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ENH: avoid I/O when columns don't need to be returned #153

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theroggy opened this issue Aug 20, 2022 · 1 comment · Fixed by #195

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theroggy commented Aug 20, 2022

I noticed in the code that all columns are always read by ogr, but that they are not copied in the result by pyogrio.

Using OGR_L_SetIgnoredFields could/should improve read spead because it enables GDAL to avoid reading the data.

jorisvandenbossche mentioned this issue

ENH: use new columnar GetArrowStream if GDAL>=3.6 and pyarrow available #155

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jorisvandenbossche commented Sep 21, 2022

For reference, I added this to #155 (eb5943d), which could be used as starting point for doing this for the normal readers as well

brendan-ward mentioned this issue

ENH: Ignore fields not in specified columns when reading features #195

Merged

jorisvandenbossche closed this as completed in #195

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