我正在将我们的数据访问层从Telerik ORM（不建议使用）转换为EF 6.它将连接到具有30个字符限制的Oracle 12c数据源。一些表名和列名正好是30个字符（如下例所示），有些更短。
Linq to Sql查询已经存在并且与Telerik一起工作，因为它使用列名称的别名为t1，t2等。而EF显然将原始列名称复制为别名。在大多数情况下，除了代码表连接，其中代码表的PK和父表的FK完全相同之外，它的工作原理完全相同，然后它将1加到alais列的末尾，从而使它成为31个字符。正如你猜测甲骨文抱怨的那样。
我需要找到一种方法来强制EF使用更短的别名，无论如何都可以这样做？
以下是Linq查询：
var dbElevationsHistory = (from elevationHist in dbContext.ElevationDataReadingJournals
join it in dbContext.MeasurementIssueTypes on elevationHist.MeasurementIssueTypeId equals it.MeasurementIssueTypeId into iType
from issueType in iType.DefaultIfEmpty()
join mt in dbContext.ElevationMeasureMethodTypes on elevationHist.ElevationMeasureMethodTypeId equals mt.ElevationMeasureMethodTypeId into mType
from methodType in mType.DefaultIfEmpty()
join at in dbContext.ElevationAccuracyTypes on elevationHist.ElevationAccuracyTypeId equals at.ElevationAccuracyTypeId into aType
from accuracyType in aType.DefaultIfEmpty()
join cAgency in dbContext.Organizations on elevationHist.CoopAgencyOrganizationId equals cAgency.OrganizationId into foundAgencies
from coopAgency in foundAgencies.DefaultIfEmpty()
where elevationHist.StationId == wellKey
select new { elevationHist, issueType, accuracyType, methodType, coopAgency })
.OrderByDescending(eh => eh.elevationHist.ModifiedDate)
.OrderByDescending(eh => eh.elevationHist.ElevationDataReadingJournalId);
它产生的sql查询：
SELECT
"Project1"."C1" AS "C1",
"Project1"."EWM_ELEVATION_DATA_READ_JRL_ID" AS "EWM_ELEVATION_DATA_READ_JRL_ID",
"Project1"."EWM_ELEVATION_DATA_READING_ID" AS "EWM_ELEVATION_DATA_READING_ID",
"Project1"."CRUD_TYPE" AS "CRUD_TYPE",
"Project1"."CRUD_DT" AS "CRUD_DT",
"Project1"."MEASUREMENT_DT" AS "MEASUREMENT_DT",
"Project1"."ORG_ID" AS "ORG_ID",
"Project1"."EWM_MEASUREMENT_ISSUE_TYPE_ID" AS "EWM_MEASUREMENT_ISSUE_TYPE_ID",
"Project1"."EWM_STATION_ID" AS "EWM_STATION_ID",
"Project1"."EWM_ELEV_MEASURE_METHOD_TYP_ID" AS "EWM_ELEV_MEASURE_METHOD_TYP_ID",
"Project1"."EWM_ELEVATION_ACCURACY_TYPE_ID" AS "EWM_ELEVATION_ACCURACY_TYPE_ID",
"Project1"."REFERENCE_POINT_ELEVATION" AS "REFERENCE_POINT_ELEVATION",
"Project1"."GROUND_SURFACE_ELEVATION" AS "GROUND_SURFACE_ELEVATION",
"Project1"."WATER_SURFACE_READING" AS "WATER_SURFACE_READING",
"Project1"."REFERENCE_POINT_READING" AS "REFERENCE_POINT_READING",
