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// file : odb/sqlite/statement.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_SQLITE_STATEMENT_HXX
#define ODB_SQLITE_STATEMENT_HXX
#include <odb/pre.hxx>
#include <sqlite3.h>
#include <string>
#include <cstddef> // std::size_t
#include <odb/forward.hxx>
#include <odb/details/shared-ptr.hxx>
#include <odb/sqlite/version.hxx>
#include <odb/sqlite/binding.hxx>
#include <odb/sqlite/details/export.hxx>
namespace odb
{
namespace sqlite
{
class connection;
class LIBODB_SQLITE_EXPORT statement: public details::shared_base
{
public:
virtual
~statement () = 0;
protected:
statement (connection&, const std::string& statement);
statement (connection&, const char* statement, std::size_t n);
void
bind_param (const bind*, std::size_t count, std::size_t start_param = 0);
// Extract row columns into the bound buffers. If the truncated
// argument is true, then only truncated columns are extracted.
// Return true if all the data was extracted successfully and
// false if one or more columns were truncated.
//
bool
bind_result (const bind*, std::size_t count, bool truncated = false);
protected:
connection& conn_;
sqlite3_stmt* stmt_;
};
class LIBODB_SQLITE_EXPORT simple_statement: public statement
{
public:
simple_statement (connection&, const std::string& statement);
simple_statement (connection&, const char* statement, std::size_t n);
unsigned long long
execute ();
private:
simple_statement (const simple_statement&);
simple_statement& operator= (const simple_statement&);
private:
bool result_set_;
};
class LIBODB_SQLITE_EXPORT select_statement: public statement
{
public:
select_statement (connection& conn,
const std::string& statement,
binding& cond,
binding& data);
// Common select interface expected by the generated code.
//
public:
enum result
{
success,
no_data,
truncated
};
void
execute ();
// Load next row columns into bound buffers.
//
result
fetch ()
{
return next () ? load () : no_data;
}
// Reload truncated columns into bound buffers.
//
void
refetch ()
{
reload ();
}
// Free the result set.
//
void
free_result ()
{
}
// More fine-grained SQLite-specific interface that splits fetch()
// into next() and load().
//
public:
// Return false if there is no more rows.
//
bool
next ();
result
load ();
void
reload ();
private:
select_statement (const select_statement&);
select_statement& operator= (const select_statement&);
private:
bool done_;
binding& cond_;
binding& data_;
};
class LIBODB_SQLITE_EXPORT insert_statement: public statement
{
public:
insert_statement (connection& conn,
const std::string& statement,
binding& data);
// 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& data_;
};
class LIBODB_SQLITE_EXPORT update_statement: public statement
{
public:
update_statement (connection& conn,
const std::string& statement,
binding& cond,
binding& data);
void
execute ();
private:
update_statement (const update_statement&);
update_statement& operator= (const update_statement&);
private:
binding& cond_;
binding& data_;
};
class LIBODB_SQLITE_EXPORT delete_statement: public statement
{
public:
delete_statement (connection& conn,
const std::string& statement,
binding& cond);
unsigned long long
execute ();
private:
delete_statement (const delete_statement&);
delete_statement& operator= (const delete_statement&);
private:
binding& cond_;
};
}
}
#include <odb/post.hxx>
#endif // ODB_SQLITE_STATEMENT_HXX
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