amansinha100 commented on a change in pull request #729: Drill 1328: Support
table statistics for Parquet
URL: https://github.com/apache/drill/pull/729#discussion_r250441772
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File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/common/DrillScanRelBase.java
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@@ -26,23 +26,28 @@
import org.apache.drill.common.exceptions.DrillRuntimeException;
import org.apache.calcite.rel.core.TableScan;
import org.apache.calcite.plan.RelOptCluster;
+import org.apache.calcite.plan.RelOptCost;
+import org.apache.calcite.plan.RelOptPlanner;
import org.apache.calcite.plan.RelOptTable;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.drill.exec.util.Utilities;
+import org.apache.calcite.rel.metadata.RelMetadataQuery;
/**
* Base class for logical/physical scan rel implemented in Drill.
*/
public abstract class DrillScanRelBase extends TableScan implements
DrillRelNode {
protected GroupScan groupScan;
protected final DrillTable drillTable;
+ protected List<SchemaPath> columns;
Review comment:
Not sure why we need to add columns field here since it is redundant...the
GroupScan (associated with this DrillScanRel) already keeps track of the
columns.
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