[GitHub] [incubator-doris] morningman commented on a change in pull request #3056: implement except node

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

morningman commented on a change in pull request #3056: implement except node
URL: https://github.com/apache/incubator-doris/pull/3056#discussion_r390335009
 
 

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 File path: fe/src/main/java/org/apache/doris/analysis/SetOperationStmt.java
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 @@ -649,6 +648,13 @@ public void analyze(Analyzer parent) throws AnalysisException, UserException {
             if (isAnalyzed()) {
                 return;
             }
+            if (queryStmt instanceof SelectStmt && ((SelectStmt) queryStmt).fromClause_.isEmpty()) {
 
 Review comment:
   What this for? Could you add comment to explain this rewrite?

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