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InnoDB: Zero fill newly created pages and deleted records to

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remove old junk and to improve compression ratio.
InnoDB: Make implicit type conversions explicit. (Bug #8826)


innobase/btr/btr0cur.c:
  Add "offsets" parameter to page_cur_delete_rec() calls
  btr_cur_optimistic_delete(): Simplify the logic with a flag variable
  btr_cur_pessimistic_delete(): Compute "offsets" earlier
innobase/include/page0cur.h:
  page_cur_delete_rec(): Add parameter "offsets"
innobase/include/page0page.h:
  page_mem_free(): Replace parameter "index" with "offsets"
innobase/include/page0page.ic:
  page_mem_free(): Replace parameter "index" with "offsets".
  Clear the data bytes of the freed record.
  (The "extra" bytes will be needed by free space management.)
innobase/include/rem0rec.h:
  Remove unnecessary function rec_get_size()
innobase/log/log0recv.c:
  Remove function rec_apply_log_recs_for_backup()
  unless #ifdef UNIV_HOTBACKUP.
innobase/page/page0cur.c:
  Add parameter "offsets" to page_cur_delete_rec().
innobase/page/page0page.c:
  page_create(): Zero fill the data area.
  page_delete_rec_list_start(): Add parameter "offsets"
  to page_cur_delete_rec().
innobase/rem/rem0rec.c:
  Remove unnecessary function rec_get_size().
  Fix compiler warnings about implicit type conversions.  (Bug #8826)
innobase/srv/srv0srv.c:
  Fix compiler warnings about implicit type conversions. (Bug #8826)
innobase/sync/sync0sync.c:
  Fix compiler warnings about implicit type conversions. (Bug #8826)
This commit is contained in:
unknown 2005-03-01 13:54:48 +02:00
commit b9b69440c1
11 changed files with 85 additions and 77 deletions
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7
innobase/include/page0cur.h
View file

@ -182,9 +182,10 @@ next record after the deleted one. */
void
page_cur_delete_rec(
/*================*/
page_cur_t* cursor, /* in: a page cursor */
dict_index_t* index, /* in: record descriptor */
mtr_t* mtr); /* in: mini-transaction handle */
page_cur_t* cursor, /* in: a page cursor */
dict_index_t* index, /* in: record descriptor */
const ulint* offsets,/* in: rec_get_offsets(cursor->rec, index) */
mtr_t* mtr); /* in: mini-transaction handle */
/********************************************************************
Searches the right position for a page cursor. */
UNIV_INLINE

2
innobase/include/page0page.h
View file

@ -528,7 +528,7 @@ page_mem_free(
/*==========*/
page_t* page, /* in: index page */
rec_t* rec, /* in: pointer to the (origin of) record */
dict_index_t* index); /* in: record descriptor */
const ulint* offsets);/* in: array returned by rec_get_offsets() */
/**************************************************************
The index page creation function. */

12
innobase/include/page0page.ic
View file

@ -777,20 +777,28 @@ page_mem_free(
/*==========*/
page_t* page, /* in: index page */
rec_t* rec, /* in: pointer to the (origin of) record */
dict_index_t* index) /* in: record descriptor */
const ulint* offsets)/* in: array returned by rec_get_offsets() */
{
rec_t* free;
ulint garbage;
ut_ad(rec_offs_validate(rec, NULL, offsets));
free = page_header_get_ptr(page, PAGE_FREE);
page_rec_set_next(rec, free);
page_header_set_ptr(page, PAGE_FREE, rec);
/* Clear the data bytes of the deleted record in order to improve
the compression ratio of the page and to make it easier to read
page dumps in corruption reports. The extra bytes of the record
cannot be cleared, because page_mem_alloc() needs them in order
to determine the size of the deleted record. */
memset(rec, 0, rec_offs_data_size(offsets));
garbage = page_header_get_field(page, PAGE_GARBAGE);
page_header_set_field(page, PAGE_GARBAGE,
garbage + rec_get_size(rec, index));
garbage + rec_offs_size(offsets));
}
#ifdef UNIV_MATERIALIZE

9
innobase/include/rem0rec.h
View file

@ -435,15 +435,6 @@ rec_offs_size(
/* out: size */
const ulint* offsets);/* in: array returned by rec_get_offsets() */
/**************************************************************
Returns the total size of a physical record. */
ulint
rec_get_size(
/*=========*/
/* out: size */
rec_t* rec, /* in: physical record */
dict_index_t* index); /* in: record descriptor */
/**************************************************************
Returns a pointer to the start of the record. */
UNIV_INLINE
byte*