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c868acdf65
WL#7682 in MySQL 5.7 introduced the possibility to create light-weight temporary tables in InnoDB. These are called 'intrinsic temporary tables' in InnoDB, and in MySQL 5.7, they can be created by the optimizer for sorting or buffering data in query processing. In MariaDB 10.2, the optimizer temporary tables cannot be created in InnoDB, so we should remove the dead code and related data structures.
396 lines
14 KiB
C
396 lines
14 KiB
C
/*****************************************************************************
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Copyright (c) 1994, 2016, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/********************************************************************//**
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@file include/page0cur.h
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The page cursor
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Created 10/4/1994 Heikki Tuuri
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*************************************************************************/
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#ifndef page0cur_h
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#define page0cur_h
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#include "univ.i"
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#include "buf0types.h"
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#include "page0page.h"
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#include "rem0rec.h"
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#include "data0data.h"
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#include "mtr0mtr.h"
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#include "gis0type.h"
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#define PAGE_CUR_ADAPT
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#ifdef UNIV_DEBUG
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/*********************************************************//**
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Gets pointer to the page frame where the cursor is positioned.
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@return page */
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UNIV_INLINE
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page_t*
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page_cur_get_page(
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/*==============*/
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page_cur_t* cur); /*!< in: page cursor */
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/*********************************************************//**
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Gets pointer to the buffer block where the cursor is positioned.
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@return page */
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UNIV_INLINE
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buf_block_t*
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page_cur_get_block(
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/*===============*/
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page_cur_t* cur); /*!< in: page cursor */
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/*********************************************************//**
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Gets pointer to the page frame where the cursor is positioned.
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@return page */
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UNIV_INLINE
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page_zip_des_t*
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page_cur_get_page_zip(
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/*==================*/
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page_cur_t* cur); /*!< in: page cursor */
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/*********************************************************//**
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Gets the record where the cursor is positioned.
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@return record */
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UNIV_INLINE
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rec_t*
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page_cur_get_rec(
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/*=============*/
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page_cur_t* cur); /*!< in: page cursor */
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#else /* UNIV_DEBUG */
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# define page_cur_get_page(cur) page_align((cur)->rec)
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# define page_cur_get_block(cur) (cur)->block
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# define page_cur_get_page_zip(cur) buf_block_get_page_zip((cur)->block)
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# define page_cur_get_rec(cur) (cur)->rec
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#endif /* UNIV_DEBUG */
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/*********************************************************//**
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Sets the cursor object to point before the first user record
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on the page. */
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UNIV_INLINE
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void
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page_cur_set_before_first(
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/*======================*/
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const buf_block_t* block, /*!< in: index page */
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page_cur_t* cur); /*!< in: cursor */
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/*********************************************************//**
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Sets the cursor object to point after the last user record on
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the page. */
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UNIV_INLINE
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void
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page_cur_set_after_last(
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/*====================*/
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const buf_block_t* block, /*!< in: index page */
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page_cur_t* cur); /*!< in: cursor */
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/*********************************************************//**
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Returns TRUE if the cursor is before first user record on page.
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@return TRUE if at start */
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UNIV_INLINE
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ibool
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page_cur_is_before_first(
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/*=====================*/
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const page_cur_t* cur); /*!< in: cursor */
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/*********************************************************//**
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Returns TRUE if the cursor is after last user record.
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@return TRUE if at end */
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UNIV_INLINE
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ibool
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page_cur_is_after_last(
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/*===================*/
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const page_cur_t* cur); /*!< in: cursor */
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/**********************************************************//**
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Positions the cursor on the given record. */
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UNIV_INLINE
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void
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page_cur_position(
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/*==============*/
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const rec_t* rec, /*!< in: record on a page */
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const buf_block_t* block, /*!< in: buffer block containing
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the record */
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page_cur_t* cur); /*!< out: page cursor */
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/**********************************************************//**
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Moves the cursor to the next record on page. */
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UNIV_INLINE
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void
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page_cur_move_to_next(
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/*==================*/
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page_cur_t* cur); /*!< in/out: cursor; must not be after last */
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/**********************************************************//**
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Moves the cursor to the previous record on page. */
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UNIV_INLINE
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void
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page_cur_move_to_prev(
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/*==================*/
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page_cur_t* cur); /*!< in/out: cursor; not before first */
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#ifndef UNIV_HOTBACKUP
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/***********************************************************//**
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Inserts a record next to page cursor. Returns pointer to inserted record if
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succeed, i.e., enough space available, NULL otherwise. The cursor stays at
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the same logical position, but the physical position may change if it is
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pointing to a compressed page that was reorganized.
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IMPORTANT: The caller will have to update IBUF_BITMAP_FREE
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if this is a compressed leaf page in a secondary index.
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This has to be done either within the same mini-transaction,
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or by invoking ibuf_reset_free_bits() before mtr_commit().
