[iotdb] 02/02: fix queryNonexistentSeries

[rong]

This is an automated email from the ASF dual-hosted git repository.

rong pushed a commit to branch iotdb-1022-v2
in repository https://gitbox.apache.org/repos/asf/iotdb.git

commit 0ba9a37214f818c8cb3710700b265bb10f819186
Author: SteveYurongSu <steveyuron...@outlook.com>
AuthorDate: Tue May 18 17:16:30 2021 +0800

    fix queryNonexistentSeries
---
 .../src/main/java/org/apache/iotdb/db/qp/utils/WildcardsRemover.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git 
a/server/src/main/java/org/apache/iotdb/db/qp/utils/WildcardsRemover.java 
b/server/src/main/java/org/apache/iotdb/db/qp/utils/WildcardsRemover.java
index 580b3e4..d2e6054 100644
--- a/server/src/main/java/org/apache/iotdb/db/qp/utils/WildcardsRemover.java
+++ b/server/src/main/java/org/apache/iotdb/db/qp/utils/WildcardsRemover.java
@@ -31,6 +31,7 @@ import org.apache.iotdb.db.query.expression.ResultColumn;
 import org.apache.iotdb.tsfile.utils.Pair;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 public class WildcardsRemover {
@@ -126,7 +127,7 @@ public class WildcardsRemover {
       extendedExpressions.add(actualExpressions);
     }
     if (atLeastOneSeriesNotExisted) {
-      return extendedExpressions;
+      return Collections.emptyList();
     }
 
     List<List<Expression>> actualExpressions = new ArrayList<>();