public expression(Ioperand ol, comparisonoperator _opdef, Ioperand or)
{
/* binary operation */
operand_l = ol;
opdef = _opdef;
operand_r = or;
}
public Ioperand operand_r; /* null for non-binary operators */
public expression(Ioperand ol, comparisonoperator _opdef)
{
/* unary: only limited subset of possible operators */
switch (_opdef)
{
case comparisonoperator.coIsnull:
case comparisonoperator.coNotnull:
case comparisonoperator.coHastext:
case comparisonoperator.coHasNoText:
case comparisonoperator.coExists:
case comparisonoperator.coNotExists:
break;
default:
throw new ArgumentOutOfRangeException(String.Format("_opdef '{0}' asks for two operands", _opdef.ToString()));
}
operand_l = ol;
opdef = _opdef;
/* [rzamponi 20100112] FxCop CA1805:DoNotInitializeUnnecessarily */
//operand_r = null;
}
public selectfield(selectfunctiondef func, expression expression, string rowsource_consumeralias, Ioperand literalconst, string fieldname, string asname, selectstatement subqry, sortorder order)
{
/* [rzamponi 20100112] FxCop CA1805:DoNotInitializeUnnecessarily */
//if (func == selectfunctiondef.none) Function = null; else Function = new selectfunction(func);
if (func != selectfunctiondef.none)
{
Function = new selectfunction(func);
}
Expression = expression;
RowsourceConsumerAlias = rowsource_consumeralias;
literal = literalconst;
Fieldname = fieldname;
AsName = asname;
subquery = subqry;
if (order == sortorder.so_asc)
{
Ascending = true;
}
else if (order == sortorder.so_desc)
{
Descending = true;
}
}
public selectfield(selectfunctiondef func, string rowsource_consumeralias, Ioperand literalconst, string fieldname, string asname, selectstatement subqry, sortorder order) : this(func, null, rowsource_consumeralias, literalconst, fieldname, asname, subqry, order)
{
}
