/***************************************************************************** Copyright (c) 1996, 2014, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2012, Facebook Inc. 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/dict0dict.h Data dictionary system Created 1/8/1996 Heikki Tuuri *******************************************************/ #ifndef dict0dict_h #define dict0dict_h #include "univ.i" #include "db0err.h" #include "dict0types.h" #include "dict0mem.h" #include "data0type.h" #include "data0data.h" #include "mem0mem.h" #include "rem0types.h" #include "ut0mem.h" #include "ut0lst.h" #include "hash0hash.h" #include "ut0rnd.h" #include "ut0byte.h" #include "trx0types.h" #include "row0types.h" extern bool innodb_table_stats_not_found; extern bool innodb_index_stats_not_found; #ifndef UNIV_HOTBACKUP # include "sync0sync.h" # include "sync0rw.h" /******************************************************************//** Makes all characters in a NUL-terminated UTF-8 string lower case. */ UNIV_INTERN void dict_casedn_str( /*============*/ char* a) /*!< in/out: string to put in lower case */ __attribute__((nonnull)); /********************************************************************//** Get the database name length in a table name. @return database name length */ UNIV_INTERN ulint dict_get_db_name_len( /*=================*/ const char* name) /*!< in: table name in the form dbname '/' tablename */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Open a table from its database and table name, this is currently used by foreign constraint parser to get the referenced table. @return complete table name with database and table name, allocated from heap memory passed in */ UNIV_INTERN char* dict_get_referenced_table( /*======================*/ const char* name, /*!< in: foreign key table name */ const char* database_name, /*!< in: table db name */ ulint database_name_len,/*!< in: db name length */ const char* table_name, /*!< in: table name */ ulint table_name_len, /*!< in: table name length */ dict_table_t** table, /*!< out: table object or NULL */ mem_heap_t* heap); /*!< in: heap memory */ /*********************************************************************//** Frees a foreign key struct. */ void dict_foreign_free( /*==============*/ dict_foreign_t* foreign); /*!< in, own: foreign key struct */ /*********************************************************************//** Finds the highest [number] for foreign key constraints of the table. Looks only at the >= 4.0.18-format id's, which are of the form databasename/tablename_ibfk_[number]. @return highest number, 0 if table has no new format foreign key constraints */ UNIV_INTERN ulint dict_table_get_highest_foreign_id( /*==============================*/ dict_table_t* table); /*!< in: table in the dictionary memory cache */ /********************************************************************//** Return the end of table name where we have removed dbname and '/'. @return table name */ UNIV_INTERN const char* dict_remove_db_name( /*================*/ const char* name) /*!< in: table name in the form dbname '/' tablename */ __attribute__((nonnull, warn_unused_result)); /** Operation to perform when opening a table */ enum dict_table_op_t { /** Expect the tablespace to exist. */ DICT_TABLE_OP_NORMAL = 0, /** Drop any orphan indexes after an aborted online index creation */ DICT_TABLE_OP_DROP_ORPHAN, /** Silently load the tablespace if it does not exist, and do not load the definitions of incomplete indexes. */ DICT_TABLE_OP_LOAD_TABLESPACE }; /**********************************************************************//** Returns a table object based on table id. @return table, NULL if does not exist */ UNIV_INTERN dict_table_t* dict_table_open_on_id( /*==================*/ table_id_t table_id, /*!< in: table id */ ibool dict_locked, /*!< in: TRUE=data dictionary locked */ dict_table_op_t table_op) /*!< in: operation to perform */ __attribute__((warn_unused_result)); /********************************************************************//** Decrements the count of open handles to a table. */ UNIV_INTERN void dict_table_close( /*=============*/ dict_table_t* table, /*!< in/out: table */ ibool dict_locked, /*!< in: TRUE=data dictionary locked */ ibool try_drop) /*!< in: TRUE=try to drop any orphan indexes after an aborted online index creation */ __attribute__((nonnull)); /**********************************************************************//** Inits the data dictionary module. */ UNIV_INTERN void dict_init(void); /*===========*/ /********************************************************************//** Gets the space id of every table of the data dictionary and makes a linear list and a hash table of them to the data dictionary cache. This function can be called at database startup if we did not need to do a crash recovery. In crash recovery we must scan the space id's from the .ibd files in MySQL database directories. */ UNIV_INTERN void dict_load_space_id_list(void); /*=========================*/ /*********************************************************************//** Gets the minimum number of bytes per character. @return minimum multi-byte char size, in bytes */ UNIV_INLINE ulint dict_col_get_mbminlen( /*==================*/ const dict_col_t* col) /*!< in: column */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Gets the maximum number of bytes per character. @return maximum multi-byte char size, in bytes */ UNIV_INLINE ulint dict_col_get_mbmaxlen( /*==================*/ const dict_col_t* col) /*!< in: column */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Sets the minimum and maximum number of bytes per character. */ UNIV_INLINE void dict_col_set_mbminmaxlen( /*=====================*/ dict_col_t* col, /*!< in/out: column */ ulint mbminlen, /*!< in: minimum multi-byte character size, in bytes */ ulint mbmaxlen) /*!< in: minimum multi-byte character size, in bytes */ __attribute__((nonnull)); /*********************************************************************//** Gets the column data type. */ UNIV_INLINE void dict_col_copy_type( /*===============*/ const dict_col_t* col, /*!< in: column */ dtype_t* type) /*!< out: data type */ __attribute__((nonnull)); /**********************************************************************//** Determine bytes of column prefix to be stored in the undo log. Please note if the table format is UNIV_FORMAT_A (< UNIV_FORMAT_B), no prefix needs to be stored in the undo log. @return bytes of column prefix to be stored in the undo log */ UNIV_INLINE ulint dict_max_field_len_store_undo( /*==========================*/ dict_table_t* table, /*!< in: table */ const dict_col_t* col) /*!< in: column which index prefix is based on */ __attribute__((nonnull, warn_unused_result)); #endif /* !UNIV_HOTBACKUP */ #ifdef UNIV_DEBUG /*********************************************************************//** Assert that a column and a data type match. @return TRUE */ UNIV_INLINE ibool dict_col_type_assert_equal( /*=======================*/ const dict_col_t* col, /*!< in: column */ const dtype_t* type) /*!< in: data type */ __attribute__((nonnull, warn_unused_result)); #endif /* UNIV_DEBUG */ #ifndef UNIV_HOTBACKUP /***********************************************************************//** Returns the minimum size of the column. @return minimum size */ UNIV_INLINE ulint dict_col_get_min_size( /*==================*/ const dict_col_t* col) /*!< in: column */ __attribute__((nonnull, warn_unused_result)); /***********************************************************************//** Returns the maximum size of the column. @return maximum size */ UNIV_INLINE ulint dict_col_get_max_size( /*==================*/ const dict_col_t* col) /*!