我在MySQL 5.7和MariaDB-10.1.8上运行此查询。
SELECT
src.LINE AS ExcelRowNumber,
bveh.BaseVehicleID,
pa.Part_Id,
CASE
WHEN model.ModelID IS NOT NULL THEN model.ModelID
ELSE 0
END AS ModelID,
CASE
WHEN ebas.EngineBaseID IS NOT NULL THEN ebas.EngineBaseID
ELSE 0
END AS EngineBaseID,
CASE
WHEN smod.SubModelId IS NOT NULL THEN smod.SubModelId
ELSE 0
END AS SubModelId,
CASE
WHEN mbco.MfrBodyCodeID IS NOT NULL THEN mbco.MfrBodyCodeID
ELSE 0
END AS MfrBodyCodeID,
CASE
WHEN bndo.BodyNumDoorsID IS NOT NULL THEN bndo.BodyNumDoorsID
ELSE 0
END AS BodyNumDoorsID,
CASE
WHEN btyp.BodyTypeID IS NOT NULL THEN btyp.BodyTypeID
ELSE 0
END AS BodyTypeID,
CASE
WHEN dtyp.DriveTypeID IS NOT NULL THEN dtyp.DriveTypeID
ELSE 0
END AS DriveTypeID,
CASE
WHEN edes.EngineDesignationID IS NOT NULL THEN edes.EngineDesignationID
ELSE 0
END AS EngineDesignationID,
CASE
WHEN evin.EngineVINID IS NOT NULL THEN evin.EngineVINID
ELSE 0
END AS EngVINID,
CASE
WHEN fdco.FuelDeliveryConfigID IS NOT NULL THEN fdco.FuelDeliveryConfigID
ELSE 0
END AS FuelDeliveryConfigID,
CASE
WHEN fdty.FuelDeliveryTypeID IS NOT NULL THEN fdty.FuelDeliveryTypeID
ELSE 0
END AS FuelDeliveryTypeID,
CASE
WHEN fdst.FuelDeliverySubTypeID IS NOT NULL THEN fdst.FuelDeliverySubTypeID
ELSE 0
END AS FuelDeliverySubTypeID,
CASE
WHEN fsct.FuelSystemControlTypeID IS NOT NULL THEN fsct.FuelSystemControlTypeID
ELSE 0
END AS FuelSysControlTypeID,
CASE
WHEN fsde.FuelSystemDesignID IS NOT NULL THEN fsde.FuelSystemDesignID
ELSE 0
END AS FuelSystemDesignID,
CASE
WHEN aspi.AspirationID IS NOT NULL THEN aspi.AspirationID
ELSE 0
END AS AspirationID,
CASE
WHEN chty.CylinderHeadTypeID IS NOT NULL THEN chty.CylinderHeadTypeID
ELSE 0
END AS CylHeadTypeID,
CASE
WHEN ftyp.FuelTypeID IS NOT NULL THEN ftyp.FuelTypeID
ELSE 0
END AS FuelTypeID,
CASE
WHEN isty.IgnitionSystemTypeID IS NOT NULL THEN isty.IgnitionSystemTypeID
ELSE 0
END AS IgnitionSystemTypeID,
CASE
WHEN ttyp.TransmissionTypeID IS NOT NULL THEN ttyp.TransmissionTypeID
ELSE 0
END AS TransmissionTypeID,
CASE
WHEN tbas.TransmissionBaseID IS NOT NULL THEN tbas.TransmissionBaseID
ELSE 0
END AS TransmissionBaseID,
CASE
WHEN tcty.TransmissionControlTypeID IS NOT NULL THEN tcty.TransmissionControlTypeID
ELSE 0
END AS TransmissionControlTypeID,
CASE
WHEN tmco.TransmissionMfrCodeID IS NOT NULL THEN tmco.TransmissionMfrCodeID
ELSE 0
END AS TransmissionMfrCodeID,
CASE
WHEN tnsp.TransmissionNumSpeedsID IS NOT NULL THEN tnsp.TransmissionNumSpeedsID
ELSE 0
END AS TransmissionNumSpeedsID,
CASE
WHEN elec.ElecControlledID IS NOT NULL THEN elec.ElecControlledID
ELSE 0
END AS TransmissionElecControlledID,
CASE
WHEN bedtyp.BedTypeID IS NOT NULL THEN bedtyp.BedTypeID
ELSE 0
END AS BedTypeID,
CASE
WHEN blen.BedLengthID IS NOT NULL THEN blen.BedLengthID
ELSE 0
END AS BedLengthID,
CASE
WHEN bcon.BedConfigID IS NOT NULL THEN bcon.BedConfigID
ELSE 0
END AS BedConfigID,
CASE
WHEN wbas.WheelBaseID IS NOT NULL THEN wbas.WheelBaseID
ELSE 0
END AS WheelBaseID,
CASE
WHEN brtyf.BrakeTypeID IS NOT NULL THEN brtyf.BrakeTypeID
ELSE 0
END AS FrontBrakeTypeID,
CASE
WHEN brtyr.BrakeTypeID IS NOT NULL THEN brtyr.BrakeTypeID
ELSE 0
END AS RearBrakeTypeID,
CASE
WHEN stypf.SpringTypeID IS NOT NULL THEN stypf.SpringTypeID
