log error:
`W20230830 11:19:47.495721 3046231 status.h:363] meet error status: [INTERNAL_ERROR]user function's name should be function_id.checksum[.file_name].file_type, now the all split parts are by delimiter(.): 7119053928154065546.20c8228267b6c9ce620fddb39467d3eb.postgresql-42.5.0.jar`
When the jdbc driver had `.` in its name we failed to split it properly
* [bugfix](memleak) UserFunctionCache may have memory leak during close
* [bugfix](memleak) UserFunctionCache may have memory leak during close
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Co-authored-by: yiguolei <yiguolei@gmail.com>
Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
This pr does three things:
1. Use Druid instead of HikariCP in JdbcClient
2. when download udf jar, add the name of the jar package after the local file name.
3. refactor some jdbcResource code
Add a new config "jdbc_drivers_dir" for both FE and BE.
User can put jdbc drivers' jar file in this dir, and only specify file name in "driver_url" properties
when creating jdbc resource.
And Doris will find jar files in this dir.
Also modify the logic so that when the jdbc resource is modified, the corresponding jdbc table
will get the latest properties.
This feature is propsoed in [DSIP-1](https://cwiki.apache.org/confluence/display/DORIS/DSIP-001%3A+Java+UDF).
This PR support fixed-length input and output Java UDF. Phase I in DIP-1 is done after this PR.
To support Java UDF effeciently, I use no data copy in JNI call and all compute operations are off-heap in Java.
To achieve that, I use a UdfExecutor instead.
For users, a UDF class must have a public evaluate method.
* Add UserFunctionCache to cache UDF's library
This patch replace LibCache with UserFunctionCache. LibCache use HDFS
URL to identify a UDF's Library, and when BE process restart all of
downloaded library should be loaded another time. We use function id
corresponding to a library, and when process restart, all downloaded
libraries can be loaded without another downloading.
* update
