If your data stored in Tablestore is uniquely structured and requires customized processing, such as parsing a specific JSON string, you can use User Defined Function (UDF) to define development logic.
Procedure
Install MaxCompute-Java/MaxCompute-Studio in IntelliJ IDEA. For more information, see Install MaxCompute Studio.
After the plug-in is installed, you can start development.
The following figure shows the definition of a simple UDF that connects two strings. MaxCompute supports more complex UDFs, such as user-defined window execution logic. For more information, see Develop a UDF.
Package resources and upload the JAR package to MaxCompute. For more information, see Package a Java program, upload the package, and create a MaxCompute UDF.
Run bin/odpscmd.bat.
// Select a row of data and pass in name/name to the UDF. A connection of the two strings is returned. select cloud_metric_extract_md5(name, name) as udf_test from test_table limit 1;The following result is returned:
