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38results about How to "Improve query processing efficiency" patented technology
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Hadoop-based mass stream data storage and query method and system
InactiveCN101996250AReduce data volumeQuick filterSpecial data processing applicationsStreaming dataClustered data
The invention discloses a Hadoop-based mass stream data storage and query method and a Hadoop-based mass stream data storage and query system. The method comprises the following steps of: constructing a segmented column cluster type storage structure; sequentially storing stream data as column cluster records, compressing the column cluster records from front to back to obtain compressed data pages, writing each compressed data page into a piece of column cluster data, and simultaneously additionally writing the page outline information of the compressed data pages into the tail ends of the column cluster data to obtain an integrated data segment; and in the process of executing query statements, constructing a scan table according to filtering restraints by utilizing the page outline information at the tail ends of data segments to quickly filter the data.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI
Phrase extraction using subphrase scoring
ActiveUS8166045B1Improve query processing efficiencyReduce storage requirementsWeb data indexingDigital data processing detailsInformation retrievalPhrase extraction
An information retrieval system uses phrases to index, retrieve, organize and describe documents. Phrases are extracted from the document collection. Documents are the indexed according to their included phrases, using phrase posting lists. The phrase posting lists are stored in an cluster of index servers. The phrase posting lists can be tiered into groups, and sharded into partitions. Phrases in a query are identified based on possible phrasifications. A query schedule based on the phrases is created from the phrases, and then optimized to reduce query processing and communication costs. The execution of the query schedule is managed to further reduce or eliminate query processing operations at various ones of the index servers.
Owner:GOOGLE LLC
Update method of mobile object location based on traffic network and GPS
InactiveCN101128051AGuaranteed accuracyReduce calculation errorsBeacon systems using radio wavesPosition fixationObject basedTraffic network
The utility model discloses an updating method for a moving object based on the road transportation network and GPS, aiming at enabling a central server to trace the former and current position of the moving objects. The utility model is characterized in that the moving object uses GPS to measure the latest running data continuously, through matching with the transportation network, the coordinate of the latitude and the longitude and the direction data are converted into the data format based on the road network, then the current running vector is compared with the running data submitted by the updating on the last position according to the principle of the inertia, and the position updating condition is determined, the current running vector of the moving object is reported to the central server only when the moving object does not keep running as the principle of the inertia. Additionally, the utility model optimizes the updating of the position in the road crossing, only one time position updating of the moving object is performed at most in the road crossing. The utility model has advantages of reducing the communication frequency and improving the data processing efficiency under the premises of securing the processing precision compared with the prior art.
Owner:INST OF SOFTWARE - CHINESE ACAD OF SCI
Query processing method and device
InactiveCN106610999AImprove query processing efficiencySemi-structured data queryingSpecial data processing applicationsXQueryResult set
The invention provides a query processing method and device. The method comprises the steps of: receiving a query statement comprising an XQuery query statement; performing grammar analysis on the query statement to generate a grammar tree, wherein the grammar tree is a tree representation form of grammar structures for inquiring source codes of the statement, and each node on the grammar tree expresses a grammar structure included in the query statement; performing sub tree splitting on the grammar tree to obtain sub trees, wherein the nodes included in each sub tree constitute a sub query statement; executing the sub query statements corresponding to the sub trees respectively in parallel to obtain sub query result sets corresponding to the sub trees respectively; merging the sub query result sets, and outputting a query result corresponding to the query statement. Sub tree splitting is performed on the grammar tree corresponding to the query statement to split the query statement into a plurality of sub query statements, the sub query statements are executed in parallel, and the execution results of the sub query statements are merged to obtain a query result of the query statement, so that the query processing efficiency is improved.
Owner:PEKING UNIV FOUNDER GRP CO LTD +2
Virtual cursors for XML joins
ActiveUS20070112813A1Increase XML query processing efficiencyImprove performanceDigital data information retrievalDigital data processing detailsProcessing costComputer science
A system, method, and computer program product to improve XML query processing efficiency with virtual cursors. Structural joins are a fundamental operation in XML query processing, and substantial work exists on index-based algorithms for executing them. Two well-known index features—path indices and ancestor information—are combined in a novel way to replace at least some of the physical index cursors in a structural join with virtual cursors. The position of a virtual cursor is derived from the path and ancestor information of a physical cursor. Virtual cursors can be easily incorporated into existing structural join algorithms. By eliminating index I / O and the processing cost of handling physical inverted lists, virtual cursors can improve the performance of holistic path queries by an order of magnitude or more.
