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|
/*****************************************************************************
Copyright (c) 2011, 2018, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2016, 2017, 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, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/******************************************************************//**
@file include/fts0fts.h
Full text search header file
Created 2011/09/02 Sunny Bains
***********************************************************************/
#ifndef fts0fts_h
#define fts0fts_h
#include "univ.i"
#include "data0type.h"
#include "data0types.h"
#include "dict0types.h"
#include "hash0hash.h"
#include "mem0mem.h"
#include "rem0types.h"
#include "row0types.h"
#include "trx0types.h"
#include "ut0vec.h"
#include "ut0rbt.h"
#include "ut0wqueue.h"
#include "que0types.h"
#include "ft_global.h"
/** "NULL" value of a document id. */
#define FTS_NULL_DOC_ID 0
/** FTS hidden column that is used to map to and from the row */
#define FTS_DOC_ID_COL_NAME "FTS_DOC_ID"
/** The name of the index created by FTS */
#define FTS_DOC_ID_INDEX_NAME "FTS_DOC_ID_INDEX"
#define FTS_DOC_ID_INDEX_NAME_LEN 16
/** Doc ID is a 8 byte value */
#define FTS_DOC_ID_LEN 8
/** The number of fields to sort when we build FT index with
FIC. Three fields are sort: (word, doc_id, position) */
#define FTS_NUM_FIELDS_SORT 3
/** Maximum number of rows in a table, smaller than which, we will
optimize using a 4 byte Doc ID for FIC merge sort to reduce sort size */
#define MAX_DOC_ID_OPT_VAL 1073741824
/** Document id type. */
typedef ib_uint64_t doc_id_t;
/** doc_id_t printf format */
#define FTS_DOC_ID_FORMAT IB_ID_FMT
/** Convert document id to the InnoDB (BIG ENDIAN) storage format. */
#define fts_write_doc_id(d, s) mach_write_to_8(d, s)
/** Read a document id to internal format. */
#define fts_read_doc_id(s) mach_read_from_8(s)
/** Bind the doc id to a variable */
#define fts_bind_doc_id(i, n, v) pars_info_bind_int8_literal(i, n, v)
/** Defines for FTS query mode, they have the same values as
those defined in mysql file ft_global.h */
#define FTS_NL 0
#define FTS_BOOL 1
#define FTS_SORTED 2
#define FTS_EXPAND 4
#define FTS_PROXIMITY 8
#define FTS_PHRASE 16
#define FTS_OPT_RANKING 32
#define FTS_INDEX_TABLE_IND_NAME "FTS_INDEX_TABLE_IND"
/** Threshold where our optimize thread automatically kicks in */
#define FTS_OPTIMIZE_THRESHOLD 10000000
/** Threshold to avoid exhausting of doc ids. Consecutive doc id difference
should not exceed FTS_DOC_ID_MAX_STEP */
#define FTS_DOC_ID_MAX_STEP 65535
/** Variable specifying the FTS parallel sort degree */
extern ulong fts_sort_pll_degree;
/** Variable specifying the number of word to optimize for each optimize table
call */
extern ulong fts_num_word_optimize;
/** Variable specifying whether we do additional FTS diagnostic printout
in the log */
extern char fts_enable_diag_print;
/** FTS rank type, which will be between 0 .. 1 inclusive */
typedef float fts_rank_t;
/** Type of a row during a transaction. FTS_NOTHING means the row can be
forgotten from the FTS system's POV, FTS_INVALID is an internal value used
to mark invalid states.
