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Do not read aria bitmap page for internal temporary tables

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Instead create the bitmap page from scratch
This commit is contained in:
Monty 2024-11-19 21:41:06 +02:00
parent 93fb364cd9
commit 32962ea253
1 changed files with 22 additions and 11 deletions
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33
storage/maria/ma_bitmap.c
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@ -1068,19 +1068,30 @@ static my_bool _ma_read_bitmap_page(MARIA_HA *info,
adjust_total_size(info, page);
bitmap->full_head_size= bitmap->full_tail_size= 0;
DBUG_ASSERT(share->pagecache->block_size == bitmap->block_size);
res= pagecache_read(share->pagecache,
&bitmap->file, page, 0,
bitmap->map, PAGECACHE_PLAIN_PAGE,
PAGECACHE_LOCK_LEFT_UNLOCKED, 0) == NULL;
if (!res)
if (share->internal_table &&
page == 0 && share->state.state.data_file_length == bitmap->block_size)
{
/* Calculate used_size */
const uchar *data, *end= bitmap->map;
for (data= bitmap->map + bitmap->total_size; --data >= end && *data == 0; )
{}
bitmap->used_size= (uint) ((data + 1) - end);
DBUG_ASSERT(bitmap->used_size <= bitmap->total_size);
/* Avoid read of bitmap for internal temporary tables */
bzero(bitmap->map, bitmap->block_size);
bitmap->used_size= 0;
res= 0;
}
else
{
res= pagecache_read(share->pagecache,
&bitmap->file, page, 0,
bitmap->map, PAGECACHE_PLAIN_PAGE,
PAGECACHE_LOCK_LEFT_UNLOCKED, 0) == NULL;
if (!res)
{
/* Calculate used_size */
const uchar *data, *end= bitmap->map;
for (data= bitmap->map + bitmap->total_size; --data >= end && *data == 0; )
{}
bitmap->used_size= (uint) ((data + 1) - end);
DBUG_ASSERT(bitmap->used_size <= bitmap->total_size);
}
}
/*
We can't check maria_bitmap_marker here as if the bitmap page