org.apache.drill.exec.planner.sql.handlers

Class ComplexUnnestVisitor

java.lang.Object

org.apache.calcite.rel.RelShuttleImpl

org.apache.drill.exec.planner.sql.handlers.ComplexUnnestVisitor

All Implemented Interfaces:

org.apache.calcite.rel.RelShuttle

public class ComplexUnnestVisitor
extends org.apache.calcite.rel.RelShuttleImpl

Visitor that moves non-RexFieldAccess rex node from project below Uncollect to the left side of the Correlate.

Field Summary

Fields inherited from class org.apache.calcite.rel.RelShuttleImpl

stack

Method Summary

Modifier and Type	Method and Description
static org.apache.calcite.rel.RelNode	rewriteUnnestWithComplexExprs(org.apache.calcite.rel.RelNode relNode) Rewrites rel node tree and moves non-RexFieldAccess rex node from the project below Uncollect to the left side of the Correlate.
org.apache.calcite.rel.RelNode	visit(org.apache.calcite.rel.logical.LogicalCorrelate correlate)
org.apache.calcite.rel.RelNode	visit(org.apache.calcite.rel.RelNode other)
org.apache.calcite.rel.RelNode	visit(org.apache.calcite.rel.core.Uncollect uncollect)

Methods inherited from class org.apache.calcite.rel.RelShuttleImpl

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

Method Detail

visit

public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.logical.LogicalCorrelate correlate)

Specified by:

visit in interface org.apache.calcite.rel.RelShuttle

Overrides:

visit in class org.apache.calcite.rel.RelShuttleImpl

visit

public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.RelNode other)

Specified by:

visit in interface org.apache.calcite.rel.RelShuttle

Overrides:

visit in class org.apache.calcite.rel.RelShuttleImpl

visit

public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.core.Uncollect uncollect)

rewriteUnnestWithComplexExprs

public static org.apache.calcite.rel.RelNode rewriteUnnestWithComplexExprs(org.apache.calcite.rel.RelNode relNode)

Rewrites rel node tree and moves non-RexFieldAccess rex node from the project below Uncollect to the left side of the Correlate.

Parameters:

relNode - tree to be rewritten

Returns:

rewritten rel node tree