Question

包括花费很长的执行时间，我试图将其分成多个块，但仍然需要花费大量记录。

      var logbookEntriesFromDbQuery = ctx.LogbookEntries
            .AsNoTracking()
            .Include(le => le.PatientDetail)
            .Include(le => le.AlternateSupervisor)
            .Include(le => le.Hospital)
            .Include(le => le.Logbook.LogbookType.Specialty)
            .Include(le => le.Logbook.LogbookType.Fields)
            .Include(le => le.LogbookEntryProcedures.Select(lep => lep.Procedure.ProcedureLogbookTypes.Select(plt => plt.Categories)))
            .Include(le => le.LogbookEntryProcedures.Select(lep =>
                lep.LogbookEntryProcedureFields.Select(lepf => lepf.ProcedureField).Select(pf => pf.ProcedureProcedureFields)))
            .Include(le => le.LogbookEntryProcedures.Select(lep =>
                lep.LogbookEntryProcedureFields.Select(lepf => lepf.ProcedureField)
                    .Select(pf => pf.ProcedureLogbookTypeProcedureFields)))
            .Include(le => le.LogbookEntryDiagnoses.Select(led => led.Diagnosis.DiagnosisLogbookTypes))
            .Include(le => le.LogbookEntryDiagnoses.Select(led =>
                led.LogbookEntryDiagnosisProcedureFields.Select(ledpf => ledpf.ProcedureField)
                    .Select(pf => pf.DiagnosisProcedureFields)))
            .Include(le => le.LogbookEntryDiagnoses.Select(led =>
                led.LogbookEntryDiagnosisProcedureFields.Select(ledpf => ledpf.ProcedureField)
                    .Select(pf => pf.DiagnosisLogbookTypeProcedureFields)))
            .Include(le => le.LogbookEntryProcedures.Select(lep => lep.LogbookEntryProcedureComplications))
            .Include(le => le.LogbookEntryStatus)
            .Include(le => le.LogbookEntryComments)
            .Where(le => le.LogbookId == logbookId)
            .Where(le => le.LogbookEntryDate > thirtyDaysAgo);

Answer 1

这是因为具有多个Includes会在查询中生成多个JOINS，而联接通常是一个非常耗时的过程。如果您确实需要加载所有信息（例如在表中显示），一个不错的选择是在数据库中创建一个View，如果您不需要一次显示所有信息，则可以取出仅在需要使用时分别包含并获取每个字段，希望这对您有帮助

Answer 2

我在下面尝试过，但仍然花费了太长时间。

        var logbookEntriesFromDb = await ctx.LogbookEntries
            .Include(le => le.PatientDetail)
            .Include(le => le.AlternateSupervisor)
            .Where(le => le.LogbookId == logbookId)
            .Where(le => le.LogbookEntryDate > thirtyDaysAgo)
            .ToListAsync();

        logbookEntriesFromDb = await ctx.LogbookEntries
         .Include(le => le.Hospital)
         .Include(le => le.Logbook.LogbookType.Specialty)
         .Where(le => le.LogbookId == logbookId)
         .Where(le => le.LogbookEntryDate > thirtyDaysAgo)
         .ToListAsync();

        logbookEntriesFromDb = await ctx.LogbookEntries
         .Include(le => le.Logbook.LogbookType.Fields)
         .Include(le => le.LogbookEntryProcedures.Select(lep => lep.Procedure.ProcedureLogbookTypes.Select(plt => plt.Categories)))
         .Where(le => le.LogbookId == logbookId)
         .Where(le => le.LogbookEntryDate > thirtyDaysAgo)
         .ToListAsync();

        logbookEntriesFromDb = await ctx.LogbookEntries
         .Include(le => le.LogbookEntryProcedures.Select(lep =>
             lep.LogbookEntryProcedureFields.Select(lepf => lepf.ProcedureField).Select(pf => pf.ProcedureProcedureFields)))
         .Include(le => le.LogbookEntryProcedures.Select(lep =>
             lep.LogbookEntryProcedureFields.Select(lepf => lepf.ProcedureField)
                 .Select(pf => pf.ProcedureLogbookTypeProcedureFields)))
         .Where(le => le.LogbookId == logbookId)
         .Where(le => le.LogbookEntryDate > thirtyDaysAgo)
         .ToListAsync();

        logbookEntriesFromDb = await ctx.LogbookEntries
          .Include(le => le.LogbookEntryDiagnoses.Select(led => led.Diagnosis.DiagnosisLogbookTypes))
          .Include(le => le.LogbookEntryDiagnoses.Select(led =>
              led.LogbookEntryDiagnosisProcedureFields.Select(ledpf => ledpf.ProcedureField)
                  .Select(pf => pf.DiagnosisProcedureFields)))
          .Where(le => le.LogbookId == logbookId)
          .Where(le => le.LogbookEntryDate > thirtyDaysAgo)
          .ToListAsync();

        logbookEntriesFromDb = await ctx.LogbookEntries
          .Include(le => le.LogbookEntryDiagnoses.Select(led =>
              led.LogbookEntryDiagnosisProcedureFields.Select(ledpf => ledpf.ProcedureField)
                  .Select(pf => pf.DiagnosisLogbookTypeProcedureFields)))
          .Include(le => le.LogbookEntryProcedures.Select(lep => 
        lep.LogbookEntryProcedureComplications))
          .Where(le => le.LogbookId == logbookId)
          .Where(le => le.LogbookEntryDate > thirtyDaysAgo)
          .ToListAsync();

        logbookEntriesFromDb = await ctx.LogbookEntries
            .Include(le => le.LogbookEntryStatus)
            .Include(le => le.LogbookEntryComments)
            .Where(le => le.LogbookId == logbookId)
            .Where(le => le.LogbookEntryDate > thirtyDaysAgo)
            .ToListAsync();

包括花费很长时间执行

2 个答案: