ArcticDB

ArcticDB copied to clipboard

### Describe the bug The test_hypothesis_mean_agg occasionally fails on the conda mac build as seen [here](https://github.com/man-group/ArcticDB/actions/runs/7639977500/job/20814128990?pr=1265). ``` FAILED tests/unit/arcticdb/version_store/test_aggregation.py::test_hypothesis_mean_agg[EncodingVersion.V2] - AssertionError: DataFrame.iloc[:, 0] (column name="a") are different DataFrame.iloc[:, 0] (column...

IvoDD

Known locations: - [x] `copy_frame_data_to_buffer` - [ ] `LocalVersionedEngine::get_descriptor` x2 - [ ] `read_frame.cpp` multiple locations - [ ] `aggregator_set_data` - [x] `AggregationClause::process` x2 closed by #1450 - [x] `aggregation.cpp`...

alexowens90

Support for `first` and `last` aggregators - string columns

2

Fix #1105

Hind-M

#### Reference Issues/PRs #### What does this implement or fix? #### Any other comments? #### Checklist Checklist for code changes... - [ ] Have you updated the relevant docstrings, documentation...

phoebusm

In case there are no rows in the initial dataframe the index is set to be datetime index. There is no particular reasoning behind this choice. This makes it impossible...

vasil-pashov

V2 encoding does not hash descriptor

1

### Describe the bug When a dataframe has columns that contain the same data across a column slice, the hash of the columns data is identical. Normally the keys would...

willdealtry

alexowens90

Document that as_of interprets argument as UTC and document how point-in-time works

5

### Describe the bug Everywhere `as_of` can be used we should document what format of timestamp it supports and that it assumes it to be UTC (rather than the local...

jamesmunro

### Describe the bug ArcticDB crashes when trying to normalize timestamp with time zone when MsgPack is used as a normalizer. This problem occurs most often when trying to write...

G-D-Petrov

Poor performance when reading as_of a date with many early versions deleted

1

### Describe the bug There is a feature called _tombstone all_ that is supposed to prevent version search having to walk the entire historical version list when the early versions...

DrNickClarke