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| author | Marko Mäkelä <marko.makela@mariadb.com> | 2019-11-08 11:04:26 +0200 |
|---|---|---|
| committer | Marko Mäkelä <marko.makela@mariadb.com> | 2019-11-08 11:04:26 +0200 |
| commit | a6d614fb4ad8df0daa402690b7a0a547a727a04b (patch) | |
| tree | 7f225e5180cad61fdfcec4966310495a7388460a /storage/innobase/btr | |
| parent | 5b72e8136fd439b9d297bdf50d5d5d2e8a119665 (diff) | |
| download | mariadb-git-a6d614fb4ad8df0daa402690b7a0a547a727a04b.tar.gz | |
MDEV-12353 preparation: Remove redundant writes
fsp_alloc_seg_inode_page(): Ever since
commit 3926673ce7149aa223103126b6aeac819b10fab5
all newly allocated pages are zero-initialized.
Assert that this is the case for the FSEG_ID fields.
(Side note: before that fix, other parts of the pages
could contain nonzero garbage.)
btr_store_big_rec_extern_fields(): Remove the redundant initialization
of the most significant 32 bits of BTR_EXTERN_LEN. InnoDB never supported
BLOBs that are longer than 4GiB. In fact, dtuple_convert_big_rec()
would write emit an error message if a clustered index record tuple would
exceed 1,000,000,000 bytes in length.
Diffstat (limited to 'storage/innobase/btr')
| -rw-r--r-- | storage/innobase/btr/btr0cur.cc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/storage/innobase/btr/btr0cur.cc b/storage/innobase/btr/btr0cur.cc index 72232766e4d..a3fb214cd80 100644 --- a/storage/innobase/btr/btr0cur.cc +++ b/storage/innobase/btr/btr0cur.cc @@ -7870,8 +7870,8 @@ next_zip_page: extern_len -= store_len; - mlog_write_ulint(field_ref + BTR_EXTERN_LEN, 0, - MLOG_4BYTES, &mtr); + ut_ad(!mach_read_from_4(BTR_EXTERN_LEN + + field_ref)); mlog_write_ulint(field_ref + BTR_EXTERN_LEN + 4, big_rec_vec->fields[i].len |