NOTE: Do not change the order or value of these, fts_trx_row_get_new_state
depends on them being exactly as they are. */
enum fts_row_state {
FTS_INSERT = 0,
FTS_MODIFY,
FTS_DELETE,
FTS_NOTHING,
FTS_INVALID
};
/** The FTS table types. */
enum fts_table_type_t {
FTS_INDEX_TABLE, /*!< FTS auxiliary table that is
specific to a particular FTS index
on a table */
FTS_COMMON_TABLE /*!< FTS auxiliary table that is common
for all FTS index on a table */
};
struct fts_doc_t;
struct fts_cache_t;
struct fts_token_t;
struct fts_doc_ids_t;
struct fts_index_cache_t;
/** Initialize the "fts_table" for internal query into FTS auxiliary
tables */
#define FTS_INIT_FTS_TABLE(fts_table, m_suffix, m_type, m_table)\
do { \
(fts_table)->suffix = m_suffix; \
(fts_table)->type = m_type; \
(fts_table)->table_id = m_table->id; \
(fts_table)->parent = m_table->name; \
(fts_table)->table = m_table; \
} while (0);
#define FTS_INIT_INDEX_TABLE(fts_table, m_suffix, m_type, m_index)\
do { \
(fts_table)->suffix = m_suffix; \
(fts_table)->type = m_type; \
(fts_table)->table_id = m_index->table->id; \
(fts_table)->parent = m_index->table->name; \
(fts_table)->table = m_index->table; \
(fts_table)->index_id = m_index->id; \
} while (0);
/** Information about changes in a single transaction affecting
the FTS system. */
struct fts_trx_t {
trx_t* trx; /*!< InnoDB transaction */
ib_vector_t* savepoints; /*!< Active savepoints, must have at
least one element, the implied
savepoint */
ib_vector_t* last_stmt; /*!< last_stmt */
mem_heap_t* heap; /*!< heap */
};
/** Information required for transaction savepoint handling. */
struct fts_savepoint_t {
char* name; /*!< First entry is always NULL, the
default instance. Otherwise the name
of the savepoint */
ib_rbt_t* tables; /*!< Modified FTS tables */
};
/** Information about changed rows in a transaction for a single table. */
struct fts_trx_table_t {
dict_table_t* table; /*!< table */
fts_trx_t* fts_trx; /*!< link to parent */
ib_rbt_t* rows; /*!< rows changed; indexed by doc-id,
cells are fts_trx_row_t* */
fts_doc_ids_t* added_doc_ids; /*!< list of added doc ids (NULL until
the first addition) */
/*!< for adding doc ids */
que_t* docs_added_graph;
};
/** Information about one changed row in a transaction. */
struct fts_trx_row_t {
doc_id_t doc_id; /*!< Id of the ins/upd/del document */
fts_row_state state; /*!< state of the row */
ib_vector_t* fts_indexes; /*!< The indexes that are affected */
};
/** List of document ids that were added during a transaction. This
list is passed on to a background 'Add' thread and OPTIMIZE, so it
needs its own memory heap. */
struct fts_doc_ids_t {
ib_vector_t* doc_ids; /*!< document ids (each element is
of type doc_id_t). */
ib_alloc_t* self_heap; /*!< Allocator used to create an
instance of this type and the
doc_ids vector */
};
// FIXME: Get rid of this if possible.
