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Fix description of WAL record blocks in hash_xlog.h

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hash_xlog.h included descriptions for the blocks used in WAL records
that were was not completely consistent with how the records are
generated, with one block missing for SQUEEZE_PAGE, and inconsistent
descriptions used for block 0 in VACUUM_ONE_PAGE and MOVE_PAGE_CONTENTS.

This information was incorrect since c11453ce0aea, cross-checking the
logic for the record generation.

Author: Kirill Reshke <reshkekirill@gmail.com>
Reviewed-by: Andrey Borodin <x4mmm@yandex-team.ru>
Discussion: https://postgr.es/m/CALdSSPj1j=a1d1hVA3oabRFz0hSU3KKrYtZPijw4UPUM7LY9zw@mail.gmail.com
Backpatch-through: 13
This commit is contained in:
Michael Paquier 2025-09-11 17:17:04 +09:00
parent c88ce73eda
commit 26eadf4d2b
1 changed files with 9 additions and 8 deletions
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17
src/include/access/hash_xlog.h
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@ -129,7 +129,7 @@ typedef struct xl_hash_split_complete
*
* This data record is used for XLOG_HASH_MOVE_PAGE_CONTENTS
*
* Backup Blk 0: bucket page
* Backup Blk 0: primary bucket page
* Backup Blk 1: page containing moved tuples
* Backup Blk 2: page from which tuples will be removed
*/
@ -149,12 +149,13 @@ typedef struct xl_hash_move_page_contents
*
* This data record is used for XLOG_HASH_SQUEEZE_PAGE
*
* Backup Blk 0: page containing tuples moved from freed overflow page
* Backup Blk 1: freed overflow page
* Backup Blk 2: page previous to the freed overflow page
* Backup Blk 3: page next to the freed overflow page
* Backup Blk 4: bitmap page containing info of freed overflow page
* Backup Blk 5: meta page
* Backup Blk 0: primary bucket page
* Backup Blk 1: page containing tuples moved from freed overflow page
* Backup Blk 2: freed overflow page
* Backup Blk 3: page previous to the freed overflow page
* Backup Blk 4: page next to the freed overflow page
* Backup Blk 5: bitmap page containing info of freed overflow page
* Backup Blk 6: meta page
*/
typedef struct xl_hash_squeeze_page
{
@ -245,7 +246,7 @@ typedef struct xl_hash_init_bitmap_page
*
* This data record is used for XLOG_HASH_VACUUM_ONE_PAGE
*
* Backup Blk 0: bucket page
* Backup Blk 0: primary bucket page
* Backup Blk 1: meta page
*/
typedef struct xl_hash_vacuum_one_page