amcheck: In verify_heapam, allows tuples with xmin 0.
Commit e88754a196
caused that case
to be reported as corruption, but Peter Geoghegan pointed out that
it can legitimately happen in the case of a speculative insertion
that aborts, so we'd better not flag it as corruption after all.
Back-patch to v14, like the commit that introduced the issue.
Discussion: http://postgr.es/m/CAH2-WzmEabzcPTxSY-NXKH6Qt3FkAPYHGQSe2PtvGgj17ZQkCw@mail.gmail.com
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parent
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@ -739,8 +739,7 @@ check_tuple_visibility(HeapCheckContext *ctx)
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switch (get_xid_status(xmin, ctx, &xmin_status))
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{
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case XID_INVALID:
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report_corruption(ctx,
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pstrdup("xmin is invalid"));
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/* Could be the result of a speculative insertion that aborted. */
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return false;
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case XID_BOUNDS_OK:
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break;
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