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POHow to speed up a complex SQL query with JOINs
 

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  1. POHow to speed up a complex SQL query with JOINs
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    <p>I am using the following query, and as you can see via the results below, it is taking 2+ hours to return the results. I'd love to know how I could speed this up -- I believe I've already built the indexes correctly but it is still taking an incredible amount of time to return this data.</p> <pre><code>EXPLAIN SELECT Import_Values.base_vehicle_id, Import_Values.qty, Import_Values.part_type_id, Import_Values.part_id, Import_Values.position_id, Import_Values.note, Parts.partterminologyname, BaseVehicle.YearID, Make.MakeName, Model.modelname, SubModel.SubModelName, EngineDesignation.EngineDesignationName, EngineVIN.EngineVINName, EngineBase.Liter, EngineBase.CC, EngineBase.CID, EngineBase.Cylinders, EngineBase.BlockType, EngineBase.EngBoreIn, EngineBase.EngBoreMetric, EngineBase.EngStrokeIn, EngineBase.EngStrokeMetric, FuelDeliveryType.FuelDeliveryTypeName, FuelDeliverySubType.FuelDeliverySubTypeName, FuelSystemControlType.FuelSystemControlTypeName, FuelSystemDesign.FuelSystemDesignName, Aspiration.AspirationName, CylinderHeadType.CylinderHeadTypeName, FuelType.FuelTypeName, IgnitionSystemType.IgnitionSystemTypeName, Mfr.MfrName, EngineVersion.EngineVersion, Valves.ValvesPerEngine, BedLength.BedLength, BedLength.BedLengthMetric, BedType.BedTypeName FROM Import_Values INNER JOIN BaseVehicle ON Import_Values.base_vehicle_id=BaseVehicle.BaseVehicleID INNER JOIN Parts ON Import_Values.part_type_id=Parts.PartTerminologyID INNER JOIN Make ON BaseVehicle.MakeID=Make.MakeID INNER JOIN Model ON BaseVehicle.ModelID=Model.ModelID INNER JOIN Vehicle ON Import_Values.base_vehicle_id=Vehicle.BaseVehicleID INNER JOIN SubModel ON Vehicle.SubModelID=SubModel.SubModelID INNER JOIN VehicleConfig ON Vehicle.VehicleID=VehicleConfig.VehicleID INNER JOIN EngineConfig ON VehicleConfig.EngineConfigID=EngineConfig.EngineConfigID INNER JOIN EngineDesignation ON EngineConfig.EngineDesignationID=EngineDesignation.EngineDesignationID INNER JOIN EngineVIN ON EngineConfig.EngineVINID=EngineVIN.EngineVINID INNER JOIN EngineBase ON EngineConfig.EngineBaseID=EngineBase.EngineBaseID INNER JOIN FuelDeliveryConfig ON EngineConfig.FuelDeliveryConfigID=FuelDeliveryConfig.FuelDeliveryConfigID INNER JOIN FuelDeliveryType ON FuelDeliveryConfig.FuelDeliveryTypeID=FuelDeliveryType.FuelDeliveryTypeID INNER JOIN FuelDeliverySubType ON FuelDeliveryConfig.FuelDeliverySubTypeID=FuelDeliverySubType.FuelDeliverySubTypeID INNER JOIN FuelSystemControlType ON FuelDeliveryConfig.FuelSystemControlTypeID=FuelSystemControlType.FuelSystemControlTypeID INNER JOIN FuelSystemDesign ON FuelDeliveryConfig.FuelSystemDesignID=FuelSystemDesign.FuelSystemDesignID INNER JOIN Aspiration ON EngineConfig.AspirationID=Aspiration.AspirationID INNER JOIN CylinderHeadType ON EngineConfig.CylinderHeadTypeID=CylinderHeadType.CylinderHeadTypeID INNER JOIN FuelType ON EngineConfig.FuelTypeID=FuelType.FuelTypeID INNER JOIN IgnitionSystemType ON EngineConfig.IgnitionSystemTypeID=IgnitionSystemType.IgnitionSystemTypeID INNER JOIN Mfr ON EngineConfig.EngineMfrID=Mfr.MfrID INNER JOIN EngineVersion ON EngineConfig.EngineVersionID=EngineVersion.EngineVersionID INNER JOIN Valves ON EngineConfig.ValvesID=Valves.Valvesid INNER JOIN BedConfig ON VehicleConfig.BedConfigID=BedConfig.BedConfigID INNER JOIN BedLength ON BedConfig.BedLengthID=BedLength.BedLengthID INNER JOIN BedType ON BedConfig.BedTypeID=BedType.BedTypeID </code></pre> <p>And the results...