Programmatically Retrieve files sizes

Hi there
Given a portal file item url (read in the apache logs), how can I retrive its size with SQL, in portal 9.0.2 ?
It appears in the "list" mode of pages, maybe there's a stored proc or table for this ?
Thank you
A.

Thanks for you reply.
wwdoc_document$ contains some fields :
- name (for instance 373306.JPG)
- filename (for instance "my_file.jpg")
- real_filename
The problem neither "filename" nore "real_filename" are unique, because when a user updates a file, they remain the same, and only "name" is changed (I guess it contains an internal and unique portal file name).
My problem is I can't retrieve the corresponding row in that table from an url. I need to know at least the "docid" from an url, or the (unique) "name" from an url, and I can't find the table(s) to get this.
Regards
A.

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Programmatically Retrieve files sizes

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