private List<String> getColumns(SourceRecord record) {
        Struct value = ((Struct) record.value()).getStruct("after");

        List<String> columnNames = new ArrayList<>();
        int i = 0;
        for (Field field : value.schema().fields()) {
            i++;
            columnNames.add(field.name());
        }
        return columnNames;

    }
Constructs the SqlManager.

@param opts   the ReplicaDB ToolOptions describing the user's requested action.
@param dsType
src/main/java/org/replicadb/manager/cdc/OracleManagerCDC.java