Standardize LSN formatting by zero padding

This commit standardizes the output format for LSNs to ensure consistent
representation across various tools and messages.  Previously, LSNs were
inconsistently printed as `%X/%X` in some contexts, while others used
zero-padding.  This often led to confusion when comparing.

To address this, the LSN format is now uniformly set to `%X/%08X`,
ensuring the lower 32-bit part is always zero-padded to eight
hexadecimal digits.

Author: Japin Li <japinli@hotmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/ME0P300MB0445CA53CA0E4B8C1879AF84B641A@ME0P300MB0445.AUSP300.PROD.OUTLOOK.COM

1 files changed, 10 insertions, 10 deletions

diff --git a/src/backend/replication/logical/worker.c b/src/backend/replication/logical/worker.c
index fd11805a44c..c5fb627aa56 100644
--- a/src/backend/replication/logical/worker.c
+++ b/src/backend/replication/logical/worker.c
@@ -1016,7 +1016,7 @@ apply_handle_commit(StringInfo s)
 	if (commit_data.commit_lsn != remote_final_lsn)
 		ereport(ERROR,
 				(errcode(ERRCODE_PROTOCOL_VIOLATION),
-				 errmsg_internal("incorrect commit LSN %X/%X in commit message (expected %X/%X)",
+				 errmsg_internal("incorrect commit LSN %X/%08X in commit message (expected %X/%08X)",
 								 LSN_FORMAT_ARGS(commit_data.commit_lsn),
 								 LSN_FORMAT_ARGS(remote_final_lsn))));
 
@@ -1108,7 +1108,7 @@ apply_handle_prepare(StringInfo s)
 	if (prepare_data.prepare_lsn != remote_final_lsn)
 		ereport(ERROR,
 				(errcode(ERRCODE_PROTOCOL_VIOLATION),
-				 errmsg_internal("incorrect prepare LSN %X/%X in prepare message (expected %X/%X)",
+				 errmsg_internal("incorrect prepare LSN %X/%08X in prepare message (expected %X/%08X)",
 								 LSN_FORMAT_ARGS(prepare_data.prepare_lsn),
 								 LSN_FORMAT_ARGS(remote_final_lsn))));
 
@@ -3903,7 +3903,7 @@ send_feedback(XLogRecPtr recvpos, bool force, bool requestReply)
 	pq_sendint64(reply_message, now);	/* sendTime */
 	pq_sendbyte(reply_message, requestReply);	/* replyRequested */
 
-	elog(DEBUG2, "sending feedback (force %d) to recv %X/%X, write %X/%X, flush %X/%X",
+	elog(DEBUG2, "sending feedback (force %d) to recv %X/%08X, write %X/%08X, flush %X/%08X",
 		 force,
 		 LSN_FORMAT_ARGS(recvpos),
 		 LSN_FORMAT_ARGS(writepos),
@@ -4909,7 +4909,7 @@ maybe_start_skipping_changes(XLogRecPtr finish_lsn)
 	skip_xact_finish_lsn = finish_lsn;
 
 	ereport(LOG,
-			errmsg("logical replication starts skipping transaction at LSN %X/%X",
+			errmsg("logical replication starts skipping transaction at LSN %X/%08X",
 				   LSN_FORMAT_ARGS(skip_xact_finish_lsn)));
 }
 
@@ -4923,8 +4923,8 @@ stop_skipping_changes(void)
 		return;
 
 	ereport(LOG,
-			(errmsg("logical replication completed skipping transaction at LSN %X/%X",
-					LSN_FORMAT_ARGS(skip_xact_finish_lsn))));
+			errmsg("logical replication completed skipping transaction at LSN %X/%08X",
+				   LSN_FORMAT_ARGS(skip_xact_finish_lsn)));
 
 	/* Stop skipping changes */
 	skip_xact_finish_lsn = InvalidXLogRecPtr;
@@ -5012,7 +5012,7 @@ clear_subscription_skip_lsn(XLogRecPtr finish_lsn)
 		if (myskiplsn != finish_lsn)
 			ereport(WARNING,
 					errmsg("skip-LSN of subscription \"%s\" cleared", MySubscription->name),
-					errdetail("Remote transaction's finish WAL location (LSN) %X/%X did not match skip-LSN %X/%X.",
+					errdetail("Remote transaction's finish WAL location (LSN) %X/%08X did not match skip-LSN %X/%08X.",
 							  LSN_FORMAT_ARGS(finish_lsn),
 							  LSN_FORMAT_ARGS(myskiplsn)));
 	}
@@ -5049,7 +5049,7 @@ apply_error_callback(void *arg)
 					   logicalrep_message_type(errarg->command),
 					   errarg->remote_xid);
 		else
-			errcontext("processing remote data for replication origin \"%s\" during message type \"%s\" in transaction %u, finished at %X/%X",
+			errcontext("processing remote data for replication origin \"%s\" during message type \"%s\" in transaction %u, finished at %X/%08X",
 					   errarg->origin_name,
 					   logicalrep_message_type(errarg->command),
 					   errarg->remote_xid,
@@ -5067,7 +5067,7 @@ apply_error_callback(void *arg)
 						   errarg->rel->remoterel.relname,
 						   errarg->remote_xid);
 			else
-				errcontext("processing remote data for replication origin \"%s\" during message type \"%s\" for replication target relation \"%s.%s\" in transaction %u, finished at %X/%X",
+				errcontext("processing remote data for replication origin \"%s\" during message type \"%s\" for replication target relation \"%s.%s\" in transaction %u, finished at %X/%08X",
 						   errarg->origin_name,
 						   logicalrep_message_type(errarg->command),
 						   errarg->rel->remoterel.nspname,
@@ -5086,7 +5086,7 @@ apply_error_callback(void *arg)
 						   errarg->rel->remoterel.attnames[errarg->remote_attnum],
 						   errarg->remote_xid);
 			else
-				errcontext("processing remote data for replication origin \"%s\" during message type \"%s\" for replication target relation \"%s.%s\" column \"%s\" in transaction %u, finished at %X/%X",
+				errcontext("processing remote data for replication origin \"%s\" during message type \"%s\" for replication target relation \"%s.%s\" column \"%s\" in transaction %u, finished at %X/%08X",
 						   errarg->origin_name,
 						   logicalrep_message_type(errarg->command),
 						   errarg->rel->remoterel.nspname,