parse_distance_predicate

sedona_expr::utils

Function parse_distance_predicate 

Source 
pub fn parse_distance_predicate(
    expr: &Arc<dyn PhysicalExpr>,
) -> Option<ParsedDistancePredicate>
Expand description

Parses a physical expression to extract distance predicate components.

This function recognizes and parses distance predicates in spatial queries. See ParsedDistancePredicate documentation for details on the supported distance predicate forms.

§Arguments

  • expr - A physical expression that potentially represents a distance predicate

§Returns

  • Some(ParsedDistancePredicate) - If the expression is a recognized distance predicate, returns the parsed components (two geometry arguments and the distance threshold)
  • None - If the expression is not a distance predicate or cannot be parsed

§Examples

The function can parse expressions like:

  • st_dwithin(geometry_column, POINT(0 0), 100.0)
  • st_distance(geom_a, geom_b) <= 50.0
  • 25.0 >= st_distance(geom_x, geom_y)