@@ -1294,8 +1294,10 @@ tuplesort_putindextuplevalues(Tuplesortstate *state, Relation rel,
12941294 *
12951295 * Alter datum1 representation in already-copied tuples, so as to
12961296 * ensure a consistent representation (current tuple was just
1297- * handled). Note that we rely on all tuples copied so far actually
1298- * being contained within memtuples array.
1297+ * handled). It does not matter if some dumped tuples are already
1298+ * sorted on tape, since serialized tuples lack abbreviated keys
1299+ * (TSS_BUILDRUNS state prevents control reaching here in any
1300+ * case).
12991301 */
13001302for (i = 0 ;i < state -> memtupcount ;i ++ )
13011303{
@@ -1373,8 +1375,10 @@ tuplesort_putdatum(Tuplesortstate *state, Datum val, bool isNull)
13731375 *
13741376 * Alter datum1 representation in already-copied tuples, so as to
13751377 * ensure a consistent representation (current tuple was just
1376- * handled). Note that we rely on all tuples copied so far
1377- * actually being contained within memtuples array.
1378+ * handled). It does not matter if some dumped tuples are
1379+ * already sorted on tape, since serialized tuples lack
1380+ * abbreviated keys (TSS_BUILDRUNS state prevents control
1381+ * reaching here in any case).
13781382 */
13791383for (i = 0 ;i < state -> memtupcount ;i ++ )
13801384{
@@ -3174,8 +3178,10 @@ copytup_heap(Tuplesortstate *state, SortTuple *stup, void *tup)
31743178 *
31753179 * Alter datum1 representation in already-copied tuples, so as to
31763180 * ensure a consistent representation (current tuple was just
3177- * handled). Note that we rely on all tuples copied so far actually
3178- * being contained within memtuples array.
3181+ * handled). It does not matter if some dumped tuples are already
3182+ * sorted on tape, since serialized tuples lack abbreviated keys
3183+ * (TSS_BUILDRUNS state prevents control reaching here in any
3184+ * case).
31793185 */
31803186for (i = 0 ;i < state -> memtupcount ;i ++ )
31813187{
@@ -3414,8 +3420,10 @@ copytup_cluster(Tuplesortstate *state, SortTuple *stup, void *tup)
34143420 *
34153421 * Alter datum1 representation in already-copied tuples, so as to
34163422 * ensure a consistent representation (current tuple was just
3417- * handled). Note that we rely on all tuples copied so far actually
3418- * being contained within memtuples array.
3423+ * handled). It does not matter if some dumped tuples are already
3424+ * sorted on tape, since serialized tuples lack abbreviated keys
3425+ * (TSS_BUILDRUNS state prevents control reaching here in any
3426+ * case).
34193427 */
34203428for (i = 0 ;i < state -> memtupcount ;i ++ )
34213429{
@@ -3716,8 +3724,10 @@ copytup_index(Tuplesortstate *state, SortTuple *stup, void *tup)
37163724 *
37173725 * Alter datum1 representation in already-copied tuples, so as to
37183726 * ensure a consistent representation (current tuple was just
3719- * handled). Note that we rely on all tuples copied so far actually
3720- * being contained within memtuples array.
3727+ * handled). It does not matter if some dumped tuples are already
3728+ * sorted on tape, since serialized tuples lack abbreviated keys
3729+ * (TSS_BUILDRUNS state prevents control reaching here in any
3730+ * case).
37213731 */
37223732for (i = 0 ;i < state -> memtupcount ;i ++ )
37233733{