@Override
    public void clear() {
        batches.clear();
        columns.clear();
        values.clear();
        subQuery = null;
    }
Set whether batches should be optimized into a single bulk operation.
Will revert to batches, if bulk is not supported
querydsl-sql/src/main/java/com/querydsl/sql/dml/AbstractSQLInsertClause.java