DB<91> use Data::Dump qw/pp/ 

  DB<92> ; {local @hash{qw/log schema/};say pp \%hash}; say pp \%hash
{ a => 1, b => 2, c => 3, log => undef, schema => undef }
{ a => 1, b => 2, c => 3, log => "l", schema => "s" }