< in: column */ __attribute__((nonnull, warn_unused_result)); /***********************************************************************//** Returns the size of a fixed size column, 0 if not a fixed size column. @return fixed size, or 0 */ UNIV_INLINE ulint dict_col_get_fixed_size( /*====================*/ const dict_col_t* col, /*!< in: column */ ulint comp) /*!< in: nonzero=ROW_FORMAT=COMPACT */ __attribute__((nonnull, warn_unused_result)); /***********************************************************************//** Returns the ROW_FORMAT=REDUNDANT stored SQL NULL size of a column. For fixed length types it is the fixed length of the type, otherwise 0. @return SQL null storage size in ROW_FORMAT=REDUNDANT */ UNIV_INLINE ulint dict_col_get_sql_null_size( /*=======================*/ const dict_col_t* col, /*!< in: column */ ulint comp) /*!< in: nonzero=ROW_FORMAT=COMPACT */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Gets the column number. @return col->ind, table column position (starting from 0) */ UNIV_INLINE ulint dict_col_get_no( /*============*/ const dict_col_t* col) /*!< in: column */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Gets the column position in the clustered index. */ UNIV_INLINE ulint dict_col_get_clust_pos( /*===================*/ const dict_col_t* col, /*!< in: table column */ const dict_index_t* clust_index) /*!< in: clustered index */ __attribute__((nonnull, warn_unused_result)); /****************************************************************//** If the given column name is reserved for InnoDB system columns, return TRUE. @return TRUE if name is reserved */ UNIV_INTERN ibool dict_col_name_is_reserved( /*======================*/ const char* name) /*!< in: column name */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Acquire the autoinc lock. */ UNIV_INTERN void dict_table_autoinc_lock( /*====================*/ dict_table_t* table) /*!< in/out: table */ __attribute__((nonnull)); /********************************************************************//** Unconditionally set the autoinc counter. */ UNIV_INTERN void dict_table_autoinc_initialize( /*==========================*/ dict_table_t* table, /*!< in/out: table */ ib_uint64_t value) /*!< in: next value to assign to a row */ __attribute__((nonnull)); /********************************************************************//** Reads the next autoinc value (== autoinc counter value), 0 if not yet initialized. @return value for a new row, or 0 */ UNIV_INTERN ib_uint64_t dict_table_autoinc_read( /*====================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Updates the autoinc counter if the value supplied is greater than the current value. */ UNIV_INTERN void dict_table_autoinc_update_if_greater( /*=================================*/ dict_table_t* table, /*!< in/out: table */ ib_uint64_t value) /*!< in: value which was assigned to a row */ __attribute__((nonnull)); /********************************************************************//** Release the autoinc lock. */ UNIV_INTERN void dict_table_autoinc_unlock( /*======================*/ dict_table_t* table) /*!< in/out: table */ __attribute__((nonnull)); #endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Adds system columns to a table object. */ UNIV_INTERN void dict_table_add_system_columns( /*==========================*/ dict_table_t* table, /*!< in/out: table */ mem_heap_t* heap) /*!< in: temporary heap */ __attribute__((nonnull)); #ifndef UNIV_HOTBACKUP /**********************************************************************//** Adds a table object to the dictionary cache. */ UNIV_INTERN void dict_table_add_to_cache( /*====================*/ dict_table_t* table, /*!< in: table */ ibool can_be_evicted, /*!< in: TRUE if can be evicted*/ mem_heap_t* heap) /*!< in: temporary heap */ __attribute__((nonnull)); /**********************************************************************//** Removes a table object from the dictionary cache. */ UNIV_INTERN void dict_table_remove_from_cache( /*=========================*/ dict_table_t* table) /*!< in, own: table */ __attribute__((nonnull)); /**********************************************************************//** Renames a table object. @return TRUE if success */ UNIV_INTERN dberr_t dict_table_rename_in_cache( /*=======================*/ dict_table_t* table, /*!< in/out: table */ const char* new_name, /*!< in: new name */ ibool rename_also_foreigns) /*!< in: in ALTER TABLE we want to preserve the original table name in constraints which reference it */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Removes an index from the dictionary cache. */ UNIV_INTERN void dict_index_remove_from_cache( /*=========================*/ dict_table_t* table, /*!< in/out: table */ dict_index_t* index) /*!< in, own: index */ __attribute__((nonnull)); /**********************************************************************//** Change the id of a table object in the dictionary cache. This is used in DISCARD TABLESPACE. */ UNIV_INTERN void dict_table_change_id_in_cache( /*==========================*/ dict_table_t* table, /*!< in/out: table object already in cache */ table_id_t new_id) /*!< in: new id to set */ __attribute__((nonnull)); /**********************************************************************//** Removes a foreign constraint struct from the dictionary cache. */ UNIV_INTERN void dict_foreign_remove_from_cache( /*===========================*/ dict_foreign_t* foreign) /*!< in, own: foreign constraint */ __attribute__((nonnull)); /**********************************************************************//** Adds a foreign key constraint object to the dictionary cache. May free the object if there already is an object with the same identifier in. At least one of foreign table or referenced table must already be in the dictionary cache! @return DB_SUCCESS or error code */ UNIV_INTERN dberr_t dict_foreign_add_to_cache( /*======================*/ dict_foreign_t* foreign, /*!< in, own: foreign key constraint */ const char** col_names, /*!< in: column names, or NULL to use foreign->foreign_table->col_names */ bool check_charsets, /*!< in: whether to check charset compatibility */ dict_err_ignore_t ignore_err) /*!< in: error to be ignored */ __attribute__((nonnull(1), warn_unused_result)); /*********************************************************************//** Check if the index is referenced by a foreign key, if TRUE return the matching instance NULL otherwise. @return pointer to foreign key struct if index is defined for foreign key, otherwise NULL */ UNIV_INTERN dict_foreign_t* dict_table_get_referenced_constraint( /*=================================*/ dict_table_t* table, /*!< in: InnoDB table */ dict_index_t* index) /*!< in: InnoDB index */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Checks if a table is referenced by foreign keys. @return TRUE if table is referenced by a foreign key */ UNIV_INTERN ibool dict_table_is_referenced_by_foreign_key( /*====================================*/ const dict_table_t* table) /*!< in: InnoDB table */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Replace the index passed in with another equivalent index in the foreign key lists of the table. @return whether all replacements were found */ UNIV_INTERN bool dict_foreign_replace_index( /*=======================*/ dict_table_t* table, /*!< in/out: table */ const char** col_names, /*!< in: column names, or NULL to use table->col_names */ const dict_index_t* index) /*!< in: index to be replaced */ __attribute__((nonnull(1,3), warn_unused_result)); /**********************************************************************//** Determines whether a string starts with the specified keyword. @return TRUE if str starts with keyword */ UNIV_INTERN ibool dict_str_starts_with_keyword( /*=========================*/ THD* thd, /*!< in: MySQL thread handle */ const char* str, /*!< in: string to scan for keyword */ const char* keyword) /*!