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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
Download patch file Download diff file Expand all files Collapse all files

36
innobase/btr/btr0cur.c
View file

@ -1642,7 +1642,7 @@ btr_cur_optimistic_update(
btr_search_update_hash_on_delete(cursor);
page_cur_delete_rec(page_cursor, index, mtr);
page_cur_delete_rec(page_cursor, index, offsets, mtr);
page_cur_move_to_prev(page_cursor);
@ -1885,7 +1885,7 @@ btr_cur_pessimistic_update(
btr_search_update_hash_on_delete(cursor);
page_cur_delete_rec(page_cursor, index, mtr);
page_cur_delete_rec(page_cursor, index, offsets, mtr);
page_cur_move_to_prev(page_cursor);
@ -2401,6 +2401,7 @@ btr_cur_optimistic_delete(
mem_heap_t* heap = NULL;
ulint offsets_[100] = { 100, };
ulint* offsets = offsets_;
ibool no_compress_needed;
ut_ad(mtr_memo_contains(mtr, buf_block_align(btr_cur_get_page(cursor)),
MTR_MEMO_PAGE_X_FIX));
@ -2414,9 +2415,11 @@ btr_cur_optimistic_delete(
offsets = rec_get_offsets(rec, cursor->index, offsets,
ULINT_UNDEFINED, &heap);
if (!rec_offs_any_extern(offsets)
no_compress_needed = !rec_offs_any_extern(offsets)
&& btr_cur_can_delete_without_compress(
cursor, rec_offs_size(offsets), mtr)) {
cursor, rec_offs_size(offsets), mtr);
if (no_compress_needed) {
lock_update_delete(rec);
@ -2425,20 +2428,17 @@ btr_cur_optimistic_delete(
max_ins_size = page_get_max_insert_size_after_reorganize(page,
1);
page_cur_delete_rec(btr_cur_get_page_cur(cursor),
cursor->index, mtr);
cursor->index, offsets, mtr);
ibuf_update_free_bits_low(cursor->index, page, max_ins_size,
mtr);
if (heap) {
mem_heap_free(heap);
}
return(TRUE);
}
if (heap) {
mem_heap_free(heap);
}
return(FALSE);
return(no_compress_needed);
}
/*****************************************************************
@ -2478,6 +2478,7 @@ btr_cur_pessimistic_delete(
ibool success;
ibool ret = FALSE;
mem_heap_t* heap;
ulint* offsets;
page = btr_cur_get_page(cursor);
tree = btr_cur_get_tree(cursor);
@ -2503,20 +2504,20 @@ btr_cur_pessimistic_delete(
}
}
heap = mem_heap_create(256);
heap = mem_heap_create(1024);
rec = btr_cur_get_rec(cursor);
offsets = rec_get_offsets(rec, cursor->index,
NULL, ULINT_UNDEFINED, &heap);
/* Free externally stored fields if the record is neither
a node pointer nor in two-byte format.
This avoids unnecessary calls to rec_get_offsets(). */
This avoids an unnecessary loop. */
if (cursor->index->table->comp
? !rec_get_node_ptr_flag(rec)
: !rec_get_1byte_offs_flag(rec)) {
btr_rec_free_externally_stored_fields(cursor->index,
rec, rec_get_offsets(rec, cursor->index,
NULL, ULINT_UNDEFINED, &heap),
in_rollback, mtr);
mem_heap_empty(heap);
rec, offsets, in_rollback, mtr);
}
if ((page_get_n_recs(page) < 2)
@ -2568,7 +2569,8 @@ btr_cur_pessimistic_delete(
btr_search_update_hash_on_delete(cursor);
page_cur_delete_rec(btr_cur_get_page_cur(cursor), cursor->index, mtr);
page_cur_delete_rec(btr_cur_get_page_cur(cursor), cursor->index,
offsets, mtr);
ut_ad(btr_check_node_ptr(tree, page, mtr));