Administrator Guide : 3. Gateway Alias Configuration : Alias Parameters : How the Gateway Handles the iidbdb Alias
 
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How the Gateway Handles the iidbdb Alias
If the alias name is iidbdb, the gateway looks in the alias entries for an entry that corresponds to this alias. If a match is found, that entry is used. If no match is found, the first matching entry for the specified server class is retrieved. If the gateway is accessed using the iidbdb database name, the iidatabase catalog is built and populated with information from the alias entries for that server.
The following query may be entered when connecting to the iidbdb alias:
select name from iidatabase
Only queries against the gateway catalogs can be issued when the gateway is in the iidbdb mode. Queries against tables that do not begin with 'ii' are not allowed by the gateway. All UPDATE, INSERT, and DELETE functions are disabled as well.