From 42279b291a2de8e4bd5ecaf4f8214337e4b0c936 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Mon, 19 May 2014 13:21:59 +0300 Subject: [PATCH] Use 0-based numbering in comments about backup blocks. The macros and functions that work with backup blocks in the redo function use 0-based numbering, so let's use that consistently in the function that generates the records too. Makes it so much easier to compare the generation and replay functions. Backpatch to 9.0, where we switched from 1-based to 0-based numbering. --- src/backend/access/nbtree/nbtinsert.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c index b8d558c7a9c..1655494f59e 100644 --- a/src/backend/access/nbtree/nbtinsert.c +++ b/src/backend/access/nbtree/nbtinsert.c @@ -1210,7 +1210,7 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright, item = (IndexTuple) PageGetItem(origpage, itemid); lastrdata->data = (char *) item; lastrdata->len = MAXALIGN(IndexTupleSize(item)); - lastrdata->buffer = buf; /* backup block 1 */ + lastrdata->buffer = buf; /* backup block 0 */ lastrdata->buffer_std = true; } @@ -1237,7 +1237,7 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright, lastrdata->data = (char *) newitem; lastrdata->len = MAXALIGN(newitemsz); - lastrdata->buffer = buf; /* backup block 1 */ + lastrdata->buffer = buf; /* backup block 0 */ lastrdata->buffer_std = true; } else if (ropaque->btpo.level == 0) @@ -1246,14 +1246,14 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright, * Although we don't need to WAL-log the new item, we still need * XLogInsert to consider storing a full-page image of the left * page, so make an empty entry referencing that buffer. This also - * ensures that the left page is always backup block 1. + * ensures that the left page is always backup block 0. */ lastrdata->next = lastrdata + 1; lastrdata++; lastrdata->data = NULL; lastrdata->len = 0; - lastrdata->buffer = buf; /* backup block 1 */ + lastrdata->buffer = buf; /* backup block 0 */ lastrdata->buffer_std = true; } @@ -1286,7 +1286,7 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright, lastrdata->data = NULL; lastrdata->len = 0; - lastrdata->buffer = sbuf; /* backup block 2 */ + lastrdata->buffer = sbuf; /* backup block 1 */ lastrdata->buffer_std = true; }