@@ -2092,25 +2092,20 @@ btbuildphasename(int64 phasenum)
20922092 * Caller's insertion scankey is used to compare the tuples; the scankey's
20932093 * argument values are not considered here.
20942094 *
2095- * Sometimes this routine will return a new pivot tuple that takes up more
2096- * space than firstright, because a new heap TID attribute had to be added to
2097- * distinguish lastleft from firstright. This should only happen when the
2098- * caller is in the process of splitting a leaf page that has many logical
2099- * duplicates, where it's unavoidable.
2100- *
21012095 * Note that returned tuple's t_tid offset will hold the number of attributes
21022096 * present, so the original item pointer offset is not represented. Caller
21032097 * should only change truncated tuple's downlink. Note also that truncated
21042098 * key attributes are treated as containing "minus infinity" values by
21052099 * _bt_compare().
21062100 *
2107- * In the worst case (when a heap TID is appended) the size of the returned
2108- * tuple is the size of the first right tuple plus an additional MAXALIGN()'d
2109- * item pointer. This guarantee is important, since callers need to stay
2110- * under the 1/3 of a page restriction on tuple size. If this routine is ever
2111- * taught to truncate within an attribute/datum, it will need to avoid
2112- * returning an enlarged tuple to caller when truncation + TOAST compression
2113- * ends up enlarging the final datum.
2101+ * In the worst case (when a heap TID must be appended to distinguish lastleft
2102+ * from firstright), the size of the returned tuple is the size of firstright
2103+ * plus the size of an additional MAXALIGN()'d item pointer. This guarantee
2104+ * is important, since callers need to stay under the 1/3 of a page
2105+ * restriction on tuple size. If this routine is ever taught to truncate
2106+ * within an attribute/datum, it will need to avoid returning an enlarged
2107+ * tuple to caller when truncation + TOAST compression ends up enlarging the
2108+ * final datum.
21142109 */
21152110IndexTuple
21162111_bt_truncate (Relation rel ,IndexTuple lastleft ,IndexTuple firstright ,