ELSE 0
END AS FrontSpringTypeID,
CASE
WHEN stypr.SpringTypeID IS NOT NULL THEN stypr.SpringTypeID
ELSE 0
END AS RearSpringTypeID,
CASE
WHEN bsys.BrakeSystemID IS NOT NULL THEN bsys.BrakeSystemID
ELSE 0
END AS BrakeSystemID,
CASE
WHEN babs.BrakeABSID IS NOT NULL THEN babs.BrakeABSID
ELSE 0
END AS BrakeABSID,
CASE
WHEN steertyp.SteeringTypeID IS NOT NULL THEN steertyp.SteeringTypeID
ELSE 0
END AS SteeringTypeID,
CASE
WHEN steersys.SteeringSystemID IS NOT NULL THEN steersys.SteeringSystemID
ELSE 0
END AS SteeringSystemID,
CASE
WHEN regi.RegionID IS NOT NULL THEN regi.RegionID
ELSE 0
END AS RegionAbbrID,
CASE
WHEN ever.EngineVersionID IS NOT NULL THEN ever.EngineVersionID
ELSE 0
END AS EngineVersionID,
CASE
WHEN valv.ValvesID IS NOT NULL THEN valv.ValvesID
ELSE 0
END AS EngineValvesID,
CASE
WHEN pout.PowerOutputID IS NOT NULL THEN pout.PowerOutputID
ELSE 0
END AS PowerOutputID,
CASE
WHEN vtyp.VehicleTypeID IS NOT NULL THEN vtyp.VehicleTypeID
ELSE 0
END AS VehicleTypeID,
CASE
WHEN engMfr.MfrID IS NOT NULL THEN engMfr.MfrID
ELSE 0
END AS EngineMfrID,
IsValidable_yn AS IsValidable,
src.Year,
src.Product,
pl.Product_Line_Id,
src.PartNumber,
src.MfrLabel,
src.Qty,
src.Picture1,
src.Picture2,
src.DateAddedPart,
src.DateModifiedPart,
src.ApplicationNote1 AS Note1,
src.ApplicationNote2 AS Note2,
src.ApplicationNote3 AS Note3,
src.ApplicationNote4 AS Note4,
src.ApplicationNote5 AS Note5,
src.ApplicationNote6 AS Note6,
src.ApplicationNote7 AS Note7,
src.ApplicationNote8 AS Note8,
src.ApplicationNote9 AS Note9,
src.ApplicationNote10 AS Note10,
src.PublishingNote1,
src.PublishingNote2,
src.PublishingNote3,
src.PublishingNote4,
src.PublishingNote5,
src.Foot_note_numbers,
src.Foot_note_values,
CASE
WHEN transMfr.MfrID IS NOT NULL THEN transMfr.MfrID
ELSE 0
END AS TransmissionMfrID,
src.DateAdded,
src.DateModified,
src.SpecialInfo1,
src.SpecialInfo2,
src.SpecialInfo3,
src.LifeCycle_Pies_Code_read_only,
src.LifeCycle_Desc_short,
src.LifeCycle_Desc_Long_read_only,
src.PopCode,
src.PopCode_Desc_read_only,
src.AssetLogicalName,
src.AssetItemRef,
src.AssetItemOrder,
src.AssetFileName,
src.Action
FROM pcdmb_oevierol_oct26_pc75.ExcelToSQLTemporaryTable src
JOIN pcdmb_oevierol_oct26_pc75.Brand brand
ON brand.BrandId = CAST(1 AS UNSIGNED)
JOIN pcdmb_oevierol_oct26_pc75.Product_Line pl
ON src.Product = pl.Product_Line_En
AND pl.BrandID = brand.BrandID
LEFT JOIN pcdmb_oevierol_oct26_pc75.Part pa
ON src.PartNumber = pa.PartNumber
AND pa.Product_Line_Id = pl.Product_Line_Id
LEFT JOIN vcdb_sept2016.Make mak
ON mak.MakeName = src.Make
LEFT JOIN vcdb_sept2016.VehicleType vtyp
ON (vtyp.VehicleTypeName = src.VehicleType)
LEFT JOIN vcdb_sept2016.Model model
ON model.ModelName = src.Model
AND (model.VehicleTypeID = vtyp.VehicleTypeID
OR src.VehicleType = '')
JOIN vcdb_sept2016.BaseVehicle bveh
ON bveh.YearID = src.Year
AND bveh.MakeID = mak.MakeID
AND bveh.ModelID = model.ModelID
LEFT JOIN vcdb_sept2016.EngineBase ebas
ON (ebas.Liter = src.EngineLiters)
AND (ebas.CC = src.EngineCC)
AND (ebas.CID = src.EngineCID)
AND (ebas.Cylinders = src.EngineCylinder)
AND (ebas.BlockType = src.EngineBlock)
AND (ebas.EngBoreIn = src.EngBoreInch)
AND (ebas.EngBoreMetric = src.EngBoreMetric)
