mirror of
https://github.com/MariaDB/server.git
synced 2025-11-04 04:46:15 +01:00
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
#ifndef SQL_SCHEMA_H_INCLUDED
|
|
#define SQL_SCHEMA_H_INCLUDED
|
|
/*
|
|
Copyright (c) 2020, 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 St, Fifth Floor, Boston, MA 02110-1335 USA */
|
|
|
|
#include "mysqld.h"
|
|
#include "lex_string.h"
|
|
|
|
class Lex_ident_sys;
|
|
class Create_func;
|
|
|
|
class Schema
|
|
{
|
|
LEX_CSTRING m_name;
|
|
public:
|
|
Schema(const LEX_CSTRING &name)
|
|
:m_name(name)
|
|
{ }
|
|
virtual ~Schema() = default;
|
|
const LEX_CSTRING &name() const { return m_name; }
|
|
virtual const Type_handler *map_data_type(THD *thd, const Type_handler *src)
|
|
const
|
|
{
|
|
return src;
|
|
}
|
|
|
|
/**
|
|
Find a native function builder, return an error if not found,
|
|
build an Item otherwise.
|
|
*/
|
|
Item *make_item_func_call_native(THD *thd,
|
|
const Lex_ident_sys &name,
|
|
List<Item> *args) const;
|
|
|
|
/**
|
|
Find the native function builder associated with a given function name.
|
|
@param thd The current thread
|
|
@param name The native function name
|
|
@return The native function builder associated with the name, or NULL
|
|
*/
|
|
virtual Create_func *find_native_function_builder(THD *thd,
|
|
const LEX_CSTRING &name)
|
|
const;
|
|
|
|
// Builders for native SQL function with a special syntax in sql_yacc.yy
|
|
virtual Item *make_item_func_replace(THD *thd,
|
|
Item *subj,
|
|
Item *find,
|
|
Item *replace) const;
|
|
virtual Item *make_item_func_substr(THD *thd,
|
|
const Lex_substring_spec_st &spec) const;
|
|
|
|
virtual Item *make_item_func_trim(THD *thd, const Lex_trim_st &spec) const;
|
|
|
|
/*
|
|
For now we have *hard-coded* compatibility schemas:
|
|
schema_mariadb, schema_oracle, schema_maxdb.
|
|
But eventually we'll turn then into real databases on disk.
|
|
So the code below compares names according to the filesystem
|
|
case sensitivity, like it is done for regular databases.
|
|
|
|
Note, this is different to information_schema, whose name
|
|
is always case insensitive. This is intentional!
|
|
The assymetry will be gone when we'll implement SQL standard
|
|
regular and delimited identifiers.
|
|
*/
|
|
bool eq_name(const LEX_CSTRING &name) const
|
|
{
|
|
return !table_alias_charset->strnncoll(m_name.str, m_name.length,
|
|
name.str, name.length);
|
|
}
|
|
static Schema *find_by_name(const LEX_CSTRING &name);
|
|
static Schema *find_implied(THD *thd);
|
|
};
|
|
|
|
|
|
extern Schema mariadb_schema;
|
|
extern const Schema &oracle_schema_ref;
|
|
|
|
#endif // SQL_SCHEMA_H_INCLUDED
|