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  • Allow creation of virtual tables at startup · 2 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions issue performed_via_github_app
576759416 https://github.com/simonw/datasette/issues/657#issuecomment-576759416 https://api.github.com/repos/simonw/datasette/issues/657 MDEyOklzc3VlQ29tbWVudDU3Njc1OTQxNg== dazzag24 1055831 2020-01-21T16:20:19Z 2020-01-21T16:20:19Z NONE

Hi,

I've completed some changes to my fork of datasette that allows it to automatically create the parquet virtual table when you supply it with a filename that has the ".parquet" extension.

I had to figure out how to make the "CREATE VIRTUAL TABLE" statement only be applied to the fake in memory parquet database and not to any others that were also being loaded. Thus it supports mixed mode databases e.g

datasette my_test.parquet normal_sqlite_file.db --load-extension=libparquet.so --load-extensio n=mod_spatialite.so

Please see my changes here:
https://github.com/dazzag24/datasette/commit/8e18394353114f17291fd1857073b1e0485a1faf

Thanks

 
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 Allow creation of virtual tables at startup 548591089  
575321322 https://github.com/simonw/datasette/issues/657#issuecomment-575321322 https://api.github.com/repos/simonw/datasette/issues/657 MDEyOklzc3VlQ29tbWVudDU3NTMyMTMyMg== dazzag24 1055831 2020-01-16T20:01:43Z 2020-01-16T20:01:43Z NONE

I have successfully tested datasette using a parquet VIRTUAL TABLE. In the first terminal:

datasette airports.db --load-extension=libparquet

In another terminal I load the same sqlite db file using the sqlite3 cli client.

$ sqlite3 airports.db

and then load the parquet extension and create the virtual table.

sqlite> .load /home/darreng/metars/libparquet sqlite> CREATE VIRTUAL TABLE mytable USING parquet('/home/xx/data.parquet');

Now the parquet virtual table is usable by the datasette web UI.

Its not an ideal solution but is a proof that datasette works the parquet extension.

 
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 Allow creation of virtual tables at startup 548591089  

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