From e83aa9f92fdd88c2912cc43a61fd9f59f4c8f4d3 Mon Sep 17 00:00:00 2001
From: Michael Paquier <michael@paquier.xyz>
Date: Tue, 21 Nov 2023 13:55:01 +0900
Subject: [PATCH] Simplify some logic in CreateReplicationSlot()

This refactoring reduces the code in charge of creating replication
slots from two "if" block to a single one, making it slightly cleaner.

This change is possible since 1d04a59be31b, that has removed the
intermediate code that existed between the two "if" blocks in charge of
initializing the output message buffer.

Author: Peter Smith
Discussion: https://postgr.es/m/CAHut+PtnJzqKT41Zt8pChRzba=QgCqjtfYvcf84NMj3VFJoKfw@mail.gmail.com
---
 src/backend/replication/walsender.c | 32 ++++++++++++++---------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c
index e250b0567ebbc..3bc9c823895e1 100644
--- a/src/backend/replication/walsender.c
+++ b/src/backend/replication/walsender.c
@@ -1061,9 +1061,25 @@ CreateReplicationSlot(CreateReplicationSlotCmd *cmd)
 		ReplicationSlotCreate(cmd->slotname, false,
 							  cmd->temporary ? RS_TEMPORARY : RS_PERSISTENT,
 							  false);
+
+		if (reserve_wal)
+		{
+			ReplicationSlotReserveWal();
+
+			ReplicationSlotMarkDirty();
+
+			/* Write this slot to disk if it's a permanent one. */
+			if (!cmd->temporary)
+				ReplicationSlotSave();
+		}
 	}
 	else
 	{
+		LogicalDecodingContext *ctx;
+		bool		need_full_snapshot = false;
+
+		Assert(cmd->kind == REPLICATION_KIND_LOGICAL);
+
 		CheckLogicalDecodingRequirements();
 
 		/*
@@ -1076,12 +1092,6 @@ CreateReplicationSlot(CreateReplicationSlotCmd *cmd)
 		ReplicationSlotCreate(cmd->slotname, true,
 							  cmd->temporary ? RS_TEMPORARY : RS_EPHEMERAL,
 							  two_phase);
-	}
-
-	if (cmd->kind == REPLICATION_KIND_LOGICAL)
-	{
-		LogicalDecodingContext *ctx;
-		bool		need_full_snapshot = false;
 
 		/*
 		 * Do options check early so that we can bail before calling the
@@ -1175,16 +1185,6 @@ CreateReplicationSlot(CreateReplicationSlotCmd *cmd)
 		if (!cmd->temporary)
 			ReplicationSlotPersist();
 	}
-	else if (cmd->kind == REPLICATION_KIND_PHYSICAL && reserve_wal)
-	{
-		ReplicationSlotReserveWal();
-
-		ReplicationSlotMarkDirty();
-
-		/* Write this slot to disk if it's a permanent one. */
-		if (!cmd->temporary)
-			ReplicationSlotSave();
-	}
 
 	snprintf(xloc, sizeof(xloc), "%X/%X",
 			 LSN_FORMAT_ARGS(MyReplicationSlot->data.confirmed_flush));