storage/myisam/ft_static.cc

/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   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, version 2.0, 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 St, Fifth Floor, Boston, MA 02110-1301  USA */

/* Written by Sergei A. Golubchik, who has a shared copyright to this code */

#include <stddef.h>
#include <sys/types.h>

#include "my_inttypes.h"
#include "storage/myisam/ftdefs.h"

ulong ft_min_word_len = 4;
ulong ft_max_word_len = HA_FT_MAXCHARLEN;
ulong ft_query_expansion_limit = 5;
const char *ft_boolean_syntax = DEFAULT_FTB_SYNTAX;

const HA_KEYSEG ft_keysegs[FT_SEGS] = {
    {
        nullptr,                          /* charset  */
        HA_FT_WLEN,                       /* start */
        0,                                /* null_pos */
        0,                                /* Bit pos */
        HA_VAR_LENGTH_PART | HA_PACK_KEY, /* flag */
        HA_FT_MAXBYTELEN,                 /* length */
        63,                               /* language (will be overwritten) */
        HA_KEYTYPE_VARTEXT2,              /* type */
        0,                                /* null_bit */
        2, 0, 0                           /* bit_start, bit_end, bit_length */
    },
    {/*
         Note, this (and the last HA_KEYTYPE_END) segment should NOT
         be packed in any way, otherwise w_search() won't be able to
         update key entry 'in vivo'
       */
     nullptr, 0, 0, 0, HA_NO_SORT, HA_FT_WLEN, 63, HA_FT_WTYPE, 0, 0, 0, 0}};

const struct _ft_vft _ft_vft_nlq = {ft_nlq_read_next, ft_nlq_find_relevance,
                                    ft_nlq_close_search, ft_nlq_get_relevance,
                                    ft_nlq_reinit_search};
const struct _ft_vft _ft_vft_boolean = {
    ft_boolean_read_next, ft_boolean_find_relevance, ft_boolean_close_search,
    ft_boolean_get_relevance, ft_boolean_reinit_search};

FT_INFO *ft_init_search(uint flags, void *info, uint keynr, uchar *query,
                        uint query_len, const CHARSET_INFO *cs, uchar *record) {
  FT_INFO *res;
  if (flags & FT_BOOL)
    res = ft_init_boolean_search((MI_INFO *)info, keynr, query, query_len, cs);
  else
    res = ft_init_nlq_search((MI_INFO *)info, keynr, query, query_len, flags,
                             record);
  return res;
}

const char *ft_stopword_file = nullptr;
const char *ft_precompiled_stopwords[] = {

    /* This particular stopword list was taken from SMART distribution
       ftp://ftp.cs.cornell.edu/pub/smart/smart.11.0.tar.Z
       it was slightly modified to my taste, though
     */

