Struct CoalesceFilter 

pub struct CoalesceFilter {
    pub columns: Vec<&'static str>,
    pub op: FilterOp,
    pub value: FilterValue,
}

COALESCE(col_a, col_b, ...) <op> <value> — left-hand expression is the first non-null among the listed columns; right-hand side is a bound value via the usual FilterValue envelope. Lets schemas express the “ranked-fallback compare” pattern that shows up in outbox / scheduler tables, where a single row carries several time columns and the dispatcher wants the earliest non-null one.

IsNull and IsNotNull are valid op choices too: a row where every coalesced column is null collapses to COALESCE(...) IS NULL, which the engine can index-elide when at least one of the inputs has a NOT NULL constraint.

Fields

columns: Vec<&'static str>

op: FilterOp

value: FilterValue

Trait Implementations

impl Clone for CoalesceFilter

fn clone(&self) -> CoalesceFilter

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CoalesceFilter

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq for CoalesceFilter

fn eq(&self, other: &CoalesceFilter) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CoalesceFilter