关于 DB2 函数 声明 基础问题
SET SCHEMA DB2INST1;

SET CURRENT PATH = "SYSIBM","SYSFUN","SYSPROC","SYSIBMADM","DB2INST1";

CREATE FUNCTION DB2INST1.VARCHAR(CFLOAT DOUBLE)
RETURNS CHARACTER(30)
SPECIFIC DB2INST1.SQL091023140234200
LANGUAGE SQL
NOT DETERMINISTIC
READS SQL DATA
STATIC DISPATCH
CALLED ON NULL INPUT
EXTERNAL ACTION
INHERIT SPECIAL REGISTERS
BEGIN ATOMIC -- 声明
end ; --结束

那以上那些 每行都什么意思啊 求高人点播 下

[解决办法]

SQL code

   CREATE FUNCTION TAN (X DOUBLE)     RETURNS DOUBLE     LANGUAGE SQL     CONTAINS SQL     NO EXTERNAL ACTION     DETERMINISTIC     RETURN SIN(X)/COS(X);