Struct ConstraintUsage 

pub struct ConstraintUsage {
    pub argv_index: Option<u32>,
    pub omit: bool,
}

Returned from xBestIndex to describe how the virtual table can use the constraints in the WHERE clause of a query.

Fields

argv_index: Option<u32>

1 based index of the argument passed

omit: bool

If true, core can omit this constraint in the vdbe layer.

Trait Implementations

impl Clone for ConstraintUsage

fn clone(&self) -> ConstraintUsage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ConstraintUsage

impl Debug for ConstraintUsage

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

Formats the value using the given formatter.