private SqlObject ReduceUnary(SqlObject value)
{
switch (ExpressionType)
{
case SqlExpressionType.UnaryPlus:
return(value.Plus());
case SqlExpressionType.Negate:
return(value.Negate());
case SqlExpressionType.Not:
return(value.Not());
default:
throw new SqlExpressionException($"Expression of type {ExpressionType} is not unary.");
}
}