akashrn5 commented on a change in pull request #3608:
[CARBONDATA-3680][alpha-feature]Support Secondary Index feature on carbon table.
URL: https://github.com/apache/carbondata/pull/3608#discussion_r378309510
##########
File path:
core/src/main/java/org/apache/carbondata/core/datamap/dev/expr/DataMapExprWrapper.java
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@@ -32,14 +32,14 @@
* It is the wrapper around datamap and related filter expression. By using it
user can apply
* datamaps in expression style.
*/
-public interface DataMapExprWrapper extends Serializable {
+public abstract class DataMapExprWrapper implements Serializable {
Review comment:
since some users are still using older java version,i think we can keep
until we completely move out.
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