Temporary build fix with PG17 development branch

Because the current smgr patchset is based on the PG17 branch, smgr
development needs to be based on that. But our current copied PG16
code doesn't compile with PG17.

This commit doesn't try to make the pg_tde AM work with PG17, only
"comments out" with conditional commands parts that do not compile.

PG16 builds work as before, without any changes.

PG17 at least compiles with missing code, probably doesn't really work.

src/access/pg_tde_prune.c

@@ -127,6 +127,7 @@ pg_tde_page_prune_opt(Relation relation, Buffer buffer)
 	if (RecoveryInProgress())
 		return;
 
+#if PG_VERSION_NUM < 170000
 	/*
 	 * XXX: Magic to keep old_snapshot_threshold tests appear "working". They
 	 * currently are broken, and discussion of what to do about them is
@@ -135,7 +136,7 @@ pg_tde_page_prune_opt(Relation relation, Buffer buffer)
 	 */
 	if (old_snapshot_threshold == 0)
 		SnapshotTooOldMagicForTest();
-
+#endif
 	/*
 	 * First check whether there's any chance there's something to prune,
 	 * determining the appropriate horizon is a waste if there's no prune_xid
@@ -166,14 +167,14 @@ pg_tde_page_prune_opt(Relation relation, Buffer buffer)
 
 	if (!GlobalVisTestIsRemovableXid(vistest, prune_xid))
 	{
+#if PG_VERSION_NUM < 170000
 		if ( !OldSnapshotThresholdActive())
 			return;
-
 		if (!TransactionIdLimitedForOldSnapshots(GlobalVisTestNonRemovableHorizon(vistest),
 												 relation,
 												 &limited_xmin, &limited_ts))
 			return;
-
+#endif
 		if (!TransactionIdPrecedes(prune_xid, limited_xmin))
 			return;
 	}
@@ -539,6 +540,7 @@ heap_prune_satisfies_vacuum(PruneState *prstate, HeapTuple tup, Buffer buffer)
 	 */
 	if (GlobalVisTestIsRemovableXid(prstate->vistest, dead_after))
 		res = HEAPTUPLE_DEAD;
+#if PG_VERSION_NUM < 170000
 	else if (OldSnapshotThresholdActive())
 	{
 		/* haven't determined limited horizon yet, requests */
@@ -566,7 +568,7 @@ heap_prune_satisfies_vacuum(PruneState *prstate, HeapTuple tup, Buffer buffer)
 			res = HEAPTUPLE_DEAD;
 		}
 	}
-
+#endif
 	return res;
 }
 

src/access/pg_tde_vacuumlazy.c

@@ -2828,8 +2828,11 @@ should_attempt_truncation(LVRelState *vacrel)
 {
 	BlockNumber possibly_freeable;
 
-	if (!vacrel->do_rel_truncate || VacuumFailsafeActive ||
-		old_snapshot_threshold >= 0)
+	if (!vacrel->do_rel_truncate || VacuumFailsafeActive
+#if PG_VERSION_NUM < 170000
+	 || old_snapshot_threshold >= 0
+#endif
+		)
 		return false;
 
 	possibly_freeable = vacrel->rel_pages - vacrel->nonempty_pages;

src/access/pg_tdeam.c

@@ -430,7 +430,9 @@ pg_tde_getpage(TableScanDesc sscan, BlockNumber block)
 	LockBuffer(buffer, BUFFER_LOCK_SHARE);
 
 	page = BufferGetPage(buffer);
+#if PG_VERSION_NUM < 170000
 	TestForOldSnapshot(snapshot, scan->rs_base.rs_rd, page);
+#endif
 	lines = PageGetMaxOffsetNumber(page);
 	ntup = 0;
 
@@ -569,9 +571,9 @@ pg_tde_gettup_start_page(HeapScanDesc scan, ScanDirection dir, int *linesleft,
 
 	/* Caller is responsible for ensuring buffer is locked if needed */
 	page = BufferGetPage(scan->rs_cbuf);
-
+#if PG_VERSION_NUM < 170000
 	TestForOldSnapshot(scan->rs_base.rs_snapshot, scan->rs_base.rs_rd, page);
-
+#endif
 	*linesleft = PageGetMaxOffsetNumber(page) - FirstOffsetNumber + 1;
 
 	if (ScanDirectionIsForward(dir))
@@ -602,9 +604,9 @@ pg_tde_gettup_continue_page(HeapScanDesc scan, ScanDirection dir, int *linesleft
 
 	/* Caller is responsible for ensuring buffer is locked if needed */
 	page = BufferGetPage(scan->rs_cbuf);
-
+#if PG_VERSION_NUM < 170000
 	TestForOldSnapshot(scan->rs_base.rs_snapshot, scan->rs_base.rs_rd, page);
-
+#endif
 	if (ScanDirectionIsForward(dir))
 	{
 		*lineoff = OffsetNumberNext(scan->rs_coffset);
@@ -869,8 +871,9 @@ pg_tde_gettup_pagemode(HeapScanDesc scan,
 		/* continue from previously returned page/tuple */
 		block = scan->rs_cblock;	/* current page */
 		page = BufferGetPage(scan->rs_cbuf);
+#if PG_VERSION_NUM < 170000
 		TestForOldSnapshot(scan->rs_base.rs_snapshot, scan->rs_base.rs_rd, page);
-
+#endif
 		lineindex = scan->rs_cindex + dir;
 		if (ScanDirectionIsForward(dir))
 			linesleft = scan->rs_ntuples - lineindex;
@@ -889,7 +892,9 @@ pg_tde_gettup_pagemode(HeapScanDesc scan,
 	{
 		pg_tde_getpage((TableScanDesc) scan, block);
 		page = BufferGetPage(scan->rs_cbuf);
+#if PG_VERSION_NUM < 170000
 		TestForOldSnapshot(scan->rs_base.rs_snapshot, scan->rs_base.rs_rd, page);
+#endif
 		linesleft = scan->rs_ntuples;
 		lineindex = ScanDirectionIsForward(dir) ? 0 : linesleft - 1;
 
@@ -1377,8 +1382,9 @@ pg_tde_fetch(Relation relation,
 	 */
 	LockBuffer(buffer, BUFFER_LOCK_SHARE);
 	page = BufferGetPage(buffer);
+#if PG_VERSION_NUM < 170000
 	TestForOldSnapshot(snapshot, relation, page);
-
+#endif
 	/*
 	 * We'd better check for out-of-range offnum in case of VACUUM since the
 	 * TID was obtained.
@@ -1668,8 +1674,9 @@ pg_tde_get_latest_tid(TableScanDesc sscan,
 		buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(&ctid));
 		LockBuffer(buffer, BUFFER_LOCK_SHARE);
 		page = BufferGetPage(buffer);
+#if PG_VERSION_NUM < 170000
 		TestForOldSnapshot(snapshot, relation, page);
-
+#endif
 		/*
 		 * Check for bogus item number.  This is not treated as an error
 		 * condition because it can happen while following a t_ctid link. We