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A comment on Apache Arrow 3.0. Parent comment

Re:Apache Arrow 3.0 by wenc on Wednesday February 03, 2021 @08:01PM (#26021326)
The only database I know of that natively supports multidimensional arrays is SciDB (one of Stonebraker's products)

https://en.wikipedia.org/wiki/SciDB

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Re:Apache Arrow 3.0 by Shelnutt2 on Wednesday February 03, 2021 @10:13PM (#26022168)
TileDB[1] supports both sparse and dense multidimensional arrays. We support returning data in arrow arrays or an arrow table as one of many ways we interoperate with computational tools. You can also access the data directly via numpy array, pandas, R data.frames and a number of integrations with MariaDB, Presto, Spark, GDAL, PDAL and more.

Disclaimer: I am a member of the TileDB team.

[1] https://tiledb.com/

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Re:Apache Arrow 3.0 by zX41ZdbW on Thursday February 04, 2021 @04:57AM (#26024128)
ClickHouse has support for multidimensional arrays with arbitrary types and number of dimensions.

They are stored in tables in efficient column-oriented format.

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