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544 lines
20 KiB
C
544 lines
20 KiB
C
/*****************************************************************************
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Copyright (c) 2014, 2016, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2017, 2023, MariaDB Corporation.
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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, Fifth Floor, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/******************************************************************//**
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@file include gis0rtree.h
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R-tree header file
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Created 2013/03/27 Jimmy Yang and Allen Lai
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***********************************************************************/
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#ifndef gis0rtree_h
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#define gis0rtree_h
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#include "btr0cur.h"
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#include "rem0types.h"
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/* Whether MBR 'a' contains 'b' */
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#define MBR_CONTAIN_CMP(a, b) \
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((((b)->xmin >= (a)->xmin) && ((b)->xmax <= (a)->xmax) \
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&& ((b)->ymin >= (a)->ymin) && ((b)->ymax <= (a)->ymax)))
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/* Whether MBR 'a' equals to 'b' */
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#define MBR_EQUAL_CMP(a, b) \
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((((b)->xmin == (a)->xmin) && ((b)->xmax == (a)->xmax)) \
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&& (((b)->ymin == (a)->ymin) && ((b)->ymax == (a)->ymax)))
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/* Whether MBR 'a' intersects 'b' */
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#define MBR_INTERSECT_CMP(a, b) \
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((((b)->xmin <= (a)->xmax) || ((b)->xmax >= (a)->xmin)) \
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&& (((b)->ymin <= (a)->ymax) || ((b)->ymax >= (a)->ymin)))
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/* Whether MBR 'a' and 'b' disjoint */
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#define MBR_DISJOINT_CMP(a, b) (!MBR_INTERSECT_CMP(a, b))
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/* Whether MBR 'a' within 'b' */
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#define MBR_WITHIN_CMP(a, b) \
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((((b)->xmin <= (a)->xmin) && ((b)->xmax >= (a)->xmax)) \
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&& (((b)->ymin <= (a)->ymin) && ((b)->ymax >= (a)->ymax)))
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/* Define it for rtree search mode checking. */
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#define RTREE_SEARCH_MODE(mode) \
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(((mode) >= PAGE_CUR_CONTAIN) && ((mode <= PAGE_CUR_RTREE_GET_FATHER)))
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/* Geometry data header */
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#define GEO_DATA_HEADER_SIZE 4
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/** Search for a spatial index leaf page record.
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@param cur cursor
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@param thr query thread
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@param tuple search tuple
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@param latch_mode latching mode
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@param mtr mini-transaction
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@param mode search mode */
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dberr_t rtr_search_leaf(btr_cur_t *cur, que_thr_t *thr, const dtuple_t *tuple,
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btr_latch_mode latch_mode, mtr_t *mtr,
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page_cur_mode_t mode= PAGE_CUR_RTREE_LOCATE)
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MY_ATTRIBUTE((nonnull(1,3,5), warn_unused_result));
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/** Search for inserting a spatial index leaf page record.
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@param cur cursor
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@param tuple search tuple
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@param latch_mode latching mode
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@param mtr mini-transaction */
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inline dberr_t rtr_insert_leaf(btr_cur_t *cur, que_thr_t *thr,
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const dtuple_t *tuple,
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btr_latch_mode latch_mode, mtr_t *mtr)
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{
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return rtr_search_leaf(cur, thr, tuple, latch_mode, mtr,
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PAGE_CUR_RTREE_INSERT);
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}
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/** Search for a spatial index leaf page record.
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@param pcur cursor
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@param thr query thread
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@param tuple search tuple
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@param mode search mode
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@param mtr mini-transaction */
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dberr_t rtr_search_leaf(btr_pcur_t *pcur, que_thr_t *thr,
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const dtuple_t *tuple,
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page_cur_mode_t mode, mtr_t *mtr)
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MY_ATTRIBUTE((nonnull, warn_unused_result));
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dberr_t rtr_search_to_nth_level(btr_cur_t *cur, que_thr_t *thr,
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const dtuple_t *tuple,
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btr_latch_mode latch_mode, mtr_t *mtr,
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page_cur_mode_t mode, ulint level)
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MY_ATTRIBUTE((nonnull(1,3,5), warn_unused_result));
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/**********************************************************************//**
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Builds a Rtree node pointer out of a physical record and a page number.