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@return pointer to record if succeed, NULL otherwise */
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UNIV_INLINE
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rec_t*
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page_cur_tuple_insert(
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/*==================*/
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page_cur_t* cursor, /*!< in/out: a page cursor */
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const dtuple_t* tuple, /*!< in: pointer to a data tuple */
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dict_index_t* index, /*!< in: record descriptor */
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ulint** offsets,/*!< out: offsets on *rec */
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mem_heap_t** heap, /*!< in/out: pointer to memory heap, or NULL */
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ulint n_ext, /*!< in: number of externally stored columns */
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mtr_t* mtr, /*!< in: mini-transaction handle, or NULL */
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bool use_cache = false)
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/*!< in: if true, then use record cache to
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hold the tuple converted record. */
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MY_ATTRIBUTE((nonnull(1,2,3,4,5), warn_unused_result));
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#endif /* !UNIV_HOTBACKUP */
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/***********************************************************//**
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Inserts a record next to page cursor. Returns pointer to inserted record if
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succeed, i.e., enough space available, NULL otherwise. The cursor stays at
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the same logical position, but the physical position may change if it is
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pointing to a compressed page that was reorganized.
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IMPORTANT: The caller will have to update IBUF_BITMAP_FREE
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if this is a compressed leaf page in a secondary index.
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This has to be done either within the same mini-transaction,
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or by invoking ibuf_reset_free_bits() before mtr_commit().
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@return pointer to record if succeed, NULL otherwise */
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UNIV_INLINE
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rec_t*
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page_cur_rec_insert(
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/*================*/
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page_cur_t* cursor, /*!< in/out: a page cursor */
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const rec_t* rec, /*!< in: record to insert */
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dict_index_t* index, /*!< in: record descriptor */
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ulint* offsets,/*!< in/out: rec_get_offsets(rec, index) */
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mtr_t* mtr); /*!< in: mini-transaction handle, or NULL */
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/***********************************************************//**
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Inserts a record next to page cursor on an uncompressed page.
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Returns pointer to inserted record if succeed, i.e., enough
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space available, NULL otherwise. The cursor stays at the same position.
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@return pointer to record if succeed, NULL otherwise */
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rec_t*
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page_cur_insert_rec_low(
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/*====================*/
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rec_t* current_rec,/*!< in: pointer to current record after
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which the new record is inserted */
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dict_index_t* index, /*!< in: record descriptor */
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const rec_t* rec, /*!< in: pointer to a physical record */
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ulint* offsets,/*!< in/out: rec_get_offsets(rec, index) */
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mtr_t* mtr) /*!< in: mini-transaction handle, or NULL */
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MY_ATTRIBUTE((nonnull(1,2,3,4), warn_unused_result));
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/***********************************************************//**
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Inserts a record next to page cursor on a compressed and uncompressed
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page. Returns pointer to inserted record if succeed, i.e.,
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enough space available, NULL otherwise.
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The cursor stays at the same position.
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IMPORTANT: The caller will have to update IBUF_BITMAP_FREE
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if this is a compressed leaf page in a secondary index.
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This has to be done either within the same mini-transaction,
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or by invoking ibuf_reset_free_bits() before mtr_commit().
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@return pointer to record if succeed, NULL otherwise */
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rec_t*
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page_cur_insert_rec_zip(
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/*====================*/
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page_cur_t* cursor, /*!< in/out: page cursor */
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dict_index_t* index, /*!< in: record descriptor */
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const rec_t* rec, /*!< in: pointer to a physical record */
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ulint* offsets,/*!< in/out: rec_get_offsets(rec, index) */
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mtr_t* mtr) /*!< in: mini-transaction handle, or NULL */
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MY_ATTRIBUTE((nonnull(1,2,3,4), warn_unused_result));
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/*************************************************************//**
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Copies records from page to a newly created page, from a given record onward,
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including that record. Infimum and supremum records are not copied.
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IMPORTANT: The caller will have to update IBUF_BITMAP_FREE
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if this is a compressed leaf page in a secondary index.
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This has to be done either within the same mini-transaction,
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or by invoking ibuf_reset_free_bits() before mtr_commit(). */
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void
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page_copy_rec_list_end_to_created_page(
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/*===================================*/
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page_t* new_page, /*!< in/out: index page to copy to */
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rec_t* rec, /*!< in: first record to copy */
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dict_index_t* index, /*!< in: record descriptor */
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mtr_t* mtr); /*!< in: mtr */
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/***********************************************************//**
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Deletes a record at the page cursor. The cursor is moved to the
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next record after the deleted one. */
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void
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page_cur_delete_rec(
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/*================*/
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page_cur_t* cursor, /*!< in/out: a page cursor */
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const dict_index_t* index, /*!< in: record descriptor */
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const ulint* offsets,/*!< in: rec_get_offsets(
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cursor->rec, index) */
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mtr_t* mtr); /*!< in: mini-transaction handle */
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#ifndef UNIV_HOTBACKUP
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/** Search the right position for a page cursor.
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@param[in] block buffer block
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@param[in] index index tree
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@param[in] tuple data tuple
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@param[in] mode PAGE_CUR_L, PAGE_CUR_LE, PAGE_CUR_G, or PAGE_CUR_GE
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@param[out] cursor page cursor
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@return number of matched fields on the left */
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UNIV_INLINE
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ulint
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page_cur_search(
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const buf_block_t* block,
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const dict_index_t* index,
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const dtuple_t* tuple,
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page_cur_mode_t mode,
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page_cur_t* cursor);
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/** Search the right position for a page cursor.
