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Bug#14399148 INNODB TABLES UNDER LOAD PRODUCE DUPLICATE COPIES OF ROWS

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IN QUERIES

This bug was caused by an incorrect fix of
Bug#13807811 BTR_PCUR_RESTORE_POSITION() CAN SKIP A RECORD

There was nothing wrong with btr_pcur_restore_position(), but with the
use of it in the table scan during index creation.

rb:1206 approved by Jimmy Yang
This commit is contained in:
Marko Mäkelä 2012-08-09 09:55:29 +03:00
parent 941924e831
commit e0482cb0bc
4 changed files with 77 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
storage/innobase/btr/btr0pcur.c
View File

@ -312,45 +312,40 @@ btr_pcur_restore_position(
/* Restore the old search mode */
cursor->search_mode = old_mode;
if (btr_pcur_is_on_user_rec(cursor, mtr)) {
switch (cursor->rel_pos) {
case BTR_PCUR_ON:
if (!cmp_dtuple_rec(
tuple, btr_pcur_get_rec(cursor),
rec_get_offsets(btr_pcur_get_rec(cursor),
index, NULL,
ULINT_UNDEFINED, &heap))) {
switch (cursor->rel_pos) {
case BTR_PCUR_ON:
if (btr_pcur_is_on_user_rec(cursor, mtr)
&& !cmp_dtuple_rec(
tuple, btr_pcur_get_rec(cursor),
rec_get_offsets(btr_pcur_get_rec(cursor),
index, NULL,
ULINT_UNDEFINED, &heap))) {
/* We have to store the NEW value for
the modify clock, since the cursor can
now be on a different page! But we can
retain the value of old_rec */
/* We have to store the NEW value for
the modify clock, since the cursor can
now be on a different page! But we can
retain the value of old_rec */
cursor->block_when_stored =
buf_block_align(
btr_pcur_get_page(cursor));
cursor->modify_clock =
buf_block_get_modify_clock(
cursor->block_when_stored);
cursor->old_stored = BTR_PCUR_OLD_STORED;
cursor->block_when_stored =
buf_block_align(
btr_pcur_get_page(cursor));
cursor->modify_clock =
buf_block_get_modify_clock(
cursor->block_when_stored);
cursor->old_stored = BTR_PCUR_OLD_STORED;
mem_heap_free(heap);
mem_heap_free(heap);
return(TRUE);
}
break;
case BTR_PCUR_BEFORE:
page_cur_move_to_next(btr_pcur_get_page_cur(cursor));
break;
case BTR_PCUR_AFTER:
page_cur_move_to_prev(btr_pcur_get_page_cur(cursor));
break;
#ifdef UNIV_DEBUG
default:
ut_error;
#endif /* UNIV_DEBUG */
return(TRUE);
}
#ifdef UNIV_DEBUG
/* fall through */
case BTR_PCUR_BEFORE:
case BTR_PCUR_AFTER:
break;
default:
ut_error;
#endif /* UNIV_DEBUG */
}
mem_heap_free(heap);

6
storage/innodb_plugin/ChangeLog
View File

@ -1,3 +1,9 @@
2012-08-07 The InnoDB Team
* btr/btr0pcur.c, row/row0merge.c:
Fix Bug#14399148 INNODB TABLES UNDER LOAD PRODUCE DUPLICATE COPIES
OF ROWS IN QUERIES
2012-03-15 The InnoDB Team
* fil/fil0fil.c, ibuf/ibuf0ibuf.c, include/fil0fil.h,

61
storage/innodb_plugin/btr/btr0pcur.c
View File

@ -336,44 +336,39 @@ btr_pcur_restore_position_func(
/* Restore the old search mode */
cursor->search_mode = old_mode;
if (btr_pcur_is_on_user_rec(cursor)) {
switch (cursor->rel_pos) {
case BTR_PCUR_ON:
if (!cmp_dtuple_rec(
tuple, btr_pcur_get_rec(cursor),
rec_get_offsets(btr_pcur_get_rec(cursor),
index, NULL,
ULINT_UNDEFINED, &heap))) {
switch (cursor->rel_pos) {
case BTR_PCUR_ON:
if (btr_pcur_is_on_user_rec(cursor)
&& !cmp_dtuple_rec(
tuple, btr_pcur_get_rec(cursor),
rec_get_offsets(btr_pcur_get_rec(cursor),
index, NULL,
ULINT_UNDEFINED, &heap))) {
/* We have to store the NEW value for
the modify clock, since the cursor can
now be on a different page! But we can
retain the value of old_rec */
/* We have to store the NEW value for
the modify clock, since the cursor can
now be on a different page! But we can
retain the value of old_rec */
cursor->block_when_stored =
btr_pcur_get_block(cursor);
cursor->modify_clock =
buf_block_get_modify_clock(
cursor->block_when_stored);
cursor->old_stored = BTR_PCUR_OLD_STORED;
cursor->block_when_stored =
btr_pcur_get_block(cursor);
cursor->modify_clock =
buf_block_get_modify_clock(
cursor->block_when_stored);
cursor->old_stored = BTR_PCUR_OLD_STORED;
mem_heap_free(heap);
mem_heap_free(heap);
return(TRUE);
}
break;
case BTR_PCUR_BEFORE:
page_cur_move_to_next(btr_pcur_get_page_cur(cursor));
break;
case BTR_PCUR_AFTER:
page_cur_move_to_prev(btr_pcur_get_page_cur(cursor));
break;
#ifdef UNIV_DEBUG
default:
ut_error;
#endif /* UNIV_DEBUG */
return(TRUE);
}
#ifdef UNIV_DEBUG
/* fall through */
case BTR_PCUR_BEFORE:
case BTR_PCUR_AFTER:
break;
default:
ut_error;
#endif /* UNIV_DEBUG */
}
mem_heap_free(heap);

14
storage/innodb_plugin/row/row0merge.c
View File

@ -1214,11 +1214,25 @@ row_merge_read_clustered_index(
goto err_exit;
}
/* Store the cursor position on the last user
record on the page. */
btr_pcur_move_to_prev_on_page(&pcur);
/* Leaf pages must never be empty, unless
this is the only page in the index tree. */
ut_ad(btr_pcur_is_on_user_rec(&pcur)
|| buf_block_get_page_no(
btr_pcur_get_block(&pcur))
== clust_index->page);
btr_pcur_store_position(&pcur, &mtr);
mtr_commit(&mtr);
mtr_start(&mtr);
/* Restore position on the record, or its
predecessor if the record was purged
meanwhile. */
btr_pcur_restore_position(BTR_SEARCH_LEAF,
&pcur, &mtr);
/* Move to the successor of the original record. */
has_next = btr_pcur_move_to_next_user_rec(&pcur, &mtr);
}