code: function _havingRaw(sql, bindings) {
      var raw = sql instanceof Raw ? sql : this.client.raw(sql, bindings);
      this._statements.push({
        grouping: 'having',
        type: 'havingRaw',
        value: raw,
        bool: this._bool()
      });
      return this;
    }
docs: Adds a raw `having` clause to the query.