Trait FieldScheduler 

pub trait FieldScheduler:
    Send
    + Sync
    + Debug {
    // Required methods
    fn initialize<'a>(
        &'a self,
        filter: &'a FilterExpression,
        context: &'a SchedulerContext,
    ) -> BoxFuture<'a, Result<()>>;
    fn schedule_ranges<'a>(
        &'a self,
        ranges: &[Range<u64>],
        filter: &FilterExpression,
    ) -> Result<Box<dyn SchedulingJob + 'a>>;
    fn num_rows(&self) -> u64;
}

Schedules the I/O needed to decode one field.

Required Methods

fn initialize<'a>( &'a self, filter: &'a FilterExpression, context: &'a SchedulerContext, ) -> BoxFuture<'a, Result<()>>

fn schedule_ranges<'a>( &'a self, ranges: &[Range<u64>], filter: &FilterExpression, ) -> Result<Box<dyn SchedulingJob + 'a>>

fn num_rows(&self) -> u64

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors