org.apache.druid.segment.virtual

Enum ExpressionPlan.Trait

java.lang.Object

java.lang.Enum<ExpressionPlan.Trait>

org.apache.druid.segment.virtual.ExpressionPlan.Trait

All Implemented Interfaces:

Serializable, Comparable<ExpressionPlan.Trait>

Enclosing class:

ExpressionPlan

public static enum ExpressionPlan.Trait
extends Enum<ExpressionPlan.Trait>

Enum Constant Summary

Enum Constants

Enum Constant and Description
CONSTANT expression has no inputs and can be optimized into a constant selector
INCOMPLETE_INPUTS expression has inputs whose type was incomplete, such as unknown multi-valuedness, which are not explicitly used as possibly multi-valued/array inputs
NEEDS_APPLIED expression must be implicitly mapped across the multiple values per row of known multi-value inputs, the final output will be multi-valued
NON_SCALAR_INPUTS expression explicitly using multi-valued inputs as array inputs or has array inputs
NON_SCALAR_OUTPUT expression produces explict multi-valued output
SINGLE_INPUT_MAPPABLE expression has a single input, which may produce single or multi-valued output, but if so, it must be implicitly mappable (i.e.
SINGLE_INPUT_SCALAR expression has a single, single valued input, and is dictionary encoded if the value is a string, and does not produce non-scalar output
UNKNOWN_INPUTS expression has inputs whose type was unresolveable
VECTORIZABLE expression is vectorizable

Method Summary

Modifier and Type	Method and Description
static ExpressionPlan.Trait	valueOf(String name) Returns the enum constant of this type with the specified name.
static ExpressionPlan.Trait[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

CONSTANT

public static final ExpressionPlan.Trait CONSTANT

expression has no inputs and can be optimized into a constant selector

SINGLE_INPUT_SCALAR

public static final ExpressionPlan.Trait SINGLE_INPUT_SCALAR

expression has a single, single valued input, and is dictionary encoded if the value is a string, and does not produce non-scalar output

SINGLE_INPUT_MAPPABLE

public static final ExpressionPlan.Trait SINGLE_INPUT_MAPPABLE

expression has a single input, which may produce single or multi-valued output, but if so, it must be implicitly mappable (i.e. the expression is not treating its input as an array and does not produce non-scalar output)

NEEDS_APPLIED

public static final ExpressionPlan.Trait NEEDS_APPLIED

expression must be implicitly mapped across the multiple values per row of known multi-value inputs, the final output will be multi-valued

UNKNOWN_INPUTS

public static final ExpressionPlan.Trait UNKNOWN_INPUTS

expression has inputs whose type was unresolveable

INCOMPLETE_INPUTS

public static final ExpressionPlan.Trait INCOMPLETE_INPUTS

expression has inputs whose type was incomplete, such as unknown multi-valuedness, which are not explicitly used as possibly multi-valued/array inputs

NON_SCALAR_INPUTS

public static final ExpressionPlan.Trait NON_SCALAR_INPUTS

expression explicitly using multi-valued inputs as array inputs or has array inputs

NON_SCALAR_OUTPUT

public static final ExpressionPlan.Trait NON_SCALAR_OUTPUT

expression produces explict multi-valued output

VECTORIZABLE

public static final ExpressionPlan.Trait VECTORIZABLE

expression is vectorizable

Method Detail

values

public static ExpressionPlan.Trait[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ExpressionPlan.Trait c : ExpressionPlan.Trait.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ExpressionPlan.Trait valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null