public override string PagedQuery(IQuery query, uint numberPerPage, uint page) { query.ThrowIfNullArgument(nameof(query)); if (page == 0 || numberPerPage == 0) { GenerateExceptionHelper.ThrowMustGreaterThanZero(); } if (query.Order == null) { GenerateExceptionHelper.ThrowPagedQueryMustSpecifyOrder(); } try { IReadOnlyList <SingleEntityView> svList = _vv.VisitAlias(query.View); StringBuilder sql = new StringBuilder(); if (page == 1) { sql.Append(_tr.Select).AppendFormat(TOP_N, numberPerPage); sql.Append(_cb.BuildSelectColumns(query.View)); sql.Append(_tr.From).Append(_vv.BuildJoinClause(query.View)); if (query.Criteria != null) { sql.Append(_tr.Where); sql.Append(_cv.BuildWhereFilters(query.Criteria, svList)); } sql.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList)); return(sql.ToString()); } else { StringBuilder sub = new StringBuilder(); sub.Append(_tr.Select).AppendFormat(TOP_N, (page - 1) * numberPerPage).Append(_ov.BuildOrderSelectColumns(query.Order, svList)); sub.Append(_tr.From).Append(_vv.BuildJoinClause(query.View)); if (query.Criteria != null) { sub.Append(_tr.Where).Append(_cv.BuildWhereFilters(query.Criteria, svList)); } sub.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList)); sql.Append(_tr.Select).AppendFormat(TOP_N, numberPerPage).Append(_cb.BuildSelectColumns(query.View)); sql.Append(_tr.From).Append(_vv.BuildJoinClause(query.View)); sql.Append(_tr.Where).Append(_ov.BuildOrderSelectColumns(query.Order, svList)).Append(_tr.NotIn).Append(sub.Bracketing(StringPair.Parenthesis)); if (query.Criteria != null) { sql.Append(_tr.And).Append(_cv.BuildWhereFilters(query.Criteria, svList)); } sql.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList)); return(sql.ToString()); } } catch (Exception ex) { throw ex.CreateWrapException <SQLGenerateException>(); } }
public override string PagedQuery(IQuery query, uint numberPerPage, uint page) { query.ThrowIfNullArgument(nameof(query)); if (page == 0 || numberPerPage == 0) { GenerateExceptionHelper.ThrowMustGreaterThanZero(); } if (query.Order == null) { GenerateExceptionHelper.ThrowPagedQueryMustSpecifyOrder(); } try { string pagedQuery = "SELECT * FROM (SELECT row_.*, rownum rownum_ FROM ({0}) row_ WHERE rownum <= {1}) WHERE rownum_ > {2}"; var n1 = numberPerPage * page; var n2 = numberPerPage * (page - 1); var svList = _vv.VisitAlias(query.View); StringBuilder str = new StringBuilder(); str.Append(_tr.Select).Append(_cb.BuildSelectColumns(query.View)); str.Append(_tr.From).Append(_vv.BuildJoinClause(query.View)); if (query.Criteria != null) { str.Append(_tr.Where).Append(_cv.BuildWhereFilters(query.Criteria, svList)); } str.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList)); return(string.Format(pagedQuery, str, n1, n2)); } catch (Exception ex) { throw ex.CreateWrapException <SQLGenerateException>(); } }