AND (ebas.EngStrokeIn = src.EngStrokeInch)
AND (ebas.EngStrokeMetric = src.EngStrokeMetric)
LEFT JOIN vcdb_sept2016.SubModel smod
ON (smod.SubmodelName = src.Submodel)
LEFT JOIN vcdb_sept2016.MfrBodyCode mbco
ON (mbco.MfrBodyCodeName = src.MfrBodyCode)
LEFT JOIN vcdb_sept2016.BodyNumDoors bndo
ON (bndo.BodyNumDoors = src.BodyNumDoors)
LEFT JOIN vcdb_sept2016.BodyType btyp
ON (btyp.BodyTypeName = src.BodyType)
LEFT JOIN vcdb_sept2016.DriveType dtyp
ON (dtyp.DriveTypeName = src.DriveType)
LEFT JOIN vcdb_sept2016.EngineDesignation edes
ON (edes.EngineDesignationName = src.EngineDesignation)
LEFT JOIN vcdb_sept2016.EngineVIN evin
ON (evin.EngineVINName = src.EngineVIN)
LEFT JOIN vcdb_sept2016.FuelDeliveryType fdty
ON (fdty.FuelDeliveryTypeName = src.FuelDeliveryType)
LEFT JOIN vcdb_sept2016.FuelDeliverySubType fdst
ON (fdst.FuelDeliverySubTypeName = src.FuelDeliverySubType)
LEFT JOIN vcdb_sept2016.FuelSystemControlType fsct
ON (fsct.FuelSystemControlTypeName = src.FuelSystemControlType)
LEFT JOIN vcdb_sept2016.FuelSystemDesign fsde
ON (fsde.FuelSystemDesignName = src.FuelSystemDesign)
LEFT JOIN vcdb_sept2016.FuelDeliveryConfig fdco
ON (fdco.FuelDeliveryTypeID = fdty.FuelDeliveryTypeID
AND fdco.FuelDeliverySubTypeID = fdst.FuelDeliverySubTypeID
AND fdco.FuelSystemControlTypeID = fsct.FuelSystemControlTypeID
AND fdco.FuelSystemDesignID = fsde.FuelSystemDesignID)
LEFT JOIN vcdb_sept2016.Aspiration aspi
ON (aspi.AspirationName = src.Aspiration)
LEFT JOIN vcdb_sept2016.CylinderHeadType chty
ON (chty.CylinderHeadTypeName = src.CylinderHeadType)
LEFT JOIN vcdb_sept2016.FuelType ftyp
ON (ftyp.FuelTypeName = src.FuelType)
LEFT JOIN vcdb_sept2016.IgnitionSystemType isty
ON (isty.IgnitionSystemTypeName = src.IgnitionSystemType)
LEFT JOIN vcdb_sept2016.Mfr transMfr
ON (transMfr.MfrName = src.TransmissionMfr)
LEFT JOIN vcdb_sept2016.TransmissionType ttyp
ON (ttyp.TransmissionTypeName = src.TransmissionType)
LEFT JOIN vcdb_sept2016.TransmissionControlType tcty
ON (tcty.TransmissionControlTypeName = src.TransmissionControlType)
LEFT JOIN vcdb_sept2016.TransmissionMfrCode tmco
ON (tmco.TransmissionMfrCode = src.TransmissionMfrCode)
LEFT JOIN vcdb_sept2016.TransmissionNumSpeeds tnsp
ON (tnsp.TransmissionNumSpeeds = src.TransmissionNumSpeeds)
LEFT JOIN vcdb_sept2016.ElecControlled elec
ON elec.ElecControlled = src.TransmissionElecControlled
LEFT JOIN vcdb_sept2016.TransmissionBase tbas
ON (tbas.TransmissionTypeID = ttyp.TransmissionTypeID
AND tbas.TransmissionNumSpeedsID = tnsp.TransmissionNumSpeedsID
AND tbas.TransmissionControlTypeID = tcty.TransmissionControlTypeID)
LEFT JOIN vcdb_sept2016.BedLength blen
ON (blen.BedLength = src.BedLength)
LEFT JOIN vcdb_sept2016.BedType bedtyp
ON (bedtyp.BedTypeName = src.BedType)
LEFT JOIN vcdb_sept2016.BedConfig bcon
ON (bcon.BedLengthID = blen.BedLengthID
AND bcon.BedTypeID = bedtyp.BedTypeID)
LEFT JOIN vcdb_sept2016.WheelBase wbas
ON (wbas.WheelBase = src.WheelBase)
LEFT JOIN vcdb_sept2016.BrakeType brtyf
ON (brtyf.BrakeTypeName = src.FrontBrakeType)
LEFT JOIN vcdb_sept2016.BrakeType brtyr
ON (brtyr.BrakeTypeName = src.RearBrakeType)
LEFT JOIN vcdb_sept2016.SpringType stypf
ON (stypf.SpringTypeName = src.FrontSpringType)
