[Bug][Sort] NPE occurs when running Oracle all database migration jobs

[e-mhui]

What happened

The following error occurs when enabling incremental snapshots during all database migration job.

Caused by: java.lang.NullPointerException
	at org.apache.inlong.sort.cdc.oracle.debezium.table.RowDataDebeziumDeserializeSchema$18.convert(RowDataDebeziumDeserializeSchema.java:723) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]
	at org.apache.inlong.sort.cdc.oracle.debezium.table.RowDataDebeziumDeserializeSchema$13.convert(RowDataDebeziumDeserializeSchema.java:506) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]
	at org.apache.inlong.sort.cdc.oracle.debezium.table.RowDataDebeziumDeserializeSchema.extractAfterRow(RowDataDebeziumDeserializeSchema.java:827) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]
	at org.apache.inlong.sort.cdc.oracle.debezium.table.RowDataDebeziumDeserializeSchema.deserialize(RowDataDebeziumDeserializeSchema.java:799) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]
	at org.apache.inlong.sort.cdc.oracle.debezium.table.RowDataDebeziumDeserializeSchema.deserialize(RowDataDebeziumDeserializeSchema.java:788) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]
	at org.apache.inlong.sort.cdc.oracle.source.reader.OracleRecordEmitter.emitElement(OracleRecordEmitter.java:96) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]
	at org.apache.inlong.sort.cdc.oracle.source.reader.OracleRecordEmitter.processElement(OracleRecordEmitter.java:87) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]
	at org.apache.inlong.sort.cdc.oracle.shaded.org.apache.inlong.sort.cdc.base.source.reader.IncrementalSourceRecordEmitter.emitRecord(IncrementalSourceRecordEmitter.java:87) ~[pool-1-thread-8-1679744496795-dev-sort-connector-oracle-cdc-1.5.0-SNAPSHOT.jar:2.3.0]

What you expected to happen

Run job normally.

How to reproduce

Run all database migration job.

Environment

No response

InLong version

master

InLong Component

InLong Sort

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct