CN106649340A - Condition filtering data access method and apparatus - Google Patents

Condition filtering data access method and apparatus Download PDF

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Publication number
CN106649340A
CN106649340A CN201510727521.1A CN201510727521A CN106649340A CN 106649340 A CN106649340 A CN 106649340A CN 201510727521 A CN201510727521 A CN 201510727521A CN 106649340 A CN106649340 A CN 106649340A
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Prior art keywords
operator
filter data
operating value
character string
condition
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曹志明
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Beijing Gridsum Technology Co Ltd
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Beijing Gridsum Technology Co Ltd
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Priority to CN201510727521.1A priority Critical patent/CN106649340A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24Querying
    • G06F16/245Query processing
    • G06F16/2453Query optimisation
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/22Indexing; Data structures therefor; Storage structures
    • G06F16/2228Indexing structures
    • G06F16/2246Trees, e.g. B+trees
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24Querying
    • G06F16/245Query processing
    • G06F16/2455Query execution

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Software Systems (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

The invention discloses a condition filtering data access method and apparatus, relates to the field of data operation, and mainly aims to enable a data table structure not to depend on the complexity of condition filtering data and realize that various types of condition filtering data can be stored only by a column of data in a database table. According to the main technical scheme, the method comprises the steps of decomposing original condition filtering data to generate condition filtering data of a ternary tree structure; translating the condition filtering data of the ternary tree structure into a character string containing an operator and an operation value, wherein the format of the character string is the operation value + the operator + the operation value, the operation value is a variable, a constant or the condition filtering data, and the operator includes a logic operator, an auxiliary operator and a comparison operator; and storing the character string in a database. The method and the apparatus are mainly used in a condition filtering data access process.

