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132 lines
3.8 KiB
132 lines
3.8 KiB
5 months ago
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#ifndef FT_GLOBAL_INCLUDED
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#define FT_GLOBAL_INCLUDED
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/* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/* Written by Sergei A. Golubchik, who has a shared copyright to this code */
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/**
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@file include/ft_global.h
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Some definitions for full-text indices.
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*/
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/* #include "myisam.h" */
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#include <sys/types.h>
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#include "m_ctype.h"
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#include "my_base.h"
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#include "my_inttypes.h"
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#define HA_FT_MAXBYTELEN 336
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#define HA_FT_MAXCHARLEN (HA_FT_MAXBYTELEN / 4)
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#define DEFAULT_FTB_SYNTAX "+ -><()~*:\"\"&|"
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struct FT_INFO;
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struct _ft_vft {
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int (*read_next)(FT_INFO *, char *);
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float (*find_relevance)(FT_INFO *, uchar *, uint);
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void (*close_search)(FT_INFO *);
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float (*get_relevance)(FT_INFO *);
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void (*reinit_search)(FT_INFO *);
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};
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struct FT_INFO_EXT;
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struct _ft_vft_ext {
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uint (*get_version)(); // Extended API version
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ulonglong (*get_flags)();
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ulonglong (*get_docid)(FT_INFO_EXT *);
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ulonglong (*count_matches)(FT_INFO_EXT *);
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};
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/* Flags for extended FT API */
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#define FTS_ORDERED_RESULT (1LL << 1)
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#define FTS_DOCID_IN_RESULT (1LL << 2)
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#define FTS_DOC_ID_COL_NAME "FTS_DOC_ID"
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#define FTS_NGRAM_PARSER_NAME "ngram"
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struct FT_INFO {
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struct _ft_vft *please; /* INTERCAL style :-) */
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};
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#ifndef FT_CORE
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struct FT_INFO_EXT {
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struct _ft_vft *please; /* INTERCAL style :-) */
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struct _ft_vft_ext *could_you;
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};
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#endif
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extern const char *ft_stopword_file;
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extern const char *ft_precompiled_stopwords[];
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extern ulong ft_min_word_len;
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extern ulong ft_max_word_len;
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extern ulong ft_query_expansion_limit;
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extern const char *ft_boolean_syntax;
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extern struct st_mysql_ftparser ft_default_parser;
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int ft_init_stopwords(void);
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void ft_free_stopwords(void);
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/**
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Operation types, used in FT_HINTS.
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*/
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enum ft_operation {
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FT_OP_UNDEFINED, /** Operation undefined, use of hints is impossible */
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FT_OP_NO, /** No operation, single MATCH function */
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FT_OP_GT, /** 'Greater than' operation */
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FT_OP_GE /** 'Greater than or equal to' operation */
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};
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#define FT_NL 0 /** Normal mode */
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#define FT_BOOL 1 /** Boolean mode */
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#define FT_SORTED 2 /** perform internal sorting by rank */
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#define FT_EXPAND 4 /** query expansion */
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#define FT_NO_RANKING 8 /** skip rank calculation */
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/**
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Info about FULLTEXT index hints,
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passed to the storage engine.
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*/
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struct ft_hints {
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/** FULLTEXT flags, see FT_NL, etc */
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uint flags;
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/** Operation type */
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enum ft_operation op_type;
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/** Operation value */
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double op_value;
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/** LIMIT value, HA_POS_ERROR if not set */
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ha_rows limit;
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};
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FT_INFO *ft_init_search(uint, void *, uint, uchar *, uint, const CHARSET_INFO *,
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uchar *);
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bool ft_boolean_check_syntax_string(const uchar *);
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#endif /* FT_GLOBAL_INCLUDED */
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