"DB2 中有什么方法可以从会话中找到临时表吗？"

Question

Is there any way in DB2 to find temp table from the session ?

I have created a temp table pertaining to session

DECLARE GLOBAL TEMPORARY TABLE SESSION.TEMP_TABLE_NAME
(   
        COL_1 VARCHAR(11) NOT NULL,
        COL_2 VARCHAR(10)
) ON COMMIT PRESERVE ROWS;

When I am trying to create query

select * from sysibm.systables where owner='SESSION' and name='TEMP_TABLE_NAME'

yields 0 rows.

Am I looking at the incorrect table to find temp tables ?

Thanks !

Answer 1

A declared global temporary table ( DGTT) will not appear in the catalog, this is the design - so you will not find a DGTT in sysibm.systables. A DGTT cannot be used by any other program except the one that declares it - it is specific to that session, hence there's no value to having it in the catalogue.

If you are using Db2 for z/OS (v10 or higher), or Db2-LUW, you may need instead, a "CREATED global temporary table" (CGTT) which uses a different syntax create global temporary table ... These are catalogued, but you need relevant permissions to create them.

See the Db2-LUW documentation . or for Db2 for z/OS here .

Answer 2

Look at the SYSIBMADM.ADMINTEMPTABLES administrative view.
If you want to see all the DGTTs created in your session, then:

SELECT TABNAME
FROM SYSIBMADM.ADMINTEMPTABLES
WHERE TEMPTABTYPE='D'
AND APPLICATION_HANDLE=mon_get_application_handle();

Answer 3

如何检查会话中是否存在声明临时表，因为使用选择查询如果它不存在会抛出异常。有没有办法检查没有异常？

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