public AggregationProjectionSegment(int startIndex, int stopIndex, AggregationTypeEnum type, int innerExpressionStartIndex)
{
_startIndex = startIndex;
_stopIndex = stopIndex;
_type = type;
_innerExpressionStartIndex = innerExpressionStartIndex;
}
public AggregationDistinctProjection(int startIndex, int stopIndex, AggregationTypeEnum type, string innerExpression, string alias, string distinctInnerExpression)
: base(type, innerExpression, alias)
{
StartIndex = startIndex;
StopIndex = stopIndex;
_distinctInnerExpression = distinctInnerExpression;
}
public Output(string Description = "", string Unit = "", double Scale = 1, AggregationTypeEnum AggregationType = AggregationTypeEnum.Mean, AggregationSequenceEnum AggregationSequence = AggregationSequenceEnum.Always)
{
this.Description = Description;
this.Unit = Unit;
this.Scale = Scale;
this.AggregationType = AggregationType;
this.AggregationSequence = AggregationSequence;
}
private IASTNode CreateAggregationSegment(MySqlCommandParser.AggregationFunctionContext ctx, String aggregationType)
{
AggregationTypeEnum type = AggregationType.ValueOf(aggregationType.ToUpper());
int innerExpressionStartIndex = ((ITerminalNode)ctx.GetChild(1)).Symbol.StartIndex;
if (null == ctx.distinct())
{
return(new AggregationProjectionSegment(ctx.Start.StartIndex, ctx.Stop.StopIndex, type, innerExpressionStartIndex));
}
return(new AggregationDistinctProjectionSegment(ctx.Start.StartIndex, ctx.Stop.StopIndex, type, innerExpressionStartIndex, getDistinctExpression(ctx)));
}
/**
* Create aggregation unit instance.
*
* @param type aggregation function type
* @param isDistinct is distinct
* @return aggregation unit instance
*/
public static IAggregationUnit Create(AggregationTypeEnum type, bool isDistinct)
{
switch (type)
{
case AggregationTypeEnum.MAX:
return(new ComparableAggregationUnit(false));
case AggregationTypeEnum.MIN:
return(new ComparableAggregationUnit(true));
case AggregationTypeEnum.SUM:
return(GetSumAggregationUnit(isDistinct));
case AggregationTypeEnum.COUNT:
return(GetCountAggregationUnit(isDistinct));
case AggregationTypeEnum.AVG:
return(GetAvgAggregationUnit(isDistinct));
default:
throw new NotSupportedException(type.ToString());
}
}
public AggregationDistinctProjectionSegment(int startIndex, int stopIndex, AggregationTypeEnum type, int innerExpressionStartIndex, string distinctExpression) : base(startIndex, stopIndex, type, innerExpressionStartIndex)
{
this._distinctExpression = SqlUtil.GetExpressionWithoutOutsideParentheses(distinctExpression);
}
public AggregationProjection(AggregationTypeEnum type, string innerExpression, string @alias)
{
_type = type;
_innerExpression = innerExpression;
_alias = alias;
}
