[CALCITE-7677] CAST between ROW types fails at runtime - #5128
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Signed-off-by: Mihai Budiu <mbudiu@feldera.com>
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Jira Link
CALCITE-7677
Changes Proposed
This PR adjusts the Enumerable representation of ROW values to use Object[]. It also fixes the cast of ROW values to use a recursive implementation, which recursively converts each field. This handles correctly nested ROW types.