/** Since MySQL's character set support for Unicode is woefully inadequate
(it supports basic operations like isalpha etc. only for 8-bit characters),
we have to implement our own. We use UTF-16 without surrogate processing
as our in-memory format. This typedef is a single such character. */
typedef unsigned short ib_uc_t;
/** An UTF-16 ro UTF-8 string. */
struct fts_string_t {
byte* f_str; /*!< string, not necessary terminated in
any way */
ulint f_len; /*!< Length of the string in bytes */
ulint f_n_char; /*!< Number of characters */
};
/** Query ranked doc ids. */
struct fts_ranking_t {
doc_id_t doc_id; /*!< Document id */
fts_rank_t rank; /*!< Rank is between 0 .. 1 */
byte* words; /*!< this contains the words
that were queried
and found in this document */
ulint words_len; /*!< words len */
};
/** Query result. */
struct fts_result_t {
ib_rbt_node_t* current; /*!< Current element */
ib_rbt_t* rankings_by_id; /*!< RB tree of type fts_ranking_t
indexed by doc id */
ib_rbt_t* rankings_by_rank;/*!< RB tree of type fts_ranking_t
indexed by rank */
};
/** This is used to generate the FTS auxiliary table name, we need the
table id and the index id to generate the column specific FTS auxiliary
table name. */
struct fts_table_t {
const char* parent; /*!< Parent table name, this is
required only for the database
name */
fts_table_type_t
type; /*!< The auxiliary table type */
table_id_t table_id; /*!< The table id */
index_id_t index_id; /*!< The index id */
const char* suffix; /*!< The suffix of the fts auxiliary
table name, can be NULL, not used
everywhere (yet) */
const dict_table_t*
table; /*!< Parent table */
CHARSET_INFO* charset; /*!< charset info if it is for FTS
index auxiliary table */
};
enum fts_status {
BG_THREAD_STOP = 1, /*!< TRUE if the FTS background thread
has finished reading the ADDED table,
meaning more items can be added to
the table. */
BG_THREAD_READY = 2, /*!< TRUE if the FTS background thread
is ready */
ADD_THREAD_STARTED = 4, /*!< TRUE if the FTS add thread
has started */
ADDED_TABLE_SYNCED = 8, /*!< TRUE if the ADDED table record is
sync-ed after crash recovery */
TABLE_DICT_LOCKED = 16 /*!< Set if the table has
dict_sys->mutex */
};
typedef enum fts_status fts_status_t;
/** The state of the FTS sub system. */
struct fts_t {
/*!< mutex protecting bg_threads* and
fts_add_wq. */
ib_mutex_t bg_threads_mutex;
ulint bg_threads; /*!< number of background threads
accessing this table */
/*!< TRUE if background threads running
should stop themselves */
ulint fts_status; /*!< Status bit regarding fts
running state */
ib_wqueue_t* add_wq; /*!< Work queue for scheduling jobs
for the FTS 'Add' thread, or NULL
if the thread has not yet been
created. Each work item is a
fts_trx_doc_ids_t*. */
fts_cache_t* cache; /*!< FTS memory buffer for this table,
or NULL if the table has no FTS
index. */
ulint doc_col; /*!< FTS doc id hidden column number
in the CLUSTERED index. */
ib_vector_t* indexes; /*!< Vector of FTS indexes, this is
mainly for caching purposes. */
mem_heap_t* fts_heap; /*!< heap for fts_t allocation */
};
struct fts_stopword_t;
/** status bits for fts_stopword_t status field. */
#define STOPWORD_NOT_INIT 0x1
#define STOPWORD_OFF 0x2
#define STOPWORD_FROM_DEFAULT 0x4
#define STOPWORD_USER_TABLE 0x8
extern const char* fts_default_stopword[];
/** Variable specifying the maximum FTS cache size for each table */
extern ulong fts_max_cache_size;
/** Variable specifying the total memory allocated for FTS cache */
extern ulong fts_max_total_cache_size;
/** Variable specifying the FTS result cache limit for each query */
extern ulong fts_result_cache_limit;
/** Variable specifying the maximum FTS max token size */
extern ulong fts_max_token_size;
/** Variable specifying the minimum FTS max token size */
extern ulong fts_min_token_size;
/** Whether the total memory used for FTS cache is exhausted, and we will
need a sync to free some memory */
extern bool fts_need_sync;
/** Maximum possible Fulltext word length in bytes (assuming mbmaxlen=4) */
#define FTS_MAX_WORD_LEN (HA_FT_MAXCHARLEN * 4)
/** Maximum possible Fulltext word length (in characters) */
#define FTS_MAX_WORD_LEN_IN_CHAR HA_FT_MAXCHARLEN
/** Variable specifying the table that has Fulltext index to display its
content through information schema table */
extern char* fts_internal_tbl_name;
extern char* fts_internal_tbl_name2;
#define fts_que_graph_free(graph) \
do { \
mutex_enter(&dict_sys->mutex); \
que_graph_free(graph); \
mutex_exit(&dict_sys->mutex); \
} while (0)
/******************************************************************//**
Create a FTS cache. */
UNIV_INTERN
fts_cache_t*
fts_cache_create(
/*=============*/
dict_table_t* table); /*!< table owns the FTS cache */
/******************************************************************//**
Create a FTS index cache.
