Allow for selection of single properties of map key elements

Description

The JPA spec (section 4.8) allows to select specific properties of map key elements:

The parser complains about the extraneous input after the KEY function, though:

Environment

None

Status

Assignee

Steve Ebersole

Reporter

Gunnar Morling

Fix versions

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backPortable

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Suitable for new contributors

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Requires Release Note

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Pull Request

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backportDecision

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Components

Priority

Major
Configure