UDF development examples
Use these examples to implement common user-defined function (UDF) scenarios in MaxCompute, including Hive compatibility, complex type handling, string manipulation, and resource referencing.
Java UDFs
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Write a Hive UDF in Java — Write a Java UDF in MaxCompute that is compatible with the Hive UDF interface.
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Use complex data types in Java UDFs — Work with ARRAY, MAP, and STRUCT types as UDF input or output parameters.
String operations
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Replace strings by using regular expressions — Apply pattern-based string substitution in a UDF using regular expressions.
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Obtain the values of strings that have no delimiters — Extract substrings from undelimited input strings.
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Obtain the values of strings that have delimiters — Parse and extract values from delimiter-separated strings.
Resource references
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Reference a file resource — Read an external file inside a UDF by referencing it as a file resource.
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Reference a table resource — Access MaxCompute table data inside a UDF by referencing it as a table resource.
Python UDFs
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Reference third-party packages in Python UDFs — Import and use external Python packages in a UDF.