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由 Tom Lane 提交于
mess up after an aborted VACUUM FULL, per today's pghackers discussion. Add a suitable HeapTupleSatisfiesToast routine. Remove useless special- case test in HeapTupleSatisfiesVisibility macro for xmax = BootstrapTransactionId; perhaps that was needed at one time, but it's a waste of cycles now, not to mention actively wrong for SnapshotAny. Along the way, add some much-needed comments to tqual.c, and simplify toast_fetch_datum, which no longer needs to assume it may see chunks out-of-order.
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