Commitb57947a

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Fix ancient docs/comments thinko: XID comparison is mod 2^32, not 2^31.

Pointed out by Gianni Ciolli.

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Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -401,7 +401,7 @@`
`401`	`401`	`as <literal>FrozenXID</>. This XID does not follow the normal XID`
`402`	`402`	`comparison rules and is always considered older`
`403`	`403`	`than every normal XID. Normal XIDs are`
`404`		`- compared using modulo-2<superscript>31</> arithmetic. This means`
	`404`	`+ compared using modulo-2<superscript>32</> arithmetic. This means`
`405`	`405`	`that for every normal XID, there are two billion XIDs that are`
`406`	`406`	`<quote>older</> and two billion that are <quote>newer</>; another`
`407`	`407`	`way to say it is that the normal XID space is circular with no`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -301,7 +301,7 @@ TransactionIdPrecedes(TransactionId id1, TransactionId id2)`
`301`	`301`	`{`
`302`	`302`	`/*`
`303`	`303`	`* If either ID is a permanent XID then we can just do unsigned`
`304`		`- * comparison.If both are normal, do a modulo-2^31 comparison.`
	`304`	`+ * comparison.If both are normal, do a modulo-2^32 comparison.`
`305`	`305`	`*/`
`306`	`306`	`int32diff;`
`307`	`307`

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