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// file : odb/oracle/statement.hxx
// author : Constantin Michael <constantin@codesynthesis.com>
// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
// license : ODB NCUEL; see accompanying LICENSE file
#ifndef ODB_ORACLE_STATEMENT_HXX
#define ODB_ORACLE_STATEMENT_HXX
#include <odb/pre.hxx>
#include <string>
#include <cstddef> // std::size_t
#include <odb/forward.hxx>
#include <odb/details/shared-ptr.hxx>
#include <odb/oracle/version.hxx>
#include <odb/oracle/binding.hxx>
#include <odb/oracle/forward.hxx>
#include <odb/oracle/oracle-fwd.hxx>
#include <odb/oracle/auto-handle.hxx>
#include <odb/oracle/details/export.hxx>
namespace odb
{
namespace oracle
{
class LIBODB_ORACLE_EXPORT statement: public details::shared_base
{
public:
virtual
~statement () = 0;
protected:
statement (connection&, const std::string& statement);
// Bind output parameters to this statement. This function must only
// be called once. Multiple calls to it will result in memory leaks due
// to lost OCIBind resources.
//
void
bind_param (bind*, std::size_t count, std::size_t offset);
// Bind input parameters to this statement. This function must only be
// called once. Multiple calls to it will result in memory leaks due to
// lost OCIDefine resources.
//
void
bind_result (bind*,
std::size_t count,
std::size_t lob_prefetch_size = 0);
// Stream the result LOBs, calling user callbacks where necessary.
//
void
stream_result_lobs ();
protected:
connection& conn_;
auto_handle<OCIStmt> stmt_;
bind* result_binds_;
std::size_t count_;
};
class LIBODB_ORACLE_EXPORT select_statement: public statement
{
public:
virtual
~select_statement ();
select_statement (connection& conn,
const std::string& statement,
binding& cond,
binding& data,
std::size_t lob_prefetch_size = 0);
enum result
{
success,
no_data
};
void
execute ();
result
fetch ();
void
free_result ();
private:
select_statement (const select_statement&);
select_statement& operator= (const select_statement&);
private:
bool done_;
};
class LIBODB_ORACLE_EXPORT insert_statement: public statement
{
public:
virtual
~insert_statement ();
insert_statement (connection& conn,
const std::string& statement,
binding& data,
bool returning);
// 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&);
// Only OCI versions 11.2 and greater support conversion of the internal
// Oracle type NUMBER to an external 64-bit integer type. If we detect
// version 11.2 or greater we provide an unsigned long long image.
// Otherwise, we revert to using a 32-bit unsigned integer.
//
public:
struct id_bind_type
{
union
{
unsigned int value32;
unsigned long long value64;
} id;
sb2 indicator;
};
private:
id_bind_type id_bind_;
};
class LIBODB_ORACLE_EXPORT update_statement: public statement
{
public:
virtual
~update_statement ();
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&);
};
class LIBODB_ORACLE_EXPORT delete_statement: public statement
{
public:
virtual
~delete_statement ();
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&);
};
}
}
#include <odb/post.hxx>
#endif // ODB_ORACLE_STATEMENT_HXX
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