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@return own: node pointer */
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dtuple_t*
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rtr_index_build_node_ptr(
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/*=====================*/
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const dict_index_t* index, /*!< in: index */
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const rtr_mbr_t* mbr, /*!< in: mbr of lower page */
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const rec_t* rec, /*!< in: record for which to build node
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pointer */
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ulint page_no,/*!< in: page number to put in node
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pointer */
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mem_heap_t* heap); /*!< in: memory heap where pointer
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created */
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/*************************************************************//**
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Splits an R-tree index page to halves and inserts the tuple. It is assumed
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that mtr holds an x-latch to the index tree. NOTE: the tree x-latch is
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released within this function! NOTE that the operation of this
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function must always succeed, we cannot reverse it: therefore enough
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free disk space (2 pages) must be guaranteed to be available before
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this function is called.
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@return inserted record */
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rec_t*
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rtr_page_split_and_insert(
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/*======================*/
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ulint flags, /*!< in: undo logging and locking flags */
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btr_cur_t* cursor, /*!< in/out: cursor at which to insert; when the
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function returns, the cursor is positioned
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on the predecessor of the inserted record */
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rec_offs** offsets,/*!< out: offsets on inserted record */
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mem_heap_t** heap, /*!< in/out: pointer to memory heap, or NULL */
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const dtuple_t* tuple, /*!< in: tuple to insert */
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ulint n_ext, /*!< in: number of externally stored columns */
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mtr_t* mtr, /*!< in: mtr */
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dberr_t* err, /*!< out: error code */
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que_thr_t* thr); /*!< in: query thread */
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/*************************************************************//**
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Makes tree one level higher by splitting the root, and inserts the tuple.
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NOTE that the operation of this function must always succeed,
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we cannot reverse it: therefore enough free disk space must be
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guaranteed to be available before this function is called.
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@return inserted record */
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rec_t*
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rtr_root_raise_and_insert(
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ulint flags, /*!< in: undo logging and locking flags */
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btr_cur_t* cursor, /*!< in: cursor at which to insert: must be
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on the root page; when the function returns,
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the cursor is positioned on the predecessor
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of the inserted record */
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rec_offs** offsets,/*!< out: offsets on inserted record */
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mem_heap_t** heap, /*!< in/out: pointer to memory heap, or NULL */
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const dtuple_t* tuple, /*!< in: tuple to insert */
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ulint n_ext, /*!< in: number of externally stored columns */
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mtr_t* mtr, /*!< in: mtr */
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dberr_t* err, /*!< out: error code */
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que_thr_t* thr); /*!< in: query thread */
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/**************************************************************//**
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Sets the child node mbr in a node pointer. */
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UNIV_INLINE
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void
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rtr_page_cal_mbr(
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/*=============*/
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const dict_index_t* index, /*!< in: index */
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const buf_block_t* block, /*!< in: buffer block */
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rtr_mbr_t* mbr, /*!< out: MBR encapsulates the page */
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mem_heap_t* heap); /*!< in: heap for the memory
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allocation */
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/*************************************************************//**
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Find the next matching record. This function will first exhaust
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the copied record listed in the rtr_info->matches vector before
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moving to next page
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@return true if there is next qualified record found, otherwise(if
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exhausted) false */
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bool
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rtr_pcur_move_to_next(
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/*==================*/
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const dtuple_t* tuple, /*!< in: data tuple; NOTE: n_fields_cmp in
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tuple must be set so that it cannot get
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compared to the node ptr page number field! */
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page_cur_mode_t mode, /*!< in: cursor search mode */
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btr_pcur_t* cursor, /*!< in: persistent cursor; NOTE that the
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function may release the page latch */
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ulint cur_level,
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/*!< in: current level */
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mtr_t* mtr) /*!< in: mtr */
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MY_ATTRIBUTE((warn_unused_result));
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/****************************************************************//**
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Searches the right position in rtree for a page cursor. */
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bool
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rtr_cur_search_with_match(
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/*======================*/
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const buf_block_t* block, /*!< in: buffer block */
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dict_index_t* index, /*!< in: index 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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page_cur_t* cursor, /*!< in/out: page cursor */
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rtr_info_t* rtr_info);/*!< in/out: search stack */
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/****************************************************************//**
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Calculate the area increased for a new record
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@return area increased */
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double
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rtr_rec_cal_increase(
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/*=================*/
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const dtuple_t* dtuple, /*!< in: data tuple to insert, which
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cause area increase */
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const rec_t* rec, /*!< in: physical record which differs from
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dtuple in some of the common fields, or which
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has an equal number or more fields than
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dtuple */
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double* area); /*!< out: increased area */
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/****************************************************************//**
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Following the right link to find the proper block for insert.
