Module datastructures

Useful auxiliary data structures for query construction. Not useful outside the SQL domain.

Classes

class BaseTable
The BaseTable class is used for base table references in FROM clause. For
class Empty
class Join
Used by sql.Query and sql.SQLCompiler to generate JOIN clauses into the FROM entry. For example, the SQL generated could be LEFT OUTER JOIN "sometable" T1 ON ("othertable"."sometable_id" = "sometable"."id")
class MultiJoin
Used by join construction code to indicate the point at which a multi-valued join was attempted (if the caller wants to treat that exceptionally).