ST_Distance()

Datum ST_Distance

(

PG_FUNCTION_ARGS

)

Definition at line 695 of file lwgeom_functions_basic.c.

{
        double mindist;
        GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
        GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
        LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
        LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
        gserialized_error_if_srid_mismatch(geom1, geom2, __func__);
 
        mindist = lwgeom_mindistance2d(lwgeom1, lwgeom2);
 
        lwgeom_free(lwgeom1);
        lwgeom_free(lwgeom2);
 
        PG_FREE_IF_COPY(geom1, 0);
        PG_FREE_IF_COPY(geom2, 1);
 
        /* if called with empty geometries the ingoing mindistance is untouched, and makes us return NULL*/
        if (mindist < FLT_MAX)
                PG_RETURN_FLOAT8(mindist);
 
        PG_RETURN_NULL();
}

References gserialized_error_if_srid_mismatch(), lwgeom_free(), lwgeom_from_gserialized(), and lwgeom_mindistance2d().

Referenced by optimistic_overlap().

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