Enum AccessPathProbe 

pub enum AccessPathProbe {
    RowidEquality {
        target: Box<Expr>,
    },
    Equality {
        column: String,
        target: Box<Expr>,
    },
    Range {
        column: String,
        lower: Option<(Box<Expr>, bool)>,
        upper: Option<(Box<Expr>, bool)>,
    },
    InList {
        column: String,
        values: Vec<Box<Expr>>,
    },
}

Probe expressions extracted from the WHERE clause during access-path selection. Carried forward so downstream consumers (connection seam, VDBE codegen) do not re-extract from the AST.

Variants

RowidEquality

WHERE rowid = <target>

Fields

target: Box<Expr>

Equality

WHERE <column> = <target> backed by an index.

Fields

column: String

target: Box<Expr>

Range

WHERE <column> {>|>=} <lo> AND <column> {<|<=} <hi> backed by an index.

Fields

column: String

lower: Option<(Box<Expr>, bool)>

upper: Option<(Box<Expr>, bool)>

InList

WHERE <column> IN (<v1>, <v2>, ...) backed by an index — one seek per value.

Fields

column: String

values: Vec<Box<Expr>>

Trait Implementations

impl Clone for AccessPathProbe

fn clone(&self) -> AccessPathProbe

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AccessPathProbe

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

Formats the value using the given formatter.

impl PartialEq for AccessPathProbe

fn eq(&self, other: &AccessPathProbe) -> 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 AccessPathProbe