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@return the proper block.*/
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dberr_t
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rtr_ins_enlarge_mbr(
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/*=================*/
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btr_cur_t* cursor, /*!< in: btr cursor */
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mtr_t* mtr); /*!< in: mtr */
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/**************************************************************//**
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push a nonleaf index node to the search path */
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UNIV_INLINE
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void
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rtr_non_leaf_stack_push(
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/*====================*/
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rtr_node_path_t* path, /*!< in/out: search path */
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uint32_t pageno, /*!< in: pageno to insert */
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node_seq_t seq_no, /*!< in: Node sequence num */
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ulint level, /*!< in: index level */
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uint32_t child_no, /*!< in: child page no */
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btr_pcur_t* cursor, /*!< in: position cursor */
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double mbr_inc); /*!< in: MBR needs to be
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enlarged */
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/**************************************************************//**
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push a nonleaf index node to the search path for insertion */
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void
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rtr_non_leaf_insert_stack_push(
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/*===========================*/
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dict_index_t* index, /*!< in: index descriptor */
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rtr_node_path_t* path, /*!< in/out: search path */
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ulint level, /*!< in: index level */
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const buf_block_t* block, /*!< in: block of the page */
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const rec_t* rec, /*!< in: positioned record */
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double mbr_inc); /*!< in: MBR needs to be
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enlarged */
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#define rtr_get_new_ssn_id(index) (index)->assign_ssn()
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#define rtr_get_current_ssn_id(index) (index)->ssn()
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/********************************************************************//**
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Create a RTree search info structure */
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rtr_info_t*
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rtr_create_rtr_info(
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/******************/
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bool need_prdt, /*!< in: Whether predicate lock is
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needed */
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bool init_matches, /*!< in: Whether to initiate the
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"matches" structure for collecting
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matched leaf records */
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que_thr_t* thr, /*!< in/out: query thread */
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btr_cur_t* cursor); /*!< in: tree search cursor */
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/********************************************************************//**
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Update a btr_cur_t with rtr_info */
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void
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rtr_info_update_btr(
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/******************/
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btr_cur_t* cursor, /*!< in/out: tree cursor */
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rtr_info_t* rtr_info); /*!< in: rtr_info to set to the
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cursor */
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/********************************************************************//**
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Update a btr_cur_t with rtr_info */
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void
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rtr_init_rtr_info(
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/****************/
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rtr_info_t* rtr_info, /*!< in: rtr_info to set to the
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cursor */
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bool need_prdt, /*!< in: Whether predicate lock is
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needed */
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btr_cur_t* cursor, /*!< in: tree search cursor */
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dict_index_t* index, /*!< in: index structure */
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bool reinit); /*!< in: Whether this is a reinit */
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/**************************************************************//**
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Clean up Rtree cursor */
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void
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rtr_clean_rtr_info(
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/*===============*/
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rtr_info_t* rtr_info, /*!< in: RTree search info */
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bool free_all); /*!< in: need to free rtr_info itself */
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/****************************************************************//**
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Get the bounding box content from an index record*/
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void
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rtr_get_mbr_from_rec(
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/*=================*/
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const rec_t* rec, /*!< in: data tuple */
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const rec_offs* offsets,/*!< in: offsets array */
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rtr_mbr_t* mbr); /*!< out MBR */
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/****************************************************************//**
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Get the bounding box content from a MBR data record */
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void
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rtr_get_mbr_from_tuple(
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/*===================*/
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const dtuple_t* dtuple, /*!< in: data tuple */
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rtr_mbr* mbr); /*!< out: mbr to fill */
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/* Get the rtree page father.
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@param[in,out] mtr mtr
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@param[in] sea_cur search cursor, contains information
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about parent nodes in search
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@param[in,out] cursor cursor on node pointer record,
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its page x-latched
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@param[in,out] thr query thread
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@return whether the cursor was successfully positioned */
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bool rtr_page_get_father(mtr_t *mtr, btr_cur_t *sea_cur, btr_cur_t *cursor,
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que_thr_t *thr)
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MY_ATTRIBUTE((nonnull(1,3), warn_unused_result));
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/************************************************************//**
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Returns the father block to a page. It is assumed that mtr holds
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an X or SX latch on the tree.
