Reduce unnecessary initialization (#1682)

server/src/main/java/org/apache/iotdb/db/query/dataset/groupby/GroupByFillDataSet.java

@@ -25,7 +25,6 @@ import java.util.List;
 import java.util.Map;
 import org.apache.iotdb.db.conf.IoTDBDescriptor;
 import org.apache.iotdb.db.exception.StorageEngineException;
-import org.apache.iotdb.db.exception.metadata.IllegalPathException;
 import org.apache.iotdb.db.exception.query.QueryProcessException;
 import org.apache.iotdb.db.metadata.PartialPath;
 import org.apache.iotdb.db.qp.physical.crud.GroupByTimeFillPlan;
@@ -92,13 +91,9 @@ public class GroupByFillDataSet extends QueryDataSet {
     Arrays.fill(lastTimeArray, Long.MAX_VALUE);
     for (int i = 0; i < paths.size(); i++) {
       TimeValuePair lastTimeValuePair;
-      try {
-        lastTimeValuePair = LastQueryExecutor.calculateLastPairForOneSeriesLocally(
-            new PartialPath(paths.get(i).getFullPath()), dataTypes.get(i), context,
-            groupByFillPlan.getAllMeasurementsInDevice(paths.get(i).getDevice()));
-      } catch (IllegalPathException e) {
-        throw new QueryProcessException(e.getMessage());
-      }
+      lastTimeValuePair = LastQueryExecutor.calculateLastPairForOneSeriesLocally(
+          (PartialPath) paths.get(i), dataTypes.get(i), context,
+          groupByFillPlan.getAllMeasurementsInDevice(paths.get(i).getDevice()));
       if (lastTimeValuePair.getValue() != null) {
         lastTimeArray[i] = lastTimeValuePair.getTimestamp();
       }

server/src/main/java/org/apache/iotdb/db/query/executor/LastQueryExecutor.java

@@ -30,7 +30,6 @@ import java.util.Set;
 import org.apache.iotdb.db.engine.querycontext.QueryDataSource;
 import org.apache.iotdb.db.engine.storagegroup.TsFileResource;
 import org.apache.iotdb.db.exception.StorageEngineException;
-import org.apache.iotdb.db.exception.metadata.IllegalPathException;
 import org.apache.iotdb.db.exception.metadata.MetadataException;
 import org.apache.iotdb.db.exception.query.QueryProcessException;
 import org.apache.iotdb.db.metadata.PartialPath;
@@ -80,13 +79,9 @@ public class LastQueryExecutor {
 
     for (int i = 0; i < selectedSeries.size(); i++) {
       TimeValuePair lastTimeValuePair = null;
-      try {
-        lastTimeValuePair = calculateLastPairForOneSeries(
-                new PartialPath(selectedSeries.get(i).getFullPath()), dataTypes.get(i), context,
-                lastQueryPlan.getAllMeasurementsInDevice(selectedSeries.get(i).getDevice()));
-      } catch (IllegalPathException e) {
-        throw new QueryProcessException(e.getMessage());
-      }
+      lastTimeValuePair = calculateLastPairForOneSeries(
+              selectedSeries.get(i), dataTypes.get(i), context,
+              lastQueryPlan.getAllMeasurementsInDevice(selectedSeries.get(i).getDevice()));
       if (lastTimeValuePair.getValue() != null) {
         RowRecord resultRecord = new RowRecord(lastTimeValuePair.getTimestamp());
         Field pathField = new Field(TSDataType.TEXT);