[iotdb] branch master updated: [IOTDB-3320] Don't return data which are not satisfied with time filter in last query (#6068)

[jackietien]

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jackietien pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/iotdb.git


The following commit(s) were added to refs/heads/master by this push:
     new e1dfec58e3 [IOTDB-3320] Don't return data which are not satisfied with 
time filter in last query (#6068)
e1dfec58e3 is described below

commit e1dfec58e36a3f81cb06dbdf09e8cba1ef9b633c
Author: Jackie Tien <jackietie...@gmail.com>
AuthorDate: Mon May 30 16:29:24 2022 +0800

    [IOTDB-3320] Don't return data which are not satisfied with time filter in 
last query (#6068)
---
 .../db/mpp/execution/operator/process/UpdateLastCacheOperator.java   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git 
a/server/src/main/java/org/apache/iotdb/db/mpp/execution/operator/process/UpdateLastCacheOperator.java
 
b/server/src/main/java/org/apache/iotdb/db/mpp/execution/operator/process/UpdateLastCacheOperator.java
index 4ce473e62b..f2ec8c0cc8 100644
--- 
a/server/src/main/java/org/apache/iotdb/db/mpp/execution/operator/process/UpdateLastCacheOperator.java
+++ 
b/server/src/main/java/org/apache/iotdb/db/mpp/execution/operator/process/UpdateLastCacheOperator.java
@@ -96,6 +96,11 @@ public class UpdateLastCacheOperator implements 
ProcessOperator {
 
     checkArgument(res.getPositionCount() == 1, "last query result should only 
have one record");
 
+    // last value is null
+    if (res.getColumn(0).isNull(0)) {
+      return LAST_QUERY_EMPTY_TSBLOCK;
+    }
+
     long lastTime = res.getColumn(0).getLong(0);
     TsPrimitiveType lastValue = res.getColumn(1).getTsPrimitiveType(0);