index access method operator classes. Each operator class defines
semantics for index columns of a particular data type and a particular
index access method. An operator class essentially specifies that a
particular operator family is applicable to a particular indexable column
data type. The set of operators from the family that are actually usable
with the indexed column are whichever ones accept the column's data type
as their left-hand input.
Operator classes are described at length in Section 37.16 .
Index access method operator class is for
Name of this operator class
Namespace of this operator class
Owner of the operator class
Operator family containing the operator class
Data type that the operator class indexes
True if this operator class is the default for
Type of data stored in index, or zero if same as
An operator class's
must match the
of its containing operator family.
Also, there must be no more than one
true for any given combination of