InvalidChunkRangeException about bqfetch HOT 2 CLOSED

Hi Veniamin,

Thanks for using bqfetch!
This error means that the column you chose for indexing: "datetime_tzutc", is not a good index column, namely there are chances that if you request 2GB of data during one fetch, you could end up with a fetch of 5GB resulting in memory overflow. I give some good examples of index column in the README.

However, in the latest version of bqfetch that I just released, this exception is transformed in a warning message, so it could work, but keep in mind that the partitioning of your tables will not be good using this column!

To install latest version, please run pip install --upgrade bqfetch.

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Thank you, Tristan, for a quick response!
I will upgrade the library and check README file once again.

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