왼쪽의 외부 조인을 여러 개 수행하기 위해 엔티티 프레임 워크와 linq를 사용하지만 엔티티 프레임 워크를 통해 쿼리를 실행하는 데 3 초가 걸립니다.Entity Framework 영원히 참여하지 못함 (성능 문제)
나는 ((System.Data.Objects.ObjectQuery)query).ToTraceString();
을 사용하여 관리 스튜디오에서 SQL 문을 테스트하고 즉시 실행했습니다.
여기에 linq 코드가 있습니다. 주석
var query = from Inventory in db.INVENTORies
join NewInventory in db.NEW_INVENTORY on Inventory.Barcode equals NewInventory.Barcode into lj_1
from q_NewInventory in lj_1.DefaultIfEmpty()
join Categories in db.Categorys on Inventory.CAT_ID equals Categories.CAT_ID into lj_2
from q_Categories in lj_2.DefaultIfEmpty()
join SCategories in db.StoneCategories on Inventory.TP_ID equals SCategories.TP_ID into lj_3
from q_SubCategory in lj_3.DefaultIfEmpty()
join qSupplier in db.Suppliers on Inventory.SUP_ID equals qSupplier.SUP_ID into lj_4
from q_Supplier in lj_4.DefaultIfEmpty()
join qStatus in db.Statuses on Inventory.ST_ID equals qStatus.ST_ID into lj_5
from q_Status in lj_5.DefaultIfEmpty()
join q_Locations in db.Locations on Inventory.LOC_ID equals q_Locations.LOC_ID into lj_7
from q_locations in lj_7.DefaultIfEmpty()
join q_Stone1 in db.Stones on Inventory.StoneID_1 equals q_Stone1.STONE_ID into lj_s1
from q_stone1 in lj_s1.DefaultIfEmpty()
join q_Stone2 in db.Stones on Inventory.StoneID_2 equals q_Stone2.STONE_ID into lj_s2
from q_stone2 in lj_s2.DefaultIfEmpty()
join q_Stone3 in db.Stones on Inventory.StoneID_3 equals q_Stone3.STONE_ID into lj_s3
from q_stone3 in lj_s3.DefaultIfEmpty()
join q_Stone4 in db.Stones on Inventory.StoneID_4 equals q_Stone4.STONE_ID into lj_s4
from q_stone4 in lj_s4.DefaultIfEmpty()
join q_Stone5 in db.Stones on Inventory.StoneID_5 equals q_Stone5.STONE_ID into lj_s5
from q_stone5 in lj_s5.DefaultIfEmpty()
join q_Stone6 in db.Stones on Inventory.StoneID_6 equals q_Stone6.STONE_ID into lj_s6
from q_stone6 in lj_s6.DefaultIfEmpty()
join q_Stone7 in db.Stones on Inventory.StoneID_7 equals q_Stone7.STONE_ID into lj_s7
from q_stone7 in lj_s7.DefaultIfEmpty()
join q_Stone8 in db.Stones on Inventory.StoneID_8 equals q_Stone8.STONE_ID into lj_s8
from q_stone8 in lj_s8.DefaultIfEmpty()
join qMasterInventory in db.MASTERINVENTORies on q_NewInventory.InvItemNo equals qMasterInventory.INVITEMNO into lj_6
from q_MasterInventory in lj_6.DefaultIfEmpty()
where Inventory.Barcode == _Barcode
select new
{
inv_InvID = Inventory.INV_ID, inv_Barcode = Inventory.Barcode,
inv_catID = Inventory.CAT_ID, inv_SubCatID = Inventory.TP_ID, inv_Price = Inventory.ITEM_PRICE, inv_Cost = Inventory.ITEM_COST,
inv_PricePoint = Inventory.PricePoint, inv_StatusID = Inventory.ST_ID, inv_StID = Inventory.ST_ID, inv_SupID = Inventory.SUP_ID,
inv_LocID = Inventory.LOC_ID, inv_LabSupplier = Inventory.LabSupplier, inv_LabStone1 = Inventory.LabStone1, inv_LabCategory = Inventory.LabCategory,
inv_LabExtra = Inventory.LabExtra, inv_LabMadeIn = Inventory.LabMadeIn, inv_Width = Inventory.ChainThickNess, inv_Size = Inventory.ChainSize,
inv_Stone1 = Inventory.StoneID_1,inv_Stone2 = Inventory.StoneID_2,inv_Stone3 = Inventory.StoneID_3,inv_Stone4 = Inventory.StoneID_4,inv_Stone5 = Inventory.StoneID_5,inv_Stone6 = Inventory.StoneID_6,inv_Stone7 = Inventory.StoneID_7,inv_Stone8 = Inventory.StoneID_8,inv_Stone9 = Inventory.StoneID_9,inv_Stone10 = Inventory.StoneID_10,
stat_Status = q_Status.DESCRIPTION,
cat_Category = q_Categories.DESCRIPTION,
subCat_SubCategory = q_SubCategory.DESCRIPTION,
sup_Supplier = q_Supplier.Name,
loc_Location = q_locations.DESCRIPTION,
mas_SKU = q_MasterInventory.INVITEMNO,
mas_GUID = q_MasterInventory.ItemGUID,
stone1 = q_stone1.DESCRIPTION,
stone2 = q_stone2.DESCRIPTION,
stone3 = q_stone3.DESCRIPTION,
stone4 = q_stone4.DESCRIPTION,
stone5 = q_stone5.DESCRIPTION,
stone6 = q_stone6.DESCRIPTION,
stone7 = q_stone7.DESCRIPTION,
stone8 = q_stone8.DESCRIPTION,
};
통계 업데이트, 인덱스 다시 작성 ... –
모델에 문제가있는 것 같습니다. 돌 1-8?!? – Phill
나는이 쿼리를 SQL로 다시 쓰는 데 EF에서 시간을 소비했다고 생각한다. Mitch가 지적했듯이이 쿼리는 끔찍한 것으로 보이며 SQL에서 생성 된 SQL은 아마도 훨씬 더 나빠질 것입니다. 아마 당신은 당신의 모델/매핑을 살펴 봐야 할 것입니다. 아마도 성능 향상이있을 것입니다. – Pawel