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$sth->{NAME}

  DB<3> x $sth
0  DBI::st=HASH(0x402426c0)
     empty hash

  DB<4> x tied %$sth
0  DBI::st=HASH(0x400221f0)
...
      -> undef
   'Statement' => 'select * from my.foo_test'
  DB<5>