[HACKERS] custom function for converting human readable sizes to bytes

[Pavel Stehule]

Hi

I have to write some filters, and filtering by size is "unfriendly" due
calculation in bytes.

I propose inversion function to pg_size_pretty function - like
pg_human_size.

Usage:

SELECT * FROM pg_class
  WHERE pg_table_size(oid) > pg_human_size('2GB');


Ideas, comments?

Regards

Pavel