Expose Table Aliases to Sub Queries in Where Clauses #459
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When there is a sub query in a where clause (either with an exists clause or a sub query to column condition) it is very common to reference columns in the "outer" query. With this change, if the outer table has an alias, then the alias will automatically be applied to columns in the sub query. This makes it possible to reference outer query columns without having to re specify and alias.
Resolves #437