1 #ifndef SQL_SCHEMA_H_INCLUDED 2 #define SQL_SCHEMA_H_INCLUDED 3 /* 4 Copyright (c) 2020, MariaDB Corporation. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; version 2 of the License. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ 18 19 #include "mysqld.h" 20 #include "lex_string.h" 21 22 class Schema 23 { 24 LEX_CSTRING m_name; 25 public: Schema(const LEX_CSTRING & name)26 Schema(const LEX_CSTRING &name) 27 :m_name(name) 28 { } ~Schema()29 virtual ~Schema() { } name()30 const LEX_CSTRING &name() const { return m_name; } map_data_type(THD * thd,const Type_handler * src)31 virtual const Type_handler *map_data_type(THD *thd, const Type_handler *src) 32 const 33 { 34 return src; 35 } 36 /* 37 For now we have *hard-coded* compatibility schemas: 38 schema_mariadb, schema_oracle, schema_maxdb. 39 But eventually we'll turn then into real databases on disk. 40 So the code below compares names according to the filesystem 41 case sensitivity, like it is done for regular databases. 42 43 Note, this is different to information_schema, whose name 44 is always case insensitive. This is intentional! 45 The assymetry will be gone when we'll implement SQL standard 46 regular and delimited identifiers. 47 */ eq_name(const LEX_CSTRING & name)48 bool eq_name(const LEX_CSTRING &name) const 49 { 50 #if MYSQL_VERSION_ID > 100500 51 #error Remove the old code 52 return !table_alias_charset->strnncoll(m_name.str, m_name.length, 53 name.str, name.length); 54 #else 55 // Please remove this when merging to 10.5 56 return !table_alias_charset->coll->strnncoll(table_alias_charset, 57 (const uchar *) m_name.str, 58 m_name.length, 59 (const uchar *) name.str, 60 name.length, FALSE); 61 #endif 62 } 63 static Schema *find_by_name(const LEX_CSTRING &name); 64 static Schema *find_implied(THD *thd); 65 }; 66 67 68 extern Schema mariadb_schema; 69 70 #endif // SQL_SCHEMA_H_INCLUDED 71