(ended - started) from myevents - depending on crate/crate#12479

See https://github.com/crate/crate/blob/dc3ce297b1597d482949a2e57479890feb3adbf4/server/src/main/java/io/crate/execution/engine/aggregation/impl/SumAggregation.java#L67