Owner:TWITTER INC
Joint query adaptive processing method for grid database
InactiveCN101739451AImprove estimation accuracyDynamic adjustment is timely and accurateSpecial data processing applicationsQuery planProcessing cost
The invention relates to a joint query adaptive processing method for grid database, belonging to the field of joint query technology of grid database. The method sequentially comprises three parts, including a sampling calculation method, an optimal execution route acquisition method and a query pipeline dynamic adjustment method. The sampling calculation method comprises updating, on the basis of a cost model formula, query selectivity, inter-node network bandwidth and the processing cost value of nodes for single tuple, and calculating the processing cost of updating stages of each candidate plan; the optimal execution route acquisition method comprises finding out the minimal maximum flow route (the optimal execution route) between a starting point and an endpoint according to a connected graph formed by grids; if the optimal execution route is not the current execution route, the query plan is adjusted by the query pipeline dynamic adjustment method. Taking the dynamic characteristics of a grid environment in which the grid database is positioned into sufficient account, the method achieves high estimation precision of query processing cost, timely and accurately adjusts the query plan and effectively enhances the efficiency of query processing.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Query request service method for DNS (Domain Name System) recursive server
ActiveCN103685168AImprove query processing efficiencyAchieve isolationTransmissionSpecial data processing applicationsNetwork packetDomain Name System
The invention discloses a query request service method for a DNS (Domain Name System) recursive server, and belongs to the technical field of networks. The method comprises the following steps: 1) dividing cache of the DNS recursive server into a credible cache area and an incredible cache area; 2) looking up whether matched resources exist in a resource record of the credible cache area after the recursive server receives a query request; if yes, returning the matched resource record to a query terminal, and if not, sending a query request to an authorized server; 3) monitoring the responded data package arrival rate of the query request by the recursive server; 4) putting the responded data package of the query request in the incredible cache area by the recursive server if the responded data package arrival rate exceeds a credible threshold; sending a query request again to the authorized server if the responded data package arrival rate does not exceed the credible threshold, sending the obtained DNS resource record to the query terminal, and adding into the credible cache area. According to the invention, the possibility of caching poisoning is reduced, and the efficiency of query is ensured.
Owner:CHINA INTERNET NETWORK INFORMATION CENTER
Vehicle condition information query method and device
ActiveCN103559274AImprove query processing efficiencyDeterministicSpecial data processing applicationsTime informationCloud storage
The invention provides a vehicle condition information query method and a vehicle condition information query device. The method comprises the steps that a management platform receives a query request sent from a user, wherein the query request comprises a vehicle logo and time information to be queried; the management platform acquires a local storage index table corresponding to the vehicle logo, and time logo, corresponding to the vehicle logo, of a vehicle condition information fragment uploaded to a cloud storage platform by vehicle-mounted equipment is stored in the local storage index table; the management platform determines the storage position of the vehicle condition information corresponding to the time information according to the local storage index table; the management platform acquires the vehicle condition information corresponding to the query request from the determined storage position. The storage position of the vehicle condition information to be queried is determined by the local storage index table, so when the vehicle condition information to be queried is determined to be stored at the cloud storage platform, the cloud storage platform can execute the operation for searching the vehicle condition information to be queried, the query operation of the cloud storage platform has larger certainty, and the query treating efficiency of the vehicle condition information is favorably improved.
Owner:CHINA UNITED NETWORK COMM GRP CO LTD
Sensor data locating
ActiveUS20130311480A1Reduce spacingReduce wasteDigital data processing detailsFile access structuresFeature parameterData mining
A method, an apparatus, and a system for locating sensor data. The method includes the steps of: obtaining an index table; intercepting a query for sensor data in runtime; extracting a characteristic parameter from a query condition; locating a block identifier of matching sensor data storage blocks in the index table by using the characteristic parameter; and loading the storage blocks into a memory space of a working processor; where the index table contains mapping relationships between block identifiers of sensor data storage blocks and characteristic attributes of sensor data.
