public QuerySelect copy() {
QuerySelect copy = new QuerySelect(dialect);
copy.joins = this.joins.copy();
copy.select.append(this.select.toString());
copy.where.append(this.where.toString());
copy.groupBy.append(this.groupBy.toString());
copy.orderBy.append(this.orderBy.toString());
copy.having.append(this.having.toString());
copy.comment = this.comment;
copy.distinct = this.distinct;
return copy;
}
