public ObjectExecution(
Select query,
@SuppressWarnings("unused") RuntimeMetadata metadata,
ObjectExecutionFactory factory,
ObjectConnection connection,
ExecutionContext executionContext)
throws TranslatorException {
this.factory = factory;
this.query = query;
this.connection = connection;
this.executionContext = executionContext;
projects = new ArrayList<CompiledScript>(query.getDerivedColumns().size());
for (DerivedColumn dc : query.getDerivedColumns()) {
ColumnReference cr = (ColumnReference) dc.getExpression();
String name = null;
if (cr.getMetadataObject() != null) {
Column c = cr.getMetadataObject();
name = getNameInSource(c);
} else {
name = cr.getName();
}
if (name.equalsIgnoreCase("this")) { // $NON-NLS-1$
projects.add(null);
} else {
try {
projects.add(scriptEngine.compile(OBJECT_NAME + "." + name)); // $NON-NLS-1$
} catch (ScriptException e) {
throw new TranslatorException(e);
}
}
}
}
@Override
public void visit(Select obj) {
visitNodes(obj.getFrom());
visitNodes(obj.getDerivedColumns());
visitNode(obj.getWhere());
visitNode(obj.getGroupBy());
visitNode(obj.getHaving());
visitNode(obj.getOrderBy());
visitNode(obj.getLimit());
if (this.doScanEvaluation) {
HashMap<String, String> options =
buildTableMetadata(
this.scanTable.getName(), this.scanTable.getColumns(), this.ef.getEncoding());
options.put(EvaluatorIterator.QUERYSTRING, SQLStringVisitor.getSQLString(obj.getWhere()));
IteratorSetting it = new IteratorSetting(1, EvaluatorIterator.class, options);
this.scanIterators.add(it);
}
if (this.selectColumns.size() < this.scanTable.getColumns().size()) {
HashMap<String, String> options =
buildTableMetadata(this.scanTable.getName(), this.selectColumns, this.ef.getEncoding());
IteratorSetting it =
new IteratorSetting(iteratorPriority++, LimitProjectionIterator.class, options);
this.scanIterators.add(it);
}
}