Operation

The query format is similar to the where clause of an SQL query. The two main differences are that 5800 system queries do not contain embedded subqueries, and that the only “columns” that are available are the attributes defined in the 5800 system schema.

Many features of the underlying metadata database’s own query language can be used in queries. There is a recommended subset of queries, however, that is most likely to be portable from the 5800 system emulator to a live 5800 system cluster. That subset is described in the sections Supported Expression Types and Queries Not Supported in Version 1.1. These are the query expression types that should work identically on the 5800 system emulator and a live 5800 system cluster.