/* currently only handles integer comparisons */
public void open(DataTable data)
{
if (!m_groupby)
{
/* bulk count on the field specified */
/* need to put in distinct test here */
DataColumn cntCol = null;
if (!m_cntfield)
{
cntCol = new DataColumn("count(*)", System.Type.GetType("System.Int32"));
}
else
{
cntCol = new DataColumn("count(" + m_field + ")", System.Type.GetType("System.Int32"));
}
/* just counting the number of rows */
m_cnt = data.Rows.Count;
m_results.Columns.Add(cntCol);
List <int> value = new List <int>();
value.Add(m_cnt);
m_results.Rows.Add(value.ToArray()[0]);
}
else
{
/* pack them into bins and calculate for the bins */
/* track bins we have so far */
Dictionary <string, int> bins = new Dictionary <string, int>();
int valueIndex = data.Columns.IndexOf(m_field);
int groupIndex = data.Columns.IndexOf(m_grouping);
/* build result relation */
/* m_grouping | count | sum | average */
/* the counts and sum are all floats to handle any case where it's a value */
DataColumn groupCol = new DataColumn(m_grouping, System.Type.GetType("System.String"));
StringBuilder sb = new StringBuilder();
sb.Append("count(");
if (m_distinct)
{
sb.Append("distinct ");
}
sb.Append(m_field);
sb.Append(")");
/* should make it a double; but this is to simplify other pieces */
DataColumn countCol = new DataColumn(sb.ToString(), System.Type.GetType("System.Int32"));
m_results.Columns.Add(groupCol);
m_results.Columns.Add(countCol);
/* end build result table */
/* to handle distinct */
List <string> valuesSeen = new List <string>();
int printBinUpdates = 0;
string userAggregateInput = string.Empty;
userAggregateInput = this.m_form.GetUserAggregateInput();
/* note even if the userAggregateInput is invalid it will correctly fill */
List <DataRow> completeRows = new List <DataRow>();
if (userAggregateInput.CompareTo(string.Empty) == 0)
{
DataRow[] rows = new DataRow[data.Rows.Count];
data.Rows.CopyTo(rows, 0);
completeRows.AddRange(rows);
}
else
{
/* will this not work with integers */
DataRow[] rows = data.Select(this.m_grouping + " = '" + userAggregateInput + "'");
completeRows.AddRange(rows);
DataRow[] other = data.Select(this.m_grouping + " <> '" + userAggregateInput + "'");
completeRows.AddRange(other);
}
/* begin parsing data */
while (data.Rows.Count > 0)
{
/* user has specified new input */
if (userAggregateInput.CompareTo(this.m_form.GetUserAggregateInput()) != 0)
{
completeRows.Clear();
userAggregateInput = this.m_form.GetUserAggregateInput();
DataRow[] rows = data.Select(this.m_grouping + " = '" + userAggregateInput + "'");
completeRows.AddRange(rows);
DataRow[] other = data.Select(this.m_grouping + " <> '" + userAggregateInput + "'");
completeRows.AddRange(other);
}
DataRow dr = completeRows[0];
Object[] obs = dr.ItemArray;
object value = obs[valueIndex];
string group = (string)obs[groupIndex];
/* we have this group */
if (bins.ContainsKey(group))
{
Boolean distinct_add = true;
if (m_distinct)
{
/* we care about distinct and we've seen this before */
if (valuesSeen.Contains(group.ToString() + value.ToString()))
{
distinct_add = false;
}
}
if (distinct_add)
{
int seekIndex;
/* we have a bin for this group */
bins.TryGetValue(group, out seekIndex);
Object[] obsInTable = m_results.Rows[seekIndex].ItemArray;
/* get current values in group */
int currentCount = (int)obsInTable[1];
currentCount++;
/* should only return 1 item because we only have 1 row per group */
DataRow[] editRow = m_results.Select(m_grouping + " = '" + group + "'");
editRow[0][countCol] = currentCount;
}
}
else
{
/* this is first time we've seen group */
bins.Add(group, m_results.Rows.Count);
/* add it to distinct filter (regardless if we care */
valuesSeen.Add(group.ToString() + value.ToString());
/* set values for m_results */
DataRow newRow = m_results.NewRow();
newRow[0] = group;
newRow[1] = 1;
m_results.Rows.Add(newRow);
} /* end if bins.ContainsKey(group) */
data.Rows.Remove(dr);
completeRows.RemoveAt(0);
System.Threading.Thread.Sleep(this.m_form.GetUserPause());
printBinUpdates++;
if (printBinUpdates == 5)
