private DiscrepancyType InitialMatch(TableData[] datas, DiscrepancyOutputter outputter)
{
string query = BuildOnlyMatchableRowsQuiery();
MatchedRecordComparer comparer = new MatchedRecordComparer(data, settings, outputter);
Recordset matches = db.QueryResult(query);
DiscrepancyType result = DiscrepancyType.NONE;
while (matches.Read())
{
string[] matchedRecord = new string[matches.GetFieldCount() - HASH_FIELDS_COUNT];
int nextIndexToWrite = 0;
for (int i = 0; i < matches.GetFieldCount(); i++)
{
// Skip hash fields.
if (i == HASH_FIELD_INDEX || i == datas[0].columnCount + 2)
{
continue;
}
matchedRecord[nextIndexToWrite++] = matches.GetString(i);
}
string[] first, second;
ExtractRecords(matchedRecord, datas[0].columnCount + 1, datas[1].columnCount + 1, out first, out second);
DiscrepancyType type = comparer.Compare(first, second);
if (type > result)
{
result = type;
}
}
matches.Close();
return(result);
}
public string[][] Match(TableData[] datas, MatchedRecordComparer comparer, DiscrepancyOutputter outputter)
{
List <string[]> result = new List <string[]>();
// Extract nonmatching records.
Dictionary <string, List <string[]> > firstRecords;
Dictionary <string, List <string[]> > secondRecords;
ExtractRecords(out firstRecords, out secondRecords);
if (firstRecords.Count != 0 || secondRecords.Count != 0)
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Warning: Not enough key columns. Experimental algorithm is turned on.");
Console.WriteLine("First records: ");
foreach (KeyValuePair <string, List <string[]> > pair in firstRecords)
{
Console.WriteLine("Hash:");
foreach (string[] record in pair.Value)
{
for (int i = 0; i < record.Length; i++)
{
Console.Write(record[i] + ", ");
}
Console.WriteLine();
}
}
Console.WriteLine("Second records: ");
foreach (KeyValuePair <string, List <string[]> > pair in secondRecords)
{
Console.WriteLine("Hash:");
foreach (string[] record in pair.Value)
{
for (int i = 0; i < record.Length; i++)
{
Console.Write(record[i] + ", ");
}
Console.WriteLine();
}
}
Console.ResetColor();
}
foreach (KeyValuePair <string, List <string[]> > pairOne in firstRecords)
{
foreach (KeyValuePair <string, List <string[]> > pairTwo in secondRecords)
{
// Comparing records with same hash at the moment.
if (pairOne.Key.Equals(pairTwo.Key))
{
MatchRecords(pairOne.Value.ToArray(), pairTwo.Value.ToArray(), comparer, outputter);
}
}
}
return(result.ToArray());
}
private void MatchRecords(string[][] recordSetOne, string[][] recordSetTwo, MatchedRecordComparer comparer, DiscrepancyOutputter outputter)
{
HashSet <string> checkedIndices = new HashSet <string>();
for (int i = 0; i < recordSetOne.Length; i++)
{
string[] recordOne = recordSetOne[i];
string[] bestMatch = null;
double smallestDelta = double.MaxValue;
for (int j = 0; j < recordSetTwo.Length; j++)
{
string[] recordTwo = recordSetTwo[j];
if (checkedIndices.Contains(recordTwo[1]))
{
continue;
}
double delta = CalculateGreatestDelta(recordOne, recordTwo);
if (delta < smallestDelta)
{
bestMatch = recordTwo;
smallestDelta = delta;
}
}
if (bestMatch != null)
{
checkedIndices.Add(bestMatch[1]);
string[] recordOneNoHash = RemoveHashFromRecord(recordOne);
string[] recordTwoNoHash = RemoveHashFromRecord(bestMatch);
int recordColumnCount = Math.Min(recordOneNoHash.Length, recordTwoNoHash.Length);
string[] newOne = new string[recordColumnCount];
string[] newTwo = new string[recordColumnCount];
Array.Copy(recordOneNoHash, newOne, recordColumnCount);
Array.Copy(recordTwoNoHash, newTwo, recordColumnCount);
comparer.Compare(newOne, newTwo);
}
}
// Print missing.
for (int i = 0; i < recordSetTwo.Length; i++)
{
if (!checkedIndices.Contains(recordSetTwo[i][1]))
{
outputter.MissingRecord(RemoveHashFromRecord(recordSetTwo[i]), 0);
}
}
checkedIndices.Clear();
}
private DiscrepancyType AdditionalMatch(TableData[] datas, DiscrepancyOutputter outputter)
{
DiscrepancyType result = DiscrepancyType.NONE;
MatchedRecordComparer comparer = new MatchedRecordComparer(data, settings, outputter);
AdditionalSQLHashRecordMatcher matcher = new AdditionalSQLHashRecordMatcher(srcTables, data, db);
matcher.Match(datas, comparer, outputter);
return(result);
}