< in: keyword to look for */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Checks if a index is defined for a foreign key constraint. Index is a part of a foreign key constraint if the index is referenced by foreign key or index is a foreign key index @return pointer to foreign key struct if index is defined for foreign key, otherwise NULL */ UNIV_INTERN dict_foreign_t* dict_table_get_foreign_constraint( /*==============================*/ dict_table_t* table, /*!< in: InnoDB table */ dict_index_t* index) /*!< in: InnoDB index */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Scans a table create SQL string and adds to the data dictionary the foreign key constraints declared in the string. This function should be called after the indexes for a table have been created. Each foreign key constraint must be accompanied with indexes in bot participating tables. The indexes are allowed to contain more fields than mentioned in the constraint. @return error code or DB_SUCCESS */ UNIV_INTERN dberr_t dict_create_foreign_constraints( /*============================*/ trx_t* trx, /*!< in: transaction */ const char* sql_string, /*!< in: table create statement where foreign keys are declared like: FOREIGN KEY (a, b) REFERENCES table2(c, d), table2 can be written also with the database name before it: test.table2; the default database id the database of parameter name */ size_t sql_length, /*!< in: length of sql_string */ const char* name, /*!< in: table full name in the normalized form database_name/table_name */ ibool reject_fks) /*!< in: if TRUE, fail with error code DB_CANNOT_ADD_CONSTRAINT if any foreign keys are found. */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Parses the CONSTRAINT id's to be dropped in an ALTER TABLE statement. @return DB_SUCCESS or DB_CANNOT_DROP_CONSTRAINT if syntax error or the constraint id does not match */ UNIV_INTERN dberr_t dict_foreign_parse_drop_constraints( /*================================*/ mem_heap_t* heap, /*!< in: heap from which we can allocate memory */ trx_t* trx, /*!< in: transaction */ dict_table_t* table, /*!< in: table */ ulint* n, /*!< out: number of constraints to drop */ const char*** constraints_to_drop) /*!< out: id's of the constraints to drop */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Returns a table object and increments its open handle count. NOTE! This is a high-level function to be used mainly from outside the 'dict' directory. Inside this directory dict_table_get_low is usually the appropriate function. @return table, NULL if does not exist */ UNIV_INTERN dict_table_t* dict_table_open_on_name( /*====================*/ const char* table_name, /*!< in: table name */ ibool dict_locked, /*!< in: TRUE=data dictionary locked */ ibool try_drop, /*!< in: TRUE=try to drop any orphan indexes after an aborted online index creation */ dict_err_ignore_t ignore_err) /*!< in: error to be ignored when loading the table */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Tries to find an index whose first fields are the columns in the array, in the same order and is not marked for deletion and is not the same as types_idx. @return matching index, NULL if not found */ UNIV_INTERN dict_index_t* dict_foreign_find_index( /*====================*/ const dict_table_t* table, /*!< in: table */ const char** col_names, /*!< in: column names, or NULL to use table->col_names */ const char** columns,/*!< in: array of column names */ ulint n_cols, /*!< in: number of columns */ const dict_index_t* types_idx, /*!< in: NULL or an index whose types the column types must match */ bool check_charsets, /*!< in: whether to check charsets. only has an effect if types_idx != NULL */ ulint check_null) /*!< in: nonzero if none of the columns must be declared NOT NULL */ __attribute__((nonnull(1,3), warn_unused_result)); /**********************************************************************//** Returns a column's name. @return column name. NOTE: not guaranteed to stay valid if table is modified in any way (columns added, etc.). */ UNIV_INTERN const char* dict_table_get_col_name( /*====================*/ const dict_table_t* table, /*!< in: table */ ulint col_nr) /*!< in: column number */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Returns a column's name. @return column name. NOTE: not guaranteed to stay valid if table is modified in any way (columns added, etc.). */ UNIV_INTERN const char* dict_table_get_col_name_for_mysql( /*==============================*/ const dict_table_t* table, /*!< in: table */ const char* col_name)/*!< in: MySQL table column name */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Prints a table data. */ UNIV_INTERN void dict_table_print( /*=============*/ dict_table_t* table) /*!< in: table */ __attribute__((nonnull)); /**********************************************************************//** Outputs info on foreign keys of a table. */ UNIV_INTERN void dict_print_info_on_foreign_keys( /*============================*/ ibool create_table_format, /*!< in: if TRUE then print in a format suitable to be inserted into a CREATE TABLE, otherwise in the format of SHOW TABLE STATUS */ FILE* file, /*!< in: file where to print */ trx_t* trx, /*!< in: transaction */ dict_table_t* table) /*!< in: table */ __attribute__((nonnull)); /**********************************************************************//** Outputs info on a foreign key of a table in a format suitable for CREATE TABLE. */ UNIV_INTERN void dict_print_info_on_foreign_key_in_create_format( /*============================================*/ FILE* file, /*!< in: file where to print */ trx_t* trx, /*!< in: transaction */ dict_foreign_t* foreign, /*!< in: foreign key constraint */ ibool add_newline) /*!< in: whether to add a newline */ __attribute__((nonnull(1,3))); /********************************************************************//** Displays the names of the index and the table. */ UNIV_INTERN void dict_index_name_print( /*==================*/ FILE* file, /*!< in: output stream */ const trx_t* trx, /*!< in: transaction */ const dict_index_t* index) /*!< in: index to print */ __attribute__((nonnull(1,3))); /*********************************************************************//** Tries to find an index whose first fields are the columns in the array, in the same order and is not marked for deletion and is not the same as types_idx. @return matching index, NULL if not found */ UNIV_INTERN bool dict_foreign_qualify_index( /*====================*/ const dict_table_t* table, /*!< in: table */ const char** col_names, /*!< in: column names, or NULL to use table->col_names */ const char** columns,/*!< in: array of column names */ ulint n_cols, /*!< in: number of columns */ const dict_index_t* index, /*!< in: index to check */ const dict_index_t* types_idx, /*!< in: NULL or an index whose types the column types must match */ bool check_charsets, /*!< in: whether to check charsets. only has an effect if types_idx != NULL */ ulint check_null) /*!