@return Index Cache */
UNIV_INTERN
fts_index_cache_t*
fts_cache_index_cache_create(
/*=========================*/
dict_table_t* table, /*!< in: table with FTS index */
dict_index_t* index); /*!< in: FTS index */
/******************************************************************//**
Get the next available document id. This function creates a new
transaction to generate the document id.
@return DB_SUCCESS if OK */
UNIV_INTERN
dberr_t
fts_get_next_doc_id(
/*================*/
const dict_table_t* table, /*!< in: table */
doc_id_t* doc_id) /*!< out: new document id */
MY_ATTRIBUTE((nonnull));
/*********************************************************************//**
Update the next and last Doc ID in the CONFIG table to be the input
"doc_id" value (+ 1). We would do so after each FTS index build or
table truncate */
UNIV_INTERN
void
fts_update_next_doc_id(
/*===================*/
trx_t* trx, /*!< in/out: transaction */
const dict_table_t* table, /*!< in: table */
const char* table_name, /*!< in: table name, or NULL */
doc_id_t doc_id) /*!< in: DOC ID to set */
MY_ATTRIBUTE((nonnull(2)));
/******************************************************************//**
Create a new fts_doc_ids_t.
@return new fts_doc_ids_t. */
UNIV_INTERN
fts_doc_ids_t*
fts_doc_ids_create(void);
/*=====================*/
/******************************************************************//**
Free a fts_doc_ids_t. */
UNIV_INTERN
void
fts_doc_ids_free(
/*=============*/
fts_doc_ids_t* doc_ids); /*!< in: doc_ids to free */
/******************************************************************//**
Notify the FTS system about an operation on an FTS-indexed table. */
UNIV_INTERN
void
fts_trx_add_op(
/*===========*/
trx_t* trx, /*!< in: InnoDB transaction */
dict_table_t* table, /*!< in: table */
doc_id_t doc_id, /*!< in: doc id */
fts_row_state state, /*!< in: state of the row */
ib_vector_t* fts_indexes) /*!< in: FTS indexes affected
(NULL=all) */
MY_ATTRIBUTE((nonnull(1,2)));
/******************************************************************//**
Free an FTS trx. */
UNIV_INTERN
void
fts_trx_free(
/*=========*/
fts_trx_t* fts_trx); /*!< in, own: FTS trx */
/******************************************************************//**
Creates the common ancillary tables needed for supporting an FTS index
on the given table. row_mysql_lock_data_dictionary must have been
called before this.
@return DB_SUCCESS or error code */
UNIV_INTERN
dberr_t
fts_create_common_tables(
/*=====================*/
trx_t* trx, /*!< in: transaction handle */
const dict_table_t*
table, /*!< in: table with one FTS
index */
const char* name, /*!< in: table name */
bool skip_doc_id_index) /*!< in: Skip index on doc id */
MY_ATTRIBUTE((nonnull, warn_unused_result));
/******************************************************************//**
Wrapper function of fts_create_index_tables_low(), create auxiliary
tables for an FTS index
@return DB_SUCCESS or error code */
UNIV_INTERN
dberr_t
fts_create_index_tables(
/*====================*/
trx_t* trx, /*!< in: transaction handle */
const dict_index_t* index) /*!< in: the FTS index
instance */
MY_ATTRIBUTE((nonnull, warn_unused_result));
/******************************************************************//**
Creates the column specific ancillary tables needed for supporting an
FTS index on the given table. row_mysql_lock_data_dictionary must have
been called before this.