</p> <pre><code>+----+-------------+-----------------------+--------+-----------------------+---------+---------+-----------------------------------------------------------------+--------+-------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-----------------------+--------+-----------------------+---------+---------+-----------------------------------------------------------------+--------+-------------------+ | 1 | SIMPLE | VehicleConfig | ALL | NULL | NULL | NULL | NULL | 171375 | | | 1 | SIMPLE | Import_Values | ALL | base_vehicle_id | NULL | NULL | NULL | 18933 | Using join buffer | | 1 | SIMPLE | BedConfig | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.VehicleConfig.BedConfigID | 1 | | | 1 | SIMPLE | BedType | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.BedConfig.BedTypeID | 1 | | | 1 | SIMPLE | BedLength | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.BedConfig.BedLengthID | 1 | | | 1 | SIMPLE | EngineConfig | eq_ref | PRIMARY,EngineBaseID | PRIMARY | 4 | icarcare_importfeeds.VehicleConfig.EngineConfigID | 1 | | | 1 | SIMPLE | FuelType | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.FuelTypeID | 1 | | | 1 | SIMPLE | Valves | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.ValvesID | 1 | | | 1 | SIMPLE | EngineVIN | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.EngineVINID | 1 | | | 1 | SIMPLE | EngineVersion | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.EngineVersionID | 1 | | | 1 | SIMPLE | IgnitionSystemType | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.IgnitionSystemTypeID | 1 | | | 1 | SIMPLE | Mfr | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.EngineMfrID | 1 | | | 1 | SIMPLE | Aspiration | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.AspirationID | 1 | | | 1 | SIMPLE | FuelDeliveryConfig | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.FuelDeliveryConfigID | 1 | | | 1 | SIMPLE | FuelSystemDesign | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.FuelDeliveryConfig.FuelSystemDesignID | 1 | | | 1 | SIMPLE | FuelDeliverySubType | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.FuelDeliveryConfig.FuelDeliverySubTypeID | 1 | | | 1 | SIMPLE | EngineDesignation | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.EngineDesignationID | 1 | | | 1 | SIMPLE | EngineBase | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.EngineBaseID | 1 | | | 1 | SIMPLE | CylinderHeadType | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.EngineConfig.CylinderHeadTypeID | 1 | | | 1 | SIMPLE | Parts | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.Import_Values.part_type_id | 1 | Using where | | 1 | SIMPLE | FuelSystemControlType | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.FuelDeliveryConfig.FuelSystemControlTypeID | 1 | | | 1 | SIMPLE | BaseVehicle | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.Import_Values.base_vehicle_id | 1 | Using where | | 1 | SIMPLE | Make | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.BaseVehicle.MakeID | 1 | | | 1 | SIMPLE | Model | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.BaseVehicle.ModelID | 1 | | | 1 | SIMPLE | Vehicle | eq_ref | PRIMARY,BaseVehicleID | PRIMARY | 4 | icarcare_importfeeds.VehicleConfig.VehicleID | 1 | Using where | | 1 | SIMPLE | SubModel | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.Vehicle.SubModelID | 1 | | | 1 | SIMPLE | FuelDeliveryType | eq_ref | PRIMARY | PRIMARY | 4 | icarcare_importfeeds.FuelDeliveryConfig.FuelDeliveryTypeID | 1 | | +----+-------------+-----------------------+--------+-----------------------+---------+---------+-----------------------------------------------------------------+--------+-------------------+ 27 rows in set (2 hours 39 min 30.51 sec) </code></pre> <p>Is there anything I can do? I've tried analyzing the tables, optimizing them, etc. It just seems there must be more to do than let it run for 2 hours, lol.</p>
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    1. CODo you have indexes on your primary and foreign keys ?
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      1. USt-clausen.dk
    2. COI believe so, yes. Is there a query that I could use to double check?
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    3. CODo you have a database diagram that shows all the linkages between foreign keys and primary keys?
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      1. POHow to speed up a complex SQL query with JOINs
      1. USWalter Mitty
 

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