1use test; 2drop function if exists a; 3drop function if exists x; 4drop function if exists y; 5create function a() returns int 6return 1; 7create function x() returns int 8return 2; 9Warnings: 10Note 1585 This function 'x' has the same name as a native function 11create function y() returns int 12return 3; 13Warnings: 14Note 1585 This function 'y' has the same name as a native function 15select a(); 16a() 171 18select x(); 19ERROR 42000: Incorrect parameter count in the call to native function 'x' 20select y(); 21ERROR 42000: Incorrect parameter count in the call to native function 'y' 22select ST_x(ST_PointFromText("POINT(10 20)")), ST_y(ST_PointFromText("POINT(10 20)")); 23ST_x(ST_PointFromText("POINT(10 20)")) ST_y(ST_PointFromText("POINT(10 20)")) 2410 20 25select test.a(), test.x(), test.y(); 26test.a() test.x() test.y() 271 2 3 28drop function a; 29drop function x; 30drop function y; 31