Glue table partition format question

Question

Hi,
We send our database old data into S3 in this format:

{table}/year/month/day/asset_id.parquet
so we have a lot of files like this:
table/2024/01/28/z.parquet
table/2024/01/28/y.parquet
table/2024/01/29/z.parquet
table/2024/01/29/y.parquet
etc...

When I edit my glue table and click on Partition it says :  "No available partitions."
Am I missing something?
Is it because we need to specify in the file name the actual meaning of the number like  here for example ?
{table}/year=2024/month=10/day=28/z.parquet
{table}/year=2024/month=10/day=28/y.parquet

Is Glue able to automatically partition with my file naming convention "accelerometer/2024/01/28" ?

What do you guys recommend doing for me ?
Thank you!

Gonzalo Herreros · Answer

The partitions have to be explicitly added to the catalog (expect from Athena projections), is not enough to have the data in the right path   
Because you are not following the naming convention, you cannot "repair" the table and the crawler cannot give it meaning partition names (will be named 0, 1, 2...) but you could rename the partition columns after the crawler has loaded them.

Glue table partition format question

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