[GitHub] [iotdb] liuminghui233 commented on a diff in pull request #7146: [IOTDB-4246]select last query without schema data only return time column

[GitBox <gi...@apache.org>]

liuminghui233 commented on code in PR #7146:
URL: https://github.com/apache/iotdb/pull/7146#discussion_r956933994


##########
server/src/main/java/org/apache/iotdb/db/mpp/plan/analyze/AnalyzeVisitor.java:
##########
@@ -177,6 +177,11 @@ public Analysis visitQuery(QueryStatement queryStatement, MPPQueryContext contex
       logger.info("{} fetch query schema...", getLogHeader());
       ISchemaTree schemaTree = schemaFetcher.fetchSchema(patternTree);
       logger.info("{} fetch schema done", getLogHeader());
+
+      if (queryStatement.isLastQuery()) {
+        analysis.setRespDatasetHeader(DatasetHeaderFactory.getLastQueryHeader());
+      }
+
       // If there is no leaf node in the schema tree, the query should be completed immediately
       if (schemaTree.isEmpty()) {

Review Comment:
   ```suggestion
         if (schemaTree.isEmpty()) {
             if (queryStatement.isLastQuery()) {
               analysis.setRespDatasetHeader(DatasetHeaderFactory.getLastQueryHeader());
             }
   ```



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