Operator Families

The operfamily module defines two classes: class OperatorFamily derived from DbSchemaObject and class OperatorFamilyDict derived from DbObjectDict.

Operator Family

OperatorFamily is derived from DbSchemaObject and represents a PostgreSQL operator family.

class pyrseas.dbobject.operfamily.OperatorFamily(**attrs)

An operator family

OperatorFamily.extern_key()

Return the key to be used in external maps for the operator family

Returns:string

OperatorFamily.identifier()

Return a full identifier for an operator family object

Returns:string

OperatorFamily.create(obj, *args, **kwargs)

Return SQL statements to CREATE the operator family

Returns:SQL statements

Operator Family Dictionary

OperatorFamilyDict is derived from DbObjectDict. It is a dictionary that represents the collection of operator families in a database.

class pyrseas.dbobject.operfamily.OperatorFamilyDict(dbconn=None)

The collection of operator families in a database

OperatorFamilyDict.from_map(schema, inopfams)

Initalize the dict of operator families by converting the input map

Parameters:

• schema – schema owning the operators
• inopfams – YAML map defining the operator families

OperatorFamilyDict.diff_map(inopfams)

Generate SQL to transform existing operator families

Parameters:inopfams – a YAML map defining the new operator families Returns:list of SQL statements

Compares the existing operator family definitions, as fetched from the catalogs, to the input map and generates SQL statements to transform the operator families accordingly.