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@return rec_get_offsets() of the node pointer record */
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rec_offs*
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rtr_page_get_father_block(
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/*======================*/
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rec_offs* offsets,/*!< in: work area for the return value */
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mem_heap_t* heap, /*!< in: memory heap to use */
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btr_cur_t* sea_cur,/*!< in: search cursor, contains information
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about parent nodes in search */
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btr_cur_t* cursor, /*!< out: cursor on node pointer record,
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its page x-latched */
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que_thr_t* thr, /*!< in/out: query thread */
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mtr_t* mtr); /*!< in/out: mtr */
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/**************************************************************//**
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Store the parent path cursor
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@return number of cursor stored */
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ulint
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rtr_store_parent_path(
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/*==================*/
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const buf_block_t* block, /*!< in: block of the page */
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btr_cur_t* btr_cur,/*!< in/out: persistent cursor */
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btr_latch_mode latch_mode,
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/*!< in: latch_mode */
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ulint level, /*!< in: index level */
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mtr_t* mtr); /*!< in: mtr */
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/**************************************************************//**
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Initializes and opens a persistent cursor to an index tree. It should be
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closed with btr_pcur_close. */
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bool rtr_search(
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const dtuple_t* tuple, /*!< in: tuple on which search done */
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btr_latch_mode latch_mode,/*!< in: BTR_MODIFY_LEAF, ... */
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btr_pcur_t* cursor, /*!< in: memory buffer for persistent cursor */
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que_thr_t* thr, /*!< in/out; query thread */
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mtr_t* mtr) /*!< in: mtr */
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MY_ATTRIBUTE((warn_unused_result));
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/*********************************************************//**
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Returns the R-Tree node stored in the parent search path
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@return pointer to R-Tree cursor component */
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UNIV_INLINE
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node_visit_t*
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rtr_get_parent_node(
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/*================*/
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btr_cur_t* btr_cur, /*!< in: persistent cursor */
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ulint level, /*!< in: index level of buffer page */
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ulint is_insert); /*!< in: whether it is insert */
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/*********************************************************//**
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Returns the R-Tree cursor stored in the parent search path
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@return pointer to R-Tree cursor component */
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UNIV_INLINE
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btr_pcur_t*
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rtr_get_parent_cursor(
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/*==================*/
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btr_cur_t* btr_cur, /*!< in: persistent cursor */
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ulint level, /*!< in: index level of buffer page */
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ulint is_insert); /*!< in: whether insert operation */
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MY_ATTRIBUTE((warn_unused_result))
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/*************************************************************//**
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Copy recs from a page to new_block of rtree.
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@return error code */
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dberr_t
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rtr_page_copy_rec_list_end_no_locks(
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/*================================*/
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buf_block_t* new_block, /*!< in: index page to copy to */
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buf_block_t* block, /*!< in: index page of rec */
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rec_t* rec, /*!< in: record on page */
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dict_index_t* index, /*!< in: record descriptor */
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mem_heap_t* heap, /*!< in/out: heap memory */
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rtr_rec_move_t* rec_move, /*!< in: recording records moved */
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ulint max_move, /*!< in: num of rec to move */
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ulint* num_moved, /*!< out: num of rec to move */
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mtr_t* mtr); /*!< in: mtr */
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MY_ATTRIBUTE((warn_unused_result))
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/*************************************************************//**
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Copy recs till a specified rec from a page to new_block of rtree.