    "a's",
    "able",
    "about",
    "above",
    "according",
    "accordingly",
    "across",
    "actually",
    "after",
    "afterwards",
    "again",
    "against",
    "ain't",
    "all",
    "allow",
    "allows",
    "almost",
    "alone",
    "along",
    "already",
    "also",
    "although",
    "always",
    "am",
    "among",
    "amongst",
    "an",
    "and",
    "another",
    "any",
    "anybody",
    "anyhow",
    "anyone",
    "anything",
    "anyway",
    "anyways",
    "anywhere",
    "apart",
    "appear",
    "appreciate",
    "appropriate",
    "are",
    "aren't",
    "around",
    "as",
    "aside",
    "ask",
    "asking",
    "associated",
    "at",
    "available",
    "away",
    "awfully",
    "be",
    "became",
    "because",
    "become",
    "becomes",
    "becoming",
    "been",
    "before",
    "beforehand",
    "behind",
    "being",
    "believe",
    "below",
    "beside",
    "besides",
    "best",
    "better",
    "between",
    "beyond",
    "both",
    "brief",
    "but",
    "by",
    "c'mon",
    "c's",
    "came",
    "can",
    "can't",
    "cannot",
    "cant",
    "cause",
    "causes",
    "certain",
    "certainly",
    "changes",
    "clearly",
    "co",
    "com",
    "come",
    "comes",
    "concerning",
    "consequently",
    "consider",
    "considering",
    "contain",
    "containing",
    "contains",
    "corresponding",
    "could",
    "couldn't",
    "course",
    "currently",
    "definitely",
    "described",
    "despite",
    "did",
    "didn't",
    "different",
    "do",
    "does",
    "doesn't",
    "doing",
    "don't",
    "done",
    "down",
    "downwards",
    "during",
    "each",
    "edu",
    "eg",
    "eight",
    "either",
    "else",
    "elsewhere",
    "enough",
    "entirely",
    "especially",
    "et",
    "etc",
    "even",
    "ever",
    "every",
    "everybody",
    "everyone",
    "everything",
    "everywhere",
    "ex",
    "exactly",
    "example",
    "except",
    "far",
    "few",
    "fifth",
    "first",
    "five",
    "followed",
    "following",
    "follows",
    "for",
    "former",
    "formerly",
    "forth",
    "four",
    "from",
    "further",
    "furthermore",
    "get",
    "gets",
    "getting",
    "given",
    "gives",
    "go",
    "goes",
    "going",
    "gone",
    "got",
    "gotten",
    "greetings",
    "had",
    "hadn't",
    "happens",
    "hardly",
    "has",
    "hasn't",
    "have",
    "haven't",
    "having",
    "he",
    "he's",
    "hello",
    "help",
    "hence",
    "her",
    "here",
    "here's",
    "hereafter",
    "hereby",
    "herein",
    "hereupon",
    "hers",
    "herself",
    "hi",
    "him",
    "himself",
    "his",
    "hither",
    "hopefully",
    "how",
    "howbeit",
    "however",
    "i'd",
    "i'll",
    "i'm",
    "i've",
    "ie",
    "if",
    "ignored",
    "immediate",
    "in",
    "inasmuch",
    "inc",
    "indeed",
    "indicate",
    "indicated",
    "indicates",
    "inner",
    "insofar",
    "instead",
    "into",
    "inward",
    "is",
    "isn't",
    "it",
    "it'd",
    "it'll",
    "it's",
    "its",
    "itself",
    "just",
    "keep",
    "keeps",
    "kept",
    "know",
    "knows",
    "known",
    "last",
    "lately",
    "later",
    "latter",
    "latterly",
    "least",
    "less",
    "lest",
    "let",
    "let's",
    "like",
    "liked",
    "likely",
    "little",
    "look",
    "looking",
    "looks",
    "ltd",
    "mainly",
    "many",
    "may",
    "maybe",
    "me",
    "mean",
    "meanwhile",
    "merely",
    "might",
    "more",
    "moreover",
    "most",
    "mostly",
    "much",
    "must",
    "my",
    "myself",
    "name",
    "namely",
    "nd",
    "near",
    "nearly",
    "necessary",
    "need",
    "needs",
    "neither",
    "never",
    "nevertheless",
    "new",
    "next",
    "nine",
    "no",
    "nobody",
    "non",
    "none",
    "noone",
    "nor",
    "normally",
    "not",
    "nothing",
    "novel",
    "now",
    "nowhere",
    "obviously",
    "of",
    "off",
    "often",
    "oh",
    "ok",
    "okay",
    "old",
    "on",
    "once",
    "one",
    "ones",
    "only",
    "onto",
    "or",
    "other",
    "others",
    "otherwise",
    "ought",
    "our",
    "ours",
    "ourselves",
    "out",
    "outside",
    "over",
    "overall",
    "own",
    "particular",
    "particularly",
    "per",
    "perhaps",
    "placed",
    "please",
    "plus",
    "possible",
    "presumably",
    "probably",
    "provides",
    "que",
    "quite",
    "qv",
    "rather",
    "rd",
    "re",
    "really",
    "reasonably",
    "regarding",
    "regardless",
    "regards",
    "relatively",
    "respectively",
    "right",
    "said",
    "same",
    "saw",
    "say",
    "saying",
    "says",
    "second",
    "secondly",
    "see",
    "seeing",
    "seem",
    "seemed",
    "seeming",
    "seems",
    "seen",
    "self",
    "selves",
    "sensible",
    "sent",
    "serious",
    "seriously",
    "seven",
    "several",
    "shall",
    "she",
    "should",
    "shouldn't",
    "since",
    "six",
    "so",
    "some",
    "somebody",
    "somehow",
    "someone",
    "something",
    "sometime",
    "sometimes",
    "somewhat",
    "somewhere",
    "soon",
    "sorry",
    "specified",
    "specify",
    "specifying",
    "still",
    "sub",
    "such",
    "sup",
    "sure",
    "t's",
    "take",
    "taken",
    "tell",
    "tends",
    "th",
    "than",
    "thank",
    "thanks",
    "thanx",
    "that",
    "that's",
    "thats",
    "the",
    "their",
    "theirs",
    "them",
    "themselves",
    "then",
    "thence",
    "there",
    "there's",
    "thereafter",
    "thereby",
    "therefore",
    "therein",
    "theres",
    "thereupon",
    "these",
    "they",
    "they'd",
    "they'll",
    "they're",
    "they've",
    "think",
    "third",
    "this",
    "thorough",
    "thoroughly",
    "those",
    "though",
    "three",
    "through",
    "throughout",
    "thru",
    "thus",
    "to",
    "together",
    "too",
    "took",
    "toward",
    "towards",
    "tried",
    "tries",
    "truly",
    "try",
    "trying",
    "twice",
    "two",
    "un",
    "under",
    "unfortunately",
    "unless",
    "unlikely",
    "until",
    "unto",
    "up",
    "upon",
    "us",
    "use",
    "used",
    "useful",
    "uses",
    "using",
    "usually",
    "value",
    "various",
    "very",
    "via",
    "viz",
    "vs",
    "want",
    "wants",
    "was",
    "wasn't",
    "way",
    "we",
    "we'd",
    "we'll",
    "we're",
    "we've",
    "welcome",
    "well",
    "went",
    "were",
    "weren't",
    "what",
    "what's",
    "whatever",
    "when",
    "whence",
    "whenever",
    "where",
    "where's",
    "whereafter",
    "whereas",
    "whereby",
    "wherein",
    "whereupon",
    "wherever",
    "whether",
    "which",
    "while",
    "whither",
    "who",
    "who's",
    "whoever",
    "whole",
    "whom",
    "whose",
    "why",
    "will",
    "willing",
    "wish",
    "with",
    "within",
    "without",
    "won't",
    "wonder",
    "would",
    "wouldn't",
    "yes",
    "yet",
    "you",
    "you'd",
    "you'll",
    "you're",
    "you've",
    "your",
    "yours",
    "yourself",
    "yourselves",
    "zero",
    nullptr};

static int ft_default_parser_parse(MYSQL_FTPARSER_PARAM *param) {
  return param->mysql_parse(param, param->doc, param->length);
}

struct st_mysql_ftparser ft_default_parser = {MYSQL_FTPARSER_INTERFACE_VERSION,
                                              ft_default_parser_parse, nullptr,
                                              nullptr};