Owner:IBM CORP
Method for protecting position privacy based on cache
InactiveCN108280162AEnsure location privacy and securityIncrease speedSpecial data processing applicationsUser privacyClient-side
The invention provides a method for protecting position privacy based on a cache. According to the current position of a mobile user, information point data quite high in using possibility in future is cached, a client side first retrieves the local cache to solve user inquiry, the cache misses the hit, then the inquiry is sent to an LBS server, the processing rate of inquiry is increased, meanwhile, the communication frequency between the client side and the server is reduced, and user privacy protection is enhanced. The invention further provides a distance hierarchical tree index structureand a maximum distance replacement algorithm suitable for the cache. The rate can be effectively increased when the cache is retrieved, and the cache hit ratio is increased. The method is simple in realization process and easy to operate.
Owner:CENT SOUTH UNIV
Variable search query vertical access
ActiveCN105359140AImprove query processing efficiencyData processing applicationsSpecial data processing applicationsSocial webThreshold number
In one embodiment, a method includes receiving from a user of an online social network a search query input comprising a character string having a number of characters; accessing one or more verticals that each store objects associated with the online social network, where if the number of characters is less than or equal to a threshold number, then accessing a first set of verticals, and if the number of characters is greater than the threshold number, then accessing the first set of verticals and a second set of verticals; searching each accessed vertical to identify one or more objects associated with the vertical that substantially match the character string; and sending to the user references to the identified objects.
Owner:META PLATFORMS INC
Vehicle state management method based on memory database
ActiveCN102201013AMeet state management needsProcessing speedData processing applicationsSpecial data processing applicationsIn-memory databaseVirtual memory
The invention provides a novel vehicle state management method based on a memory database, comprising the steps of: mapping a system memory into a virtual disc in a system by using a virtual memory disc technology, establishing a vehicle state database under a database storage path, transplanting the vehicle state database to the virtual memory disc, and establishing a vehicle state data table and a storage process according to the actual service requirements in a GPS management system so as to maintain vehicle state data in the GPS management system, wherein complicated logic relations can be realized with a storage process algorithm, without converting the complicated logic relations into relation of key and value in one-to-one correspondence. By use of the vehicle state management method based on the memory database, million orders of magnitude vehicle state management requirements in the GPS management system can be satisfied.
Owner:XIAMEN YAXON NETWORKS CO LTD
Data synchronization method and system
ActiveCN105653652AImprove user experienceImprove query response speedSpecial data processing applicationsData synchronizationData operations
The invention discloses a data synchronization method and system, and belongs to the technical field of data synchronization. The method comprises the following steps: S1: obtaining a data operation request and the query time of data to be operated; S2: according to the corresponding query time, containing the data operation request in a request batch of a corresponding time slot; and S3: in a first storage unit, inquiring to obtain a data size contained in the time slot corresponding to one request batch, judging whether the data size is greater than a preset data size or not, dividing the data to be operated into a plurality of data batches by the preset data size as a unit if the data size is greater than the preset data size, transmitting each data batch to a second storage unit, and otherwise, transmitting all data to be operated to the second storage unit. The system comprises a first storage unit, a setting unit, an acquisition unit, a division unit, a query unit, a judgment unit and a processing unit. The technical scheme has the beneficial effects that query response speed is improved, and the use experience of a user is improved.
Owner:SHANGHAI HANDPAY INFORMATION & TECH
Market data processing method and device, controller and medium
InactiveCN109710182AReduce the time consumed by reading and writingImprove reliabilityInput/output to record carriersFinanceData processingData mining
The invention relates to a market data processing method and device, a controller and a medium, and the method comprises the steps: obtaining market hot data, the market hot data being market data which can be updated within a preset time; storing the market hot data into a cache, and updating the market hot data in the cache in real time; Wherein the market hot data are converted into market colddata, and the market cold data are market data which are not updated within preset time; and storing the market cold data into a database. According to the invention, the throughput and reliability of market data processing are improved, and the delay of market data processing is reduced.
