oracle.spatial.hadoop.vector.hive.function

Class ST_AsWKT

java.lang.Object

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

oracle.spatial.hadoop.vector.hive.function.ST_AsWKT

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

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

Returns the well-known text (WKT) representation of the geometry.

Format:
 ST_AsWKT(geometry ST_Geometry) - return the Well-Known Text (WKT) representation of geometry

Example:
 select ST_AsWKT(
  ST_Point('{ "type": "Point", "coordinates": [0, 5]}', 8307)
 ) from hivetable LIMIT 1;

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 oracle.spatial.util.WKT	wkt

Constructor Summary

Constructors

Constructor and Description
ST_AsWKT()

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

wkt

protected transient oracle.spatial.util.WKT wkt

Constructor Detail

ST_AsWKT

public ST_AsWKT()

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