public String getInsertWorkflowDefStatement() {
        return QueryBuilder.insertInto(keyspace, TABLE_WORKFLOW_DEFS)
                .value(WORKFLOW_DEF_NAME_KEY, bindMarker())
                .value(WORKFLOW_VERSION_KEY, bindMarker())
                .value(WORKFLOW_DEFINITION_KEY, bindMarker())
                .ifNotExists()
                .getQueryString();
    }
@return cql query statement to insert a new workflow definition into the
    "workflow_definitions" table
cassandra-persistence/src/main/java/com/netflix/conductor/cassandra/util/Statements.java