ST_RemoveRepeatedPoints()

Datum ST_RemoveRepeatedPoints

(

PG_FUNCTION_ARGS

)

Definition at line 2987 of file lwgeom_functions_basic.c.

{
        GSERIALIZED *g_in = PG_GETARG_GSERIALIZED_P_COPY(0);
        uint32_t type = gserialized_get_type(g_in);
        GSERIALIZED *g_out;
        LWGEOM *lwgeom_in = NULL;
        double tolerance = 0.0;
        int modified = LW_FALSE;
 
        /* Don't even start to think about points */
        if (type == POINTTYPE)
                PG_RETURN_POINTER(g_in);
 
        if (PG_NARGS() > 1 && !PG_ARGISNULL(1))
                tolerance = PG_GETARG_FLOAT8(1);
 
        lwgeom_in = lwgeom_from_gserialized(g_in);
        modified = lwgeom_remove_repeated_points_in_place(lwgeom_in, tolerance);
        if (!modified)
        {
                /* Since there were no changes, we can return the input to avoid the serialization */
                PG_RETURN_POINTER(g_in);
        }
 
        g_out = geometry_serialize(lwgeom_in);
 
        pfree(g_in);
        PG_RETURN_POINTER(g_out);
}

References gserialized_get_type(), LW_FALSE, lwgeom_from_gserialized(), lwgeom_remove_repeated_points_in_place(), and POINTTYPE.

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