为什么在执行以下查询时出现错误SQLCODE = -204，SQLSTATE = 42704，DRIVER = 4.18.60

Question

When I run:

select * from sys.server_role_members ;

got below error:

SQLCODE=-204, SQLSTATE=42704, DRIVER=4.18.60

Answer 1

As you seem to be a beginner, you need to know that when asking for help with Db2, it is important to always write your Db2-version and the Db2-server operating system (Z/OS, i-Series(formerly AS/400), or Linux/Unix/Windows ). That's because the three platforms have different capabilities and sometimes the SQL is different also, and the catalog is different.

You get that error because your query is meant for Microsoft SQL-Server databases only.

Your query cannot work on Db2 because Db2 does not allow user-created schema names to begin with SYS. Some IBM-created schema-names can start with SYS for example SYSIBM and SYSCAT but these are reserved for the catalog and they get created by Db2 during database creation.

Db2 has tables like SYSIBM.SYSROLEAUTH and SYSIBM.SYSROLES and (on Linux/Unix/Windows) a set of views on these in the SYSCAT schema.

For example, if your Db2-server runs on Linux/Unix/Windows, then these views exist SYSCAT.ROLES and SYSCAT.ROLEAUTH .

In addition, Db2 for Linux/Unix/Windows provides table function AUTH_LIST_AUTHORITIES_FOR_AUTHID which is quite useful.

If your Db2-server runs on i-Series, then different tables/views exist. That's the reason you need to know which platform of Db2 you are using, and write that in your questions.