org.apache.hadoop.hive.ql.optimizer.calcite.rules.views

Class HiveRowIsDeletedPropagator

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelShuttleImpl

org.apache.hadoop.hive.ql.optimizer.calcite.rules.views.HiveRowIsDeletedPropagator

All Implemented Interfaces:

org.apache.calcite.rel.RelShuttle, HiveRelShuttle

Direct Known Subclasses:

HiveJoinInsertDeleteIncrementalRewritingRule.FilterPropagator

public class HiveRowIsDeletedPropagator
extends HiveRelShuttleImpl

HiveRelShuttle to propagate rowIsDeleted column to all HiveRelNodes' rowType in the plan. General rule: we expect that the rowIsDeleted column is the last column in the input rowType of the current HiveRelNode.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.calcite.tools.RelBuilder	relBuilder

Fields inherited from class org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelShuttleImpl

stack

Constructor Summary

Constructors

Constructor and Description
HiveRowIsDeletedPropagator(org.apache.calcite.tools.RelBuilder relBuilder)

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.rel.RelNode	propagate(org.apache.calcite.rel.RelNode relNode)
org.apache.calcite.rel.RelNode	visit(HiveJoin join) Create new Join and a Project on top of it.
org.apache.calcite.rel.RelNode	visit(HiveProject project) Create a new Project with original projected columns plus add rowIsDeleted as last column referencing the last column of the input RelNode.
org.apache.calcite.rel.RelNode	visit(HiveTableScan scan) Create a Projection on top of TS that contains all columns from TS.

Methods inherited from class org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelShuttleImpl

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitChild, visitChildren

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

relBuilder

protected final org.apache.calcite.tools.RelBuilder relBuilder

Constructor Detail

HiveRowIsDeletedPropagator

public HiveRowIsDeletedPropagator(org.apache.calcite.tools.RelBuilder relBuilder)

Method Detail

propagate

public org.apache.calcite.rel.RelNode propagate(org.apache.calcite.rel.RelNode relNode)

visit

public org.apache.calcite.rel.RelNode visit(HiveTableScan scan)

Create a Projection on top of TS that contains all columns from TS. Let rowIsDeleted the last column in the new Project. Enable fetching Deleted rows in TS.

Specified by:

visit in interface HiveRelShuttle

Overrides:

visit in class HiveRelShuttleImpl

Parameters:

scan - - TS to transform

Returns:

- new TS and a optionally a Project on top of it.

visit

public org.apache.calcite.rel.RelNode visit(HiveProject project)

Create a new Project with original projected columns plus add rowIsDeleted as last column referencing the last column of the input RelNode.

Specified by:

visit in interface HiveRelShuttle

Overrides:

visit in class HiveRelShuttleImpl

Parameters:

project - - to transform

Returns:

new Project

visit

public org.apache.calcite.rel.RelNode visit(HiveJoin join)

Create new Join and a Project on top of it.

Specified by:

visit in interface HiveRelShuttle

Overrides:

visit in class HiveRelShuttleImpl

Parameters:

join - - HiveJoin to transform

Returns:

- new Join with a Project on top