CREATE OPERATOR FAMILY

creates a new operator family. An operator family defines a collection of related operator classes, and perhaps some additional operators and support functions that are compatible with these operator classes but not essential for the functioning of any individual index. (Operators and functions that are essential to indexes should be grouped within the relevant operator class, rather than being “loose” in the operator family. Typically, single-data-type operators are bound to operator classes, while cross-data-type operators can be loose in an operator family containing operator classes for both data types.)

The new operator family is initially empty. It should be populated by issuing subsequent commands to add contained operator classes, and optionally commands to add “loose” operators and their corresponding support functions.

If a schema name is given then the operator family is created in the specified schema. Otherwise it is created in the current schema. Two operator families in the same schema can have the same name only if they are for different index methods.

name

The (optionally schema-qualified) name of the operator family to be defined. The name can be schema-qualified.

index_method

is a Greenplum Database extension. There is no statement in the SQL standard.

, DROP OPERATOR FAMILY, , ALTER OPERATOR CLASS, , DROP OPERATOR CLASS

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