Supports parsing SQL for a DB2 database

[comecny]

Feature Request

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Is your feature request related to a problem?

Describe the feature you would like.

Our project uses DB2, and we want to implement ShardingSphere

[linghengqian]

• There is a ready-made testcontainers-java module at https://java.testcontainers.org/modules/databases/db2/ , and it is not a big problem to include a Docker Image of DB2 and https://mvnrepository.com/artifact/com.ibm.db2/jcc/11.5.9.0 for integration testing.

• The problem is that it seems that you are the only one who knows the syntax for DB2 at the moment, are you willing to provide a PR?

[comecny]

sure , assign it to me , the issue was resolved quickly