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// file : odb/mysql/statement.hxx
// copyright : Copyright (c) 2005-2012 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_MYSQL_STATEMENT_HXX
#define ODB_MYSQL_STATEMENT_HXX
#include <odb/pre.hxx>
#include <string>
#include <cstddef> // std::size_t
#include <odb/forward.hxx>
#include <odb/statement.hxx>
#include <odb/mysql/mysql.hxx>
#include <odb/mysql/version.hxx>
#include <odb/mysql/binding.hxx>
#include <odb/mysql/connection.hxx>
#include <odb/mysql/auto-handle.hxx>
#include <odb/mysql/details/export.hxx>
namespace odb
{
namespace mysql
{
class connection;
class LIBODB_MYSQL_EXPORT statement: public odb::statement
{
public:
typedef mysql::connection connection_type;
virtual
~statement () = 0;
MYSQL_STMT*
handle () const
{
return stmt_;
}
virtual const char*
text () const;
virtual connection_type&
connection ()
{
return conn_;
}
// Cancel the statement execution (e.g., result fetching) so
// that another statement can be executed on the connection.
//
virtual void
cancel ();
protected:
statement (connection_type&, const std::string& text);
statement (connection_type&, const char* text, bool copy_text);
private:
void
init (std::size_t text_size);
protected:
connection_type& conn_;
std::string text_copy_;
const char* text_;
auto_handle<MYSQL_STMT> stmt_;
};
class LIBODB_MYSQL_EXPORT select_statement: public statement
{
public:
virtual
~select_statement ();
select_statement (connection_type& conn,
const std::string& text,
binding& param,
binding& result);
select_statement (connection_type& conn,
const char* text,
binding& param,
binding& result,
bool copy_text = true);
select_statement (connection_type& conn,
const std::string& text,
binding& result);
select_statement (connection_type& conn,
const char* text,
binding& result,
bool copy_text = true);
enum result
{
success,
no_data,
truncated
};
void
execute ();
void
cache ();
bool
cached () const
{
return cached_;
}
// Can only be called on a cached result.
//
std::size_t
result_size () const
{
return size_;
}
// Number of rows already fetched.
//
std::size_t
fetched () const
{
return rows_;
}
// Fetch next or current row depending on the next argument.
// Note that fetching of the current row is only supported
// if the result is cached.
//
result
fetch (bool next = true);
void
refetch ();
void
free_result ();
virtual void
cancel ();
private:
select_statement (const select_statement&);
select_statement& operator= (const select_statement&);
private:
bool end_;
bool cached_;
bool freed_;
std::size_t rows_;
std::size_t size_;
binding* param_;
std::size_t param_version_;
binding& result_;
std::size_t result_version_;
};
struct LIBODB_MYSQL_EXPORT auto_result
{
explicit auto_result (select_statement& s): s_ (s) {}
~auto_result () {s_.free_result ();}
private:
auto_result (const auto_result&);
auto_result& operator= (const auto_result&);
private:
select_statement& s_;
};
class LIBODB_MYSQL_EXPORT insert_statement: public statement
{
public:
virtual
~insert_statement ();
insert_statement (connection_type& conn,
const std::string& text,
binding& param);
insert_statement (connection_type& conn,
const char* text,
binding& param,
bool copy_text = true);
// Return true if successful and false if the row is a duplicate.
// All other errors are reported by throwing exceptions.
//
bool
execute ();
unsigned long long
id ();
private:
insert_statement (const insert_statement&);
insert_statement& operator= (const insert_statement&);
private:
binding& param_;
std::size_t param_version_;
};
class LIBODB_MYSQL_EXPORT update_statement: public statement
{
public:
virtual
~update_statement ();
update_statement (connection_type& conn,
const std::string& text,
binding& param);
update_statement (connection_type& conn,
const char* text,
binding& param,
bool copy_text = true);
unsigned long long
execute ();
private:
update_statement (const update_statement&);
update_statement& operator= (const update_statement&);
private:
binding& param_;
std::size_t param_version_;
};
class LIBODB_MYSQL_EXPORT delete_statement: public statement
{
public:
virtual
~delete_statement ();
delete_statement (connection_type& conn,
const std::string& text,
binding& param);
delete_statement (connection_type& conn,
const char* text,
binding& param,
bool copy_text = true);
unsigned long long
execute ();
private:
delete_statement (const delete_statement&);
delete_statement& operator= (const delete_statement&);
private:
binding& param_;
std::size_t param_version_;
};
}
}
#include <odb/post.hxx>
#endif // ODB_MYSQL_STATEMENT_HXX
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