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use test; drop function if exists a; drop function if exists x; drop function if exists y; create function a() returns int return 1; create function x() returns int return 2; Warnings: Note 1585 This function 'x' has the same name as a native function create function y() returns int return 3; Warnings: Note 1585 This function 'y' has the same name as a native function select a(); a() 1 select 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 20 select test.a(), test.x(), test.y(); test.a() test.x() test.y() 1 2 3 drop function a; drop function x; drop function y;