< in: nonzero if none of the columns must be declared NOT NULL */ __attribute__((nonnull(1,3), warn_unused_result)); #ifdef UNIV_DEBUG /********************************************************************//** Gets the first index on the table (the clustered index). @return index, NULL if none exists */ UNIV_INLINE dict_index_t* dict_table_get_first_index( /*=======================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Gets the last index on the table. @return index, NULL if none exists */ UNIV_INLINE dict_index_t* dict_table_get_last_index( /*=======================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Gets the next index on the table. @return index, NULL if none left */ UNIV_INLINE dict_index_t* dict_table_get_next_index( /*======================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); #else /* UNIV_DEBUG */ # define dict_table_get_first_index(table) UT_LIST_GET_FIRST((table)->indexes) # define dict_table_get_last_index(table) UT_LIST_GET_LAST((table)->indexes) # define dict_table_get_next_index(index) UT_LIST_GET_NEXT(indexes, index) #endif /* UNIV_DEBUG */ #endif /* !UNIV_HOTBACKUP */ /* Skip corrupted index */ #define dict_table_skip_corrupt_index(index) \ while (index && dict_index_is_corrupted(index)) { \ index = dict_table_get_next_index(index); \ } /* Get the next non-corrupt index */ #define dict_table_next_uncorrupted_index(index) \ do { \ index = dict_table_get_next_index(index); \ dict_table_skip_corrupt_index(index); \ } while (0) /********************************************************************//** Check whether the index is the clustered index. @return nonzero for clustered index, zero for other indexes */ UNIV_INLINE ulint dict_index_is_clust( /*================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, pure, warn_unused_result)); /********************************************************************//** Check whether the index is unique. @return nonzero for unique index, zero for other indexes */ UNIV_INLINE ulint dict_index_is_unique( /*=================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, pure, warn_unused_result)); /********************************************************************//** Check whether the index is the insert buffer tree. @return nonzero for insert buffer, zero for other indexes */ UNIV_INLINE ulint dict_index_is_ibuf( /*===============*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, pure, warn_unused_result)); /********************************************************************//** Check whether the index is a secondary index or the insert buffer tree. @return nonzero for insert buffer, zero for other indexes */ UNIV_INLINE ulint dict_index_is_sec_or_ibuf( /*======================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, pure, warn_unused_result)); /************************************************************************ Gets the all the FTS indexes for the table. NOTE: must not be called for tables which do not have an FTS-index. */ UNIV_INTERN ulint dict_table_get_all_fts_indexes( /*===========================*/ /* out: number of indexes collected */ dict_table_t* table, /* in: table */ ib_vector_t* indexes)/* out: vector for collecting FTS indexes */ __attribute__((nonnull)); /********************************************************************//** Gets the number of user-defined columns in a table in the dictionary cache. @return number of user-defined (e.g., not ROW_ID) columns of a table */ UNIV_INLINE ulint dict_table_get_n_user_cols( /*=======================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, pure, warn_unused_result)); /********************************************************************//** Gets the number of system columns in a table in the dictionary cache. @return number of system (e.g., ROW_ID) columns of a table */ UNIV_INLINE ulint dict_table_get_n_sys_cols( /*======================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, pure, warn_unused_result)); /********************************************************************//** Gets the number of all columns (also system) in a table in the dictionary cache. @return number of columns of a table */ UNIV_INLINE ulint dict_table_get_n_cols( /*==================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, pure, warn_unused_result)); /********************************************************************//** Gets the approximately estimated number of rows in the table. @return estimated number of rows */ UNIV_INLINE ib_uint64_t dict_table_get_n_rows( /*==================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Increment the number of rows in the table by one. Notice that this operation is not protected by any latch, the number is approximate. */ UNIV_INLINE void dict_table_n_rows_inc( /*==================*/ dict_table_t* table) /*!< in/out: table */ __attribute__((nonnull)); /********************************************************************//** Decrement the number of rows in the table by one. Notice that this operation is not protected by any latch, the number is approximate. */ UNIV_INLINE void dict_table_n_rows_dec( /*==================*/ dict_table_t* table) /*!< in/out: table */ __attribute__((nonnull)); #ifdef UNIV_DEBUG /********************************************************************//** Gets the nth column of a table. @return pointer to column object */ UNIV_INLINE dict_col_t* dict_table_get_nth_col( /*===================*/ const dict_table_t* table, /*!< in: table */ ulint pos) /*!< in: position of column */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Gets the given system column of a table. @return pointer to column object */ UNIV_INLINE dict_col_t* dict_table_get_sys_col( /*===================*/ const dict_table_t* table, /*!< in: table */ ulint sys) /*!< in: DATA_ROW_ID, ... */ __attribute__((nonnull, warn_unused_result)); #else /* UNIV_DEBUG */ #define dict_table_get_nth_col(table, pos) \ ((table)->cols + (pos)) #define dict_table_get_sys_col(table, sys) \ ((table)->cols + (table)->n_cols + (sys) - DATA_N_SYS_COLS) #endif /* UNIV_DEBUG */ /********************************************************************//** Gets the given system column number of a table. @return column number */ UNIV_INLINE ulint dict_table_get_sys_col_no( /*======================*/ const dict_table_t* table, /*!< in: table */ ulint sys) /*!< in: DATA_ROW_ID, ... */ __attribute__((nonnull, warn_unused_result)); #ifndef UNIV_HOTBACKUP /********************************************************************//** Returns the minimum data size of an index record. @return minimum data size in bytes */ UNIV_INLINE ulint dict_index_get_min_size( /*====================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); #endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Check whether the table uses the compact page format. @return TRUE if table uses the compact page format */ UNIV_INLINE ibool dict_table_is_comp( /*===============*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Determine the file format of a table. @return file format version */ UNIV_INLINE ulint dict_table_get_format( /*==================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Determine the file format from a dict_table_t::flags. @return file format version */ UNIV_INLINE ulint dict_tf_get_format( /*===============*/ ulint flags) /*!< in: dict_table_t::flags */ __attribute__((warn_unused_result)); /********************************************************************//** Set the various values in a dict_table_t::flags pointer. */ UNIV_INLINE void dict_tf_set( /*========*/ ulint* flags, /*!< in/out: table */ rec_format_t format, /*!< in: file format */ ulint zip_ssize, /*!< in: zip shift size */ bool remote_path) /*!< in: table uses DATA DIRECTORY */ __attribute__((nonnull)); /********************************************************************//** Convert a 32 bit integer table flags to the 32 bit integer that is written into the tablespace header at the offset FSP_SPACE_FLAGS and is also stored in the fil_space_t::flags field. The following chart shows the translation of the low order bit. Other bits are the same. ========================= Low order bit ========================== | REDUNDANT | COMPACT | COMPRESSED | DYNAMIC dict_table_t::flags | 0 | 1 | 1 | 1 fil_space_t::flags | 0 | 0 | 1 | 1 ================================================================== @return tablespace flags (fil_space_t::flags) */ UNIV_INLINE ulint dict_tf_to_fsp_flags( /*=================*/ ulint flags) /*!< in: dict_table_t::flags */ __attribute__((const)); /********************************************************************//** Extract the compressed page size from table flags. @return compressed page size, or 0 if not compressed */ UNIV_INLINE ulint dict_tf_get_zip_size( /*=================*/ ulint flags) /*!