"Project1"."MANDATORY_READING" AS "MANDATORY_READING",
"Project1"."COMMENTS" AS "COMMENTS",
"Project1"."MODIFIED_DATE" AS "MODIFIED_DATE",
"Project1"."MODIFIED_USER" AS "MODIFIED_USER",
"Project1"."MODIFIED_PROC" AS "MODIFIED_PROC",
"Project1"."COOPERATING_AGENCY_ORG_ID" AS "COOPERATING_AGENCY_ORG_ID",
"Project1"."APPL_ID" AS "APPL_ID",
"Project1"."SUBMISSION_DATE" AS "SUBMISSION_DATE",
"Project1"."EWM_MEASUREMENT_ISSUE_TYPE_ID1" AS "EWM_MEASUREMENT_ISSUE_TYPE_ID1",
"Project1"."EWM_MEASURE_ISSUE_TYPE_CODE" AS "EWM_MEASURE_ISSUE_TYPE_CODE",
"Project1"."EWM_MEASURE_ISSUE_TYPE_DESC" AS "EWM_MEASURE_ISSUE_TYPE_DESC",
"Project1"."EWM_MEASURE_ISSUE_TYPE_ACTV" AS "EWM_MEASURE_ISSUE_TYPE_ACTV",
"Project1"."EWM_MEASURE_ISSUE_TYPE_ORDER" AS "EWM_MEASURE_ISSUE_TYPE_ORDER",
"Project1"."EWM_MEASURE_ISSUE_TYPE_CLASS" AS "EWM_MEASURE_ISSUE_TYPE_CLASS",
"Project1"."MODIFIED_DATE1" AS "MODIFIED_DATE1",
"Project1"."MODIFIED_USER1" AS "MODIFIED_USER1",
"Project1"."MODIFIED_PROC1" AS "MODIFIED_PROC1",
"Project1"."APPL_ID1" AS "APPL_ID1",
"Project1"."EWM_ELEVATION_ACCURACY_TYPE_ID1" AS "EWM_ELEVATION_ACCURACY_TYPE_ID1",
"Project1"."EWM_ELEVATION_ACCURACY_DESC" AS "EWM_ELEVATION_ACCURACY_DESC",
"Project1"."EWM_ELEVATION_ACCURACY_ACTV" AS "EWM_ELEVATION_ACCURACY_ACTV",
"Project1"."EWM_ELEVATION_ACCURACY_ORDER" AS "EWM_ELEVATION_ACCURACY_ORDER",
"Project1"."MODIFIED_DATE3" AS "MODIFIED_DATE2",
"Project1"."MODIFIED_USER3" AS "MODIFIED_USER2",
"Project1"."MODIFIED_PROC3" AS "MODIFIED_PROC2",
"Project1"."EWM_ELEVATION_ACCURACY_CD" AS "EWM_ELEVATION_ACCURACY_CD",
"Project1"."APPL_ID3" AS "APPL_ID2",
"Project1"."EWM_ELEV_MEASURE_METHOD_TYP_ID1" AS "EWM_ELEV_MEASURE_METHOD_TYP_ID1",
"Project1"."EWM_ELEV_MEASURE_METHOD_DESC" AS "EWM_ELEV_MEASURE_METHOD_DESC",
"Project1"."EWM_ELEV_MEASURE_METHOD_ACTV" AS "EWM_ELEV_MEASURE_METHOD_ACTV",
"Project1"."EWM_ELEV_MEASURE_METHOD_ORDER" AS "EWM_ELEV_MEASURE_METHOD_ORDER",
"Project1"."MODIFIED_DATE2" AS "MODIFIED_DATE3",
"Project1"."MODIFIED_USER2" AS "MODIFIED_USER3",
"Project1"."MODIFIED_PROC2" AS "MODIFIED_PROC3",
"Project1"."EWM_ELEV_MEASURE_METHOD_CD" AS "EWM_ELEV_MEASURE_METHOD_CD",
"Project1"."APPL_ID2" AS "APPL_ID3",
"Project1"."ORG_ID1" AS "ORG_ID1",
"Project1"."ORG_NAME" AS "ORG_NAME",
"Project1"."ORG_ABBR" AS "ORG_ABBR",