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@param[in] block buffer block
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@param[in] index index tree
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@param[in] tuple data tuple
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@param[out] cursor page cursor
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@return number of matched fields on the left */
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UNIV_INLINE
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ulint
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page_cur_search(
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const buf_block_t* block,
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const dict_index_t* index,
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const dtuple_t* tuple,
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page_cur_t* cursor);
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/****************************************************************//**
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Searches the right position for a page cursor. */
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void
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page_cur_search_with_match(
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/*=======================*/
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const buf_block_t* block, /*!< in: buffer block */
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const dict_index_t* index, /*!< in: record descriptor */
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const dtuple_t* tuple, /*!< in: data tuple */
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page_cur_mode_t mode, /*!< in: PAGE_CUR_L,
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PAGE_CUR_LE, PAGE_CUR_G, or
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PAGE_CUR_GE */
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ulint* iup_matched_fields,
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/*!< in/out: already matched
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fields in upper limit record */
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ulint* ilow_matched_fields,
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/*!< in/out: already matched
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fields in lower limit record */
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page_cur_t* cursor, /*!< out: page cursor */
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rtr_info_t* rtr_info);/*!< in/out: rtree search stack */
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/** Search the right position for a page cursor.
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@param[in] block buffer block
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@param[in] index index tree
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@param[in] tuple key to be searched for
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@param[in] mode search mode
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@param[in,out] iup_matched_fields already matched fields in the
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upper limit record
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@param[in,out] iup_matched_bytes already matched bytes in the
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first partially matched field in the upper limit record
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@param[in,out] ilow_matched_fields already matched fields in the
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lower limit record
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@param[in,out] ilow_matched_bytes already matched bytes in the
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first partially matched field in the lower limit record
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@param[out] cursor page cursor */
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void
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page_cur_search_with_match_bytes(
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const buf_block_t* block,
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const dict_index_t* index,
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const dtuple_t* tuple,
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page_cur_mode_t mode,
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ulint* iup_matched_fields,
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ulint* iup_matched_bytes,
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ulint* ilow_matched_fields,
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ulint* ilow_matched_bytes,
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page_cur_t* cursor);
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/***********************************************************//**
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Positions a page cursor on a randomly chosen user record on a page. If there
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are no user records, sets the cursor on the infimum record. */
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void
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page_cur_open_on_rnd_user_rec(
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/*==========================*/
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buf_block_t* block, /*!< in: page */
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page_cur_t* cursor);/*!< out: page cursor */
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#endif /* !UNIV_HOTBACKUP */
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/***********************************************************//**
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Parses a log record of a record insert on a page.
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@return end of log record or NULL */
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byte*
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page_cur_parse_insert_rec(
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/*======================*/
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ibool is_short,/*!< in: TRUE if short inserts */
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const byte* ptr, /*!< in: buffer */
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const byte* end_ptr,/*!< in: buffer end */
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buf_block_t* block, /*!< in: page or NULL */
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dict_index_t* index, /*!< in: record descriptor */
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mtr_t* mtr); /*!< in: mtr or NULL */
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/**********************************************************//**
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Parses a log record of copying a record list end to a new created page.
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@return end of log record or NULL */
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byte*
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page_parse_copy_rec_list_to_created_page(
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/*=====================================*/
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byte* ptr, /*!< in: buffer */
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byte* end_ptr,/*!< in: buffer end */
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buf_block_t* block, /*!< in: page or NULL */
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dict_index_t* index, /*!< in: record descriptor */
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mtr_t* mtr); /*!< in: mtr or NULL */
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/***********************************************************//**
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Parses log record of a record delete on a page.
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@return pointer to record end or NULL */
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byte*
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page_cur_parse_delete_rec(
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/*======================*/
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byte* ptr, /*!< in: buffer */
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byte* end_ptr,/*!< in: buffer end */
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buf_block_t* block, /*!< in: page or NULL */
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dict_index_t* index, /*!< in: record descriptor */
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mtr_t* mtr); /*!< in: mtr or NULL */
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/*******************************************************//**
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Removes the record from a leaf page. This function does not log
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any changes. It is used by the IMPORT tablespace functions.
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@return true if success, i.e., the page did not become too empty */
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bool
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page_delete_rec(
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/*============*/
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const dict_index_t* index, /*!< in: The index that the record
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belongs to */
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page_cur_t* pcur, /*!< in/out: page cursor on record
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to delete */
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page_zip_des_t* page_zip,/*!< in: compressed page descriptor */
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const ulint* offsets);/*!< in: offsets for record */
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/** Index page cursor */
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struct page_cur_t{
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const dict_index_t* index;
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rec_t* rec; /*!< pointer to a record on page */
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ulint* offsets;
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buf_block_t* block; /*!< pointer to the block containing rec */
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};
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#ifndef UNIV_NONINL
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#include "page0cur.ic"
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#endif
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#endif
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