r-polars

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Why does query error takes so much time to appear on data from `scan_*`?

3

One advantage of `LazyFrame` is that the query should be checked before any computation. In the example below, I make a wrong operation by comparing a character column (`tailnum`) to...

etiennebacher

Add `as_polars_expr`

4

Related to #599, #570, #715 - The conversion to lit currently being processed on the Rust side is defined by a generic function in R. (c.f. https://github.com/pola-rs/polars/blob/740e740d9ce3678ea061d5cb4c2bc94892838383/py-polars/polars/functions/lit.py#L27-L148) - Allows the...

eitsupi

Copy the contents of `docs.R` to a vignette

1

I think this document should be a vignette. https://github.com/pola-rs/r-polars/blob/9a09cb48ef38efbfc05cf25ef371856f49d53d2b/R/docs.R

eitsupi

Mapping table of R types and Polars types

2

Like this: https://arrow.apache.org/docs/11.0/r/articles/data_types.html#list-of-default-translations

eitsupi

It's possible to read from pipe?

2

I want to read data from pipe is it possible.like this ```R readLines(pipe("echo a,b")) # for example pl$lazy_csv_reader(pipe("echo a,b")) ```

Liripo

Scan R data.frame

3

For now, in `as_polars_lf`, we convert data.frame to RPolarsDataFrame (high cost) and then scan that. Can we scan data.frame directly and do pushing down? I think duckdb does that.

eitsupi

the extendr lint and commented code

2

Could you advise if the extendr lint is from extendr and there is nothing we could do in this repo to suppress it? also is it ok to have commented...

ssh352

I definitely may be misunderstanding the code, but in Arrow you could theoretically have an int64 or uint64 index also (i.e., if you're headed from arrow -> Polars, you might...

eitsupi

Related to #497, #732 Currently, several public and private functions can exchange Arrow data, but they are not well documented.

eitsupi

Move develop_polars.R away from inst

1

sorhawell