siddharthteotia commented on code in PR #8689:
URL: https://github.com/apache/pinot/pull/8689#discussion_r871773575
##########
pinot-query-planner/src/main/java/org/apache/pinot/query/planner/stage/JoinNode.java:
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@@ -20,25 +20,27 @@
import java.util.List;
import org.apache.calcite.rel.core.JoinRelType;
-import org.apache.calcite.rel.type.RelDataType;
import org.apache.pinot.query.planner.partitioning.FieldSelectionKeySelector;
import org.apache.pinot.query.planner.partitioning.KeySelector;
import org.apache.pinot.query.planner.serde.ProtoProperties;
+import org.apache.pinot.spi.data.FieldSpec;
public class JoinNode extends AbstractStageNode {
@ProtoProperties
private JoinRelType _joinRelType;
@ProtoProperties
private List<JoinClause> _criteria;
+ @ProtoProperties
+ private FieldSpec.DataType _rowType;
public JoinNode(int stageId) {
super(stageId);
}
- public JoinNode(int stageId, RelDataType rowType, JoinRelType joinRelType,
List<JoinClause> criteria) {
+ public JoinNode(int stageId, FieldSpec.DataType rowType, JoinRelType
joinRelType, List<JoinClause> criteria) {
Review Comment:
IIUC, `RelDataType` can be used to represent a field's type in Calcite and
also the `rowType` since it encapsulates the field info of all fields ? So,
replacing it here with Pinot FieldSpec.DataType for `Join` seems intuitive
since the two join key columns will be of the same type.
However, the same change further down in `TableScanNode` does not seem
intuitive because `TableScanNode` technically needs a `rowType` as it may not
necessarily work at the single column level ?
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