0

这个查询非常慢。可以帮助我不知道从哪里开始。当删除 .Include("Pessoa") 时，返回非常快。

[Table("Pessoa")]
public class Pessoa
{

    public int PessoaId { get; set; }

    public string NomPessoa { get; set; }

    public string FlgTipoPessoa { get; set; }

    public DateTime DatCadastro { get; set; }

    public string ObsPessoa { get; set; }

    public virtual ICollection<Endereco> Enderecos { get; set; }

    public Pessoa()
    {
        Enderecos = new List<Endereco>();
    }

}

[Table("PessoaFisica")]
public class PessoaFisica : Pessoa
{

    public string NumCpf { get; set; }

    public string NumRg { get; set; }

    public DateTime? DatNascimento { get; set; }

    public string FlgSexo { get; set; }

}

[Table("PessoaJuridica")]
public class PessoaJuridica : Pessoa
{
    public string NumCnpj { get; set; }

    public string NumInscricaoEstadual { get; set; }

    public string NumInscricaoMunicipal { get; set; }

}

 [Table("Funcionario")]
public class Funcionario : PessoaFisica
{
    public DateTime DatAdmissao { get; set; }
    public DateTime? DatDemissao { get; set; }
    public decimal PercRoyalty { get; set; }
}

[Table("FluxoDeCaixa")]
public class FluxoDeCaixa
{
    public int FluxoDeCaixaId { get; set; }

    public int PlanoDeContasId { get; set; }
    public PlanoDeContas PlanoDeContas { get; set; }

    public string DscFluxoDeCaixa { get; set; }

    public int FuncionarioId { get; set; }
    [ForeignKey("FuncionarioId")]
    public Funcionario Funcionario { get; set; }


    public decimal ValFluxoDeCaixa { get; set; }
    public DateTime DatEmissao { get; set; }
    public DateTime DatVencimento { get; set; }
    public DateTime DatFluxo { get; set; }

    public int PessoaId { get; set; }
    [ForeignKey("PessoaId")]
    public virtual Pessoa Pessoa { get; set; }

    public string NumDocto { get; set; }
    public string NumCheque { get; set; }
    public string FlgSituacaoCheque { get; set; }
    public string ObsFluxoDeCaixa { get; set; }        
}

public override IQueryable<Entity.Modelos.FluxoDeCaixa> Filtro(System.Linq.Expressions.Expression<System.Func<Entity.Modelos.FluxoDeCaixa, bool>> expressao)
    {
        return _contexto.FluxoDeCaixa.Include("Pessoa").Where(expressao);
    }

.Filtro(f => f.DatFluxo >= dataInicial.Date && f.DatFluxo <= dataFinal.Date).ToList();

