public ResultSet drillthrough(
String queryName, List<Integer> cellPosition, Integer maxrows, String returns) {
OlapStatement stmt = null;
try {
IQuery query = getIQuery(queryName);
CellSet cs = query.getCellset();
SaikuCube cube = getQuery(queryName).getCube();
final OlapConnection con = olapDiscoverService.getNativeConnection(cube.getConnectionName());
stmt = con.createStatement();
String select = null;
StringBuffer buf = new StringBuffer();
buf.append("SELECT (");
for (int i = 0; i < cellPosition.size(); i++) {
List<Member> members =
cs.getAxes().get(i).getPositions().get(cellPosition.get(i)).getMembers();
for (int k = 0; k < members.size(); k++) {
Member m = members.get(k);
if (k > 0 || i > 0) {
buf.append(", ");
}
buf.append(m.getUniqueName());
}
}
buf.append(") ON COLUMNS \r\n");
buf.append("FROM " + cube.getCubeName() + "\r\n");
SelectNode sn = (new DefaultMdxParserImpl().parseSelect(getMDXQuery(queryName)));
final Writer writer = new StringWriter();
sn.getFilterAxis().unparse(new ParseTreeWriter(new PrintWriter(writer)));
if (StringUtils.isNotBlank(writer.toString())) {
buf.append("WHERE " + writer.toString());
}
select = buf.toString();
if (maxrows > 0) {
select = "DRILLTHROUGH MAXROWS " + maxrows + " " + select + "\r\n";
} else {
select = "DRILLTHROUGH " + select + "\r\n";
}
if (StringUtils.isNotBlank(returns)) {
select += "\r\n RETURN " + returns;
}
log.debug("Drill Through for query (" + queryName + ") : \r\n" + select);
ResultSet rs = stmt.executeQuery(select);
return rs;
} catch (Exception e) {
throw new SaikuServiceException("Error DRILLTHROUGH: " + queryName, e);
} finally {
try {
if (stmt != null) stmt.close();
} catch (Exception e) {
}
}
}
public SelectNode apply(SelectNode sn) {
// do a deep copy of the existing query SelectNode before
// modifying it:
SelectNode newSelectNode = sn.deepCopy();
for (AxisNode an : newSelectNode.getAxisList()) {
if (an.getAxis() == axis) {
// this is the axis we're drilling
ParseTreeNode initialAxisExp = an.getExpression();
// apply the drill operation
ParseTreeNode newAxisExp = processAxisExp(initialAxisExp);
// replace the expression in the axis by the new generated one
an.setExpression(newAxisExp);
}
}
return newSelectNode;
}
