使用SQL获取DB2实例名称

Question

Is it possible to find the instance name of a DB2 database by querying the catalog metadata? For instance, we can find the columns of tables using SELECT tbname, column_name FROM SYSIBM.SYSCOLUMNS . Is there an analogous query that can get the instance name?

I need this because I am running a query to get the remaining free space in the DB, across several instances. I would prefer to have the query itself tell me the name of the instance.

Running DB2 10.5 on Linux.

Answer 1

For DB2 LUW you can use ENV_INST_INFO . The instance name is in the column INST_NAME :

SELECT INST_NAME FROM SYSIBMADM.ENV_INST_INFO

Answer 2

Depending on your DB2-server version and platform, you might use MON_GET_INSTANCE table function (see IBM DB2 knowledge center for details and example). For the instance name you can use PDLOGMSGS_LAST24HOURS