internal RankingOrderByChainer(Chainer prev, OrderingArgument[] columns)
: base(prev)
{
Build = (buildContext, buildArgs) =>
{
var sql = Text.GenerateSql(30)
.Append(Text.OrderBy).S()
.Append(OrderingArgument.Concatenate(columns, buildContext, buildArgs, false))
.ToString();
TryThrow(buildContext);
return(sql);
};
}
// ctor: Maximized
internal Predicate(
DbNode subject,
MaximizationType maximizationType,
bool sign,
LogicalOperator logicalOperator,
OrderingArgument maximizedExpression,
long top = 1)
{
DbMapping.CheckNullAndThrow(subject);
if (maximizedExpression == null)
{
throw new QueryTalkException("Predicate.ctor", QueryTalkExceptionType.ArgumentNull,
"maximized expression = null", Text.Method.HavingMaxMin);
}
// check expression DbColumn type
if (maximizedExpression.ArgType == typeof(DbColumn))
{
var column = (DbColumn)maximizedExpression.Original;
if (column.Parent != null && column.Parent.Prev != null)
{
throw new QueryTalkException("Predicate.ctor", QueryTalkExceptionType.InvalidHavingPredicateArgument,
String.Format("node = {0}", column.Parent), Text.Method.HavingMaxMin);
}
// column parent must be the same as the subject
if (!column.Parent.Equals(subject))
{
throw new QueryTalkException("Predicate.ctor", QueryTalkExceptionType.InvalidHavingPredicateArgument,
String.Format("node = {0}{1} subject = {2}", column.Parent, Environment.NewLine, subject),
Text.Method.HavingMaxMin);
}
}
Subject = subject;
Sign = sign;
LogicalOperator = logicalOperator;
PredicateType = Wall.PredicateType.Maximized;
MaximizedType = maximizationType;
MaximizedExpression = maximizedExpression;
MaximizedTop = top;
IsFinalizeable = true;
subject.IsFinalizeable = true;
}
private void _Body(OrderingArgument[] columns)
{
Query.Clause.OrderBy = this;
CheckNullOrEmptyAndThrow(Argc(() => columns, columns));
Query.AddArguments(columns);
Build = (buildContext, buildArgs) =>
{
var sql = Text.GenerateSql(100)
.NewLine(Text.OrderBy).S()
.Append(OrderingArgument.Concatenate(columns, buildContext, buildArgs, false))
.ToString();
TryThrow(buildContext);
return(sql);
};
}
