Package com.twilio.kudu.sql

Class CalciteKuduPredicate

java.lang.Object

com.twilio.kudu.sql.CalciteKuduPredicate

Direct Known Subclasses:

ComparisonPredicate, InListPredicate, NullPredicate

public abstract class CalciteKuduPredicate
extends Object

A simple "case" class / POJO to help with code generation in KuduToEnumerableConverter. Simplifies the Expression generation so it is more readable

Constructor Summary

Constructors

Constructor	Description
CalciteKuduPredicate()

Method Summary

Modifier and Type	Method	Description
abstract String	explainPredicate(org.apache.kudu.ColumnSchema columnSchema)	Constructs a string used when generating the explain plan
abstract int	getColumnIdx()	returns the column index for this predicate
boolean	inListOptimizationAllowed(int columnIdx)	Returns true or false if this can be considered for in list optimization.
protected org.apache.kudu.client.KuduPredicate.ComparisonOp	invertComparisonOp(org.apache.kudu.client.KuduPredicate.ComparisonOp currentOp)
org.apache.kudu.client.KuduPredicate	toPredicate(CalciteKuduTable calciteKuduTable)	Transforms this POJO into a proper KuduPredicate
abstract org.apache.kudu.client.KuduPredicate	toPredicate(org.apache.kudu.ColumnSchema columnSchema, boolean invertValue)	Transforms this POJO into a proper KuduPredicate

Methods inherited from class java.lang.Object

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

Constructor Detail

CalciteKuduPredicate

public CalciteKuduPredicate()

Method Detail

toPredicate

public abstract org.apache.kudu.client.KuduPredicate toPredicate(org.apache.kudu.ColumnSchema columnSchema,
                                                                 boolean invertValue)

Transforms this POJO into a proper KuduPredicate

Parameters:

columnSchema - column schema to use for the predicate

invertValue - true if the column is stored in descending order

Returns:

KuduPredicate that represents this POJO

getColumnIdx

public abstract int getColumnIdx()

returns the column index for this predicate

Returns:

integer of the column in Kudu

explainPredicate

public abstract String explainPredicate(org.apache.kudu.ColumnSchema columnSchema)

Constructs a string used when generating the explain plan

Parameters:

columnSchema - Schema of the column from Kudu

Returns:

Formatted string from RelWriter to use

inListOptimizationAllowed

public boolean inListOptimizationAllowed(int columnIdx)

Returns true or false if this can be considered for in list optimization.

Parameters:

columnIdx - the column index in the KuduTable

Returns:

true if this column and predicate can be optimized into an InListPredicate

toPredicate

public org.apache.kudu.client.KuduPredicate toPredicate(CalciteKuduTable calciteKuduTable)

Transforms this POJO into a proper KuduPredicate

Parameters:

calciteKuduTable - table to use to generate predicate

Returns:

KuduPredicate that represents this POJO

invertComparisonOp

protected org.apache.kudu.client.KuduPredicate.ComparisonOp invertComparisonOp(org.apache.kudu.client.KuduPredicate.ComparisonOp currentOp)