private void closeStatement() {
if (curStatement != null) {
for (DBCResultSet resultSet : curResultSets) {
resultSet.close();
}
curResultSets.clear();
try {
curStatement.close();
} catch (Throwable e) {
log.error("Error closing statement", e);
}
curStatement = null;
}
}
@Override
public void fetchStart(
DBCSession session, final DBCResultSet resultSet, long offset, long maxRows)
throws DBCException {
this.rows.clear();
this.offset = offset;
this.maxRows = maxRows;
if (!nextSegmentRead) {
// Get columns metadata
DBCResultSetMetaData metaData = resultSet.getMeta();
List<DBCAttributeMetaData> rsAttributes = metaData.getAttributes();
columnsCount = rsAttributes.size();
// Extract column info
metaColumns = new DBDAttributeBindingMeta[columnsCount];
for (int i = 0; i < columnsCount; i++) {
metaColumns[i] = DBUtils.getAttributeBinding(session, rsAttributes.get(i));
}
resultSetViewer.setMetaData(metaColumns);
}
}
private boolean fetchQueryData(
DBCSession session,
DBCResultSet resultSet,
SQLQueryResult result,
DBDDataReceiver dataReceiver,
boolean updateStatistics)
throws DBCException {
if (dataReceiver == null) {
// No data pump - skip fetching stage
return false;
}
if (resultSet == null) {
return false;
}
boolean keepCursor = keepStatementOpen();
if (keepCursor) {
curResultSets.add(resultSet);
}
DBRProgressMonitor monitor = session.getProgressMonitor();
monitor.subTask("Fetch result set");
long rowCount = 0;
dataReceiver.fetchStart(session, resultSet, rsOffset, rsMaxRows);
try {
// Retrieve source entity
if (result != null) {
DBCResultSetMetaData rsMeta = resultSet.getMeta();
String sourceName = null; // resultSet.getResultSetName();
for (DBCAttributeMetaData attr : rsMeta.getAttributes()) {
String entityName = attr.getEntityName();
if (!CommonUtils.isEmpty(entityName)) {
if (sourceName == null) {
sourceName = entityName;
} else if (!sourceName.equals(entityName)) {
// Multiple source entities
sourceName += "(+)";
break;
}
}
}
/*
if (CommonUtils.isEmpty(sourceName)) {
try {
sourceName = resultSet.getResultSetName();
} catch (DBCException e) {
log.debug(e);
}
}
*/
if (CommonUtils.isEmpty(sourceName)) {
sourceName = "Result";
}
result.setResultSetName(sourceName);
}
long fetchStartTime = System.currentTimeMillis();
// Fetch all rows
while ((!hasLimits() || rowCount < rsMaxRows) && resultSet.nextRow()) {
if (monitor.isCanceled()) {
break;
}
rowCount++;
if (rowCount > 0 && rowCount % 100 == 0) {
monitor.subTask(rowCount + " rows fetched");
monitor.worked(100);
}
dataReceiver.fetchRow(session, resultSet);
}
if (updateStatistics) {
statistics.addFetchTime(System.currentTimeMillis() - fetchStartTime);
}
} finally {
if (!keepCursor) {
try {
resultSet.close();
} catch (Throwable e) {
log.error("Error while closing resultset", e);
}
}
try {
dataReceiver.fetchEnd(session, resultSet);
} catch (Throwable e) {
log.error("Error while handling end of result set fetch", e);
}
dataReceiver.close();
}
if (result != null) {
result.setRowCount(rowCount);
}
if (updateStatistics) {
statistics.setRowsFetched(rowCount);
}
monitor.subTask(rowCount + " rows fetched");
return true;
}