Package org.apache.druid.sql.calcite.run

Class SqlEngines

java.lang.Object

org.apache.druid.sql.calcite.run.SqlEngines

public class SqlEngines
extends Object

Constructor Summary

Constructors

Constructor	Description
SqlEngines()

Method Summary

Modifier and Type	Method	Description
static DruidException	generateUnrecognizedFeatureException(String engineName, EngineFeature unrecognizedFeature)	This is a helper function that provides a developer-friendly exception when an engine cannot recognize the feature.
static void	validateNoSpecialContextKeys(Map<String,Object> queryContext, Set<String> specialContextKeys)	Validates that a provided query context does not have any of the internal, special context keys listed in the specialContextKeys collection.

Methods inherited from class java.lang.Object

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

Constructor Details

SqlEngines

public SqlEngines()

Method Details

validateNoSpecialContextKeys

public static void validateNoSpecialContextKeys(Map<String,Object> queryContext,
 Set<String> specialContextKeys)

Validates that a provided query context does not have any of the internal, special context keys listed in the specialContextKeys collection. Returns quietly if the context is OK; throws ValidationException if there is a problem. This is a helper function used by SqlEngine.validateContext(java.util.Map<java.lang.String, java.lang.Object>) implementations.

generateUnrecognizedFeatureException

public static DruidException generateUnrecognizedFeatureException(String engineName,
 EngineFeature unrecognizedFeature)

This is a helper function that provides a developer-friendly exception when an engine cannot recognize the feature.