Github user jackylk commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1565#discussion_r154990854
--- Diff:
core/src/main/java/org/apache/carbondata/core/metadata/schema/table/column/ColumnSchema.java
---
@@ -476,6 +492,7 @@ public void write(DataOutput out) throws IOException {
out.writeBoolean(invisible);
out.writeBoolean(isSortColumn);
out.writeUTF(null != aggFunction ? aggFunction : "");
+ out.writeUTF(null != timeSeriesFunction ? timeSeriesFunction : "");
--- End diff --
It will not be null since initialization value is ""
---
