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How to use:

1. mvn clean install -U
2. mvn package
3. java --add-opens=java.base/java.nio=org.apache.arrow.memory.core,ALL-UNNAMED -cp java-0.1.jar doris.arrowflight.demo.Main "sql" "fe_ip" "fe_arrow_flight_port" "fe_query_port"

What can this demo do:

This is a java demo for doris arrow flight sql, you can use this to test various connection
methods for  sending queries to the doris arrow flight server, help you understand how to use arrow flight sql
and test performance. You should install maven prior to run this demo.

Performance test

Section 6.2 of https://github.com/apache/doris/issues/25514 is the performance test
results of the doris arrow flight sql using java.