如何使用OpenERP在Postgresql中获取最后一个插入的id

我有一个插入查询,我想在OpenERP中获取最后一个插入的id.这是代码：

query = "INSERT INTO foo SELECT * FROM bar"
cr.execute(query) # cr => cursor

如何获取最后插入的ID？插入是空的时候发生了什么？

解决方法:

看看RETURNING clause.

INSERT INTO table [ ( column [, ...] ) ]
    { DEFAULT VALUES | VALUES ( { expression | DEFAULT } [, ...] ) [, ...] | query }
    [ RETURNING * | output_expression [ AS output_name ] [, ...] ]

Insert a single row into table distributors, returning the sequence number generated by the DEFAULT clause:

INSERT INTO distributors (did, dname) VALUES (DEFAULT, 'XYZ Widgets')
   RETURNING did;