< in: flags */ __attribute__((const)); /********************************************************************//** Check whether the table uses the compressed compact page format. @return compressed page size, or 0 if not compressed */ UNIV_INLINE ulint dict_table_zip_size( /*================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); #ifndef UNIV_HOTBACKUP /*********************************************************************//** Obtain exclusive locks on all index trees of the table. This is to prevent accessing index trees while InnoDB is updating internal metadata for operations such as truncate tables. */ UNIV_INLINE void dict_table_x_lock_indexes( /*======================*/ dict_table_t* table) /*!< in: table */ __attribute__((nonnull)); /*********************************************************************//** Release the exclusive locks on all index tree. */ UNIV_INLINE void dict_table_x_unlock_indexes( /*========================*/ dict_table_t* table) /*!< in: table */ __attribute__((nonnull)); /********************************************************************//** Checks if a column is in the ordering columns of the clustered index of a table. Column prefixes are treated like whole columns. @return TRUE if the column, or its prefix, is in the clustered key */ UNIV_INTERN ibool dict_table_col_in_clustered_key( /*============================*/ const dict_table_t* table, /*!< in: table */ ulint n) /*!< in: column number */ __attribute__((nonnull, warn_unused_result)); /*******************************************************************//** Check if the table has an FTS index. @return TRUE if table has an FTS index */ UNIV_INLINE ibool dict_table_has_fts_index( /*=====================*/ dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /*******************************************************************//** Copies types of columns contained in table to tuple and sets all fields of the tuple to the SQL NULL value. This function should be called right after dtuple_create(). */ UNIV_INTERN void dict_table_copy_types( /*==================*/ dtuple_t* tuple, /*!< in/out: data tuple */ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull)); /******************************************************************** Wait until all the background threads of the given table have exited, i.e., bg_threads == 0. Note: bg_threads_mutex must be reserved when calling this. */ UNIV_INTERN void dict_table_wait_for_bg_threads_to_exit( /*===================================*/ dict_table_t* table, /* in: table */ ulint delay) /* in: time in microseconds to wait between checks of bg_threads. */ __attribute__((nonnull)); /**********************************************************************//** Looks for an index with the given id. NOTE that we do not reserve the dictionary mutex: this function is for emergency purposes like printing info of a corrupt database page! @return index or NULL if not found from cache */ UNIV_INTERN dict_index_t* dict_index_find_on_id_low( /*======================*/ index_id_t id) /*!< in: index id */ __attribute__((warn_unused_result)); /**********************************************************************//** Make room in the table cache by evicting an unused table. The unused table should not be part of FK relationship and currently not used in any user transaction. There is no guarantee that it will remove a table. @return number of tables evicted. */ UNIV_INTERN ulint dict_make_room_in_cache( /*====================*/ ulint max_tables, /*!< in: max tables allowed in cache */ ulint pct_check); /*!< in: max percent to check */ /**********************************************************************//** Adds an index to the dictionary cache. @return DB_SUCCESS, DB_TOO_BIG_RECORD, or DB_CORRUPTION */ UNIV_INTERN dberr_t dict_index_add_to_cache( /*====================*/ dict_table_t* table, /*!< in: table on which the index is */ dict_index_t* index, /*!< in, own: index; NOTE! The index memory object is freed in this function! */ ulint page_no,/*!< in: root page number of the index */ ibool strict) /*!< in: TRUE=refuse to create the index if records could be too big to fit in an B-tree page */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Removes an index from the dictionary cache. */ UNIV_INTERN void dict_index_remove_from_cache( /*=========================*/ dict_table_t* table, /*!< in/out: table */ dict_index_t* index) /*!< in, own: index */ __attribute__((nonnull)); #endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Gets the number of fields in the internal representation of an index, including fields added by the dictionary system. @return number of fields */ UNIV_INLINE ulint dict_index_get_n_fields( /*====================*/ const dict_index_t* index) /*!< in: an internal representation of index (in the dictionary cache) */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Gets the number of fields in the internal representation of an index that uniquely determine the position of an index entry in the index, if we do not take multiversioning into account: in the B-tree use the value returned by dict_index_get_n_unique_in_tree. @return number of fields */ UNIV_INLINE ulint dict_index_get_n_unique( /*====================*/ const dict_index_t* index) /*!< in: an internal representation of index (in the dictionary cache) */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Gets the number of fields in the internal representation of an index which uniquely determine the position of an index entry in the index, if we also take multiversioning into account. @return number of fields */ UNIV_INLINE ulint dict_index_get_n_unique_in_tree( /*============================*/ const dict_index_t* index) /*!< in: an internal representation of index (in the dictionary cache) */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Gets the number of user-defined ordering fields in the index. In the internal representation we add the row id to the ordering fields to make all indexes unique, but this function returns the number of fields the user defined in the index as ordering fields. @return number of fields */ UNIV_INLINE ulint dict_index_get_n_ordering_defined_by_user( /*======================================*/ const dict_index_t* index) /*!< in: an internal representation of index (in the dictionary cache) */ __attribute__((nonnull, warn_unused_result)); #ifdef UNIV_DEBUG /********************************************************************//** Gets the nth field of an index. @return pointer to field object */ UNIV_INLINE dict_field_t* dict_index_get_nth_field( /*=====================*/ const dict_index_t* index, /*!< in: index */ ulint pos) /*!< in: position of field */ __attribute__((nonnull, warn_unused_result)); #else /* UNIV_DEBUG */ # define dict_index_get_nth_field(index, pos) ((index)->fields + (pos)) #endif /* UNIV_DEBUG */ /********************************************************************//** Gets pointer to the nth column in an index. @return column */ UNIV_INLINE const dict_col_t* dict_index_get_nth_col( /*===================*/ const dict_index_t* index, /*!< in: index */ ulint pos) /*!< in: position of the field */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Gets the column number of the nth field in an index. @return column number */ UNIV_INLINE ulint dict_index_get_nth_col_no( /*======================*/ const dict_index_t* index, /*!< in: index */ ulint pos) /*!< in: position of the field */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Looks for column n in an index. @return position in internal representation of the index; ULINT_UNDEFINED if not contained */ UNIV_INLINE ulint dict_index_get_nth_col_pos( /*=======================*/ const dict_index_t* index, /*!< in: index */ ulint n) /*!