public C addBatch() {
        batches.add(new SQLUpdateBatch(metadata, updates));
        updates = new LinkedHashMap<>();
        metadata = new DefaultQueryMetadata();
        metadata.addJoin(JoinType.DEFAULT, entity);
        return (C) this;
    }
Add the current state of bindings as a batch item

@return the current object
querydsl-sql/src/main/java/com/querydsl/sql/dml/AbstractSQLUpdateClause.java