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IB: redundant btr_pcur_move_to_prev_page() removed

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This commit is contained in:
Aleksey Midenkov 2017-04-12 23:19:13 +03:00
parent ecc6cd95c4
commit e72e3cd01f
2 changed files with 0 additions and 71 deletions
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60
storage/innobase/btr/btr0pcur.cc
View file

@ -452,66 +452,6 @@ btr_pcur_move_to_next_page(
ut_d(page_check_dir(next_page));
}
/*********************************************************//**
Moves the persistent cursor to the last record on the previous page. Releases the
latch on the current page, and bufferunfixes it. Note that there must not be
modifications on the current page, as then the x-latch can be released only in
mtr_commit. */
UNIV_INTERN
void
btr_pcur_move_to_prev_page(
/*=======================*/
btr_pcur_t* cursor, /*!< in: persistent cursor; must be on the
last record of the current page */
mtr_t* mtr) /*!< in: mtr */
{
ulint prev_page_no;
page_t* page;
buf_block_t* prev_block;
page_t* prev_page;
ulint mode;
ut_ad(cursor->pos_state == BTR_PCUR_IS_POSITIONED);
ut_ad(cursor->latch_mode != BTR_NO_LATCHES);
ut_ad(btr_pcur_is_before_first_on_page(cursor));
cursor->old_stored = false;
page = btr_pcur_get_page(cursor);
prev_page_no = btr_page_get_prev(page, mtr);
ut_ad(prev_page_no != FIL_NULL);
mode = cursor->latch_mode;
switch (mode) {
case BTR_SEARCH_TREE:
mode = BTR_SEARCH_LEAF;
break;
case BTR_MODIFY_TREE:
mode = BTR_MODIFY_LEAF;
}
buf_block_t* block = btr_pcur_get_block(cursor);
prev_block = btr_block_get(
page_id_t(block->page.id.space(), prev_page_no),
block->page.size, mode,
btr_pcur_get_btr_cur(cursor)->index, mtr);
prev_page = buf_block_get_frame(prev_block);
#ifdef UNIV_BTR_DEBUG
ut_a(page_is_comp(prev_page) == page_is_comp(page));
ut_a(btr_page_get_next(prev_page, mtr)
== btr_pcur_get_block(cursor)->page.id.page_no());
#endif /* UNIV_BTR_DEBUG */
btr_leaf_page_release(btr_pcur_get_block(cursor), mode, mtr);
page_cur_set_after_last(prev_block, btr_pcur_get_page_cur(cursor));
ut_d(page_check_dir(prev_page));
}
/*********************************************************//**
Moves the persistent cursor backward if it is on the first record of the page.
Commits mtr. Note that to prevent a possible deadlock, the operation

11
storage/innobase/include/btr0pcur.h
View file

@ -359,17 +359,6 @@ btr_pcur_move_to_next_page(
last record of the current page */
mtr_t* mtr); /*!< in: mtr */
/*********************************************************//**
Moves the persistent cursor to the last record on the previous page.
Releases the latch on the current page, and bufferunfixes it.
Note that there must not be modifications on the current page,
as then the x-latch can be released only in mtr_commit. */
void
btr_pcur_move_to_prev_page(
/*=======================*/
btr_pcur_t* cursor, /*!< in: persistent cursor; must be on the
last record of the current page */
mtr_t* mtr); /*!< in: mtr */
/*********************************************************//**
Moves the persistent cursor backward if it is on the first record
of the page. Releases the latch on the current page, and bufferunfixes
it. Note that to prevent a possible deadlock, the operation first