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HeapTupleHeaderAdjustCmax made the incorrect assumption that the raw

command id is the cmin, when it can in fact be a combo cid. That made rowsincorrectly invisible to a transaction where a tuple was deleted by multipleaborted subtransactions.Report and patch Karl Schnaitter. Back-patch to 8.3, where combo cids wasintroduced.

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src/backend/utils/time
- combocid.c

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`‎src/backend/utils/time/combocid.c‎`

Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -34,7 +34,7 @@`
`34`	`34`	`* Portions Copyright (c) 1994, Regents of the University of California`
`35`	`35`	`*`
`36`	`36`	`* IDENTIFICATION`
`37`		`- * $PostgreSQL: pgsql/src/backend/utils/time/combocid.c,v 1.4 2008/01/0119:45:55 momjian Exp $`
	`37`	`+ * $PostgreSQL: pgsql/src/backend/utils/time/combocid.c,v 1.5 2008/09/0118:52:45 heikki Exp $`
`38`	`38`	`*`
`39`	`39`	`*-------------------------------------------------------------------------`
`40`	`40`	`*/`
`@@ -155,7 +155,7 @@ HeapTupleHeaderAdjustCmax(HeapTupleHeader tup,`
`155`	`155`	`if (!(tup->t_infomask&HEAP_XMIN_COMMITTED)&&`
`156`	`156`	`TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetXmin(tup)))`
`157`	`157`	`{`
`158`		`-CommandIdcmin=HeapTupleHeaderGetRawCommandId(tup);`
	`158`	`+CommandIdcmin=HeapTupleHeaderGetCmin(tup);`
`159`	`159`
`160`	`160`	`cmax=GetComboCommandId(cmin,cmax);`
`161`	`161`	`*iscombo= true;`

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Commit9ac4299

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`‎src/backend/utils/time/combocid.c‎`

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