Igor Babaev db0c340601 Fixed LP bug #793436. ...

When looking for the execution plan of a derived table to be materialized
JOIN::optimize finds  out that all joined tables of the derived table
contain not more than one row then the derived table should be maretialized
at the optimization stage.
Added a test case for the bug.
Adjusted results in other test cases.

2011-06-06 12:19:35 -07:00

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