// Implements the following "truth" table for the aggregate and
// running sequence function sum.
// A B result
// x y call eval to compute A=x+y
// x N set y to nonnull and zero and call eval to compute A=x+0
// N y set x to nonnull and zero and call eval to compute A=0+y
// N N set result to null.
//
ex_expr::exp_return_type
ex_arith_sum_clause::processNulls(char *null_data[],
CollHeap *heap,
ComDiagsArea **diagsArea)
{
// If both x and y are NULL, the result is NULL. Make it so and do not
// call eval.
//
if(!null_data[1] && !null_data[2])
{
ExpTupleDesc::setNullValue(null_data[0],
getOperand(0)->getNullBitIndex(),
getOperand(0)->getTupleFormat() );
return ex_expr::EXPR_NULL;
}
// If only x is NULL, then the result is y.
//
if(!null_data[1])
{
CopyAttributes(null_data[2*MAX_OPERANDS+0], null_data[0],
null_data[MAX_OPERANDS+0], getOperand(0),
null_data[2*MAX_OPERANDS+2], null_data[2],
null_data[MAX_OPERANDS+2], getOperand(2));
return ex_expr::EXPR_NULL;
}
// If only y is NULL, then the result is x.
//
if(!null_data[2])
{
CopyAttributes(null_data[2*MAX_OPERANDS+0], null_data[0],
null_data[MAX_OPERANDS+0], getOperand(0),
null_data[2*MAX_OPERANDS+1], null_data[1],
null_data[MAX_OPERANDS+1], getOperand(1));
return ex_expr::EXPR_NULL;
}
// Otherwise, set the result to not null and call eval to compute x+y.
//
ExpTupleDesc::clearNullValue(null_data[0],
getOperand(0)->getNullBitIndex(),
getOperand(0)->getTupleFormat() );
return ex_expr::EXPR_OK;
}
BOOL CEditPoly::CopyEditPoly( CEditPoly *pPoly, BOOL bCopyIndices, CStringHolder *pStringHolder )
{
if( bCopyIndices )
m_Indices.CopyArray( pPoly->m_Indices );
CopyAttributes( pPoly, pStringHolder );
m_pBrush = pPoly->m_pBrush;
return TRUE;
}
/* ----------------------------------------------------------------------
TtaCopyAttributes
Copy all attributes of the src element to the target element
Parameters:
src: the element which provides attributes.
target: the element which receives attributes.
---------------------------------------------------------------------- */
void TtaCopyAttributes (Element src, Element target,
Document doc_src, Document doc_target)
{
UserErrorCode = 0;
if (src == NULL || target == NULL)
TtaError (ERR_invalid_parameter);
else
{
CopyAttributes ((PtrElement)src, (PtrElement)target,
LoadedDocument[doc_src - 1],
LoadedDocument[doc_target - 1],
TRUE, FALSE);
}
}
Primitive* BezierCurve::Copy() const
{
Primitive* primitive = new BezierCurve(points);
CopyAttributes(primitive);
return primitive;
}
Primitive* Polygon::Copy() const
{
Primitive* primitive = new Polygon(points);
CopyAttributes(primitive);
return primitive;
}
