public static TableId getTableId(SourceRecord dataRecord) {
        Struct value = (Struct) dataRecord.value();
        Struct source = value.getStruct(Envelope.FieldName.SOURCE);
        String dbName = source.getString(AbstractSourceInfo.DATABASE_NAME_KEY);
        String tableName = source.getString(AbstractSourceInfo.TABLE_NAME_KEY);
        return new TableId(dbName, null, tableName);
    }
Returns the start offset of the binlog split.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/utils/RecordUtils.java