oracle.spatial.hadoop.vector.hive.function

Class ST_Length

java.lang.Object

org.apache.hadoop.hive.ql.udf.generic.GenericUDF

oracle.spatial.hadoop.vector.hive.function.ST_Length

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class ST_Length
extends org.apache.hadoop.hive.ql.udf.generic.GenericUDF

Returns the length of a line or polygon geometry.

Format:
 ST_Length(geometry ST_Geometry, tolerance NUMBER) - returns the length of a line or polygon geometry
  The tolerance is optional.
  By default the tolerance is 0.05 for geodetic geometries and 0 for non geodetic.
  For projected data, the length is in the same unit as the unit of projection. For Geodetic, the length is in meters.
  Return -1 in case of error.

Example:
 select ST_Length((
  ST_Polygon('{"type": "Polygon","coordinates": [[[1, 2], [5, 2], [5, 6], [1, 6], [1, 2]]]}', 0)
 ) from hivetable LIMIT 1; -- return 16

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredJavaObject, org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject

Field Summary

Fields

Modifier and Type	Field and Description
protected GeometryParamHelper	geometryParamHelper
protected java.util.List<org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector>	inputOIList
protected int	toleranceIndex

Constructor Summary

Constructors

Constructor and Description
ST_Length()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject[] args)
java.lang.String	getDisplayString(java.lang.String[] arg0)
org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector	initialize(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] args)

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

checkArgsSize, close, configure, copyToNewInstance, flip, getFuncName, getRequiredFiles, getRequiredJars, getUdfName, initializeAndFoldConstants

Methods inherited from class java.lang.Object

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

Field Detail

geometryParamHelper

protected transient GeometryParamHelper geometryParamHelper

inputOIList

protected transient java.util.List<org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector> inputOIList

toleranceIndex

protected transient int toleranceIndex

Constructor Detail

ST_Length

public ST_Length()

Method Detail

initialize

public org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector initialize(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] args)
                                                                         throws org.apache.hadoop.hive.ql.exec.UDFArgumentException

Specified by:

initialize in class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

Throws:

org.apache.hadoop.hive.ql.exec.UDFArgumentException

evaluate

public java.lang.Object evaluate(org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject[] args)
                          throws org.apache.hadoop.hive.ql.metadata.HiveException

Specified by:

evaluate in class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

Throws:

org.apache.hadoop.hive.ql.metadata.HiveException

getDisplayString

public java.lang.String getDisplayString(java.lang.String[] arg0)

Specified by:

getDisplayString in class org.apache.hadoop.hive.ql.udf.generic.GenericUDF