org.apache.drill.exec.planner.logical

Class DrillOptiq

java.lang.Object

org.apache.drill.exec.planner.logical.DrillOptiq

public class DrillOptiq
extends Object

Utilities for Drill's planner.

Field Summary

Fields

Modifier and Type	Field and Description
static String	UNSUPPORTED_REX_NODE_ERROR

Constructor Summary

Constructors

Constructor and Description
DrillOptiq()

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	isLiteralNull(org.apache.calcite.rex.RexLiteral literal)
static LogicalExpression	toDrill(DrillParseContext context, List<org.apache.calcite.rel.RelNode> inputs, org.apache.calcite.rex.RexNode expr) Converts a tree of RexNode operators into a scalar expression in Drill syntax using multiple inputs.
static LogicalExpression	toDrill(DrillParseContext context, org.apache.calcite.rel.RelNode input, org.apache.calcite.rex.RexNode expr) Converts a tree of RexNode operators into a scalar expression in Drill syntax using one input.

Methods inherited from class java.lang.Object

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

Field Detail

UNSUPPORTED_REX_NODE_ERROR

public static final String UNSUPPORTED_REX_NODE_ERROR

See Also:

Constant Field Values

Constructor Detail

DrillOptiq

public DrillOptiq()

Method Detail

toDrill

public static LogicalExpression toDrill(DrillParseContext context,
                        org.apache.calcite.rel.RelNode input,
                        org.apache.calcite.rex.RexNode expr)

Converts a tree of RexNode operators into a scalar expression in Drill syntax using one input.

Parameters:

context - parse context which contains planner settings

input - data input

expr - expression to be converted

Returns:

converted expression

toDrill

public static LogicalExpression toDrill(DrillParseContext context,
                        List<org.apache.calcite.rel.RelNode> inputs,
                        org.apache.calcite.rex.RexNode expr)

Converts a tree of RexNode operators into a scalar expression in Drill syntax using multiple inputs.

Parameters:

context - parse context which contains planner settings

inputs - multiple data inputs

expr - expression to be converted

Returns:

converted expression

isLiteralNull

public static boolean isLiteralNull(org.apache.calcite.rex.RexLiteral literal)