"Project1"."ORG_TYPE_ID" AS "ORG_TYPE_ID",
"Project1"."MODIFIED_DATE4" AS "MODIFIED_DATE4",
"Project1"."MODIFIED_USER4" AS "MODIFIED_USER4",
"Project1"."MODIFIED_PROC4" AS "MODIFIED_PROC4",
"Project1"."ORG_TIN" AS "ORG_TIN"
FROM ( SELECT
"Extent1"."EWM_ELEVATION_DATA_READ_JRL_ID" AS "EWM_ELEVATION_DATA_READ_JRL_ID",
"Extent1"."EWM_ELEVATION_DATA_READING_ID" AS "EWM_ELEVATION_DATA_READING_ID",
"Extent1"."CRUD_TYPE" AS "CRUD_TYPE",
"Extent1"."CRUD_DT" AS "CRUD_DT",
"Extent1"."MEASUREMENT_DT" AS "MEASUREMENT_DT",
"Extent1"."ORG_ID" AS "ORG_ID",
"Extent1"."EWM_MEASUREMENT_ISSUE_TYPE_ID" AS "EWM_MEASUREMENT_ISSUE_TYPE_ID",
"Extent1"."EWM_STATION_ID" AS "EWM_STATION_ID",
"Extent1"."EWM_ELEV_MEASURE_METHOD_TYP_ID" AS "EWM_ELEV_MEASURE_METHOD_TYP_ID",
"Extent1"."EWM_ELEVATION_ACCURACY_TYPE_ID" AS "EWM_ELEVATION_ACCURACY_TYPE_ID",
"Extent1"."REFERENCE_POINT_ELEVATION" AS "REFERENCE_POINT_ELEVATION",
"Extent1"."GROUND_SURFACE_ELEVATION" AS "GROUND_SURFACE_ELEVATION",
"Extent1"."WATER_SURFACE_READING" AS "WATER_SURFACE_READING",
"Extent1"."REFERENCE_POINT_READING" AS "REFERENCE_POINT_READING",
"Extent1"."MANDATORY_READING" AS "MANDATORY_READING",
"Extent1"."COMMENTS" AS "COMMENTS",
"Extent1"."MODIFIED_DATE" AS "MODIFIED_DATE",
"Extent1"."MODIFIED_USER" AS "MODIFIED_USER",
"Extent1"."MODIFIED_PROC" AS "MODIFIED_PROC",
"Extent1"."COOPERATING_AGENCY_ORG_ID" AS "COOPERATING_AGENCY_ORG_ID",
"Extent1"."APPL_ID" AS "APPL_ID",
"Extent1"."SUBMISSION_DATE" AS "SUBMISSION_DATE",
1 AS "C1",
"Extent2"."EWM_MEASUREMENT_ISSUE_TYPE_ID" AS "EWM_MEASUREMENT_ISSUE_TYPE_ID1",
"Extent2"."EWM_MEASURE_ISSUE_TYPE_CODE" AS "EWM_MEASURE_ISSUE_TYPE_CODE",
"Extent2"."EWM_MEASURE_ISSUE_TYPE_DESC" AS "EWM_MEASURE_ISSUE_TYPE_DESC",
"Extent2"."EWM_MEASURE_ISSUE_TYPE_ACTV" AS "EWM_MEASURE_ISSUE_TYPE_ACTV",
"Extent2"."EWM_MEASURE_ISSUE_TYPE_ORDER" AS "EWM_MEASURE_ISSUE_TYPE_ORDER",
"Extent2"."EWM_MEASURE_ISSUE_TYPE_CLASS" AS "EWM_MEASURE_ISSUE_TYPE_CLASS",
"Extent2"."MODIFIED_DATE" AS "MODIFIED_DATE1",
"Extent2"."MODIFIED_USER" AS "MODIFIED_USER1",
"Extent2"."MODIFIED_PROC" AS "MODIFIED_PROC1",
"Extent2"."APPL_ID" AS "APPL_ID1",
"Extent3"."EWM_ELEV_MEASURE_METHOD_TYP_ID" AS "EWM_ELEV_MEASURE_METHOD_TYP_ID1",
"Extent3"."EWM_ELEV_MEASURE_METHOD_DESC" AS "EWM_ELEV_MEASURE_METHOD_DESC",
