{
  "name": "to_datetime",
  "type": "function",
  "description": "Convert a string into a datetime object.",
  "arguments": [ {"arg":"string","description":"string representing a datetime value"}],
  "examples": [ { "expression":"to_datetime('2012-05-04 12:50:00')", "returns":"2012-05-04T12:50:00"}
  ]
}