Description

The access method and device of condition filter data
Technical field
The present invention relates to data manipulation field, more particularly to a kind of access method and device of condition filter data.
Background technology
In software development, it usually needs preserve some condition filter data, such as " user of the age less than 18 years old ", " car speed is no more than 120km/h " etc..These data are critically important when needing to arrange alert if.At present, general conventional preservation method is that these condition filter data are saved directly in a table of database, and the design of the database table generally comprises three row:Data type, refers to " age ", " speed " etc.;Action type, refers to " being more than ", " being less than ", " being equal to " etc.;Operating value, refers to " 18 ", " 120 ".
Inventor, due to generally only three row in the database table, can only store some simple condition filter data when the preservation of filter data is crossed using above-mentioned condition, run into complex conditions and cross filter data and be difficult to meet.Such as, " age is less than 18 years old but more than 80 years old ", " area is Beijing and Shanghai Liang Ge cities ".Want to store complicated condition filter data using database table, condition filter data composition is more complicated, and database table structure is accomplished by more complicated.
The content of the invention
In view of this, the present invention provides a kind of method and device of condition filter data access, main purpose is the complexity for making data list structure not rely on condition filter data, and a column data is only needed in database table can just preserve various types of condition filter data.
To reach above-mentioned purpose, the present invention provides following technical scheme:
On the one hand, the present invention provides a kind of access method of condition filter data, including:
Initial condition is crossed into filter data to be decomposed, the condition filter data of trident tree construction are generated;
By the condition filter data translation of the trident tree construction into the character string comprising operator and operating value, the form of the character string is operating value+operator+operating value, the operating value is variable, constant or condition filter data, the operator includes logical operator, auxiliary operation symbol and comparison operator;
The character string is stored in database.
On the other hand, the present invention also provides a kind of access device of condition filter data, including:
Resolving cell, is decomposed for initial condition to be crossed into filter data, generates the condition filter data of trident tree construction;
First translation unit, for by the condition filter data translation of the trident tree construction into the character string comprising operator and operating value, the form of the character string is operating value+operator+operating value, the operating value is variable, constant or condition filter data, the operator includes logical operator, auxiliary operation symbol and comparison operator;
Storage unit, for the character string to be stored in database.
The access method and device of the condition filter data that the present invention is provided, initial condition is crossed into filter data to be decomposed, generate the condition filter data of trident tree construction, and by the condition filter data translation of trident tree construction into a character string comprising operator and operating value, when one character string is preserved in database, can be completed using a row of database table, compared with condition filter data are saved in database by many row used in prior art, operation complexity is enormously simplify, the storage efficiency of condition filter data is improve.And the condition filter data in the present invention are stored with a character string, the storage of the condition filter data of various complexity is disclosure satisfy that.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, and can be practiced according to the content of specification, and in order to above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
Description of the drawings
By the detailed description for reading hereafter preferred embodiment, various other advantage and benefit will be clear from understanding for those of ordinary skill in the art.Accompanying drawing is only used for illustrating the purpose of preferred embodiment, and is not considered as limitation of the present invention.And in whole accompanying drawing, it is denoted by the same reference numerals identical part.In the accompanying drawings:
Fig. 1 shows the access method flow chart of the condition filter data in the embodiment of the present invention;
Fig. 2 shows the condition filter data structure schematic diagram of the trident tree construction in the embodiment of the present invention;
Fig. 3 shows the trident tree construction in the embodiment of the present invention;
Fig. 4 shows in the embodiment of the present invention and correspondence character string is read from the database, and the character string is translated as into the method flow diagram of condition filter data;
Fig. 5 shows a kind of composition frame chart of the access device of the condition filter data in the embodiment of the present invention;
Fig. 6 shows the composition frame chart of the access device of another kind of condition filter data in the embodiment of the present invention.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the exemplary embodiment of the disclosure is shown in accompanying drawing, it being understood, however, that may be realized in various forms the disclosure and should not be limited by embodiments set forth here.On the contrary, there is provided these embodiments are able to be best understood from the disclosure, and can by the scope of the present disclosure it is complete convey to those skilled in the art.
The embodiment of the present invention provides a kind of access method of condition filter data, as shown in figure 1, the method includes:
101st, initial condition is crossed into filter data to be decomposed, generates the condition filter data of trident tree construction.
It should be noted that for complicated condition filter data are made up of the splicing of simple condition in fact.Such as Fig. 2 illustrates complicated storage condition a and is more than 8 and the decomposition situation less than 20 more than 10 or b, from upper relation of plane, it can be found that the storage condition of a complexity can be by a ternary tree structure composition.And a simple storage condition can be made up of the form of " operating value+operator+operating value ".If can be not only variable (such as b), constant (such as 8, " man ") operating value;Simple condition filter data can also be included.So, complicated storage condition can also be made up of " operating value+operator+operating value ".Therefore in the embodiment of the present invention, defining a kind of as shown in Figure 3, condition filter data ternary tree is decomposed so that initial condition is crossed into filter data, generates the condition filter data of trident tree construction.Though the original condition filter data it is complicated or simple, when the embodiment of the present invention is performed, be required for crossing filter data to initial condition and decompose, generate the condition filter data of trident tree construction.
102nd, by the condition filter data translation of the trident tree construction into the character string comprising operator and operating value, the form of the character string is operating value+operator+operating value, the operating value is variable, constant or condition filter data, the operator includes logical operator, auxiliary operation symbol and comparison operator.
