Shell执行DB2 SQL

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下面是DB2文档中找到的返回值的含义
The return code can be one of the following:
Code ?Description
0 ? ? DB2 command or SQL statement executed successfully
1 ? ? SELECT or FETCH statement returned no rows
2 ? ? DB2 command or SQL statement warning
4 ? ? DB2 command or SQL statement error
8 ? ? Command line processor system error