issues: 548591089
This data as json
| id | node_id | number | title | user | state | locked | assignee | milestone | comments | created_at | updated_at | closed_at | author_association | pull_request | body | repo | type | active_lock_reason | performed_via_github_app | reactions | draft | state_reason |
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| 548591089 | MDU6SXNzdWU1NDg1OTEwODk= | 657 | Allow creation of virtual tables at startup | 1055831 | open | 0 | 4 | 2020-01-12T16:10:55Z | 2021-01-15T20:24:35Z | NONE | Hi, I've been experimenting with SQLite reading from huge datasets using this excellent Parquet extension from @cldellow. https://cldellow.com/2018/06/22/sqlite-parquet-vtable.html https://github.com/cldellow/sqlite-parquet-vtable This works really well, but I was keen to see if I could combine datasette with this. Having previously experimented with the spatialite extension I knew that datasette supports loading extensions in the underlying sqlite instance. However I hit a blocker as the current design only allows SELECT statements to be executed and so I am unable to execute the crucial CREATE VIRTUAL TABLE ......... command that is required to load the data from the parquet file into the table. It seems like this would be a simple-ish change, but I don't know enough about the architecture of datasette to start implementing this myself? Could this be done as a datasette plugin? or would this require more fundamental changes at initialisation time? My thoughts are that something at init time could detect that the user was loading a .parquet file and then switch to a mode were it loads that via the "CREATE VIRTUAL TABLE..." rather than loading the .db file in the default case?? I'm happy to contribute code and testing, I just need some pointers on the best approach. Thanks Darren |
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