org.apache.flink.table.functions.hive

类 HiveGenericUDTF

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>

org.apache.flink.table.functions.hive.HiveGenericUDTF

所有已实现的接口:

Serializable, org.apache.flink.table.functions.FunctionDefinition, HiveFunction

@Internal
public class HiveGenericUDTF
extends org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>
implements HiveFunction

A TableFunction implementation that calls Hive's GenericUDTF.

另请参阅:

序列化表格

字段概要

从类继承的字段 org.apache.flink.table.functions.TableFunction

collector

构造器概要

构造器

构造器和说明
HiveGenericUDTF(HiveFunctionWrapper<org.apache.hadoop.hive.ql.udf.generic.GenericUDTF> hiveFunctionWrapper, HiveShim hiveShim)

方法概要

限定符和类型	方法和说明
void	close()
void	eval(Object... args)
org.apache.flink.table.types.DataType	getHiveResultType(Object[] constantArguments, org.apache.flink.table.types.DataType[] argTypes) Get result type by arguments and argTypes.
org.apache.flink.api.common.typeinfo.TypeInformation	getResultType()
void	open(org.apache.flink.table.functions.FunctionContext context)
void	setArgumentTypesAndConstants(Object[] constantArguments, org.apache.flink.table.types.DataType[] argTypes) Set arguments and argTypes for Function instance.
protected void	setCollector(org.apache.hadoop.hive.ql.udf.generic.Collector collector)

从类继承的方法 org.apache.flink.table.functions.TableFunction

collect, getKind, getParameterTypes, setCollector

从类继承的方法 org.apache.flink.table.functions.UserDefinedFunction

functionIdentifier, toString

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic

构造器详细资料

HiveGenericUDTF

public HiveGenericUDTF(HiveFunctionWrapper<org.apache.hadoop.hive.ql.udf.generic.GenericUDTF> hiveFunctionWrapper,
                       HiveShim hiveShim)

方法详细资料

open

public void open(org.apache.flink.table.functions.FunctionContext context)
          throws Exception

覆盖:

open 在类中 org.apache.flink.table.functions.UserDefinedFunction

抛出:

Exception

setCollector

@VisibleForTesting
protected final void setCollector(org.apache.hadoop.hive.ql.udf.generic.Collector collector)

eval

public void eval(Object... args)
          throws org.apache.hadoop.hive.ql.metadata.HiveException

抛出:

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

setArgumentTypesAndConstants

public void setArgumentTypesAndConstants(Object[] constantArguments,
                                         org.apache.flink.table.types.DataType[] argTypes)

从接口复制的说明: HiveFunction

Set arguments and argTypes for Function instance. In this way, the correct method can be really deduced by the function instance.

指定者:

setArgumentTypesAndConstants 在接口中 HiveFunction

参数:

constantArguments - arguments of a function call (only literal arguments are passed, nulls for non-literal ones)

argTypes - types of arguments

getHiveResultType

public org.apache.flink.table.types.DataType getHiveResultType(Object[] constantArguments,
                                                               org.apache.flink.table.types.DataType[] argTypes)

从接口复制的说明: HiveFunction

Get result type by arguments and argTypes.

We can't use getResultType(Object[], Class[]). The Class[] is the classes of what is defined in eval(), for example, if eval() is "public Integer eval(Double)", the argTypes would be Class[Double]. However, in our wrapper, the signature of eval() is "public Object eval(Object... args)", which means we cannot get any info from the interface.

指定者:

getHiveResultType 在接口中 HiveFunction

参数:

constantArguments - arguments of a function call (only literal arguments are passed, nulls for non-literal ones)

argTypes - types of arguments

返回:

result type.

getResultType

public org.apache.flink.api.common.typeinfo.TypeInformation getResultType()

覆盖:

getResultType 在类中 org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>

close

public void close()
           throws Exception

覆盖:

close 在类中 org.apache.flink.table.functions.UserDefinedFunction

抛出:

Exception