Github user jackylk commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2779#discussion_r221420261
--- Diff:
integration/spark2/src/main/spark2.3/org/apache/spark/sql/execution/strategy/CarbonDataSourceScan.scala
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@@ -0,0 +1,55 @@
+/*
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I think it is not possible to add lazy variable without breaking spark 2.2
integration. Since this class is small, I think it is ok to have a separate one
for spark 2.3 integration.---
