The sysopclasses system catalog table contains information about operator classes associated with secondary access methods. It contains one row for each operator class that has been defined in the database. The sysopclasses table has the following columns.
The opclassid value corresponds to the sysams.am_defopclass value that specifies the default operator class for the secondary access method that the amid column specifies.
The sysopclasses table has a composite index on the opclassname and owner columns and an index on opclassid column. Both indexes allow only unique values.
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