org.apache.asterix.metadata.dataset.hints

Interface IHint

All Known Implementing Classes:

DatasetHints.DatasetCardinalityHint, DatasetHints.DatasetNodegroupCardinalityHint

public interface IHint

Represents a hint provided as part of an AQL statement.

Method Summary

Methods

Modifier and Type	Method and Description
String	getName() retrieve the name of the hint.
org.apache.hyracks.algebricks.common.utils.Pair<Boolean,String>	validateValue(String value) validate the value associated with the hint.

Method Detail

getName

String getName()

retrieve the name of the hint.

Returns:

validateValue

org.apache.hyracks.algebricks.common.utils.Pair<Boolean,String> validateValue(String value)

validate the value associated with the hint.

Parameters:

value - the value associated with the hint.

Returns:

a Pair with first element as a boolean that represents the validation result. second element as the error message if the validation result is false