org.apache.drill.exec.store.base.filter

Class ExprNode.ColRelOpConstNode

java.lang.Object

org.apache.drill.exec.store.base.filter.ExprNode

org.apache.drill.exec.store.base.filter.ExprNode.RelOpNode

org.apache.drill.exec.store.base.filter.ExprNode.ColRelOpConstNode

Enclosing class:

ExprNode

public static class ExprNode.ColRelOpConstNode
extends ExprNode.RelOpNode

Semanticized form of a Calcite relational operator. Abstracts out the Drill implementation details to capture just the column name, operator and value. Supports only expressions of the form:
<column> <relop> <const>
Where the column is a simple name (not an array or map reference), the relop is one of a defined set, and the constant is one of the defined Drill types.

(The driver will convert expressions of the form:
<const> <relop> <column>
into the normalized form represented here.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.store.base.filter.ExprNode

ExprNode.AndNode, ExprNode.ColRelOpConstNode, ExprNode.ColumnTypeNode, ExprNode.ListNode, ExprNode.OrNode, ExprNode.RelOpNode

Field Summary

Fields

Modifier and Type	Field and Description
String	colName
ConstantHolder	value

Fields inherited from class org.apache.drill.exec.store.base.filter.ExprNode.RelOpNode

op

Constructor Summary

Constructors

Constructor and Description
ColRelOpConstNode(ExprNode.ColRelOpConstNode from, ConstantHolder value) Rewrite the RelOp with a normalized value.
ColRelOpConstNode(String colName, RelOp op, ConstantHolder value)

Method Summary

Modifier and Type	Method and Description
ExprNode.ColRelOpConstNode	normalize(ConstantHolder normalizedValue) Rewrite a relop using the given normalized value.
ExprNode.ColRelOpConstNode	rewrite(String newName, ConstantHolder newValue)
String	toString()

Methods inherited from class org.apache.drill.exec.store.base.filter.ExprNode.RelOpNode

selectivity

Methods inherited from class org.apache.drill.exec.store.base.filter.ExprNode

rexNode, tag

Methods inherited from class java.lang.Object

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

Field Detail

colName

public final String colName

value

public final ConstantHolder value

Constructor Detail

ColRelOpConstNode

public ColRelOpConstNode(String colName,
                         RelOp op,
                         ConstantHolder value)

ColRelOpConstNode

public ColRelOpConstNode(ExprNode.ColRelOpConstNode from,
                         ConstantHolder value)

Rewrite the RelOp with a normalized value.

Parameters:

from - the original RelOp

value - the new value with a different type and matching value

Method Detail

normalize

public ExprNode.ColRelOpConstNode normalize(ConstantHolder normalizedValue)

Rewrite a relop using the given normalized value.

Parameters:

normalizedValue - given normalized value

Returns:

a new RelOp with the normalized value. Will be the same relop if the normalized value is the same as the unnormalized value.

rewrite

public ExprNode.ColRelOpConstNode rewrite(String newName,
                                          ConstantHolder newValue)

toString

public String toString()

Overrides:

toString in class Object