Owner:北京向上一心科技有限公司
Resource optimization method for structured query and database query system
ActiveCN107918676AAvoid occupyingAvoid wastingSpecial data processing applicationsHardware modulesQuery statement
The invention relates to the technical field of embedded databases, in particular to a resource optimization method for structured query and a database query system. The resource optimization method for the structured query includes the steps of acquiring multiple query statements, and configuring hardware modules used for query processing according to the query statements. The database query system includes an instruction acquisition module for acquiring the query statements and a query processing module for configuring the hardware modules used for query processing according to the query statements. According to the resource optimization method for the structured query and the system, the hardware modules used for completing query processing can be dynamically adjusted according to the queuing condition of current query statements to be processed, so that the hardware module resources are reasonably arranged, and the query efficiency is improved.
Owner:LENOVO (BEIJING) LTD
Monochrome mutual nearest neighbor query processing method for uncertain spatial data
InactiveCN105787076AExcellent time costExcellent number of visitsSpecial data processing applicationsNear neighborR-tree
The invention provides a monochrome mutual nearest neighbor query processing method for uncertain spatial data. The method includes the steps that an R tree is subjected to traversal, a nearest neighbor candidate set nnq of a query object q is obtained, and pruning nodes and objects in the process are preserved in a minimum pile Hrfn; objects in the nnq are inserted into the Hrfn; elements in the Hrfn are inserted into a set Sstemp; the Hrfn is subjected to traversal, and a reverse nearest neighbor candidate set rnnq of the q is obtained; the intersection of the nnq and the rnnq is solved to serve as the mutual nearest neighbor candidate set mnnq of the q; for each object o in the mnnq, the set Sstemp is subjected to traversal, and the nearest neighbor candidate set nno of the os is queried; the union set of the nno and the nnq is solved, and a probability calculation list of the os is obtained; the probability value of each object in the mnnq is calculated; the object with the probability value larger than the threshold value serves as the result and is returned. Compared with an existing method, the method is high in operation efficiency, low in I / O cost, short in query time and capable of improving query processing efficiency when used for processing corresponding query questions in LBS.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Virtual cursors for XML joins
ActiveUS7685138B2Improve query processing efficiencyImprove performanceDigital data information retrievalDigital data processing detailsProcessing costComputer science
A system, method, and computer program product to improve XML query processing efficiency with virtual cursors. Structural joins are a fundamental operation in XML query processing, and substantial work exists on index-based algorithms for executing them. Two well-known index features—path indices and ancestor information—are combined in a novel way to replace at least some of the physical index cursors in a structural join with virtual cursors. The position of a virtual cursor is derived from the path and ancestor information of a physical cursor. Virtual cursors can be easily incorporated into existing structural join algorithms. By eliminating index I / O and the processing cost of handling physical inverted lists, virtual cursors can improve the performance of holistic path queries by an order of magnitude or more.
Owner:TWITTER INC
Area query processing method and device for large-scale vector map data
ActiveCN109977190AAvoid the problem of inconsistent query processing resultsQuery processing precision is controllableStill image data queryingVectoral format still image dataVector mapData mining
The embodiment of the invention discloses an area query processing method and device for the large-scale vector map data. The method comprises the following steps of dividing, stacking and analyzing amulti-stage vector map data layer and a natural condition attribute to form a composite data layer; calculating the area of each pattern spot of the composite data layer; constructing a gridding datalayer surface comprising a plurality of grid units on the basis of the gridding data layer surface; calculating a summary area of each natural condition attribute of a plurality of stages of land types in the gridding data level; gathering the gridding data level by level to form a pyramid type grid level; calculating the attribute area of each grid unit in the grid level corresponding to the query processing precision in the query processing range to form a query processing range attribute area list; and outputting a result of summarizing the areas in the list according to the query processing constraint condition. According to the grid hierarchy with controllable pyramid type query processing precision, the grid hierarchy corresponding to the query processing precision is selected, so that the query processing efficiency can be greatly improved, and various query processing requirements can be better met.
