“输入结束时出现语法错误”-尝试从数据库启动存储过程时

问题描述

我正在用.net core编写程序，并尝试从数据库（Postgresql）启动存储过程。

I am writing in .net core and trying to launch stored procedure from database(Postgresql).

我收到一条错误消息，说输入结束时出现语法错误。
连接字符串正确（在调试过程中找到）。问题在于.FromSql（）方法语法。

I am getting an error saying there is an "syntax error at end of input".Connection string is right(found out during debugging). The problem is with .FromSql() method syntax.

这是代码：

List<ActivePackageForOpenBillingPeriod> activeUserPackagesForOpenBillingPeriod =null;

        using(var conn = new NpgsqlConnection("Host=localhost;Port=xxx;Database=postgres;Username=xxx;Password=xxx;TrustServerCertificate=xxx;ApplicationName=xxx;"))
        {

            var s = "create function \"GetActiveUserPackagesForOpenBillingPeriod({0})\"";
            activeUserPackagesForOpenBillingPeriod = context.ActivePackageForOpenBillingPeriods.FromSql(s,DateTime.Now).ToList();
        }

这是我尝试调用的存储过程

This is the stored procedure I am trying to call

    create function "GetActiveUserPackagesForOpenBillingPeriod"(date
timestamp without time zone) returns TABLE("Amount" numeric, "Package"
character varying, "User" text,"Account" int, "AcceptanceActID" int,
"HasChangedPackage" boolean)
    language plpgsql
as
$$
DECLARE
    BEGIN
      RETURN QUERY
        SELECT
            a."ID" AS "AccountId",
            u."ID" AS "UserId",
            up."PackageID",
            up."TotalAmount",
            CASE
                  WHEN count(DISTINCT tl."PackageID") IN (0,1)  THEN false
                  ELSE true
            END AS "HasChangedPackage"

        FROM public."Accounts" as a
            LEFT JOIN billing."TransactionHeaders" AS th ON th."AccountID" = a."ID"
            INNER JOIN security."Users" AS u ON u."AccountID"= a."ID"
            INNER JOIN billing."UserPackages" AS up ON up."UserID"=u."ID" AND COALESCE(th."Date", date) BETWEEN up."StartDate" AND COALESCE(up."EndDate", date)
            LEFT JOIN billing."TransactionLines" AS tl ON th."Id" = tl."TransactionHeaderID"

        WHERE th."AcceptanceActID" IS NULL AND a."StatusID"!=4 AND a."StatusID"!=3 AND up."StatusID"=1


        GROUP BY a."ID", u."ID", up."PackageID", up."TotalAmount";

END;
$$;

推荐答案

您正在运行的查询是错误的。

The query you are running is wrong. It is a mix between the function creation statement and a call to get its result.

也只能在函数名称中加上双引号，而不是参数

Also only the function name should be doublequoted, not the parameter

将查询更改为

var s = "SELECT * FROM \"GetActiveUserPackagesForOpenBillingPeriod\"({0})";

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