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When doing ALTER TABLE, we forgot to point out that we actually have ROW_FORMAT information (from the original table), so we dropped to "sensible defaults". This affects both ALTER TABLE and OPTIMIZE TABLE which may fall back on ALTER TABLE for InnoDB. We now flag that we do indeed know the row-type, thereby preserving compression-type etc. No .test in 5.1 since we'd need a reasonable new plugin from InnoDB to show this properly; in higher versions, maria can demonstrate this.
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