1 /***************************************************************************** 2 3 Copyright (c) 1994, 2016, Oracle and/or its affiliates. All Rights Reserved. 4 Copyright (c) 2018, 2020, MariaDB Corporation. 5 6 This program is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free Software 8 Foundation; version 2 of the License. 9 10 This program is distributed in the hope that it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 12 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License along with 15 this program; if not, write to the Free Software Foundation, Inc., 16 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA 17 18 *****************************************************************************/ 19 20 /**************************************************//** 21 @file include/ha0ha.h 22 The hash table interface for the adaptive hash index 23 24 Created 8/18/1994 Heikki Tuuri 25 *******************************************************/ 26 27 #ifndef ha0ha_h 28 #define ha0ha_h 29 30 #include "hash0hash.h" 31 #include "page0types.h" 32 #include "buf0types.h" 33 #include "rem0types.h" 34 35 #ifdef BTR_CUR_HASH_ADAPT 36 /*************************************************************//** 37 Looks for an element in a hash table. 38 @return pointer to the data of the first hash table node in chain 39 having the fold number, NULL if not found */ 40 UNIV_INLINE 41 const rec_t* 42 ha_search_and_get_data( 43 /*===================*/ 44 hash_table_t* table, /*!< in: hash table */ 45 ulint fold); /*!< in: folded value of the searched data */ 46 47 /** The hash table external chain node */ 48 struct ha_node_t { 49 ulint fold; /*!< fold value for the data */ 50 ha_node_t* next; /*!< next chain node or NULL if none */ 51 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG 52 buf_block_t* block; /*!< buffer block containing the data, or NULL */ 53 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ 54 const rec_t* data; /*!< pointer to the data */ 55 }; 56 57 #include "ha0ha.inl" 58 #endif /* BTR_CUR_HASH_ADAPT */ 59 60 #endif 61