/// <summary>
/// Read in data, pivot & buffer for supplied set of rows.
/// This is called for retrieval only, not for search
/// </summary>
/// <param name="eqp"></param>
public override void ExecuteQuery(
ExecuteQueryParms eqp)
{
DbCommandMx drd;
int rowsFetched = 0, vosCreated = 0;
MetaTable mt;
MetaColumn mc = null;
DateTime dt;
PivotMetaBroker mb;
List <GenericMetaBroker> mbList;
string cid, pivotKey, tableFilter, s, txt, tok;
int fci, mci, pvi, pci, si, i1;
object[] vo = null;
object o;
if (!PivotInCode) // let Oracle do the pivoting?
{
base.ExecuteQuery(eqp);
return;
}
// Self-pivot. Read & buffer data for all query tables from same Source/TableFilterColumns for key set if we are the first table for Source
int t0 = TimeOfDay.Milliseconds();
Dictionary <string, MultiTablePivotBrokerTypeData> mbsi = eqp.Qe.MetaBrokerStateInfo;
mt = eqp.QueryTable.MetaTable;
string sourceKey = mt.TableMap + "," + Csv.JoinCsvString(mt.TableFilterColumns); // grouping based on source sql
MultiTablePivotBrokerTypeData mpd = (MultiTablePivotBrokerTypeData)mbsi[sourceKey];
if (mpd.FirstTableName != mt.Name)
{
return; // retrieve data for all tables when we see first table
}
mpd.ClearBuffers();
// Build sql
StringBuilder sb = new StringBuilder(); // build filter to select for desired metatable
tableFilter = "";
if (mt.TableFilterColumns.Count == 1)
{ // build single in list if single filter column
foreach (string mtName in mpd.MbInstances.Keys)
{
mt = MetaTableCollection.Get(mtName);
if (sb.Length > 0)
{
sb.Append(",");
}
sb.Append(mt.TableFilterValues[0]);
tableFilter = mt.TableFilterColumns[0] + " in (" + sb.ToString() + ")";
}
}
else // multiple table filter columns, build and/or expressions
{
foreach (string mtName in mpd.MbInstances.Keys)
{
mt = MetaTableCollection.Get(mtName);
if (sb.Length > 0)
{
sb.Append(" or ");
}
tableFilter = "(" + GetTableFilterCriteria(mt) + ")";
sb.Append(tableFilter);
}
tableFilter = "(" + sb.ToString() + ")";
}
string sql = "select * from " + mt.TableMap + " where ";
if (tableFilter != "")
{
sql += tableFilter + " and ";
}
sql += mt.KeyMetaColumn.ColumnMap + " in (<list>) ";
// Read unpivoted data, merge/pivot & buffer pivoted rows
List <string> keySubset = eqp.SearchKeySubset;
if (keySubset == null)
{
keySubset = GetPreviewSubset(); // assume previewing of single table if no subset
}
List <string> parmList = new List <string>();
for (i1 = 0; i1 < keySubset.Count; i1++) // copy keys to parameter array properly normalized
{
string key = CompoundId.NormalizeForDatabase((string)keySubset[i1], Qt.MetaTable);
if (key != null)
{
parmList.Add(key);
}
}
drd = new DbCommandMx();
drd.PrepareListReader(sql, DbType.String);
drd.ExecuteListReader(parmList);
while (drd.Read())
{
rowsFetched++;
string tableFilterKey = ""; // get column values to identify table
for (fci = 0; fci < mt.TableFilterColumns.Count; fci++)
{
o = drd.GetObjectByName(mt.TableFilterColumns[fci]);
if (o == null)
{
s = "";
}
else
{
s = o.ToString();
}
if (tableFilterKey != "")
{
tableFilterKey += ", ";
}
tableFilterKey += s;
}
mt = mpd.TableFilterValuesToMetaTableDict[tableFilterKey];
if (mt == null)
{
continue; // continue if don't know about this table
}
if (!mpd.MbInstances.ContainsKey(mt.Name))
{
continue; // have row hash for broker?
}
int mbIdx = 0;
mb = (PivotMetaBroker)mpd.GetFirstBroker(mt.Name, out mbList);
while (true) // copy out for each metabroker
{
mt = mb.Qt.MetaTable;
if (mt == null)
{
continue;
}
if (mb.MultipivotRowDict == null)
{
mb.MultipivotRowDict = new Dictionary <string, object[]>();
}
string rowKey = "";
for (mci = 0; mci < mt.PivotMergeColumns.Count; mci++)
{
o = drd.GetObjectByName(mt.PivotMergeColumns[mci]);
if (o == null)
{
s = "<null>";
}
else
{
s = o.ToString();
}
rowKey += "<" + s + ">";
}
if (mb.MultipivotRowDict.ContainsKey(rowKey)) // have entry for row?
