Dropping dependent tables

Hi,
I would like to write a SQL statement to drop all the tables owned by me
but a problem I’m struggling with is with referential integrity. The
statement I have now to generate the drop statements is

select 'drop table '||tablename||' cascade;' from pg_tables where
tableowner='<myuseraccount>';

The generated SQLs above might attempt to drop the parent tables first
before the child and to be able to drop all the tables, I had to run the
SQL script in multiple iterations. Not very clean.

Can someone advise how I could formulate the SQL to check for table
dependencies to generate a SQL script that drops the child tables first
before the parent? Or are there any better alternatives?

Thank you.

Tiff

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