Uses of Package
com.aliyun.odps.udf

Packages that use com.aliyun.odps.udf

Package	Description
com.aliyun.odps.exec
com.aliyun.odps.udf	UDF API 主要包括 UDF（User Defined Function，用户自定义函数） 和 UDTF （User Defined Table-generating Function，用户自定义生成表函数）
com.aliyun.odps.udf.impl	UDF SDK中用于内部实现的功能，这部分不属于API，接口随时可能改变，不推荐使用。

Classes in com.aliyun.odps.udf used by com.aliyun.odps.exec

Class and Description
ExecutionContext 运行时的执行上下文信息。

Classes in com.aliyun.odps.udf used by com.aliyun.odps.udf

Class and Description
BaseStorageHandler This is the interface on top of which both Hive-compatible and ODPS storage handlers are built Internal usage *ONLY* within ODPS framework.
ContextFunction 拥有 ExecutionContext的一类自定义函数。
DataAttributes Provides interfaces to access different attributes of the underlying data, including the attributes provided by the user, as well as different (system) properties that govern the underlying data, such as the record columns, resources used, etc.
DataCollector
ExecutionContext 运行时的执行上下文信息。
Extractor Base extractor class, user-defined extractors shall extend from this class
InputFormat TODO: see if we can remove this
OdpsType 映射到ODPS数据类型，包括 STRING：字符串 BIGINT：长整数型 DOUBLE：双精度符点数类型 BOOLEAN：双精度符点数类型 IGNORE：忽略类型映射 不推荐直接使用。
Outputer Base outputer class, custom outputer shall extend from this class
OutputFormat TODO: see if we can remove this OutputFormat describes the output-specification
RecordReader RecordReader converts the byte-oriented view of the input, provided by the InputSplit, and presents a record-oriented Writable (which will usually de-serialized into Record by an implementation of RecordSerDe ).
RecordSerDe SerDe interface for ODPS record to and from Writable
RecordWriter RecordWriter writes the output Writable record (usually serialized by an implementation of RecordSerDe)to output.
TableRecordReader
UDFException 通用的UDF异常类，用于封装UDF运行期间的各种异常。
UDTF UDTF 是 User Defined Table-generating Function 缩写，用来解决一次函数调用输出多行数据的场景，也是唯一能返回多个字段的自定义函数。
UDTFCollector 从UDTF数据源收集数据 通常 UDTF.forward(Object...)会把每一行数据传入UDTFCollector
UDTFPuller

Classes in com.aliyun.odps.udf used by com.aliyun.odps.udf.impl

Class and Description
OdpsType 映射到ODPS数据类型，包括 STRING：字符串 BIGINT：长整数型 DOUBLE：双精度符点数类型 BOOLEAN：双精度符点数类型 IGNORE：忽略类型映射 不推荐直接使用。
UDFException 通用的UDF异常类，用于封装UDF运行期间的各种异常。