{
vo = (object[])mb.MultipivotRowDict[rowKey];
}
else // new row, create vo for it & fill in merged column values
{
vo = new Object[mb.SelectList.Count];
for (si = 0; si < mb.SelectList.Count; si++) // transfer non-pivoted values
{
mc = mb.SelectList[si];
if (mc.PivotValues != null)
{
continue; // skip pivoted cols for now
}
for (mci = 0; mci < mt.PivotMergeColumns.Count; mci++)
{
if (Lex.Eq(mc.ColumnMap, mt.PivotMergeColumns[mci]))
{
o = drd.GetObjectByName(mt.PivotMergeColumns[mci]);
if (mc.IsKey) // normalize cid adding prefix as needed
{
o = CompoundId.Normalize(o.ToString(), mt);
}
vo[si] = o;
break;
}
}
}
mb.MultipivotRowDict[rowKey] = vo;
vosCreated++;
}
// Pivot out data based on pivot column values
if (mb.PivotKeys == null)
{ // build set of pivot keys for the pivoted columns in the table if not done yet
mb.PivotKeys = new string[mb.SelectList.Count];
for (si = 0; si < mb.SelectList.Count; si++)
{
mc = mb.SelectList[si];
if (mc.PivotValues == null)
{
continue; // skip non-pivoted cols
}
pivotKey = "";
for (pvi = 0; pvi < mc.PivotValues.Count; pvi++)
{
pivotKey += "<" + mc.PivotValues[pvi].ToLower() + ">";
}
mb.PivotKeys[si] = pivotKey;
}
}
pivotKey = "";
for (pci = 0; pci < mt.PivotColumns.Count; pci++)
{ // build pivot key for this unpivoted row
o = drd.GetObjectByName(mt.PivotColumns[pci]);
if (o == null)
{
s = "<null>";
}
else
{
s = o.ToString().ToLower();
}
pivotKey += "<" + s + ">";
}
for (si = 0; si < mb.SelectList.Count; si++) // transfer pivoted values
{
if (mb.PivotKeys[si] == null || // skip non-pivoted cols
pivotKey != mb.PivotKeys[si])
{
continue; // and non-matches
}
mc = mb.SelectList[si];
int ci = drd.Rdr.GetOrdinal(mc.ColumnMap);
if (mc.DataType == MetaColumnType.Integer)
{
if (!mc.DetailsAvailable) // simple scalar value
{
vo[si] = drd.GetInt(ci);
}
else // value with possible resultId, linking information
{
txt = drd.GetString(ci); // todo: fix for annotation
vo[si] = QueryEngine.ParseScalarValue(txt, Qt, mc);
}
}
else if (mc.DataType == MetaColumnType.Number)
{
if (!mc.DetailsAvailable) // simple scalar value
{
vo[si] = drd.GetDouble(ci);
}
else // value with possible resultId, linking information
{
txt = Dr.GetString(ci); // todo: fix for annotation
vo[si] = QueryEngine.ParseScalarValue(txt, Qt, mc);
}
}
else if (mc.DataType == MetaColumnType.QualifiedNo)
{
// todo
}
else if (mc.DataType == MetaColumnType.String)
{
if (!mc.DetailsAvailable)
{
vo[si] = drd.GetString(ci);
}
else // value with possible resultId, linking information
{
txt = Dr.GetString(ci); // todo: fix for annotation
vo[si] = QueryEngine.ParseScalarValue(txt, Qt, mc);
}
}
else if (mc.DataType == MetaColumnType.Date)
{
if (!mc.DetailsAvailable) // simple scalar value
{
vo[si] = drd.GetDateTime(ci);
}
else // value with possible resultId, linking information
{
txt = Dr.GetString(ci); // todo: fix for annotation
vo[si] = QueryEngine.ParseScalarValue(txt, Qt, mc);
}
}
else if (mc.DataType == MetaColumnType.Structure)
{ // structures come in as compound identifiers (todo: fix for annotation)
tok = Dr.GetValue(si).ToString();
cid = CompoundId.Normalize(tok, Qt.MetaTable);
vo[si] = cid;
}
else if (mc.DataType == MetaColumnType.MolFormula)
{
vo[si] = drd.GetString(ci);
}
else if (mc.DataType == MetaColumnType.DictionaryId)
{
try // Id may be string or integer value
{ vo[si] = drd.GetString(ci); }
catch (Exception ex)
{ vo[si] = drd.GetInt(ci); }
}
else if (mc.DataType == MetaColumnType.Image)
{
try // Id may be string or integer value
{ vo[si] = drd.GetString(ci); }
catch (Exception ex)
{ vo[si] = drd.GetInt(ci); }
}
else if (mc.DataType == MetaColumnType.Hyperlink)
{
txt = drd.GetString(ci);
Hyperlink hlink = new Hyperlink();
vo[si] = hlink;
hlink.Text = txt;
}
}
if (mbList == null)
{
break; // single broker
}
mbIdx++; // go to next broker
if (mbIdx >= mbList.Count)
{
break; // at end of brokers?
}
mb = (PivotMetaBroker)mbList[mbIdx];
} // end of broker loop
} // end of read loop
drd.Dispose();
return;
}