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@return error code */
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dberr_t
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rtr_page_copy_rec_list_start_no_locks(
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/*==================================*/
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buf_block_t* new_block, /*!< in: index page to copy to */
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buf_block_t* block, /*!< in: index page of rec */
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rec_t* rec, /*!< in: record on page */
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dict_index_t* index, /*!< in: record descriptor */
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mem_heap_t* heap, /*!< in/out: heap memory */
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rtr_rec_move_t* rec_move, /*!< in: recording records moved */
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ulint max_move, /*!< in: num of rec to move */
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ulint* num_moved, /*!< out: num of rec to move */
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mtr_t* mtr); /*!< in: mtr */
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/****************************************************************//**
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Merge 2 mbrs and update the the mbr that cursor is on. */
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void
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rtr_merge_and_update_mbr(
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/*=====================*/
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btr_cur_t* cursor, /*!< in/out: cursor */
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btr_cur_t* cursor2, /*!< in: the other cursor */
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rec_offs* offsets, /*!< in: rec offsets */
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rec_offs* offsets2, /*!< in: rec offsets */
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page_t* child_page, /*!< in: the child page. */
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mtr_t* mtr); /*!< in: mtr */
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/*************************************************************//**
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Deletes on the upper level the node pointer to a page. */
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void
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rtr_node_ptr_delete(
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/*================*/
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btr_cur_t* cursor, /*!< in: search cursor, contains information
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about parent nodes in search */
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mtr_t* mtr); /*!< in: mtr */
|
|
|
|
/****************************************************************//**
|
|
Check two MBRs are identical or need to be merged */
|
|
bool
|
|
rtr_merge_mbr_changed(
|
|
/*==================*/
|
|
btr_cur_t* cursor, /*!< in: cursor */
|
|
btr_cur_t* cursor2, /*!< in: the other cursor */
|
|
rec_offs* offsets, /*!< in: rec offsets */
|
|
rec_offs* offsets2, /*!< in: rec offsets */
|
|
rtr_mbr_t* new_mbr); /*!< out: MBR to update */
|
|
|
|
|
|
/**************************************************************//**
|
|
Update the mbr field of a spatial index row. */
|
|
void
|
|
rtr_update_mbr_field(
|
|
/*=================*/
|
|
btr_cur_t* cursor, /*!< in: cursor pointed to rec.*/
|
|
rec_offs* offsets, /*!< in: offsets on rec. */
|
|
btr_cur_t* cursor2, /*!< in/out: cursor pointed to rec
|
|
that should be deleted.
|
|
this cursor is for btr_compress to
|
|
delete the merged page's father rec.*/
|
|
page_t* child_page, /*!< in: child page. */
|
|
rtr_mbr_t* new_mbr, /*!< in: the new mbr. */
|
|
rec_t* new_rec, /*!< in: rec to use */
|
|
mtr_t* mtr); /*!< in: mtr */
|
|
|
|
/**************************************************************//**
|
|
Check whether a Rtree page is child of a parent page
|
|
@return true if there is child/parent relationship */
|
|
bool
|
|
rtr_check_same_block(
|
|
/*=================*/
|
|
dict_index_t* index, /*!< in: index tree */
|
|
btr_cur_t* cur, /*!< in/out: position at the parent entry
|
|
pointing to the child if successful */
|
|
buf_block_t* parentb,/*!< in: parent page to check */
|
|
mem_heap_t* heap); /*!< in: memory heap */
|
|
|
|
/*********************************************************************//**
|
|
Sets pointer to the data and length in a field. */
|
|
UNIV_INLINE
|
|
void
|
|
rtr_write_mbr(
|
|
/*==========*/
|
|
byte* data, /*!< out: data */
|
|
const rtr_mbr_t* mbr); /*!< in: data */
|
|
|
|
/*********************************************************************//**
|
|
Sets pointer to the data and length in a field. */
|
|
UNIV_INLINE
|
|
void
|
|
rtr_read_mbr(
|
|
/*==========*/
|
|
const byte* data, /*!< in: data */
|
|
rtr_mbr_t* mbr); /*!< out: data */
|
|
|
|
/**************************************************************//**
|
|
Check whether a discarding page is in anyone's search path */
|
|
void
|
|
rtr_check_discard_page(
|
|
/*===================*/
|
|
dict_index_t* index, /*!< in: index */
|
|
btr_cur_t* cursor, /*!< in: cursor on the page to discard: not on
|
|
the root page */
|
|
buf_block_t* block); /*!< in: block of page to be discarded */
|
|
|
|
/********************************************************************//**
|
|
Reinitialize a RTree search info */
|
|
UNIV_INLINE
|
|
void
|
|
rtr_info_reinit_in_cursor(
|
|
/************************/
|
|
btr_cur_t* cursor, /*!< in/out: tree cursor */
|
|
dict_index_t* index, /*!< in: index struct */
|
|
bool need_prdt); /*!< in: Whether predicate lock is
|
|
needed */
|
|
|
|
/** Estimates the number of rows in a given area.
|
|
@param[in] index index
|
|
@param[in] tuple range tuple containing mbr, may also be empty tuple
|
|
@param[in] mode search mode
|
|
@return estimated number of rows */
|
|
ha_rows
|
|
rtr_estimate_n_rows_in_range(
|
|
dict_index_t* index,
|
|
const dtuple_t* tuple,
|
|
page_cur_mode_t mode);
|
|
|
|
#include "gis0rtree.inl"
|
|
#endif /*!< gis0rtree.h */
|