< in: column number */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Looks for column n in an index. @return position in internal representation of the index; ULINT_UNDEFINED if not contained */ UNIV_INTERN ulint dict_index_get_nth_col_or_prefix_pos( /*=================================*/ const dict_index_t* index, /*!< in: index */ ulint n, /*!< in: column number */ ibool inc_prefix) /*!< in: TRUE=consider column prefixes too */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Returns TRUE if the index contains a column or a prefix of that column. @return TRUE if contains the column or its prefix */ UNIV_INTERN ibool dict_index_contains_col_or_prefix( /*==============================*/ const dict_index_t* index, /*!< in: index */ ulint n) /*!< in: column number */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Looks for a matching field in an index. The column has to be the same. The column in index must be complete, or must contain a prefix longer than the column in index2. That is, we must be able to construct the prefix in index2 from the prefix in index. @return position in internal representation of the index; ULINT_UNDEFINED if not contained */ UNIV_INTERN ulint dict_index_get_nth_field_pos( /*=========================*/ const dict_index_t* index, /*!< in: index from which to search */ const dict_index_t* index2, /*!< in: index */ ulint n) /*!< in: field number in index2 */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Looks for column n position in the clustered index. @return position in internal representation of the clustered index */ UNIV_INTERN ulint dict_table_get_nth_col_pos( /*=======================*/ const dict_table_t* table, /*!< in: table */ ulint n) /*!< in: column number */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Returns the position of a system column in an index. @return position, ULINT_UNDEFINED if not contained */ UNIV_INLINE ulint dict_index_get_sys_col_pos( /*=======================*/ const dict_index_t* index, /*!< in: index */ ulint type) /*!< in: DATA_ROW_ID, ... */ __attribute__((nonnull, warn_unused_result)); /*******************************************************************//** Adds a column to index. */ UNIV_INTERN void dict_index_add_col( /*===============*/ dict_index_t* index, /*!< in/out: index */ const dict_table_t* table, /*!< in: table */ dict_col_t* col, /*!< in: column */ ulint prefix_len) /*!< in: column prefix length */ __attribute__((nonnull)); #ifndef UNIV_HOTBACKUP /*******************************************************************//** Copies types of fields contained in index to tuple. */ UNIV_INTERN void dict_index_copy_types( /*==================*/ dtuple_t* tuple, /*!< in/out: data tuple */ const dict_index_t* index, /*!< in: index */ ulint n_fields) /*!< in: number of field types to copy */ __attribute__((nonnull)); #endif /* !UNIV_HOTBACKUP */ /*********************************************************************//** Gets the field column. @return field->col, pointer to the table column */ UNIV_INLINE const dict_col_t* dict_field_get_col( /*===============*/ const dict_field_t* field) /*!< in: index field */ __attribute__((nonnull, warn_unused_result)); #ifndef UNIV_HOTBACKUP /**********************************************************************//** Returns an index object if it is found in the dictionary cache. Assumes that dict_sys->mutex is already being held. @return index, NULL if not found */ UNIV_INTERN dict_index_t* dict_index_get_if_in_cache_low( /*===========================*/ index_id_t index_id) /*!< in: index id */ __attribute__((warn_unused_result)); #if defined UNIV_DEBUG || defined UNIV_BUF_DEBUG /**********************************************************************//** Returns an index object if it is found in the dictionary cache. @return index, NULL if not found */ UNIV_INTERN dict_index_t* dict_index_get_if_in_cache( /*=======================*/ index_id_t index_id) /*!< in: index id */ __attribute__((warn_unused_result)); #endif /* UNIV_DEBUG || UNIV_BUF_DEBUG */ #ifdef UNIV_DEBUG /**********************************************************************//** Checks that a tuple has n_fields_cmp value in a sensible range, so that no comparison can occur with the page number field in a node pointer. @return TRUE if ok */ UNIV_INTERN ibool dict_index_check_search_tuple( /*==========================*/ const dict_index_t* index, /*!< in: index tree */ const dtuple_t* tuple) /*!< in: tuple used in a search */ __attribute__((nonnull, warn_unused_result)); /** Whether and when to allow temporary index names */ enum check_name { /** Require all indexes to be complete. */ CHECK_ALL_COMPLETE, /** Allow aborted online index creation. */ CHECK_ABORTED_OK, /** Allow partial indexes to exist. */ CHECK_PARTIAL_OK }; /**********************************************************************//** Check for duplicate index entries in a table [using the index name] */ UNIV_INTERN void dict_table_check_for_dup_indexes( /*=============================*/ const dict_table_t* table, /*!< in: Check for dup indexes in this table */ enum check_name check) /*!< in: whether and when to allow temporary index names */ __attribute__((nonnull)); #endif /* UNIV_DEBUG */ /**********************************************************************//** Builds a node pointer out of a physical record and a page number. @return own: node pointer */ UNIV_INTERN dtuple_t* dict_index_build_node_ptr( /*======================*/ const dict_index_t* index, /*!< in: index */ const rec_t* rec, /*!< in: record for which to build node pointer */ ulint page_no,/*!< in: page number to put in node pointer */ mem_heap_t* heap, /*!< in: memory heap where pointer created */ ulint level) /*!< in: level of rec in tree: 0 means leaf level */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Copies an initial segment of a physical record, long enough to specify an index entry uniquely. @return pointer to the prefix record */ UNIV_INTERN rec_t* dict_index_copy_rec_order_prefix( /*=============================*/ const dict_index_t* index, /*!< in: index */ const rec_t* rec, /*!< in: record for which to copy prefix */ ulint* n_fields,/*!< out: number of fields copied */ byte** buf, /*!< in/out: memory buffer for the copied prefix, or NULL */ ulint* buf_size)/*!< in/out: buffer size */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Builds a typed data tuple out of a physical record. @return own: data tuple */ UNIV_INTERN dtuple_t* dict_index_build_data_tuple( /*========================*/ dict_index_t* index, /*!< in: index */ rec_t* rec, /*!< in: record for which to build data tuple */ ulint n_fields,/*!< in: number of data fields */ mem_heap_t* heap) /*!< in: memory heap where tuple created */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Gets the space id of the root of the index tree. @return space id */ UNIV_INLINE ulint dict_index_get_space( /*=================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Sets the space id of the root of the index tree. */ UNIV_INLINE void dict_index_set_space( /*=================*/ dict_index_t* index, /*!< in/out: index */ ulint space) /*!< in: space id */ __attribute__((nonnull)); /*********************************************************************//** Gets the page number of the root of the index tree. @return page number */ UNIV_INLINE ulint dict_index_get_page( /*================*/ const dict_index_t* tree) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Gets the read-write lock of the index tree. @return read-write lock */ UNIV_INLINE rw_lock_t* dict_index_get_lock( /*================*/ dict_index_t* index) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Returns free space reserved for future updates of records. This is relevant only in the case of many consecutive inserts, as updates which make the records bigger might fragment the index. @return number of free bytes on page, reserved for updates */ UNIV_INLINE ulint dict_index_get_space_reserve(void); /*==============================*/ /* Online index creation @{ */ /********************************************************************//** Gets the status of online index creation. @return the status */ UNIV_INLINE enum online_index_status dict_index_get_online_status( /*=========================*/ const dict_index_t* index) /*!