@return DB_SUCCESS or error code */
UNIV_INTERN
dberr_t
fts_create_index_tables_low(
/*========================*/
trx_t* trx, /*!< in: transaction handle */
const dict_index_t*
index, /*!< in: the FTS index
instance */
const char* table_name, /*!< in: the table name */
table_id_t table_id) /*!< in: the table id */
MY_ATTRIBUTE((nonnull, warn_unused_result));
/******************************************************************//**
Add the FTS document id hidden column. */
UNIV_INTERN
void
fts_add_doc_id_column(
/*==================*/
dict_table_t* table, /*!< in/out: Table with FTS index */
mem_heap_t* heap) /*!< in: temporary memory heap, or NULL */
MY_ATTRIBUTE((nonnull(1)));
/*********************************************************************//**
Drops the ancillary tables needed for supporting an FTS index on the
given table. row_mysql_lock_data_dictionary must have been called before
this.
@return DB_SUCCESS or error code */
UNIV_INTERN
dberr_t
fts_drop_tables(
/*============*/
trx_t* trx, /*!< in: transaction */
dict_table_t* table) /*!< in: table has the FTS
index */
MY_ATTRIBUTE((nonnull));
/******************************************************************//**
The given transaction is about to be committed; do whatever is necessary
from the FTS system's POV.
@return DB_SUCCESS or error code */
UNIV_INTERN
dberr_t
fts_commit(
/*=======*/
trx_t* trx) /*!< in: transaction */
MY_ATTRIBUTE((nonnull, warn_unused_result));
/*******************************************************************//**
FTS Query entry point.
@return DB_SUCCESS if successful otherwise error code */
UNIV_INTERN
dberr_t
fts_query(
/*======*/
trx_t* trx, /*!< in: transaction */
dict_index_t* index, /*!< in: FTS index to search */
uint flags, /*!< in: FTS search mode */
const byte* query, /*!< in: FTS query */
ulint query_len, /*!< in: FTS query string len
in bytes */
fts_result_t** result) /*!< out: query result, to be
freed by the caller.*/
MY_ATTRIBUTE((nonnull, warn_unused_result));
/******************************************************************//**
Retrieve the FTS Relevance Ranking result for doc with doc_id
@return the relevance ranking value. */
UNIV_INTERN
float
fts_retrieve_ranking(
/*=================*/
fts_result_t* result, /*!< in: FTS result structure */
doc_id_t doc_id); /*!< in: the interested document
doc_id */
/******************************************************************//**
FTS Query sort result, returned by fts_query() on fts_ranking_t::rank. */
UNIV_INTERN
void
fts_query_sort_result_on_rank(
/*==========================*/
fts_result_t* result); /*!< out: result instance
to sort.*/
/******************************************************************//**
FTS Query free result, returned by fts_query(). */
UNIV_INTERN
void
fts_query_free_result(
/*==================*/
fts_result_t* result); /*!< in: result instance
to free.*/
/******************************************************************//**
Extract the doc id from the FTS hidden column. */
UNIV_INTERN
doc_id_t
fts_get_doc_id_from_row(
/*====================*/
dict_table_t* table, /*!< in: table */
dtuple_t* row); /*!< in: row whose FTS doc id we
want to extract.*/
/******************************************************************//**
Extract the doc id from the FTS hidden column. */
UNIV_INTERN
doc_id_t
fts_get_doc_id_from_rec(
/*====================*/
dict_table_t* table, /*!< in: table */
const rec_t* rec, /*!< in: rec */
mem_heap_t* heap); /*!< in: heap */
/******************************************************************//**
Update the query graph with a new document id.
@return Doc ID used */
UNIV_INTERN
doc_id_t
fts_update_doc_id(
/*==============*/
dict_table_t* table, /*!< in: table */
upd_field_t* ufield, /*!< out: update node */
doc_id_t* next_doc_id); /*!< out: buffer for writing */
/******************************************************************//**
FTS initialize. */
UNIV_INTERN
void
fts_startup(void);
/*==============*/
/******************************************************************//**
Signal FTS threads to initiate shutdown. */
UNIV_INTERN
void
fts_start_shutdown(
/*===============*/
dict_table_t* table, /*!< in: table with FTS
indexes */
fts_t* fts); /*!< in: fts instance to
shutdown */
/******************************************************************//**
Wait for FTS threads to shutdown. */
UNIV_INTERN
void
fts_shutdown(
/*=========*/
dict_table_t* table, /*!< in: table with FTS
indexes */
fts_t* fts); /*!< in: fts instance to
shutdown */
/******************************************************************//**
Create an instance of fts_t.
