amansinha100 commented on a change in pull request #1401: DRILL-6616: Batch
Processing for Lateral/Unnest
URL: https://github.com/apache/drill/pull/1401#discussion_r205918553
##########
File path:
contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcPrel.java
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@@ -130,4 +131,10 @@ public SelectionVectorMode getEncoding() {
public boolean needsFinalColumnReordering() {
return false;
}
+
+ @Override
+ public Prel addImplicitRowIDCol(List<RelNode> children) {
Review comment:
I am thinking a cleaner interface would be to have an additional method
`supportsImplicitRIDCol()` which would return FALSE by default. You could use
the Java 8 feature for default interface methods [1]. Only call
`addImplicitRowIdCol()` if adding the rowid is supported.
[1] https://dzone.com/articles/interface-default-methods-java
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