[gdal-dev] Using VSIMEM properly

[nagyrobi_r at yahoo.com]

Thanks for the tips Laurențiu. 
O zi faină, Robert Nagy 

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  On Wed, Jan 17, 2024 at 3:34 PM, Laurențiu Nicola<lnicola at dend.ro> wrote:   
A pipe might prevent you from creating a spatial index, right?

I didn't test it, but another method would be to use a join (you can query multiple data sources in the same ogr2ogr invocation, https://gdal.org/user/ogr_sql_dialect.html#joins), but they are pretty limited and you might lose the spatial index.

If you just want to make it faster, https://gdal.org/drivers/vector/sqlite.html#target-drivers-vector-sqlite-performance-hints can also be pretty useful.

Laurentiu

On Wed, Jan 17, 2024, at 15:51, nagyrobi_r at yahoo.com wrote:

Technically in want to save time by not saving to disk. That is one of the main reasons that i want to save in memory. 
I tried chaning them using pipes but didnt work. 

Cu respect, 
Robert Nagy


  
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