'DB2 to Postgres Function

I need to change function of db2 to posgtgre

postgresql db2

Solution 1:^[1]

You don't need a FROM clause in Postgres to begin with.

The function seems to return the number of days since 0001-01-01 which can be express in Postgres as:

select current_date - date '0001-01-01';

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Solution	Source
Solution 1	a_horse_with_no_name