{
  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do not edit it. See ../README.md for how to regenerate it.",
  "type" : "scalar",
  "name" : "atan",
  "description" : "Returns the arctangent of the input\nnumeric expression as an angle, expressed in radians.",
  "signatures" : [
    {
      "params" : [
        {
          "name" : "number",
          "type" : "double",
          "optional" : false,
          "description" : "Numeric expression. If `null`, the function returns `null`."
        }
      ],
      "variadic" : false,
      "returnType" : "double"
    },
    {
      "params" : [
        {
          "name" : "number",
          "type" : "integer",
          "optional" : false,
          "description" : "Numeric expression. If `null`, the function returns `null`."
        }
      ],
      "variadic" : false,
      "returnType" : "double"
    },
    {
      "params" : [
        {
          "name" : "number",
          "type" : "long",
          "optional" : false,
          "description" : "Numeric expression. If `null`, the function returns `null`."
        }
      ],
      "variadic" : false,
      "returnType" : "double"
    },
    {
      "params" : [
        {
          "name" : "number",
          "type" : "unsigned_long",
          "optional" : false,
          "description" : "Numeric expression. If `null`, the function returns `null`."
        }
      ],
      "variadic" : false,
      "returnType" : "double"
    }
  ],
  "examples" : [
    "ROW a=12.9\n| EVAL atan=ATAN(a)"
  ],
  "preview" : false,
  "snapshot_only" : false
}