这是实体框架生成的查询，我不明白为什么要使用这么多的Left Join。我相信这就是慢慢来的原因。

{SELECT 
[Extent1].[FluxoDeCaixaId] AS [FluxoDeCaixaId], 
[Extent1].[PlanoDeContasId] AS [PlanoDeContasId], 
[Extent1].[DscFluxoDeCaixa] AS [DscFluxoDeCaixa], 
[Extent1].[FuncionarioId] AS [FuncionarioId], 
[Extent1].[ValFluxoDeCaixa] AS [ValFluxoDeCaixa], 
[Extent1].[DatEmissao] AS [DatEmissao], 
[Extent1].[DatVencimento] AS [DatVencimento], 
[Extent1].[DatFluxo] AS [DatFluxo], 
[Extent1].[PessoaId] AS [PessoaId], 
[Extent1].[NumDocto] AS [NumDocto], 
[Extent1].[NumCheque] AS [NumCheque], 
[Extent1].[FlgSituacaoCheque] AS [FlgSituacaoCheque], 
[Extent1].[ObsFluxoDeCaixa] AS [ObsFluxoDeCaixa], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN N'2X' WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN N'2X0X' WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN N'2X0X0X' ELSE N'2X1X' END AS [C1], 
[Join3].[PessoaId1] AS [PessoaId1], 
[Join3].[NomPessoa] AS [NomPessoa], 
[Join3].[FlgTipoPessoa] AS [FlgTipoPessoa], 
[Join3].[DatCadastro] AS [DatCadastro], 
[Join3].[ObsPessoa] AS [ObsPessoa], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN [Join3].[NumCpf] WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN [Join3].[NumCpf] END AS [C2], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN [Join3].[NumRg] WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN [Join3].[NumRg] END AS [C3], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS datetime) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN [Join3].[DatNascimento] WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN [Join3].[DatNascimento] END AS [C4], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN [Join3].[FlgSexo] WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN [Join3].[FlgSexo] END AS [C5], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS datetime) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN CAST(NULL AS datetime) WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN [Join3].[DatAdmissao] END AS [C6], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS datetime) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN CAST(NULL AS datetime) WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN [Join3].[DatDemissao] END AS [C7], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS decimal(18,2)) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN CAST(NULL AS decimal(18,2)) WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN [Join3].[PercRoyalty] END AS [C8], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN CAST(NULL AS nvarchar(1)) ELSE [Join3].[NumCnpj] END AS [C9], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN CAST(NULL AS nvarchar(1)) ELSE [Join3].[NumInscricaoEstadual] END AS [C10], 
CASE WHEN (( NOT (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL))) AND ( NOT (([Join3].[C12] = 1) AND ([Join3].[C12] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C11] = 1) AND ([Join3].[C11] IS NOT NULL) AND ( NOT (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)))) THEN CAST(NULL AS nvarchar(1)) WHEN (([Join3].[C2] = 1) AND ([Join3].[C2] IS NOT NULL)) THEN CAST(NULL AS nvarchar(1)) ELSE [Join3].[NumInscricaoMunicipal] END AS [C11]
FROM  [FluxoDeCaixa] AS [Extent1]
INNER JOIN  (SELECT [Extent2].[PessoaId] AS [PessoaId1], [Extent2].[NomPessoa] AS [NomPessoa], [Extent2].[FlgTipoPessoa] AS [FlgTipoPessoa], [Extent2].[DatCadastro] AS [DatCadastro], [Extent2].[ObsPessoa] AS [ObsPessoa], [Project1].[PessoaId] AS [PessoaId2], [Project1].[NumCnpj] AS [NumCnpj], [Project1].[NumInscricaoEstadual] AS [NumInscricaoEstadual], [Project1].[NumInscricaoMunicipal] AS [NumInscricaoMunicipal], [Project1].[C1] AS [C12], [Project3].[PessoaId] AS [PessoaId3], [Project3].[NumCpf] AS [NumCpf], [Project3].[NumRg] AS [NumRg], [Project3].[DatNascimento] AS [DatNascimento], [Project3].[FlgSexo] AS [FlgSexo], [Project3].[C1] AS [C11], [Project3].[DatAdmissao] AS [DatAdmissao], [Project3].[DatDemissao] AS [DatDemissao], [Project3].[PercRoyalty] AS [PercRoyalty], [Project3].[C2] AS [C2]
    FROM   [Pessoa] AS [Extent2]
    LEFT OUTER JOIN  (SELECT 
        [Extent3].[PessoaId] AS [PessoaId], 
        [Extent3].[NumCnpj] AS [NumCnpj], 
        [Extent3].[NumInscricaoEstadual] AS [NumInscricaoEstadual], 
        [Extent3].[NumInscricaoMunicipal] AS [NumInscricaoMunicipal], 
        cast(1 as bit) AS [C1]
        FROM [PessoaJuridica] AS [Extent3] ) AS [Project1] ON [Extent2].[PessoaId] = [Project1].[PessoaId]
    LEFT OUTER JOIN  (SELECT 
        [Extent4].[PessoaId] AS [PessoaId], 
        [Extent4].[NumCpf] AS [NumCpf], 
        [Extent4].[NumRg] AS [NumRg], 
        [Extent4].[DatNascimento] AS [DatNascimento], 
        [Extent4].[FlgSexo] AS [FlgSexo], 
        cast(1 as bit) AS [C1], 
        [Project2].[DatAdmissao] AS [DatAdmissao], 
        [Project2].[DatDemissao] AS [DatDemissao], 
        [Project2].[PercRoyalty] AS [PercRoyalty], 
        CASE WHEN (([Project2].[C1] = 1) AND ([Project2].[C1] IS NOT NULL)) THEN cast(1 as bit) WHEN ( NOT (([Project2].[C1] = 1) AND ([Project2].[C1] IS NOT NULL))) THEN cast(0 as bit) END AS [C2]
        FROM  [PessoaFisica] AS [Extent4]
        LEFT OUTER JOIN  (SELECT 
            [Extent5].[PessoaId] AS [PessoaId], 
            [Extent5].[DatAdmissao] AS [DatAdmissao], 
            [Extent5].[DatDemissao] AS [DatDemissao], 
            [Extent5].[PercRoyalty] AS [PercRoyalty], 
            cast(1 as bit) AS [C1]
            FROM [Funcionario] AS [Extent5] ) AS [Project2] ON [Extent4].[PessoaId] = [Project2].[PessoaId] ) AS [Project3] ON [Extent2].[PessoaId] = [Project3].[PessoaId] ) AS [Join3] ON [Extent1].[PessoaId] = [Join3].[PessoaId1]
WHERE ([Extent1].[DatFluxo] >= @p__linq__0) AND ([Extent1].[DatFluxo] <= @p__linq__1)}
4