@return instance of fts_t */
UNIV_INTERN
fts_t*
fts_create(
/*=======*/
dict_table_t* table); /*!< out: table with FTS
indexes */
/**********************************************************************//**
Free the FTS resources. */
UNIV_INTERN
void
fts_free(
/*=====*/
dict_table_t* table); /*!< in/out: table with
FTS indexes */
/*********************************************************************//**
Run OPTIMIZE on the given table.
@return DB_SUCCESS if all OK */
UNIV_INTERN
dberr_t
fts_optimize_table(
/*===============*/
dict_table_t* table) /*!< in: table to optimiza */
MY_ATTRIBUTE((nonnull));
/**********************************************************************//**
Startup the optimize thread and create the work queue. */
UNIV_INTERN
void
fts_optimize_init(void);
/*====================*/
/**********************************************************************//**
Check whether the work queue is initialized.
@return TRUE if optimze queue is initialized. */
UNIV_INTERN
ibool
fts_optimize_is_init(void);
/*======================*/
/****************************************************************//**
Drops index ancillary tables for a FTS index
@return DB_SUCCESS or error code */
UNIV_INTERN
dberr_t
fts_drop_index_tables(
/*==================*/
trx_t* trx, /*!< in: transaction */
dict_index_t* index) /*!< in: Index to drop */
MY_ATTRIBUTE((nonnull, warn_unused_result));
/** Add the table to add to the OPTIMIZER's list.
@param[in] table table to add */
void
fts_optimize_add_table(
dict_table_t* table);
/******************************************************************//**
Remove the table from the OPTIMIZER's list. We do wait for
acknowledgement from the consumer of the message. */
UNIV_INTERN
void
fts_optimize_remove_table(
/*======================*/
dict_table_t* table); /*!< in: table to remove */
/** Send sync fts cache for the table.
@param[in] table table to sync */
UNIV_INTERN
void
fts_optimize_request_sync_table(
dict_table_t* table);
/**********************************************************************//**
Signal the optimize thread to prepare for shutdown. */
UNIV_INTERN
void
fts_optimize_start_shutdown(void);
/*==============================*/
/**********************************************************************//**
Inform optimize to clean up. */
UNIV_INTERN
void
fts_optimize_end(void);
/*===================*/
/**********************************************************************//**
Take a FTS savepoint. */
UNIV_INTERN
void
fts_savepoint_take(
/*===============*/
trx_t* trx, /*!< in: transaction */
fts_trx_t* fts_trx, /*!< in: fts transaction */
const char* name) /*!< in: savepoint name */
MY_ATTRIBUTE((nonnull));
/**********************************************************************//**
Refresh last statement savepoint. */
UNIV_INTERN
void
fts_savepoint_laststmt_refresh(
/*===========================*/
trx_t* trx) /*!< in: transaction */
MY_ATTRIBUTE((nonnull));
/**********************************************************************//**
Release the savepoint data identified by name. */
UNIV_INTERN
void
fts_savepoint_release(
/*==================*/
trx_t* trx, /*!< in: transaction */
const char* name); /*!< in: savepoint name */
/**********************************************************************//**
Free the FTS cache. */
UNIV_INTERN
void
fts_cache_destroy(
/*==============*/
fts_cache_t* cache); /*!< in: cache*/
/** Clear cache.
