merging

drop table if exists t1;

CREATE FUNCTION metaphon RETURNS STRING SONAME "UDF_EXAMPLE_LIB";

Warnings:

Warning	1105	plugin_dir was not specified

CREATE FUNCTION myfunc_double RETURNS REAL SONAME "UDF_EXAMPLE_LIB";

CREATE FUNCTION myfunc_nonexist RETURNS INTEGER SONAME "UDF_EXAMPLE_LIB";

ERROR HY000: Can't find symbol 'myfunc_nonexist' in library

select * from mysql.func;

name	ret	dl	type

CREATE FUNCTION is_const RETURNS STRING SONAME "UDF_EXAMPLE_LIB";

Warnings:

Warning	1105	plugin_dir was not specified

select IS_const(3);

IS_const(3)

const

select is_const(3);

ERROR 42000: FUNCTION test.is_const does not exist

CREATE FUNCTION is_const RETURNS STRING SONAME "UDF_EXAMPLE_LIB";

Warnings:

Warning	1105	plugin_dir was not specified

select

is_const(3) as const,

is_const(3.14) as const,