3 回答 3

1

您的问题可能是由于在数据模型中使用 Table Per Type(TPT) 继承。我目前正在努力解决类似的问题。为了在选择基类型时实现正确的派生类型，除非您使用该OfType<>()方法，否则 Entity Framework 会将基类型表与每个可能的派生表连接起来。

context.BaseEntities.OfType<DerivedEntityX>();

我发现最好只在派生类型不多且继承深度只有一个的简单情况下使用 TPT。在您使用 TPT 的地方，请尝试仅执行简单查询。您可能会发现预生成视图可能会减少您的初始冷查询执行时间。投影到匿名类型或视图模型，您可以在其中仅选择必要的属性和/或使用该OfType<>()方法也可能有助于提高性能。当然，您也可以考虑使用 Table Per Heirarchy (TPH)，以便所有派生类型都映射到单个表。

于 2013-06-25T04:46:34.753 回答
0

首先，如果您不需要查询 Pessoa，则不要包含它。

其次，这可能是因为您的 Pessoa 实体的以下属性：

public virtual ICollection<Endereco> Enderecos { get; set; }

由于您将 Enderecos 声明为虚拟，因此每次查询 Pessoa 实体时都会延迟加载它。

请阅读此链接以获取有关加载相关属性的更多信息。

于 2013-06-25T02:38:13.720 回答
0

不确定您使用的是什么 ef 版本，但是

1）在 db 中具有适当的索引，使用生成的 sql 作为有效负载（修改为硬编码参数）： Using Database Engine Tuning Advisor

2）如果您直接使用objectcontext，那么这可能会加快速度（取决于日期范围的大小）然后像这样修改Filtro body：

var dataList= _contexto.FluxoDeCaixa.Where(expressao).ToList();

for (int x = 0; x < dataList.Count; x++)
     _contexto.LoadProperty(dataList[x], p => p.Pessoa);

return dataList;

3）理想情况下，如果您想获得最大性能，请重做，这样您就不需要返回每一列，只返回需要的内容，例如：

_contexto.FluxoDeCaixa.Select(t => new { t.DatFluxo , t.DatVencimento}).Where ....
于 2013-06-25T03:16:39.597 回答