lemon.external.gadfly.semantics.Selector

Package lemon :: Package external :: Package gadfly :: Module semantics :: Class Selector

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Class Selector

For implementing, eg the SQL SELECT statement.

Method Summary
	`__init__(self, alldistinct, select_list, table_reference_list, where_pred, group_list, having_cond, union_select, order_by_spec, ndynamic)`
	`__repr__(self)`
	`attributes(self)`
	`check_domains(self)` determine set of unbound names in self.
	`demarshal(self, data)`
	`eval(self, dynamic, outerboundtuple)` leaves a lot to be desired.
	`initargs(self)`
	`marshaldata(self)`
	`plan_query(self)` generate a query plan (sequence of join operators).
	`relbind(self, db, outerbindings)`
	`unbound(self)`
	`uncache(self)`

Method Details

check_domains(self)

determine set of unbound names in self.

eval(self, dynamic=None, outerboundtuple=None)

leaves a lot to be desired.
dynamic and outerboundtuple are mutually
exclusive.  dynamic is only pertinent to
top levels, outerboundtuple to subqueries

plan_query(self)

generate a query plan (sequence of join operators).

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