Question

我有一个LINQ查询，尝试在oracle 11g上执行它。相同的查询在12c上执行完全正常，但它在11g上给出了以下错误。

ORA-00904: "Extent1"."ID": invalid identifier

00904. 00000 -  "%s: invalid identifier"

*Cause:   
*Action:

以下是生成的SQL。只显示给出错误的查询的特定部分，

SELECT 
  "Extent1".ID,
  (
    SELECT "top".ADMIT_DATE
    FROM 
          ( 
            SELECT "Project7".ADMIT_DATE
              FROM ( SELECT "Extent7".ADMIT_DATE FROM SYS.Table2 "Extent7" WHERE "Extent1".ID = "Extent7".ID )"Project7"
              ORDER BY "Project7".ADMIT_DATE ASC
          )  "top"
    WHERE ( ROWNUM <= 1) AND ROWNUM <= 1
  ) 
AS C1 FROM SYS.Table1 "Extent1";

有人可以解释11g中导致问题的原因!!此查询在12c上正常工作。

更新：这是linq查询。上面的SQL是这些linq查询生成的SQL的一部分。

var query = from p in context.Person
            where p.Meetings.Any() &&
            p.Vitals.Any(v => v.WT.HasValue && v.WT >= 20 && v.WT <= 300) &&
            p.Detentions.Any(d => ((d.DX_TYPE != null && d.DX_TYPE == "09") || (d.DX_TYPE == null && "09" == null)) && d.DX.StartsWith("V") && d.DX != null) &&
            p.Meetings.Any(meet => meet.Detentions.Any(d => ((d.DX_TYPE != null && d.DX_TYPE == "09") || (d.DX_TYPE == null && "09" == null)) && d.DX.StartsWith("250") && d.DX != null))
            select new
            {
                p.HISPANIC,
                p.RACE,
                StudentID = p.PersonID,
                AdmissionOn = p.Meetings.OrderBy(meet => meet.ADMIT_DATE).Select(meet => meet.ADMIT_DATE).FirstOrDefault(),
                AdmissionYear = p.Meetings.OrderBy(meet => meet.ADMIT_DATE).Select(meet => meet.ADMIT_DATE).FirstOrDefault().Year,
                AdmissionMonth = p.Meetings.OrderBy(meet => meet.ADMIT_DATE).Select(meet => meet.ADMIT_DATE).FirstOrDefault().Month
            };

var g = query.GroupBy(k => new { Hispanic = k.HISPANIC, Race = k.RACE, AdmissionYear = k.AdmissionYear })
            .Select(k => new { Hispanic = k.Key.Hispanic, Race = k.Key.Race, AdmissionYear = k.Key.AdmissionYear, Persons = k.Count() }).ToList();

Answer 1

问题是Oracle 11g不支持多个查询深度引用标识符。 SQL Server（由Microsoft创建）确实支持这一点，这就是为什么你的LINQ工作正常，但Oracle服务器不喜欢SQL。

本质上，它是oracle提供程序工具中的一个错误，它不会将您的LINQ转换为版本11g的有效SQL。

ORA-00904无效的标识符。查询适用于12c但不适用于11g

1 个答案: