# cast

Convert `fields` into some common types.  If a field doesn't exist in the event, it is ignored.  Null values are preserved as null.

## Config

**Required:**
- `fields`: Mapping of field names to target types

**Supported Types:**
- `int` - Converts to integer
- `float` - Converts to floating-point number
- `bool` - Converts to boolean
- `ts-sec` - Converts seconds-since-epoch to moment timestamp
- `ts-msec` - Converts milliseconds-since-epoch to moment timestamp  
- `ts-usec` - Converts microseconds-since-epoch to moment timestamp

## Example

```yaml
pipeline:
  cast:
    config:
      fields:
        response_time: float
        status_code: int
        success: bool
        created_at: ts-sec
```