@param[in,out] cache fts cache */
UNIV_INTERN
void
fts_cache_clear(
fts_cache_t* cache);
/*********************************************************************//**
Initialize things in cache. */
UNIV_INTERN
void
fts_cache_init(
/*===========*/
fts_cache_t* cache); /*!< in: cache */
/*********************************************************************//**
Rollback to and including savepoint indentified by name. */
UNIV_INTERN
void
fts_savepoint_rollback(
/*===================*/
trx_t* trx, /*!< in: transaction */
const char* name); /*!< in: savepoint name */
/*********************************************************************//**
Rollback to and including savepoint indentified by name. */
UNIV_INTERN
void
fts_savepoint_rollback_last_stmt(
/*=============================*/
trx_t* trx); /*!< in: transaction */
/***********************************************************************//**
Drop all orphaned FTS auxiliary tables, those that don't have a parent
table or FTS index defined on them. */
UNIV_INTERN
void
fts_drop_orphaned_tables(void);
/*==========================*/
/* Get parent table name if it's a fts aux table
@param[in] aux_table_name aux table name
@param[in] aux_table_len aux table length
@return parent table name, or NULL */
char*
fts_get_parent_table_name(
const char* aux_table_name,
ulint aux_table_len);
/******************************************************************//**
Since we do a horizontal split on the index table, we need to drop
all the split tables.
@return DB_SUCCESS or error code */
UNIV_INTERN
dberr_t
fts_drop_index_split_tables(
/*========================*/
trx_t* trx, /*!< in: transaction */
dict_index_t* index) /*!< in: fts instance */
MY_ATTRIBUTE((nonnull, warn_unused_result));
/** Run SYNC on the table, i.e., write out data from the cache to the
FTS auxiliary INDEX table and clear the cache at the end.
@param[in,out] table fts table
@param[in] unlock_cache whether unlock cache when write node
@param[in] wait whether wait for existing sync to finish
@param[in] has_dict whether has dict operation lock
@return DB_SUCCESS on success, error code on failure. */
UNIV_INTERN
dberr_t
fts_sync_table(
dict_table_t* table,
bool unlock_cache,
bool wait,
bool has_dict);
/****************************************************************//**
Free the query graph but check whether dict_sys->mutex is already
held */
UNIV_INTERN
void
fts_que_graph_free_check_lock(
/*==========================*/
fts_table_t* fts_table, /*!< in: FTS table */
const fts_index_cache_t*index_cache, /*!< in: FTS index cache */
que_t* graph); /*!< in: query graph */
/****************************************************************//**
Create an FTS index cache. */
UNIV_INTERN
CHARSET_INFO*
fts_index_get_charset(
/*==================*/
dict_index_t* index); /*!< in: FTS index */
/*********************************************************************//**
Get the initial Doc ID by consulting the CONFIG table
@return initial Doc ID */
UNIV_INTERN
doc_id_t
fts_init_doc_id(
/*============*/
const dict_table_t* table); /*!< in: table */
/******************************************************************//**
compare two character string according to their charset. */
extern
int
innobase_fts_text_cmp(
/*==================*/
const void* cs, /*!< in: Character set */
const void* p1, /*!< in: key */
const void* p2); /*!< in: node */
/******************************************************************//**
Makes all characters in a string lower case. */
extern
size_t
innobase_fts_casedn_str(
/*====================*/
CHARSET_INFO* cs, /*!< in: Character set */
char* src, /*!< in: string to put in
lower case */
size_t src_len, /*!< in: input string length */
char* dst, /*!< in: buffer for result
string */
size_t dst_len); /*!< in: buffer size */
/******************************************************************//**
compare two character string according to their charset. */
extern
int
innobase_fts_text_cmp_prefix(
/*=========================*/
const void* cs, /*!< in: Character set */
const void* p1, /*!< in: key */
const void* p2); /*!< in: node */
/*************************************************************//**
Get the next token from the given string and store it in *token. */
extern
ulint
innobase_mysql_fts_get_token(
/*=========================*/
CHARSET_INFO* charset, /*!< in: Character set */
const byte* start, /*!< in: start of text */
const byte* end, /*!< in: one character past
end of text */
fts_string_t* token, /*!< out: token's text */
ulint* offset); /*!< out: offset to token,
measured as characters from
'start' */
/*********************************************************************//**
Fetch COUNT(*) from specified table.