{
Aux.printUpdates(m_results);
printBinUpdates = 0;
m_update = m_results.Copy();
this.m_form.SetText("Aggregate Update");
this.m_form.SetDataView(m_update);
}
} /* for each tuple */
} /* end if group by */
}
/* currently only handles integer comparisons */
public void open(DataTable data)
{
if (!m_groupby)
{
StringBuilder sb = new StringBuilder();
sb.Append("sum(");
sb.Append(m_field);
sb.Append(")");
DataColumn sumCol = new DataColumn(sb.ToString(), System.Type.GetType("System.Int32"));
m_results.Columns.Add(sumCol);
/* bulk average on the field specified */
int sum = 0;
int columnIndex = data.Columns.IndexOf(m_field);
/* need to calculate sum of all for that field specified */
foreach (DataRow dr in data.Rows)
{
/* grab value of field and add to sum */
Object[] obs = dr.ItemArray;
sum += (int)obs[columnIndex];
}
List <int> value = new List <int>();
value.Add(sum);
m_results.Rows.Add(value.ToArray()[0]);
}
else
{
/* pack them into bins and calculate for the bins */
/* track bins we have so far */
Dictionary <string, int> bins = new Dictionary <string, int>();
/* columns indices we care about from input */
int valueIndex = data.Columns.IndexOf(m_field);
int groupIndex = data.Columns.IndexOf(m_grouping);
/* build result relation */
/* m_grouping | sum */
/* the counts and sum are all floats to handle any case where it's a value */
DataColumn groupCol = new DataColumn(m_grouping, System.Type.GetType("System.String"));
StringBuilder sb = new StringBuilder();
sb.Append("sum(");
sb.Append(m_field);
sb.Append(")");
DataColumn sumCol = new DataColumn(sb.ToString(), System.Type.GetType("System.Int32"));
m_results.Columns.Add(groupCol);
m_results.Columns.Add(sumCol);
/* end build result table */
int printBinsCounter = 0;
string userAggregateInput = string.Empty;
userAggregateInput = this.m_form.GetUserAggregateInput();
/* note even if the userAggregateInput is invalid it will correctly fill */
List <DataRow> completeRows = new List <DataRow>();
if (userAggregateInput.CompareTo(string.Empty) == 0)
{
DataRow[] rows = new DataRow[data.Rows.Count];
data.Rows.CopyTo(rows, 0);
completeRows.AddRange(rows);
}
else
{
DataRow[] rows = data.Select(this.m_grouping + " = '" + userAggregateInput + "'");
completeRows.AddRange(rows);
DataRow[] other = data.Select(this.m_grouping + " <> '" + userAggregateInput + "'");
completeRows.AddRange(other);
}
/* begin parsing data */
while (data.Rows.Count > 0)
{
/* user has specified new input */
if (userAggregateInput.CompareTo(this.m_form.GetUserAggregateInput()) != 0)
{
completeRows.Clear();
userAggregateInput = this.m_form.GetUserAggregateInput();
DataRow[] rows = data.Select(this.m_grouping + " = '" + userAggregateInput + "'");
completeRows.AddRange(rows);
DataRow[] other = data.Select(this.m_grouping + " <> '" + userAggregateInput + "'");
completeRows.AddRange(other);
}
DataRow dr = completeRows[0];
Object[] obs = dr.ItemArray;
int value = (int)obs[valueIndex];
string group = (string)obs[groupIndex];
/* we have this group */
if (bins.ContainsKey(group))
{
int seekIndex;
/* we have a bin for this group */
bins.TryGetValue(group, out seekIndex);
Object[] obsInTable = m_results.Rows[seekIndex].ItemArray;
/* get current values in group */
int currentSum = (int)obsInTable[1];
currentSum += value;
/* should only return 1 item because we only have 1 row per group */
DataRow[] editRow = m_results.Select(m_grouping + " = '" + group + "'");
editRow[0][sumCol] = currentSum;
}
else
{
bins.Add(group, m_results.Rows.Count);
/* set values for m_results */
DataRow newRow = m_results.NewRow();
newRow[groupCol] = group;
newRow[sumCol] = value;
m_results.Rows.Add(newRow);
}
data.Rows.Remove(dr);
completeRows.RemoveAt(0);
System.Threading.Thread.Sleep(this.m_form.GetUserPause());
printBinsCounter++;
/* prints every five rows */
if (printBinsCounter == 3)
{
Aux.printUpdates(m_results);
printBinsCounter = 0;
m_update = m_results.Copy();
this.m_form.SetText("Aggregate Update");
this.m_form.SetDataView(m_update);
}
} /* end for each tuple in input */
} /* end (m_groupby) */
}