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/*****************************************************************************
Copyright (c) 2014, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2018, 2023, MariaDB Corporation.
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, Fifth Floor, Boston, MA 02110-1335 USA
*****************************************************************************/
/******************************************************************//**
@file include gis0type.h
R-tree header file
Created 2013/03/27 Jimmy Yang
***********************************************************************/
#ifndef gis0type_h
#define gis0type_h
#include "buf0buf.h"
#include "data0type.h"
#include "data0types.h"
#include "dict0types.h"
#include "ut0vec.h"
#include "gis0geo.h"
#include <vector>
#include <forward_list>
/** Node Sequence Number. Only updated when page splits */
typedef uint32_t node_seq_t;
/* RTree internal non-leaf Nodes to be searched, from root to leaf */
struct node_visit_t {
uint32_t page_no; /*!< the page number */
node_seq_t seq_no; /*!< the SSN (split sequence number */
ulint level; /*!< the page's index level */
uint32_t child_no; /*!< child page num if for parent
recording */
btr_pcur_t* cursor; /*!< cursor structure if we positioned
FIXME: there is no need to use whole
btr_pcur_t, just the position related
members */
double mbr_inc; /*!< whether this node needs to be
enlarged for insertion */
};
typedef std::vector<node_visit_t, ut_allocator<node_visit_t> > rtr_node_path_t;
typedef struct rtr_rec {
rec_t* r_rec; /*!< matched record */
bool locked; /*!< whether the record locked */
} rtr_rec_t;
typedef std::vector<rtr_rec_t, ut_allocator<rtr_rec_t> > rtr_rec_vector;
/* Structure for matched records on the leaf page */
typedef struct matched_rec {
buf_block_t* block; /*!< the shadow buffer block */
ulint used; /*!< memory used */
rtr_rec_vector* matched_recs; /*!< vector holding the matching rec */
mysql_mutex_t rtr_match_mutex;/*!< mutex protect the match_recs
vector */
bool valid; /*!< whether result in matched_recs
or this search is valid (page not
dropped) */
bool locked; /*!< whether these recs locked */
} matched_rec_t;
/* In memory representation of a minimum bounding rectangle */
typedef struct rtr_mbr {
double xmin; /*!< minimum on x */
double xmax; /*!< maximum on x */
double ymin; /*!< minimum on y */
double ymax; /*!< maximum on y */
} rtr_mbr_t;
/* Maximum index level for R-Tree, this is consistent with BTR_MAX_LEVELS */
#define RTR_MAX_LEVELS 100
/* Number of pages we latch at leaf level when there is possible Tree
modification (split, shrink), we always latch left, current
and right pages */
#define RTR_LEAF_LATCH_NUM 3
/** Vectors holding the matching internal pages/nodes and leaf records */
typedef struct rtr_info{
rtr_node_path_t*path; /*!< vector holding matching pages */
rtr_node_path_t*parent_path;
/*!< vector holding parent pages during
search */
matched_rec_t* matches;/*!< struct holding matching leaf records */
mysql_mutex_t rtr_path_mutex;
/*!< mutex protect the "path" vector */
rtr_mbr_t mbr; /*!< the search MBR */
que_thr_t* thr; /*!< the search thread */
btr_cur_t* cursor; /*!< cursor used for search */
dict_index_t* index; /*!< index it is searching */
bool need_prdt_lock;
/*!< whether we will need predicate lock
the tree */
bool need_page_lock;
/*!< whether we will need predicate page lock
the tree */
bool allocated;/*!< whether this structure is allocate or
on stack */
bool mbr_adj;/*!< whether mbr will need to be enlarged
for an insertion operation */
bool fd_del; /*!< found deleted row */
const dtuple_t* search_tuple;
/*!< search tuple being used */
page_cur_mode_t search_mode;
/*!< current search mode */
} rtr_info_t;
/* Tracking structure for all ongoing search for an index */
struct rtr_info_track_t {
/** Active search info */
std::forward_list<rtr_info_t*, ut_allocator<rtr_info_t*> > rtr_active;
mysql_mutex_t rtr_active_mutex;
/*!< mutex to protect
rtr_active */
};
/* This is to record the record movement between pages. Used for corresponding
lock movement */
typedef struct rtr_rec_move {
rec_t* old_rec; /*!< record being moved in old page */
rec_t* new_rec; /*!< new record location */
bool moved; /*!< whether lock are moved too */
} rtr_rec_move_t;
#endif /*!< gis0rtree.h */
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