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Diffstat (limited to 'storage/xtradb/include/btr0cur.ic')
| -rw-r--r-- | storage/xtradb/include/btr0cur.ic | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/storage/xtradb/include/btr0cur.ic b/storage/xtradb/include/btr0cur.ic deleted file mode 100644 index 43ee3304c0e..00000000000 --- a/storage/xtradb/include/btr0cur.ic +++ /dev/null @@ -1,223 +0,0 @@ -/***************************************************************************** - -Copyright (c) 1994, 2014, Oracle and/or its affiliates. All Rights Reserved. - -This program is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License as published by the Free Software -Foundation; version 2 of the License. - -This program is distributed in the hope that it will be useful, but WITHOUT -ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - -You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., -51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA - -*****************************************************************************/ - -/**************************************************//** -@file include/btr0cur.ic -The index tree cursor - -Created 10/16/1994 Heikki Tuuri -*******************************************************/ - -#ifndef UNIV_HOTBACKUP -#include "btr0btr.h" - -#ifdef UNIV_DEBUG -# define LIMIT_OPTIMISTIC_INSERT_DEBUG(NREC, CODE)\ -if (btr_cur_limit_optimistic_insert_debug > 1\ - && (NREC) >= (ulint)btr_cur_limit_optimistic_insert_debug) {\ - CODE;\ -} -#else -# define LIMIT_OPTIMISTIC_INSERT_DEBUG(NREC, CODE) -#endif /* UNIV_DEBUG */ - -#ifdef UNIV_DEBUG -/*********************************************************//** -Returns the page cursor component of a tree cursor. -@return pointer to page cursor component */ -UNIV_INLINE -page_cur_t* -btr_cur_get_page_cur( -/*=================*/ - const btr_cur_t* cursor) /*!< in: tree cursor */ -{ - return(&((btr_cur_t*) cursor)->page_cur); -} - -/*********************************************************//** -Returns the buffer block on which the tree cursor is positioned. -@return pointer to buffer block */ -UNIV_INLINE -buf_block_t* -btr_cur_get_block( -/*==============*/ - const btr_cur_t* cursor) /*!< in: tree cursor */ -{ - return(page_cur_get_block(btr_cur_get_page_cur(cursor))); -} - -/*********************************************************//** -Returns the record pointer of a tree cursor. -@return pointer to record */ -UNIV_INLINE -rec_t* -btr_cur_get_rec( -/*============*/ - const btr_cur_t* cursor) /*!< in: tree cursor */ -{ - return(page_cur_get_rec(btr_cur_get_page_cur(cursor))); -} -#endif /* UNIV_DEBUG */ - -/*********************************************************//** -Returns the compressed page on which the tree cursor is positioned. -@return pointer to compressed page, or NULL if the page is not compressed */ -UNIV_INLINE -page_zip_des_t* -btr_cur_get_page_zip( -/*=================*/ - btr_cur_t* cursor) /*!< in: tree cursor */ -{ - return(buf_block_get_page_zip(btr_cur_get_block(cursor))); -} - -/*********************************************************//** -Invalidates a tree cursor by setting record pointer to NULL. */ -UNIV_INLINE -void -btr_cur_invalidate( -/*===============*/ - btr_cur_t* cursor) /*!< in: tree cursor */ -{ - page_cur_invalidate(&(cursor->page_cur)); -} - -/*********************************************************//** -Returns the page of a tree cursor. -@return pointer to page */ -UNIV_INLINE -page_t* -btr_cur_get_page( -/*=============*/ - btr_cur_t* cursor) /*!< in: tree cursor */ -{ - return(page_align(page_cur_get_rec(&(cursor->page_cur)))); -} - -/*********************************************************//** -Positions a tree cursor at a given record. */ -UNIV_INLINE -void -btr_cur_position( -/*=============*/ - dict_index_t* index, /*!< in: index */ - rec_t* rec, /*!< in: record in tree */ - buf_block_t* block, /*!< in: buffer block of rec */ - btr_cur_t* cursor) /*!< out: cursor */ -{ - ut_ad(page_align(rec) == block->frame); - - page_cur_position(rec, block, btr_cur_get_page_cur(cursor)); - - cursor->index = index; -} - -/*********************************************************************//** -Checks if compressing an index page where a btr cursor is placed makes -sense. -@return TRUE if compression is recommended */ -UNIV_INLINE -ibool -btr_cur_compress_recommendation( -/*============================*/ - btr_cur_t* cursor, /*!< in: btr cursor */ - mtr_t* mtr) /*!< in: mtr */ -{ - const page_t* page; - - ut_ad(mtr_memo_contains(mtr, btr_cur_get_block(cursor), - MTR_MEMO_PAGE_X_FIX)); - - page = btr_cur_get_page(cursor); - - LIMIT_OPTIMISTIC_INSERT_DEBUG(page_get_n_recs(page) * 2, - return(FALSE)); - - if ((page_get_data_size(page) < BTR_CUR_PAGE_COMPRESS_LIMIT) - || ((btr_page_get_next(page, mtr) == FIL_NULL) - && (btr_page_get_prev(page, mtr) == FIL_NULL))) { - - /* The page fillfactor has dropped below a predefined - minimum value OR the level in the B-tree contains just - one page: we recommend compression if this is not the - root page. */ - - return(dict_index_get_page(cursor->index) - != page_get_page_no(page)); - } - - return(FALSE); -} - -/*********************************************************************//** -Checks if the record on which the cursor is placed can be deleted without -making tree compression necessary (or, recommended). -@return TRUE if can be deleted without recommended compression */ -UNIV_INLINE -ibool -btr_cur_can_delete_without_compress( -/*================================*/ - btr_cur_t* cursor, /*!< in: btr cursor */ - ulint rec_size,/*!< in: rec_get_size(btr_cur_get_rec(cursor))*/ - mtr_t* mtr) /*!< in: mtr */ -{ - page_t* page; - - ut_ad(mtr_memo_contains(mtr, btr_cur_get_block(cursor), - MTR_MEMO_PAGE_X_FIX)); - - page = btr_cur_get_page(cursor); - - if ((page_get_data_size(page) - rec_size < BTR_CUR_PAGE_COMPRESS_LIMIT) - || ((btr_page_get_next(page, mtr) == FIL_NULL) - && (btr_page_get_prev(page, mtr) == FIL_NULL)) - || (page_get_n_recs(page) < 2)) { - - /* The page fillfactor will drop below a predefined - minimum value, OR the level in the B-tree contains just - one page, OR the page will become empty: we recommend - compression if this is not the root page. */ - - return(dict_index_get_page(cursor->index) - == page_get_page_no(page)); - } - - return(TRUE); -} - -/*******************************************************************//** -Determine if an operation on off-page columns is an update. -@return TRUE if op != BTR_STORE_INSERT */ -UNIV_INLINE -ibool -btr_blob_op_is_update( -/*==================*/ - enum blob_op op) /*!< in: operation */ -{ - switch (op) { - case BTR_STORE_INSERT: - return(FALSE); - case BTR_STORE_INSERT_UPDATE: - case BTR_STORE_UPDATE: - return(TRUE); - } - - ut_ad(0); - return(FALSE); -} -#endif /* !UNIV_HOTBACKUP */ |