Github user jackylk commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/441#discussion_r93038276
--- Diff:
hadoop/src/main/java/org/apache/carbondata/hadoop/util/CarbonInputFormatUtil.java
---
@@ -70,6 +69,18 @@ public static CarbonQueryPlan
createQueryPlan(CarbonTable carbonTable, String co
i++;
}
}
+ } else {
+ // query all columns
+ List<CarbonMeasure> tableMsrs =
carbonTable.getMeasureByTableName(factTableName);
--- End diff --
ok, I got the issue here. Can we do like as following
1. if it is come from count(*), we set the projection column to a special
string (like empty string "") in configuration, then we can process it
differently in `createQueryPlan`.
2. If user want to project all column, projection column should be set to
null or list all columns.
3. If user want to project specific columns, then set it to specific columns
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