org.apache.nifi.processors.hive

Class SelectHiveQL

java.lang.Object

org.apache.nifi.components.AbstractConfigurableComponent

org.apache.nifi.processor.AbstractSessionFactoryProcessor

org.apache.nifi.processor.AbstractProcessor

org.apache.nifi.processors.hive.AbstractHiveQLProcessor

org.apache.nifi.processors.hive.SelectHiveQL

All Implemented Interfaces:

ConfigurableComponent, Processor

@EventDriven
 @InputRequirement(value=INPUT_ALLOWED)
 @Tags(value={"hive","sql","select","jdbc","query","database"})
 @CapabilityDescription(value="Execute provided HiveQL SELECT query against a Hive database connection. Query result will be converted to Avro or CSV format. Streaming is used so arbitrarily large result sets are supported. This processor can be scheduled to run on a timer, or cron expression, using the standard scheduling methods, or it can be triggered by an incoming FlowFile. If it is triggered by an incoming FlowFile, then attributes of that FlowFile will be available when evaluating the select query. FlowFile attribute \'selecthiveql.row.count\' indicates how many rows were selected.")
 @WritesAttribute(attribute="mime.type",description="Sets the MIME type for the outgoing flowfile to application/avro-binary for Avro or text/csv for CSV.") @WritesAttribute(attribute="filename",description="Adds .avro or .csv to the filename attribute depending on which output format is selected.") @WritesAttribute(attribute="selecthiveql.row.count",description="Indicates how many rows were selected/returned by the query.")
public class SelectHiveQL
extends AbstractHiveQLProcessor

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	AVRO
static String	AVRO_MIME_TYPE
protected static String	CSV
static String	CSV_MIME_TYPE
static PropertyDescriptor	HIVEQL_OUTPUT_FORMAT
static PropertyDescriptor	HIVEQL_SELECT_QUERY
private static List<PropertyDescriptor>	propertyDescriptors
static Relationship	REL_FAILURE
static Relationship	REL_SUCCESS
private static Set<Relationship>	relationships
static String	RESULT_ROW_COUNT

Fields inherited from class org.apache.nifi.processors.hive.AbstractHiveQLProcessor

HIVE_DBCP_SERVICE

Constructor Summary

Constructors

Constructor and Description
SelectHiveQL()

Method Summary

Modifier and Type	Method and Description
Set<Relationship>	getRelationships()
protected List<PropertyDescriptor>	getSupportedPropertyDescriptors()
void	onTrigger(ProcessContext context, ProcessSession session)

Methods inherited from class org.apache.nifi.processor.AbstractProcessor

onTrigger

Methods inherited from class org.apache.nifi.processor.AbstractSessionFactoryProcessor

getControllerServiceLookup, getIdentifier, getLogger, getNodeTypeProvider, init, initialize, isConfigurationRestored, isScheduled, toString, updateConfiguredRestoredTrue, updateScheduledFalse, updateScheduledTrue

Methods inherited from class org.apache.nifi.components.AbstractConfigurableComponent

customValidate, equals, getPropertyDescriptor, getPropertyDescriptors, getSupportedDynamicPropertyDescriptor, hashCode, onPropertyModified, validate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.nifi.components.ConfigurableComponent

getPropertyDescriptor, getPropertyDescriptors, onPropertyModified, validate

Field Detail

RESULT_ROW_COUNT

public static final String RESULT_ROW_COUNT

See Also:

Constant Field Values

AVRO

protected static final String AVRO

See Also:

Constant Field Values

CSV

protected static final String CSV

See Also:

Constant Field Values

AVRO_MIME_TYPE

public static final String AVRO_MIME_TYPE

See Also:

Constant Field Values

CSV_MIME_TYPE

public static final String CSV_MIME_TYPE

See Also:

Constant Field Values

REL_SUCCESS

public static final Relationship REL_SUCCESS

REL_FAILURE

public static final Relationship REL_FAILURE

HIVEQL_SELECT_QUERY

public static final PropertyDescriptor HIVEQL_SELECT_QUERY

HIVEQL_OUTPUT_FORMAT

public static final PropertyDescriptor HIVEQL_OUTPUT_FORMAT

propertyDescriptors

private static final List<PropertyDescriptor> propertyDescriptors

relationships

private static final Set<Relationship> relationships

Constructor Detail

SelectHiveQL

public SelectHiveQL()

Method Detail

getSupportedPropertyDescriptors

protected List<PropertyDescriptor> getSupportedPropertyDescriptors()

Overrides:

getSupportedPropertyDescriptors in class AbstractConfigurableComponent

getRelationships

public Set<Relationship> getRelationships()

Specified by:

getRelationships in interface Processor

Overrides:

getRelationships in class AbstractSessionFactoryProcessor

onTrigger

public void onTrigger(ProcessContext context,
                      ProcessSession session)
               throws ProcessException

Specified by:

onTrigger in class AbstractProcessor

Throws:

ProcessException