 [
    {
      "name": "SCHEMA_NAME",
      "type": "varchar",
      "precision": 512,
      "scale": -2147483648,
      "primary": 0,
      "nullable": false
    },
    {
      "name": "TABLE_NAME",
      "type": "varchar",
      "precision": 64,
      "scale": -2147483648,
      "primary": 1,
      "nullable": false
    },
   {
     "name": "COLUMN_NAME",
     "type": "varchar",
     "precision": 64,
     "scale": -2147483648,
     "primary": 2,
     "nullable": false
   },
   {
     "name": "HISTOGRAM",
     "type": "varchar",
     "precision": 65536,
     "scale": -2147483648,
     "primary": -1,
     "nullable": false
   }
 ]
