Npgsql.PostgresException (0x80004005): 42883: 運算符不存在: jsonb #> text

Question

我有以下 SQL 查詢：

select distinct "Customers"."CustomerId"        as "CustomerId",
                "Customers"."FcmRegistrationId" as "FcmRegistrationId",
                "Customers"."FCMServerKey"      as "FCMServerKey",
                "Customers"."AppId"             as "AppId"
from "CustomerEvents"
         inner join "Customers" on "CustomerEvents"."CustomerId" = "Customers"."CustomerId"
where  "Customers"."AdvertiserId" = 16 and "Data" #> '{inner_id}' = '4249699';

它在我的 SQL 編輯器客戶端（DataGrip）中運行良好。 但是當我將它與C#一起使用時，我從這個問題的標題中得到了錯誤。

Npgsql.PostgresException (0x80004005): 42883: 運算符不存在: jsonb #> text

我將向您展示我的代碼：

public class PartnerApiServices : IPartnerApiService
{
    private readonly ApplicationDbContext _applicationDbContext;

    public PartnerApiServices(ApplicationDbContext applicationDbContext)
    {
        _applicationDbContext = applicationDbContext;
    }

    public IQueryable<CustomerForPartnerApiServiceModel> GetCustomerBySearchField(Advertiser advertiser, string searchValue)
    {
        var rawSql = @"
            select distinct ""Customers"".""CustomerId""        as ""CustomerId"",
                            ""Customers"".""FcmRegistrationId"" as ""FcmRegistrationId"",
                            ""Customers"".""FCMServerKey""      as ""FCMServerKey"",
                            ""Customers"".""AppId""             as ""AppId""
            from ""CustomerEvents""
                     inner join ""Customers"" on ""CustomerEvents"".""CustomerId"" = ""Customers"".""CustomerId""
            where  ""Customers"".""AdvertiserId"" = @AdvertiserId and ""Data"" #> @SearchField = @SearchValue"; 

        var res = _applicationDbContext.BySearchFieldCustomerApiModels.FromSql(rawSql,
            new NpgsqlParameter("SearchField", advertiser.SearchField),
            new NpgsqlParameter("SearchValue", searchValue),
            new NpgsqlParameter<int>("AdvertiserId", advertiser.AdvertiserId));

        return res;
    }
}

有什么想法可以正確傳遞SearchField和SearchValue嗎？

Answer 1

要使用文本參數，而不是使用#>使用#>> 。 前者需要一個jsonb參數，而后者需要一個text參數（參見 PostgreSQL 文檔）。

您的代碼在 DataGrip 中工作的原因是'{inner_id}'是直接嵌入在 SQL 中的無類型文字，因此 PostgreSQL 將其隱式轉換為jsonb 。 然而，當使用 Npgsql 的參數時，Npgsql 發送一個類型化的text參數（Npgsql 的參數（幾乎）總是類型化），因此 PostgreSQL 抱怨不匹配。

Answer 2

添加顯式類型轉換，以便 PostgreSQL 知道字符串文字將被解釋為數組：

var rawSql = @"
            ...
            where  ""Data"" #>> CAST(@SearchField AS text[]) = @SearchValue";