/**
* Convert postgres Datum into a ConcreteValue object.
*/
AbstractValueSPtr AbstractPGValue::DatumToValue(bool inMemoryIsWritable,
Oid inTypeID, Datum inDatum) const {
// First check if datum is rowtype
if (type_is_rowtype(inTypeID)) {
HeapTupleHeader pgTuple = DatumGetHeapTupleHeader(inDatum);
return AbstractValueSPtr(new PGValue<HeapTupleHeader>(pgTuple));
} else if (type_is_array(inTypeID)) {
ArrayType *pgArray = DatumGetArrayTypeP(inDatum);
if (ARR_NDIM(pgArray) != 1)
throw std::invalid_argument("Multidimensional arrays not yet supported");
if (ARR_HASNULL(pgArray))
throw std::invalid_argument("Arrays with NULLs not yet supported");
switch (ARR_ELEMTYPE(pgArray)) {
case FLOAT8OID: {
MemHandleSPtr memoryHandle(new PGArrayHandle(pgArray));
if (inMemoryIsWritable) {
return AbstractValueSPtr(
new ConcreteValue<Array<double> >(
Array<double>(memoryHandle,
boost::extents[ ARR_DIMS(pgArray)[0] ])
)
);
} else {
return AbstractValueSPtr(
new ConcreteValue<Array_const<double> >(
Array_const<double>(memoryHandle,
boost::extents[ ARR_DIMS(pgArray)[0] ])
)
);
}
}
}
}
switch (inTypeID) {
case BOOLOID: return AbstractValueSPtr(
new ConcreteValue<bool>( DatumGetBool(inDatum) ));
case INT2OID: return AbstractValueSPtr(
new ConcreteValue<int16_t>( DatumGetInt16(inDatum) ));
case INT4OID: return AbstractValueSPtr(
new ConcreteValue<int32_t>( DatumGetInt32(inDatum) ));
case INT8OID: return AbstractValueSPtr(
new ConcreteValue<int64_t>( DatumGetInt64(inDatum) ));
case FLOAT4OID: return AbstractValueSPtr(
new ConcreteValue<float>( DatumGetFloat4(inDatum) ));
case FLOAT8OID: return AbstractValueSPtr(
new ConcreteValue<double>( DatumGetFloat8(inDatum) ));
}
return AbstractValueSPtr();
}
/**
* @brief Convert postgres Datum into a ConcreteValue object.
*/
AbstractValueSPtr PGAbstractValue::DatumToValue(bool inMemoryIsWritable,
Oid inTypeID, Datum inDatum) const {
bool isTuple;
bool isArray;
HeapTupleHeader pgTuple;
ArrayType *pgArray;
bool errorOccurred = false;
PG_TRY(); {
isTuple = type_is_rowtype(inTypeID);
isArray = type_is_array(inTypeID);
if (isTuple)
pgTuple = DatumGetHeapTupleHeader(inDatum);
else if (isArray)
pgArray = DatumGetArrayTypeP(inDatum);
} PG_CATCH(); {
errorOccurred = true;
} PG_END_TRY();
BOOST_ASSERT_MSG(errorOccurred == false, "An exception occurred while "
"converting a PostgreSQL datum to DBAL object.");
// First check if datum is rowtype
if (isTuple) {
return AbstractValueSPtr(new PGValue<HeapTupleHeader>(pgTuple));
} else if (isArray) {
if (ARR_NDIM(pgArray) != 1)
throw std::invalid_argument("Multidimensional arrays not yet supported");
if (ARR_HASNULL(pgArray))
throw std::invalid_argument("Arrays with NULLs not yet supported");
switch (ARR_ELEMTYPE(pgArray)) {
case FLOAT8OID: {
MemHandleSPtr memoryHandle(new PGArrayHandle(pgArray));
if (inMemoryIsWritable) {
return AbstractValueSPtr(
new ConcreteValue<Array<double> >(
Array<double>(memoryHandle,
boost::extents[ ARR_DIMS(pgArray)[0] ])
)
);
} else {
return AbstractValueSPtr(
new ConcreteValue<Array_const<double> >(
Array_const<double>(memoryHandle,
boost::extents[ ARR_DIMS(pgArray)[0] ])
)
);
}
}
// FIXME: Default case
}
}
switch (inTypeID) {
case BOOLOID: return AbstractValueSPtr(
new ConcreteValue<bool>( DatumGetBool(inDatum) ));
case INT2OID: return AbstractValueSPtr(
new ConcreteValue<int16_t>( DatumGetInt16(inDatum) ));
case INT4OID: return AbstractValueSPtr(
new ConcreteValue<int32_t>( DatumGetInt32(inDatum) ));
case INT8OID: return AbstractValueSPtr(
new ConcreteValue<int64_t>( DatumGetInt64(inDatum) ));
case FLOAT4OID: return AbstractValueSPtr(
new ConcreteValue<float>( DatumGetFloat4(inDatum) ));
case FLOAT8OID: return AbstractValueSPtr(
new ConcreteValue<double>( DatumGetFloat8(inDatum) ));
}
return AbstractValueSPtr();
}
