definition without any <literal>GENERATED</literal> clause

in <command>CREATE TABLE ... PARTITION OF</command>, then

its <literal>GENERATED</literal> clause will automatically be copied

from the parent. <command>ALTER TABLE ...ADD PARTITION</command>

from the parent. <command>ALTER TABLE ...ATTACH PARTITION</command>

will insist that parent and child columns already match as to

generation status, but it will not require their generation

expressions to match.