Trait QueryNode 

pub trait QueryNode: Send + Sync {
    // Required methods
    fn initialize<'a>(
        &mut self,
        rx: &mut Transaction<'a>,
        ctx: &QueryContext,
    ) -> Result<()>;
    fn next<'a>(
        &mut self,
        rx: &mut Transaction<'a>,
        ctx: &mut QueryContext,
    ) -> Result<Option<Columns>>;
    fn headers(&self) -> Option<ColumnHeaders>;
}

Required Methods

fn initialize<'a>( &mut self, rx: &mut Transaction<'a>, ctx: &QueryContext, ) -> Result<()>

fn next<'a>( &mut self, rx: &mut Transaction<'a>, ctx: &mut QueryContext, ) -> Result<Option<Columns>>

fn headers(&self) -> Option<ColumnHeaders>

Trait Implementations

impl QueryNode for Box<dyn QueryNode>

fn initialize<'a>( &mut self, rx: &mut Transaction<'a>, ctx: &QueryContext, ) -> Result<()>

fn next<'a>( &mut self, rx: &mut Transaction<'a>, ctx: &mut QueryContext, ) -> Result<Option<Columns>>

fn headers(&self) -> Option<ColumnHeaders>

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl QueryNode for Box<dyn QueryNode>

fn initialize<'a>( &mut self, rx: &mut Transaction<'a>, ctx: &QueryContext, ) -> Result<()>

fn next<'a>( &mut self, rx: &mut Transaction<'a>, ctx: &mut QueryContext, ) -> Result<Option<Columns>>

fn headers(&self) -> Option<ColumnHeaders>

Implementors

impl QueryNode for NaturalJoinNode

impl QueryNode for NestedLoopJoinNode

impl QueryNode for DictionaryScanNode

impl QueryNode for RingBufferScan

impl QueryNode for SeriesScanNode

impl QueryNode for TableScanNode