Owner:CHINESE ACAD OF SURVEYING & MAPPING
Multi-medicine sharing query method, mobile terminal and storage medium
PendingCN113742443ASolve complexitySolve problems that may be faced in multi-drug sharing scenariosDrug and medicationsDrug referencesOld patientsDrug utilisation
The invention discloses a multi-medicine sharing query method. The multi-medicine sharing query method comprises the following steps: constructing a query graph according to query conditions; segmenting the query graph to obtain a plurality of query sub-graphs; and querying in the knowledge graph according to the plurality of query sub-graphs and returning a drug use query result. According to the multi-medicine sharing query method, massive disease medicine data and complexity among the disease medicine data are managed in a knowledge graph mode, the query conditions are constructed into the query graph, and the query graph is used for searching in the data graph of the knowledge graph; the problems possibly confronted in complex multi-disease coexistence and multi-medicine sharing scenes of old patients are effectively solved, and the query processing efficiency is improved by segmenting the query graph into the query sub-graphs. The invention further discloses a mobile terminal and a storage medium.
Owner:BOE TECH GRP CO LTD
Hadoop-based mass stream data storage and query method and system
InactiveCN101996250BReduce data volumeQuick filterSpecial data processing applicationsStreaming dataClustered data
The invention discloses a Hadoop-based mass stream data storage and query method and a Hadoop-based mass stream data storage and query system. The method comprises the following steps of: constructing a segmented column cluster type storage structure; sequentially storing stream data as column cluster records, compressing the column cluster records from front to back to obtain compressed data pages, writing each compressed data page into a piece of column cluster data, and simultaneously additionally writing the page outline information of the compressed data pages into the tail ends of the column cluster data to obtain an integrated data segment; and in the process of executing query statements, constructing a scan table according to filtering restraints by utilizing the page outline information at the tail ends of data segments to quickly filter the data.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI
Multi-service log data storage processing and query system and method
ActiveCN103902537BAvoid wastingEasy to handleSpecial data processing applicationsDatabase indexingOperating systemData bank
Owner:NEW SINGULARITY INT TECHN DEV
Moving object range query method
ActiveCN107357820AImprove query processing efficiencyMeet query needsSpecial data processing applicationsPerformance computingUser input
The embodiment of the invention provides a moving object range query method, and belongs to the field of high-performance computing and the field of databases. The moving object range query method includes: caching, through a buffer, the moving object update data detected in real time and query data input by users; constructing a grid index for the moving object update data and the query data through a multi-core CPU to enable the moving object update data and the query data, which correspond to each other therein, to be stored in the same cells; and carrying out parallel computing on the moving object update data and the query data in each cell in a grid through a GPU (Graphics Processing Unit). According to the embodiment of the invention, characteristics of a large memory, the multi-core CPU and the GPU are fully exerted, thus the query processing efficiency of moving objects is improved, and user query demands of a location based service (LBS) under big data can be more satisfied.
Owner:CHINA SHENHUA ENERGY CO LTD +2
Distributed parallel Skyline query method based on vertical dividing mode
ActiveCN102323957BLoad balancingImprove query processing efficiencySpecial data processing applicationsFully developedParallel computing
The invention discloses a distributed parallel Skyline query method based on a vertical dividing mode and aims to provide a new Skyline query method for fully developing the parallelism of Skyline query processing and improving efficiency. The invention adopts the technical scheme that: the method comprises the following steps that: a distributed parallel computing environment which consists of acoordination node and N computing nodes is constructed, wherein the coordination node has a task scheduling program and a result analysis processing program, and the computing nodes have query processing programs; the coordination node executes the task scheduling program and distributes a Skyline query processing task to each computing node; each computing node executes the query processing program, receives the Skyline query processing task from the coordination node and performs Skyline query processing; and the coordination node executes the result analysis processing program to collect aSkyline set LS of all computing nodes and performs Skyline query processing on the Skyline set LS to obtain a final Skyline query result. By adoption of the method, load balancing between the computing modes can be effectively guaranteed, the accuracy of the Skyline query result is guaranteed, and query efficiency is improved.
Owner:NAT UNIV OF DEFENSE TECH
Vehicle state management method based on memory database
ActiveCN102201013BMeet state management needsImprove query processing efficiencySpecial data processing applicationsIn-memory databaseVirtual memory
The invention provides a novel vehicle state management method based on a memory database, comprising the steps of: mapping a system memory into a virtual disc in a system by using a virtual memory disc technology, establishing a vehicle state database under a database storage path, transplanting the vehicle state database to the virtual memory disc, and establishing a vehicle state data table and a storage process according to the actual service requirements in a GPS management system so as to maintain vehicle state data in the GPS management system, wherein complicated logic relations can be realized with a storage process algorithm, without converting the complicated logic relations into relation of key and value in one-to-one correspondence. By use of the vehicle state management method based on the memory database, million orders of magnitude vehicle state management requirements in the GPS management system can be satisfied.