LEFT JOIN vcdb_sept2016.SpringType stypr
ON (stypr.SpringTypeName = src.RearSpringType)
LEFT JOIN vcdb_sept2016.BrakeSystem bsys
ON (bsys.BrakeSystemName = src.BrakeSystem)
LEFT JOIN vcdb_sept2016.BrakeABS babs
ON (babs.BrakeABSName = src.BrakeABS)
LEFT JOIN vcdb_sept2016.SteeringType steertyp
ON (steertyp.SteeringTypeName = src.SteeringType)
LEFT JOIN vcdb_sept2016.SteeringSystem steersys
ON (steersys.SteeringSystemName = src.SteeringSystem)
LEFT JOIN vcdb_sept2016.Region regi
ON (regi.RegionAbbr = src.Region)
LEFT JOIN vcdb_sept2016.EngineVersion ever
ON (ever.EngineVersion = src.EngineVersion)
LEFT JOIN vcdb_sept2016.Valves valv
ON (valv.ValvesPerEngine = src.EngineValves)
LEFT JOIN vcdb_sept2016.PowerOutput pout
ON (pout.HorsePower = src.PowerOutput)
LEFT JOIN vcdb_sept2016.Mfr engMfr
ON engMfr.MfrName = src.EngineMfr
WHERE NOT EXISTS (SELECT
LINE
FROM pcdmb_oevierol_oct26_pc75.ValidationErrTempTable temp
WHERE temp.LINE = src.LINE
AND isUK != 1
AND ErrType NOT LIKE 'Warning%')
此处还有解释：
id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 PRIMARY brand const PRIMARY PRIMARY 4 const 1 100 Using index 1 PRIMARY src ALL 299 100 Using where 1 PRIMARY vtyp index vtyp_x1 52 11 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY pl ALL BrandId 359 9.94 Using where; Using join buffer (Block Nested Loop) 1 PRIMARY ebas index ebas_x1 65 3710 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY smod index smod_x1 52 3574 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY mbco index mbco_ix1 12 3865 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY bndo index bndo_ix1 3 8 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY btyp index btyp_ix1 52 87 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY dtyp index dtyp_ix1 32 22 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY pa ref PART_UK_1,PRODUCT_LINE_ID PART_UK_1 773 pcdmb_oevierol_oct26_pc75.src.PartNumber,pcdmb_oevierol_oct26_pc75.pl.Product_Line_id 1 100 Using where; Using index 1 PRIMARY bveh ref IDX_BaseVehicle_MakeID,IDX_BaseVehicle_ModelID,IDX_BaseVehicle_YearID IDX_BaseVehicle_YearID 4 pcdmb_oevierol_oct26_pc75.src.Year 569 100 Using index condition 1 PRIMARY mak eq_ref PRIMARY PRIMARY 4 vcdb_sept2016.bveh.MakeID 1 100 Using where 1 PRIMARY model eq_ref PRIMARY,IDX_Model_VehicleTypeID PRIMARY 4 vcdb_sept2016.bveh.ModelID 1 100 Using where 1 PRIMARY edes index edes_ix1 32 2645 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY evin index evin_ix1 7 91 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY fdty index fdty_ix1 52 3 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY fdst index fdst_ix1 52 33 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY fsct index fsct_ix1 52 5 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY fsde index fsde_ix1 52 140 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY fdco eq_ref fdco_ix1,IDX_FuelDeliveryConfig_FuelDel1,IDX_FuelDeliveryConfig_FuelDel2,IDX_FuelDeliveryConfig_FuelSys3,IDX_FuelDeliveryConfig_FuelSys4 fdco_ix1 16 vcdb_sept2016.fdty.FuelDeliveryTypeID,vcdb_sept2016.fdst.FuelDeliverySubTypeID,vcdb_sept2016.fsct.FuelSystemControlTypeID,vcdb_sept2016.fsde.FuelSystemDesignID 1 