[eclipselink-dev] Git main push: Bug#376437 - batch fetching on aggregat

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[eclipselink-dev] Git main push: Bug#376437 - batch fetching on aggregates

From: James Sutherland <james.sutherland@xxxxxxxxxx>
Date: Mon, 15 Jul 2013 08:10:14 -0700 (PDT)
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Git main push: Bug#376437 - batch fetching on aggregates

Fix batch fetching to work with aggregates (embeddable).

Changes:

- JoinAttributeManage: moved getFirstNonAggregateExpressionAfterExpressionBuilder to ObjectExpression.

- AggregateObjectMapping: now prepare nested queries for aggregates that use (batch/join/partial/fetch), to avoid cloning per row.

- DatabaseMapping: split extractNestedExpressions into two methods, one used by batch and one by joining, as usage differs.

- ObjectLevelReadQuery: now prepare nested batch queries for inheritance.

- ObjectLevelReadQuery: now prepare nested batch queries off aggregates.

- ComplexAggregateTestSuite: added JPA tests for nested batch queries on aggregates.

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