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Bug report

When Oracle connector obtains new lob data, it does not make any changes to commit_scn

What Debezium connector do you use and what version?

oracle-connector

What is the captured database version and mode of depoyment?

oracle_19c

What behaviour do you expect?

when  insert some new lob-type data, i can see the new commit_scn in kafka topic

What behaviour do you see?

CreateTime:1655441784664        ["source-CJ_0101",{"server":"cj_server0101"}]     {"commit_scn":"2054923468","transaction_id":null,"snapshot_scn":"2054803212","scn":"2054923467"}
CreateTime:1655451084712        ["source-CJ_0101",{"server":"cj_server0101"}]     {"commit_scn":"2054923468","transaction_id":null,"snapshot_scn":"2054803212","scn":"2054983937"}
CreateTime:1655451144714        ["source-CJ_0101",{"server":"cj_server0101"}]     {"commit_scn":"2054923468","transaction_id":null,"snapshot_scn":"2054803212","scn":"2054986353"}
CreateTime:1655451204715        ["source-CJ_0101",{"server":"cj_server0101"}]     {"commit_scn":"2054923468","transaction_id":null,"snapshot_scn":"2054803212","scn":"2054986525"}
CreateTime:1655451264717        ["source-CJ_0101",{"server":"cj_server0101"}]     {"commit_scn":"2054923468","transaction_id":null,"snapshot_scn":"2054803212","scn":"2054987145"} 

Do you see the same behaviour using the latest relesead Debezium version?

(Ideally, also verify with latest Alpha/Beta/CR version)

also in V2.0 

How to reproduce the issue using our tutorial deployment?

just insert lob-type data

Implementation ideas (optional)

You can see a function named "handlecommit (oraclepartition partition, logminereventrow)" in AbstractLogMinerEventProcessor.java

if (--numEvents == 0) {
    // reached the last event update the commit scn in the offsets
    offsetContext.setCommitScn(commitScn);
}  

if you have events type is "EventType.LOB_WRITE", you will merge those events to the previous dml-event, so "--numEvents == 0" always is false ，you can't push any  commit_scn to kafka !!