paul-rogers commented on issue #1978: DRILL-7578: HDF5 Metadata Queries Fail with Large Files URL: https://github.com/apache/drill/pull/1978#issuecomment-585561327 As it turns out, you'll get the same error if you try to do a normal query on the data. So, we need a rule for what to do if a column is too large even at runtime. You can fail the query (as now), you can truncate the data, you can split the data into multiple rows. Here is where it would be super-helpful if Drill supported normal SQL warnings: then we could truncate the data when it is optional (as here), and issue a warning. Sigh. Working around a data size limitation is not a good use for a plugin config option. The user would need a different config for each file. Can you, instead, support some special column that is the preview? Don't include the preview column in SELECT *. (I think there is an EVF trick for that, I'll have to refresh my memory. I think I added it for one of your other plugins.) If the user wants the preview, they can ask `SELECT name, preview FROM ...`. Otherwise, the error is correct: the data is too large for a Drill column.
---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