Owner:XIAMEN YAXON NETWORKS CO LTD
Update method of mobile object location based on traffic network and GPS
InactiveCN100542330CGuaranteed Acquisition AccuracyReduce collection frequencyBeacon systems using radio wavesPosition fixationObject basedMotion vector
In order to enable the central server to track the past and present positions of the mobile object, the present invention provides a method for updating the position of the mobile object based on the traffic road network and GPS: the mobile object uses GPS equipment to continuously measure its latest operating parameters, The matching of the road network converts the latitude and longitude position and direction data into a data representation based on the road network, and then according to the "inertia principle", compares the current running vector with the running vector submitted during the last position update, and judges the position update. condition, the current running vector is reported to the central server only when the moving object no longer maintains the inertial running rule. In addition, the present invention also optimizes the position update for the intersection, so that the mobile object only performs position update once in the intersection area at most. Compared with the existing location update method, this method can reduce the communication frequency and improve the efficiency of data processing under the premise of ensuring the processing accuracy.
Owner:INST OF SOFTWARE - CHINESE ACAD OF SCI
Query processing method and device
ActiveCN103678368BImprove query processing efficiencyError detection/correctionSpecial data processing applicationsData nodeClient-side
Provided are a query processing method and device. The method includes: sending first step information about executing a query request of a client to each data node in a system; receiving a failure message sent by at least one data node, the failure message being used for representing that the execution of the first step has failed or is abnormal; according to preset recoverable information, determining a second step for executing the query request, the second step being a starting step for re-executing the query request, and the recoverable information comprising a step without the need of being re-executed when re-executing the query request; and sending second step information to each data node. The query processing method and device provided in the embodiments of the present invention can improve the efficiency of query processing of a parallel database.
Owner:HUAWEI CLOUD COMPUTING TECH CO LTD
Variable search query vertical access
ActiveCN105359140BImprove query processing efficiencyData processing applicationsWeb data retrievalSocial webThreshold number
Owner:META PLATFORMS INC
Query Method of Moving Objects in Road Network
ActiveCN107341193BImprove query processing efficiencyMeet query needsGeographical information databasesSpecial data processing applicationsRoad networksTerm memory
An embodiment of the present invention provides a method for querying moving objects in a road network, belonging to the fields of high-performance computing and databases. The mobile object query method in the road network is used on the server side, and includes: obtaining mobile object update data and query data input by the user; using a multi-core CPU to update the acquired mobile object update data based on the node where the mobile object is located in the road network Perform clustered indexing and perform clustered indexing on the obtained query data based on the edge where the query data is located in the road network; and put the clustered indexed data into the GPU for calculation based on the nearest neighbor KNN algorithm to obtain query results. Embodiments of the present invention propose a method for querying moving objects in a high-throughput road network based on a new hardware environment, which fully utilizes the characteristics of large memory, multi-core CPU, and GPU, thereby improving the query processing efficiency of moving objects, and more Meet the user query requirements of location-based services under big data.
Owner:CHINA SHENHUA ENERGY CO LTD +2
Query method, client, server, and computer-readable medium
InactiveCN108984763BNo need to increase the quantityReduce the number of queriesSpecial data processing applicationsWeb data queryingDatabaseComputer program
Owner:深圳脉企大数据科技有限公司
A location-based privacy-preserving query processing method for mobile cloud platforms
The invention discloses a location-based privacy protection query processing method for a mobile cloud platform, which sequentially includes the following steps: system initialization, data master location encryption, user key generation, user key verification, user location encryption, distance calculation, and distance comparison and query results. The processing flow based on the location query in the present invention can handle the distance calculation and distance comparison operation requests by the mobile cloud service provider without exposing the location information of the data owner and data user, obtain the ciphertext result, and then send it to Data users, finally, only legitimate data users can obtain plaintext results. In the process, the present invention makes full use of cloud computing resources, and data users only need to spend very little computing cost to obtain services.
Owner:ANHUI UNIVERSITY
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