mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 10:56:12 +01:00
136 lines
4 KiB
C++
136 lines
4 KiB
C++
/*****************************************************************************
|
|
|
|
Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
|
|
Copyright (c) 2019, 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, Fifth Floor, Boston, MA 02110-1335 USA
|
|
|
|
*****************************************************************************/
|
|
|
|
/**************************************************//**
|
|
@file include/dict0crea.ic
|
|
Database object creation
|
|
|
|
Created 1/8/1996 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#include "ha_prototypes.h"
|
|
|
|
#include "mem0mem.h"
|
|
|
|
/********************************************************************//**
|
|
Generate a foreign key constraint name when it was not named by the user.
|
|
A generated constraint has a name of the format dbname/tablename_ibfk_NUMBER,
|
|
where the numbers start from 1, and are given locally for this table, that is,
|
|
the number is not global, as it used to be before MySQL 4.0.18. */
|
|
UNIV_INLINE
|
|
dberr_t
|
|
dict_create_add_foreign_id(
|
|
/*=======================*/
|
|
ulint* id_nr, /*!< in/out: number to use in id generation;
|
|
incremented if used */
|
|
const char* name, /*!< in: table name */
|
|
dict_foreign_t* foreign)/*!< in/out: foreign key */
|
|
{
|
|
DBUG_ENTER("dict_create_add_foreign_id");
|
|
|
|
if (foreign->id == NULL) {
|
|
/* Generate a new constraint id */
|
|
ulint namelen = strlen(name);
|
|
char* id = static_cast<char*>(
|
|
mem_heap_alloc(foreign->heap,
|
|
namelen + 20));
|
|
|
|
if (dict_table_t::is_temporary_name(name)) {
|
|
|
|
/* no overflow if number < 1e13 */
|
|
sprintf(id, "%s_ibfk_%lu", name,
|
|
(ulong) (*id_nr)++);
|
|
} else {
|
|
char table_name[MAX_TABLE_NAME_LEN + 21];
|
|
uint errors = 0;
|
|
|
|
strncpy(table_name, name, (sizeof table_name) - 1);
|
|
table_name[(sizeof table_name) - 1] = '\0';
|
|
|
|
innobase_convert_to_system_charset(
|
|
strchr(table_name, '/') + 1,
|
|
strchr(name, '/') + 1,
|
|
MAX_TABLE_NAME_LEN, &errors);
|
|
|
|
if (errors) {
|
|
strncpy(table_name, name,
|
|
(sizeof table_name) - 1);
|
|
table_name[(sizeof table_name) - 1] = '\0';
|
|
}
|
|
|
|
/* no overflow if number < 1e13 */
|
|
sprintf(id, "%s_ibfk_%lu", table_name,
|
|
(ulong) (*id_nr)++);
|
|
|
|
if (innobase_check_identifier_length(
|
|
strchr(id,'/') + 1)) {
|
|
DBUG_RETURN(DB_IDENTIFIER_TOO_LONG);
|
|
}
|
|
}
|
|
foreign->id = id;
|
|
|
|
DBUG_PRINT("dict_create_add_foreign_id",
|
|
("generated foreign id: %s", id));
|
|
}
|
|
|
|
|
|
DBUG_RETURN(DB_SUCCESS);
|
|
}
|
|
|
|
/** Compose a column number for a virtual column, stored in the "POS" field
|
|
of Sys_columns. The column number includes both its virtual column sequence
|
|
(the "nth" virtual column) and its actual column position in original table
|
|
@param[in] v_pos virtual column sequence
|
|
@param[in] col_pos column position in original table definition
|
|
@return composed column position number */
|
|
UNIV_INLINE
|
|
ulint
|
|
dict_create_v_col_pos(
|
|
ulint v_pos,
|
|
ulint col_pos)
|
|
{
|
|
ut_ad(v_pos <= REC_MAX_N_FIELDS);
|
|
ut_ad(col_pos <= REC_MAX_N_FIELDS);
|
|
|
|
return(((v_pos + 1) << 16) + col_pos);
|
|
}
|
|
|
|
/** Get the column number for a virtual column (the column position in
|
|
original table), stored in the "POS" field of Sys_columns
|
|
@param[in] pos virtual column position
|
|
@return column position in original table */
|
|
UNIV_INLINE
|
|
ulint
|
|
dict_get_v_col_mysql_pos(
|
|
ulint pos)
|
|
{
|
|
return(pos & 0xFFFF);
|
|
}
|
|
|
|
/** Get a virtual column sequence (the "nth" virtual column) for a
|
|
virtual column, stord in the "POS" field of Sys_columns
|
|
@param[in] pos virtual column position
|
|
@return virtual column sequence */
|
|
UNIV_INLINE
|
|
ulint
|
|
dict_get_v_col_pos(
|
|
ulint pos)
|
|
{
|
|
return((pos >> 16) - 1);
|
|
}
|