select * from identifies where id =  5000 ;
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Index Scan using identify_pkey on identifies  (cost= 0 . 00 .. 5 . 99  rows= 1  width= 83 )
  Index Cond: (id =  5000 )


select * from identifies where id in ( 5000 , 5001 );
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Bitmap Heap Scan on identifies  (cost= 4 . 01 .. 11 . 95  rows= 2  width= 83 )
  Recheck Cond: ((id =  5000 ) OR (id =  5001 ))
  ->  BitmapOr  (cost= 4 . 01 .. 4 . 01  rows= 2  width= 0 )
        ->  Bitmap Index Scan on identify_pkey  (cost= 0 . 00 .. 2 . 00  rows= 1  width= 0 )
              Index Cond: (id =  5000 )
        ->  Bitmap Index Scan on identify_pkey  (cost= 0 . 00 .. 2 . 00  rows= 1  width= 0 )
              Index Cond: (id =  5001 )

select * from identifies where id = any (ARRAY[ 5000 , 5001 ]);
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Seq Scan on identifies  (cost= 0 . 00 .. 427 . 36  rows= 4748  width= 83 )
  Filter: (id = ANY ('{5000,5001}'::integer[]))