/// <summary>
/// Copy constructor for an IndexLookupRecord.
/// </summary>
/// <param name="record">
/// The record to copy.
/// </param>
public IndexLookupRecord(IIndexLookupRecord record)
{
IndexLookupRecord thatRecord = (IndexLookupRecord)record;
m_sExtractor = thatRecord.ExtractorDescription;
m_sIndex = thatRecord.IndexDescription;
m_fOrdered = thatRecord.IsOrdered;
m_cBytes = thatRecord.MemoryUsage;
m_cDistinctValues = thatRecord.Size;
m_sIndexDef = thatRecord.IndexDef;
}
/// <summary>
/// Checks two cache entries for equality.
/// </summary>
/// <param name="obj">
/// The <b>IndexLookupRecord</b> to compare to.
/// </param>
/// <returns>
/// <b>true</b> if this <b>IndexLookupRecord</b> and the passed object are
/// equivalent.
/// </returns>
public override bool Equals(object obj)
{
if (this == obj)
{
return(true);
}
// Note: IndexLookupRecords are considered equivalent based on
// the definition of the indices and not varying factors
// such as index footprint and size.
IndexLookupRecord that = obj as IndexLookupRecord;
return(that != null &&
m_fOrdered == that.m_fOrdered &&
Equals(m_sIndexDef, that.m_sIndexDef) &&
m_sExtractor.Equals(that.m_sExtractor));
}
/// <summary>
/// Merge the given step with this one. This method assumes that
/// the given step matches with this one.
/// </summary>
/// <param name="step">
/// The <b>IStep</b> to merge.
/// </param>
public void Merge(IStep step)
{
m_nSizeIn += step.PreFilterKeySetSize;
m_nSizeOut += step.PostFilterKeySetSize;
m_nEfficiency += step.Efficiency;
m_cMillis += step.Duration;
IDictionary <IndexLookupRecord, IndexLookupRecord> dictIndexRecords =
new Dictionary <IndexLookupRecord, IndexLookupRecord>();
foreach (IndexLookupRecord record in step.IndexLookupRecords)
{
dictIndexRecords.Add(record, record);
}
foreach (IndexLookupRecord indexLookupRecord in m_setIndexLookupRecords)
{
IndexLookupRecord record = dictIndexRecords[indexLookupRecord];
if (record != null && record.IndexDescription != null)
{
indexLookupRecord.MemoryUsage += record.MemoryUsage;
indexLookupRecord.Size = Math.Max(indexLookupRecord.Size, record.Size);
indexLookupRecord.IndexDescription = indexLookupRecord.BuildIndexDescription();
}
}
IList listSteps = step.Steps;
int i = 0;
foreach (Step subStep in m_listSubSteps)
{
subStep.Merge((IStep)listSteps[i++]);
}
}