@return the number of rows in the table */
UNIV_INTERN
ulint
fts_get_rows_count(
/*===============*/
fts_table_t* fts_table); /*!< in: fts table to read */
/*************************************************************//**
Get maximum Doc ID in a table if index "FTS_DOC_ID_INDEX" exists
@return max Doc ID or 0 if index "FTS_DOC_ID_INDEX" does not exist */
UNIV_INTERN
doc_id_t
fts_get_max_doc_id(
/*===============*/
dict_table_t* table); /*!< in: user table */
/******************************************************************//**
Check whether user supplied stopword table exists and is of
the right format.
@return the stopword column charset if qualifies */
UNIV_INTERN
CHARSET_INFO*
fts_valid_stopword_table(
/*=====================*/
const char* stopword_table_name); /*!< in: Stopword table
name */
/****************************************************************//**
This function loads specified stopword into FTS cache
@return TRUE if success */
UNIV_INTERN
ibool
fts_load_stopword(
/*==============*/
const dict_table_t*
table, /*!< in: Table with FTS */
trx_t* trx, /*!< in: Transaction */
const char* global_stopword_table, /*!< in: Global stopword table
name */
const char* session_stopword_table, /*!< in: Session stopword table
name */
ibool stopword_is_on, /*!< in: Whether stopword
option is turned on/off */
ibool reload); /*!< in: Whether it is during
reload of FTS table */
/****************************************************************//**
Create the vector of fts_get_doc_t instances.
@return vector of fts_get_doc_t instances */
UNIV_INTERN
ib_vector_t*
fts_get_docs_create(
/*================*/
fts_cache_t* cache); /*!< in: fts cache */
/****************************************************************//**
Read the rows from the FTS index
@return DB_SUCCESS if OK */
UNIV_INTERN
dberr_t
fts_table_fetch_doc_ids(
/*====================*/
trx_t* trx, /*!< in: transaction */
fts_table_t* fts_table, /*!< in: aux table */
fts_doc_ids_t* doc_ids); /*!< in: For collecting
doc ids */
/****************************************************************//**
This function brings FTS index in sync when FTS index is first
used. There are documents that have not yet sync-ed to auxiliary
tables from last server abnormally shutdown, we will need to bring
such document into FTS cache before any further operations
@return TRUE if all OK */
UNIV_INTERN
ibool
fts_init_index(
/*===========*/
dict_table_t* table, /*!< in: Table with FTS */
ibool has_cache_lock); /*!< in: Whether we already
have cache lock */
/*******************************************************************//**
Add a newly create index in FTS cache */
UNIV_INTERN
void
fts_add_index(
/*==========*/
dict_index_t* index, /*!< FTS index to be added */
dict_table_t* table); /*!< table */
/*******************************************************************//**
Drop auxiliary tables related to an FTS index
@return DB_SUCCESS or error number */
UNIV_INTERN
dberr_t
fts_drop_index(
/*===========*/
dict_table_t* table, /*!< in: Table where indexes are dropped */
dict_index_t* index, /*!< in: Index to be dropped */
trx_t* trx) /*!< in: Transaction for the drop */
MY_ATTRIBUTE((nonnull));
/****************************************************************//**
Rename auxiliary tables for all fts index for a table
@return DB_SUCCESS or error code */
dberr_t
fts_rename_aux_tables(
/*==================*/
dict_table_t* table, /*!< in: user Table */
const char* new_name, /*!< in: new table name */
trx_t* trx); /*!< in: transaction */
/*******************************************************************//**
Check indexes in the fts->indexes is also present in index cache and
table->indexes list
@return TRUE if all indexes match */
UNIV_INTERN
ibool
fts_check_cached_index(
/*===================*/
dict_table_t* table); /*!< in: Table where indexes are dropped */
#endif /*!< fts0fts.h */
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