< in: secondary index */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Sets the status of online index creation. */ UNIV_INLINE void dict_index_set_online_status( /*=========================*/ dict_index_t* index, /*!< in/out: index */ enum online_index_status status) /*!< in: status */ __attribute__((nonnull)); /********************************************************************//** Determines if a secondary index is being or has been created online, or if the table is being rebuilt online, allowing concurrent modifications to the table. @retval true if the index is being or has been built online, or if this is a clustered index and the table is being or has been rebuilt online @retval false if the index has been created or the table has been rebuilt completely */ UNIV_INLINE bool dict_index_is_online_ddl( /*=====================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Calculates the minimum record length in an index. */ UNIV_INTERN ulint dict_index_calc_min_rec_len( /*========================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); /********************************************************************//** Reserves the dictionary system mutex for MySQL. */ UNIV_INTERN void dict_mutex_enter_for_mysql(void); /*============================*/ /********************************************************************//** Releases the dictionary system mutex for MySQL. */ UNIV_INTERN void dict_mutex_exit_for_mysql(void); /*===========================*/ /** Create a dict_table_t's stats latch or delay for lazy creation. This function is only called from either single threaded environment or from a thread that has not shared the table object with other threads. @param[in,out] table table whose stats latch to create @param[in] enabled if false then the latch is disabled and dict_table_stats_lock()/unlock() become noop on this table. */ void dict_table_stats_latch_create( dict_table_t* table, bool enabled); /** Destroy a dict_table_t's stats latch. This function is only called from either single threaded environment or from a thread that has not shared the table object with other threads. @param[in,out] table table whose stats latch to destroy */ void dict_table_stats_latch_destroy( dict_table_t* table); /**********************************************************************//** Lock the appropriate latch to protect a given table's statistics. table->id is used to pick the corresponding latch from a global array of latches. */ UNIV_INTERN void dict_table_stats_lock( /*==================*/ dict_table_t* table, /*!< in: table */ ulint latch_mode); /*!< in: RW_S_LATCH or RW_X_LATCH */ /**********************************************************************//** Unlock the latch that has been locked by dict_table_stats_lock() */ UNIV_INTERN void dict_table_stats_unlock( /*====================*/ dict_table_t* table, /*!< in: table */ ulint latch_mode); /*!< in: RW_S_LATCH or RW_X_LATCH */ /********************************************************************//** Checks if the database name in two table names is the same. @return TRUE if same db name */ UNIV_INTERN ibool dict_tables_have_same_db( /*=====================*/ const char* name1, /*!< in: table name in the form dbname '/' tablename */ const char* name2) /*!< in: table name in the form dbname '/' tablename */ __attribute__((nonnull, warn_unused_result)); /*********************************************************************//** Removes an index from the cache */ UNIV_INTERN void dict_index_remove_from_cache( /*=========================*/ dict_table_t* table, /*!< in/out: table */ dict_index_t* index) /*!< in, own: index */ __attribute__((nonnull)); /**********************************************************************//** Get index by name @return index, NULL if does not exist */ UNIV_INTERN dict_index_t* dict_table_get_index_on_name( /*=========================*/ dict_table_t* table, /*!< in: table */ const char* name) /*!< in: name of the index to find */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** In case there is more than one index with the same name return the index with the min(id). @return index, NULL if does not exist */ UNIV_INTERN dict_index_t* dict_table_get_index_on_name_and_min_id( /*====================================*/ dict_table_t* table, /*!< in: table */ const char* name) /*!< in: name of the index to find */ __attribute__((nonnull, warn_unused_result)); /*************************************************************** Check whether a column exists in an FTS index. */ UNIV_INLINE ulint dict_table_is_fts_column( /*=====================*/ /* out: ULINT_UNDEFINED if no match else the offset within the vector */ ib_vector_t* indexes,/* in: vector containing only FTS indexes */ ulint col_no) /* in: col number to search for */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Move a table to the non LRU end of the LRU list. */ UNIV_INTERN void dict_table_move_from_lru_to_non_lru( /*================================*/ dict_table_t* table) /*!< in: table to move from LRU to non-LRU */ __attribute__((nonnull)); /**********************************************************************//** Move a table to the LRU list from the non-LRU list. */ UNIV_INTERN void dict_table_move_from_non_lru_to_lru( /*================================*/ dict_table_t* table) /*!< in: table to move from non-LRU to LRU */ __attribute__((nonnull)); /**********************************************************************//** Move to the most recently used segment of the LRU list. */ UNIV_INTERN void dict_move_to_mru( /*=============*/ dict_table_t* table) /*!< in: table to move to MRU */ __attribute__((nonnull)); /** Maximum number of columns in a foreign key constraint. Please Note MySQL has a much lower limit on the number of columns allowed in a foreign key constraint */ #define MAX_NUM_FK_COLUMNS 500 /* Buffers for storing detailed information about the latest foreign key and unique key errors */ extern FILE* dict_foreign_err_file; extern ib_mutex_t dict_foreign_err_mutex; /* mutex protecting the buffers */ /** the dictionary system */ extern dict_sys_t* dict_sys; /** the data dictionary rw-latch protecting dict_sys */ extern rw_lock_t dict_operation_lock; /* Dictionary system struct */ struct dict_sys_t{ ib_mutex_t mutex; /*!< mutex protecting the data dictionary; protects also the disk-based dictionary system tables; this mutex serializes CREATE TABLE and DROP TABLE, as well as reading the dictionary data for a table from system tables */ row_id_t row_id; /*!< the next row id to assign; NOTE that at a checkpoint this must be written to the dict system header and flushed to a file; in recovery this must be derived from the log records */ hash_table_t* table_hash; /*!< hash table of the tables, based on name */ hash_table_t* table_id_hash; /*!< hash table of the tables, based on id */ ulint size; /*!< varying space in bytes occupied by the data dictionary table and index objects */ dict_table_t* sys_tables; /*!< SYS_TABLES table */ dict_table_t* sys_columns; /*!< SYS_COLUMNS table */ dict_table_t* sys_indexes; /*!< SYS_INDEXES table */ dict_table_t* sys_fields; /*!< SYS_FIELDS table */ /*=============================*/ UT_LIST_BASE_NODE_T(dict_table_t) table_LRU; /*!< List of tables that can be evicted from the cache */ UT_LIST_BASE_NODE_T(dict_table_t) table_non_LRU; /*!