Commit607f889

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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
`@@ -359,7 +359,7 @@`
`359`	`359`	`as <literal>FrozenXID</>. This XID does not follow the normal XID`
`360`	`360`	`comparison rules and is always considered older`
`361`	`361`	`than every normal XID. Normal XIDs are`
`362`		`- compared using modulo-2<superscript>31</> arithmetic. This means`
	`362`	`+ compared using modulo-2<superscript>32</> arithmetic. This means`
`363`	`363`	`that for every normal XID, there are two billion XIDs that are`
`364`	`364`	`<quote>older</> and two billion that are <quote>newer</>; another`
`365`	`365`	`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
`@@ -305,7 +305,7 @@ TransactionIdPrecedes(TransactionId id1, TransactionId id2)`
`305`	`305`	`{`
`306`	`306`	`/*`
`307`	`307`	`* If either ID is a permanent XID then we can just do unsigned`
`308`		`- * comparison.If both are normal, do a modulo-2^31 comparison.`
	`308`	`+ * comparison.If both are normal, do a modulo-2^32 comparison.`
`309`	`309`	`*/`
`310`	`310`	`int32diff;`
`311`	`311`

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