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[DataFusion] Add validation for unreferenced table in query #82

@alamb

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@alamb

Note: migrated from original JIRA: https://issues.apache.org/jira/browse/ARROW-8260

This is an edge case but the query "SELECT 1 FROM t" causes an error in the Parquet reader because we are not reading any columns. We should have the query planner recognize this and fail the query is invalid.

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