amrishlal commented on a change in pull request #8029:
URL: https://github.com/apache/pinot/pull/8029#discussion_r821031097



##########
File path: 
pinot-common/src/main/java/org/apache/pinot/sql/parsers/CalciteSqlParser.java
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@@ -369,6 +369,9 @@ private static PinotQuery 
compileCalciteSqlToPinotQuery(String sql) {
       DataSource dataSource = new DataSource();
       dataSource.setTableName(fromNode.toString());
       pinotQuery.setDataSource(dataSource);
+      if (fromNode instanceof SqlSelect || fromNode instanceof SqlOrderBy) {

Review comment:
       My understanding is that by the time reducer code is called, you have 
flattened all the subqueries into a single query? In that case you would need 
to appropriately set a table name for reducer (or make other appropriate 
changes so that the query is semantically correct).




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