"Extent3"."EWM_ELEV_MEASURE_METHOD_ACTV" AS "EWM_ELEV_MEASURE_METHOD_ACTV",
"Extent3"."EWM_ELEV_MEASURE_METHOD_ORDER" AS "EWM_ELEV_MEASURE_METHOD_ORDER",
"Extent3"."MODIFIED_DATE" AS "MODIFIED_DATE2",
"Extent3"."MODIFIED_USER" AS "MODIFIED_USER2",
"Extent3"."MODIFIED_PROC" AS "MODIFIED_PROC2",
"Extent3"."EWM_ELEV_MEASURE_METHOD_CD" AS "EWM_ELEV_MEASURE_METHOD_CD",
"Extent3"."APPL_ID" AS "APPL_ID2",
**"Extent4"."EWM_ELEVATION_ACCURACY_TYPE_ID" AS "EWM_ELEVATION_ACCURACY_TYPE_ID1"**,
"Extent4"."EWM_ELEVATION_ACCURACY_DESC" AS "EWM_ELEVATION_ACCURACY_DESC",
"Extent4"."EWM_ELEVATION_ACCURACY_ACTV" AS "EWM_ELEVATION_ACCURACY_ACTV",
"Extent4"."EWM_ELEVATION_ACCURACY_ORDER" AS "EWM_ELEVATION_ACCURACY_ORDER",
"Extent4"."MODIFIED_DATE" AS "MODIFIED_DATE3",
"Extent4"."MODIFIED_USER" AS "MODIFIED_USER3",
"Extent4"."MODIFIED_PROC" AS "MODIFIED_PROC3",
"Extent4"."EWM_ELEVATION_ACCURACY_CD" AS "EWM_ELEVATION_ACCURACY_CD",
"Extent4"."APPL_ID" AS "APPL_ID3",
"Extent5"."ORG_ID" AS "ORG_ID1",
"Extent5"."ORG_NAME" AS "ORG_NAME",
"Extent5"."ORG_ABBR" AS "ORG_ABBR",
"Extent5"."ORG_TYPE_ID" AS "ORG_TYPE_ID",
"Extent5"."MODIFIED_DATE" AS "MODIFIED_DATE4",
"Extent5"."MODIFIED_USER" AS "MODIFIED_USER4",
"Extent5"."MODIFIED_PROC" AS "MODIFIED_PROC4",
"Extent5"."ORG_TIN" AS "ORG_TIN"
FROM "EWM_ADM"."EWM_ELEVATION_DATA_READING_JRL" "Extent1"
LEFT OUTER JOIN "EWM_ADM"."EWM_MEASUREMENT_ISSUE_TYPE" "Extent2" ON "Extent1"."EWM_MEASUREMENT_ISSUE_TYPE_ID" = "Extent2"."EWM_MEASUREMENT_ISSUE_TYPE_ID"
LEFT OUTER JOIN "EWM_ADM"."EWM_ELEV_MEASURE_METHOD_TYP" "Extent3" ON "Extent1"."EWM_ELEV_MEASURE_METHOD_TYP_ID" = "Extent3"."EWM_ELEV_MEASURE_METHOD_TYP_ID"
LEFT OUTER JOIN "EWM_ADM"."EWM_ELEVATION_ACCURACY_TYPE" "Extent4" ON "Extent1"."EWM_ELEVATION_ACCURACY_TYPE_ID" = "Extent4"."EWM_ELEVATION_ACCURACY_TYPE_ID"
LEFT OUTER JOIN "BUS_ADM"."ORGANIZATION" "Extent5" ON "Extent1"."COOPERATING_AGENCY_ORG_ID" = "Extent5"."ORG_ID"
WHERE (("Extent1"."EWM_STATION_ID" = 52370) OR (("Extent1"."EWM_STATION_ID" IS NULL) AND (52370 IS NULL)))
) "Project1"
ORDER BY "Project1"."EWM_ELEVATION_DATA_READ_JRL_ID" DESC
有问题的行是这一行（在查询中标有星号，因为我无法加粗）。
"Extent4"."EWM_ELEVATION_ACCURACY_TYPE_ID" AS "EWM_ELEVATION_ACCURACY_TYPE_ID1"
正如您所看到的，它将1添加到别名中。我需要阻止或强制使用自定义别名。