Struct ProjectionFlags 

pub struct ProjectionFlags {
    pub include_cell_metadata: bool,
}

Projection-level flags that control opt-in metadata collection.

Created during query planning and threaded to the scan/build path. When all flags are false (the default), the hot path allocates nothing extra — QueryRow::cell_metadata stays None.

Fields

include_cell_metadata: bool

Set when the SELECT list contains at least one WRITETIME(col) or TTL(col) expression. Causes per-cell metadata to be attached to each QueryRow produced by the scan.

Wired by: issue #692 (executor evaluation). Until then, callers can set this flag manually in tests or driver code.

Trait Implementations

impl Clone for ProjectionFlags

fn clone(&self) -> ProjectionFlags

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectionFlags

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

Formats the value using the given formatter.

impl Default for ProjectionFlags

fn default() -> ProjectionFlags

Returns the “default value” for a type.