/
ODBCMetaColumn.cpp
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/
ODBCMetaColumn.cpp
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//
// ODBCMetaColumn.cpp
//
// $Id: //poco/Main/Data/ODBC/src/ODBCMetaColumn.cpp#5 $
//
// Library: ODBC
// Package: ODBC
// Module: ODBCMetaColumn
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#include "Poco/Data/ODBC/ODBCMetaColumn.h"
#include "Poco/Data/ODBC/Utility.h"
namespace Poco {
namespace Data {
namespace ODBC {
ODBCMetaColumn::ODBCMetaColumn(const StatementHandle& rStmt, std::size_t position) :
MetaColumn(position),
_rStmt(rStmt)
{
init();
}
ODBCMetaColumn::~ODBCMetaColumn()
{
}
void ODBCMetaColumn::getDescription()
{
std::memset(_columnDesc.name, 0, NAME_BUFFER_LENGTH);
_columnDesc.nameBufferLength = 0;
_columnDesc.dataType = 0;
_columnDesc.size = 0;
_columnDesc.decimalDigits = 0;
_columnDesc.isNullable = 0;
if (Utility::isError(Poco::Data::ODBC::SQLDescribeCol(_rStmt,
(SQLUSMALLINT) position() + 1, // ODBC columns are 1-based
_columnDesc.name,
NAME_BUFFER_LENGTH,
&_columnDesc.nameBufferLength,
&_columnDesc.dataType,
&_columnDesc.size,
&_columnDesc.decimalDigits,
&_columnDesc.isNullable)))
{
throw StatementException(_rStmt);
}
}
void ODBCMetaColumn::init()
{
getDescription();
if (Utility::isError(Poco::Data::ODBC::SQLColAttribute(_rStmt,
(SQLUSMALLINT) position() + 1, // ODBC columns are 1-based
SQL_DESC_LENGTH,
0,
0,
0,
&_dataLength)))
{
throw StatementException(_rStmt);
}
setName(std::string((char*) _columnDesc.name));
setLength(_columnDesc.size);
setPrecision(_columnDesc.decimalDigits);
setNullable(SQL_NULLABLE == _columnDesc.isNullable);
switch(_columnDesc.dataType)
{
case SQL_BIT:
setType(MetaColumn::FDT_BOOL); break;
case SQL_CHAR:
case SQL_VARCHAR:
case SQL_LONGVARCHAR:
case -9:// SQL Server NVARCHAR
case -10:// PostgreSQL VARCHAR (without size specified)
setType(MetaColumn::FDT_STRING); break;
case SQL_TINYINT:
setType(MetaColumn::FDT_INT8); break;
case SQL_SMALLINT:
setType(MetaColumn::FDT_INT16); break;
case SQL_INTEGER:
setType(MetaColumn::FDT_INT32); break;
case SQL_BIGINT:
setType(MetaColumn::FDT_INT64); break;
case SQL_DOUBLE:
case SQL_FLOAT:
setType(MetaColumn::FDT_DOUBLE); break;
case SQL_NUMERIC:
case SQL_DECIMAL:
if (0 == _columnDesc.decimalDigits)
setType(MetaColumn::FDT_INT32);
else
setType(MetaColumn::FDT_DOUBLE);
break;
case SQL_REAL:
setType(MetaColumn::FDT_FLOAT); break;
case SQL_BINARY:
case SQL_VARBINARY:
case SQL_LONGVARBINARY:
case -98:// IBM DB2 non-standard type
setType(MetaColumn::FDT_BLOB); break;
case SQL_TYPE_DATE:
setType(MetaColumn::FDT_DATE); break;
case SQL_TYPE_TIME:
setType(MetaColumn::FDT_TIME); break;
case SQL_TYPE_TIMESTAMP:
setType(MetaColumn::FDT_TIMESTAMP); break;
default:
throw DataFormatException("Unsupported data type.");
}
}
} } } // namespace Poco::Data::ODBC