< List of tables that can't be evicted from the cache */ }; #endif /* !UNIV_HOTBACKUP */ /** dummy index for ROW_FORMAT=REDUNDANT supremum and infimum records */ extern dict_index_t* dict_ind_redundant; /** dummy index for ROW_FORMAT=COMPACT supremum and infimum records */ extern dict_index_t* dict_ind_compact; /**********************************************************************//** Inits dict_ind_redundant and dict_ind_compact. */ UNIV_INTERN void dict_ind_init(void); /*===============*/ /* Auxiliary structs for checking a table definition @{ */ /* This struct is used to specify the name and type that a column must have when checking a table's schema. */ struct dict_col_meta_t { const char* name; /* column name */ ulint mtype; /* required column main type */ ulint prtype_mask; /* required column precise type mask; if this is non-zero then all the bits it has set must also be set in the column's prtype */ ulint len; /* required column length */ }; /* This struct is used for checking whether a given table exists and whether it has a predefined schema (number of columns and columns names and types) */ struct dict_table_schema_t { const char* table_name; /* the name of the table whose structure we are checking */ ulint n_cols; /* the number of columns the table must have */ dict_col_meta_t* columns; /* metadata for the columns; this array has n_cols elements */ ulint n_foreign; /* number of foreign keys this table has, pointing to other tables (where this table is FK child) */ ulint n_referenced; /* number of foreign keys other tables have, pointing to this table (where this table is parent) */ }; /* @} */ /*********************************************************************//** Checks whether a table exists and whether it has the given structure. The table must have the same number of columns with the same names and types. The order of the columns does not matter. The caller must own the dictionary mutex. dict_table_schema_check() @{ @return DB_SUCCESS if the table exists and contains the necessary columns */ UNIV_INTERN dberr_t dict_table_schema_check( /*====================*/ dict_table_schema_t* req_schema, /*!< in/out: required table schema */ char* errstr, /*!< out: human readable error message if != DB_SUCCESS and != DB_TABLE_NOT_FOUND is returned */ size_t errstr_sz) /*!< in: errstr size */ __attribute__((nonnull, warn_unused_result)); /* @} */ /*********************************************************************//** Converts a database and table name from filesystem encoding (e.g. d@i1b/a@q1b@1Kc, same format as used in dict_table_t::name) in two strings in UTF8 encoding (e.g. dцb and aюbØc). The output buffers must be at least MAX_DB_UTF8_LEN and MAX_TABLE_UTF8_LEN bytes. */ UNIV_INTERN void dict_fs2utf8( /*=========*/ const char* db_and_table, /*!< in: database and table names, e.g. d@i1b/a@q1b@1Kc */ char* db_utf8, /*!< out: database name, e.g. dцb */ size_t db_utf8_size, /*!< in: dbname_utf8 size */ char* table_utf8, /*!< out: table name, e.g. aюbØc */ size_t table_utf8_size)/*!< in: table_utf8 size */ __attribute__((nonnull)); /**********************************************************************//** Closes the data dictionary module. */ UNIV_INTERN void dict_close(void); /*============*/ #ifndef UNIV_HOTBACKUP /**********************************************************************//** Check whether the table is corrupted. @return nonzero for corrupted table, zero for valid tables */ UNIV_INLINE ulint dict_table_is_corrupted( /*====================*/ const dict_table_t* table) /*!< in: table */ __attribute__((nonnull, warn_unused_result)); /**********************************************************************//** Check whether the index is corrupted. @return nonzero for corrupted index, zero for valid indexes */ UNIV_INLINE ulint dict_index_is_corrupted( /*====================*/ const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, warn_unused_result)); #endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Flags an index and table corrupted both in the data dictionary cache and in the system table SYS_INDEXES. */ UNIV_INTERN void dict_set_corrupted( /*===============*/ dict_index_t* index, /*!< in/out: index */ trx_t* trx, /*!< in/out: transaction */ const char* ctx) /*!< in: context */ UNIV_COLD __attribute__((nonnull)); /**********************************************************************//** Flags an index corrupted in the data dictionary cache only. This is used mostly to mark a corrupted index when index's own dictionary is corrupted, and we force to load such index for repair purpose */ UNIV_INTERN void dict_set_corrupted_index_cache_only( /*================================*/ dict_index_t* index, /*!< in/out: index */ dict_table_t* table) /*!< in/out: table */ __attribute__((nonnull)); /**********************************************************************//** Flags a table with specified space_id corrupted in the table dictionary cache. @return TRUE if successful */ UNIV_INTERN ibool dict_set_corrupted_by_space( /*========================*/ ulint space_id); /*!< in: space ID */ /********************************************************************//** Validate the table flags. @return true if valid. */ UNIV_INLINE bool dict_tf_is_valid( /*=============*/ ulint flags) /*!< in: table flags */ __attribute__((warn_unused_result)); /********************************************************************//** Check if the tablespace for the table has been discarded. @return true if the tablespace has been discarded. */ UNIV_INLINE bool dict_table_is_discarded( /*====================*/ const dict_table_t* table) /*!< in: table to check */ __attribute__((nonnull, pure, warn_unused_result)); /********************************************************************//** Check if it is a temporary table. @return true if temporary table flag is set. */ UNIV_INLINE bool dict_table_is_temporary( /*====================*/ const dict_table_t* table) /*!< in: table to check */ __attribute__((nonnull, pure, warn_unused_result)); #ifndef UNIV_HOTBACKUP /*********************************************************************//** This function should be called whenever a page is successfully compressed. Updates the compression padding information. */ UNIV_INTERN void dict_index_zip_success( /*===================*/ dict_index_t* index) /*!< in/out: index to be updated. */ __attribute__((nonnull)); /*********************************************************************//** This function should be called whenever a page compression attempt fails. Updates the compression padding information. */ UNIV_INTERN void dict_index_zip_failure( /*===================*/ dict_index_t* index) /*!< in/out: index to be updated. */ __attribute__((nonnull)); /*********************************************************************//** Return the optimal page size, for which page will likely compress. @return page size beyond which page may not compress*/ UNIV_INTERN ulint dict_index_zip_pad_optimal_page_size( /*=================================*/ dict_index_t* index) /*!< in: index for which page size is requested */ __attribute__((nonnull, warn_unused_result)); /*************************************************************//** Convert table flag to row format string. @return row format name */ UNIV_INTERN const char* dict_tf_to_row_format_string( /*=========================*/ ulint table_flag); /*!< in: row format setting */ /*****************************************************************//** Get index by first field of the index @return index which is having first field matches with the field present in field_index position of table */ UNIV_INLINE dict_index_t* dict_table_get_index_on_first_col( /*==============================*/ const dict_table_t* table, /*!< in: table */ ulint col_index); /*!< in: position of column in table */ #endif /* !UNIV_HOTBACKUP */ #ifndef UNIV_NONINL #include "dict0dict.ic" #endif #endif