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e1e8ca2788
Under the hood, the selectable::add_and_get_index() function deliberately filters out duplicate columns. This causes simple_selector::get_output_row() to return a row with all duplicate columns filtered out, which triggers and assertion because of row mismatch with metadata (which contains the duplicate columns). The fix is rather simple: just make selection::from_selectors() use selection_with_processing if the number of selectors and column definitions doesn't match -- like Apache Cassandra does. Fixes #1367 Message-Id: <1477989740-6485-1-git-send-email-penberg@scylladb.com>