public function setNullConversion($value)
{
switch (TPropertyValue::ensureEnum($value, 'Prado\\Data\\TDbNullConversionMode')) {
case TDbNullConversionMode::Preserved:
$value = PDO::NULL_NATURAL;
break;
case TDbNullConversionMode::EmptyStringToNull:
$value = PDO::NULL_EMPTY_STRING;
break;
case TDbNullConversionMode::NullToEmptyString:
$value = PDO::NULL_TO_STRING;
break;
}
$this->setAttribute(PDO::ATTR_ORACLE_NULLS, $value);
}