Derive Macro Record 

#[derive(Record)]
{
    // Attributes available to this derive:
    #[event_time]
    #[column]
    #[nullable]
}

Derive the Record trait for a struct.

Generates Record::schema(), Record::to_record_batch(), and Record::event_time() implementations automatically.

Supported Field Types

Rust Type	Arrow DataType
bool	Boolean
i8	Int8
i16	Int16
i32	Int32
i64	Int64
u8	UInt8
u16	UInt16
u32	UInt32
u64	UInt64
f32	Float32
f64	Float64
String	Utf8
Vec<u8>	Binary
Option<T>	nullable variant of T

Attributes

• #[event_time] — marks a field as the event time column
• #[column("name")] — overrides the Arrow column name
• #[nullable] — marks a non-Option field as nullable in the schema