100 Using index 1 PRIMARY aspi index aspi_ix1 32 9 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY chty index chty_ix1 32 8 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY ftyp index ftyp_ix1 32 13 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY isty index isty_ix1 32 6 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY transMfr index mfr_ix1 32 148 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY ttyp index ttyp_ix1 32 5 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY tcty index tcty_ix1 32 6 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY tmco index tmco_ix1 32 2250 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY tnsp index tnsp_ix1 3 13 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY elec index econ_ix1 3 5 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY tbas eq_ref transb_ix1,IDX_TransmissionBase_Transmiss1,IDX_TransmissionBase_Transmiss2,IDX_TransmissionBase_Transmiss3 transb_ix1 12 vcdb_sept2016.ttyp.TransmissionTypeID,vcdb_sept2016.tnsp.TransmissionNumSpeedsID,vcdb_sept2016.tcty.TransmissionControlTypeID 1 100 Using index 1 PRIMARY blen index blen_ix1 10 132 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY bedtyp index btyp_ix1 52 8 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY bcon ref IDX_BedConfig_BedLengthID,IDX_BedConfig_BedTypeID IDX_BedConfig_BedLengthID 4 vcdb_sept2016.blen.BedLengthID 1 100 Using where 1 PRIMARY wbas index wbas_ix1 12 394 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY brtyf index btyp_ix1 32 3 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY brtyr index btyp_ix1 32 3 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY stypf index styp_ix1 52 9 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY stypr index styp_ix1 52 9 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY bsys index bsys_ix1 32 8 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY babs index babs_ix1 32 5 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY steertyp index stee_ix1 32 4 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY steersys index ssys_ix1 32 4 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY regi index regi_ix1 3 3 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY ever index ever_ix1 22 117 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY valv index valv_ix1 3 24 100 Using where; Using index; Using join buffer (Block Nested Loop) 1 PRIMARY pout ALL 1074 100 Using where; Using join buffer (Block Nested Loop) 1 PRIMARY engMfr index mfr_ix1 32 148 100 Using where; Using index; Using join buffer (Block Nested Loop) 2 DEPENDENT SUBQUERY temp ALL 10 10 Using where
我的ExcelToSQLTemporaryTable（别名：src）有大约10 000行
在第一种情况下（MySQL 5.7），此查询在2小时后未完成，而在第二种情况下（MariaDb），此查询大约需要3分钟才能完成。问题是我的老板想要坚持MySQL 5.7所以我需要一些帮助来获得与MySQL 5.7中的MariaDB相同的性能。
答案 0 :(得分：1)
我有类似的问题。我的多个左联接查询运行得很慢。我尝试了多种类型的排序规则，并对涉及查询的所有DB表使用latin1_swedish_ci完成了这项工作。我还在选择查询中添加了一个主键列，以加快执行速度。它为我工作。
答案 1 :(得分：0)
在优化查询以获得划痕的同时尝试调整配置文件很长时间后，我发现我加入的数据库没有相同的字符集。当我解决这个问题时，一切都像魅力一样。
答案 2 :(得分：-1)
- 你没有写出mysql表中的数据量（记录数）。
- 正如你所说，你做了索引，所以我假设你做了正确的索引
- MySql使用不同类型的数据库引擎用于不同目的，从您的查询我可以看到您需要InoDb数据库引擎 它支持外键约束，
- 使用primay和foreign键（用于连接）来映射表格并让我知道它的速度有所提高吗？