From 0d9bf706052f366df629c588c8f037569d311b15 Mon Sep 17 00:00:00 2001
From: "ZizhuanLiu(X-MAN)" <44973863@qq.com>
Date: Sat, 13 Jun 2026 19:16:36 +0800
Subject: [PATCH v3] Keep the return value of XLogInsertRecord() for
 XLOG_SWITCH record consistent with other records patch v4

---
 src/backend/access/transam/xlog.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index d69d03b..cc79df2 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -1027,8 +1027,14 @@ XLogInsertRecord(XLogRecData *rdata,
 		 */
 		if (inserted)
 		{
-			EndPos = StartPos + SizeOfXLogRecord;
-			if (StartPos / XLOG_BLCKSZ != EndPos / XLOG_BLCKSZ)
+			EndPos = StartPos + MAXALIGN(SizeOfXLogRecord);
+
+			/*
+			 * If the XLOG_SWITCH record crosses a page boundary and actually has
+			 * a part on the next page, we need to consider the page header. This
+			 * is consistent with XLogBytePosToEndRecPtr().
+			 */
+			if (StartPos / XLOG_BLCKSZ != (EndPos - 1) / XLOG_BLCKSZ)
 			{
 				uint64		offset = XLogSegmentOffset(EndPos, wal_segment_size);
 
-- 
2.43.0