use test;drop function if exists a;drop function if exists x;drop function if exists y;create function a() returns intreturn 1;create function x() returns intreturn 2;Warnings:Note 1585 This function 'x' has the same name as a native functioncreate function y() returns intreturn 3;Warnings:Note 1585 This function 'y' has the same name as a native functionselect a();a()1select x();ERROR 42000: Incorrect parameter count in the call to native function 'x'select y();ERROR 42000: Incorrect parameter count in the call to native function 'y'select x(PointFromText("POINT(10 20)")), y(PointFromText("POINT(10 20)"));x(PointFromText("POINT(10 20)")) y(PointFromText("POINT(10 20)"))10 20select test.a(), test.x(), test.y();test.a() test.x() test.y()1 2 3drop function a;drop function x;drop function y;