Get meta information from the database with Eloquent

Solution:

I tried it with following code and it worked.

$primarykey = DB::select('SHOW KEYS FROM users WHERE Key_name = "PRIMARY"');

I had used select of DB without get method because it returns array like this

[
     {#3558
       +"Table": "users",
       +"Non_unique": 0,
       +"Key_name": "PRIMARY",
       +"Seq_in_index": 1,
       +"Column_name": "id",
       +"Collation": "A",
       +"Cardinality": 1,
       +"Sub_part": null,
       +"Packed": null,
       +"Null": "",
       +"Index_type": "BTREE",
       +"Comment": "",
       +"Index_comment": "",
     },
   ]

So please try and let me know if you find any issue in it. Thanks