Wherein, in order to by the condition filter data translation of trident tree construction into the character string that can be stored in database, the operator of crossing filter data for expression condition defined in this embodiment of the present invention, the operator can be but be not limited to logical operator, auxiliary operation symbol and comparison operator.Wherein, logical operator can be but be not limited to:| | (or), (and) etc., auxiliary operation symbol can be but be not limited to:Bracket (), comparing operation can be but be not limited to:It is more than>, it is less than<Deng.
When by the condition filter data translation of the trident tree construction into the character string comprising operator and operating value, the form of the character string of composition is operating value+operator+operating value, as previously described, the operating value can be variable, it can also be constant, can also be condition filter data, specific embodiment of the present invention contrast is not limited.When by the condition filter data translation of the trident tree construction into the character string comprising operator and operating value, can adopt but be not limited to following method and realize that the method includes:
From the beginning of the root node of the trident tree construction, based on the operator and according to the order of operating value+operator+operating value, the condition filter data in the trident tree construction are spliced, generated the character string comprising operator and operating value.For example, the character string that condition filter data " a is more than 10 or b more than 8 and less than 20 " are construed to can be such " (a>10)||((b>8)&&(b<20))”.
103rd, the character string is stored in database.
Because the condition filter data translated into are a character string, when it is stored in database, it is possible to use the column data in tables of data is stored.Specifically used that row are stored, and the embodiment of the present invention is not limited to this.
In the embodiment of the present invention, initial condition is crossed into filter data to be decomposed, generate the condition filter data of trident tree construction, and by the condition filter data translation of trident tree construction into a character string comprising operator and operating value, when one character string is preserved in database, can be completed using a row of database table, compared with condition filter data are saved in database by many row used in prior art, operation complexity is enormously simplify, the storage efficiency of condition filter data is improve.And the condition filter data in the present invention are stored with a character string, the storage of the condition filter data of various complexity is disclosure satisfy that.
Further, after original condition filter data being converted into a character string is stored in database, when using the condition filter data, need to read correspondence character string from the database, and the character string is translated as into condition filter data., the embodiment of the present invention also provides one kind and reads correspondence character string from the database, and the method that the character string is translated as into condition filter data, the method as shown in figure 4, including:
201st, correspondence character string is read from the database.
The form of data character string is filtered according to storage condition in keyword query database, correspondence character string is obtained.
202nd, the character string is translated as into initial condition and crosses filter data.
Wherein, the character string being translated as into condition filter data can adopt but be not limited to following method realization, and the method comprises the steps:
1st, the character string is identified, and the character string is split as the priority according to operator the condition filter data of operating value+operator+operating value form.
Wherein, it is the anti-condition filter data for being construed to trident data tree structure of character string are relevant with the priority of operator, therefore the priority of operator was first set according to demand before the embodiment of the present invention is performed.The setting of the priority, can be arranged according to the demand being embodied as, and the embodiment of the present invention is not limited to this.For example, operator priority is set in bracket in the embodiment of the present invention less than the priority outside bracket, | | priority be more than &&.
For example, to character string " (a>10)||((b>8)&&(b<20)) " it is identified, and the priority according to operator is specially the condition filter data that the character string is split as operating value+operator+operating value form:
Character string " (a>10)||((b>8)&&(b<20) in) " | | for operator, it is split as two operating value " a>10 " and " (b>8)&&(b<20)”;Wherein, operating value a>10 and (b>8)&&(b<20) it is condition filter data, needs according to the priority of operator again to character string a>10 and (b>8)&&(b<20) further split.Wherein, for character string " a>10 ", operator for ">", operating value is " a " and " 10 ";For character string " (b>8)&&(b<20) ", “ && " be operator, " b>8 " and " b<20 " it is operating value.
Wherein, the operating value " b after fractionation>8 " and " b<20 " it is so condition filter data to allow, then need further to character string " b>8 " and " b<20 " split.Specifically it is directed to character string b>8, b, 8 is operating value,>For operator;For character string b<20, b, 20 is operating value,<For operator.
2nd, based on the operator by the condition filter data of the condition filter data genaration trident tree construction of the operating value+operator+operating value form;
Wherein, based on operator by the condition filter data of the condition filter data genaration trident tree construction of the operating value+operator+operating value form of above-mentioned fractionation.Or as a example by above, the condition filter data of the trident tree construction of generation are as shown in Figure 2.
3rd, the condition filter data of the trident tree construction are polymerized, obtain the initial condition and cross filter data.
Or as a example by above, character string " (a>10)||((b>8)&&(b<20) it is that a is more than 8 more than 10 or b and less than 20) to return the condition filter data after explaining.
In the embodiment of the present invention, when using the condition filter data, can be translated the condition filter data of the string format taken out from database are counter, be transcribed into original condition filter data, convenient use.
Based on said method embodiment, the embodiment of the present invention provides a kind of access device of condition filter data, as shown in figure 5, including:
Resolving cell 31, is decomposed for initial condition to be crossed into filter data, generates the condition filter data of trident tree construction.
First translation unit 32, for by the condition filter data translation of the trident tree construction into the character string comprising operator and operating value, the form of the character string is operating value+operator+operating value, the operating value is variable, constant or condition filter data, the operator includes logical operator, auxiliary operation symbol and comparison operator;Wherein, first translation unit 32 by the condition filter data translation of the trident tree construction into the character string comprising operator and operating value specifically for:From the beginning of the root node of the trident tree construction, based on the operator and according to the order of operating value+operator+operating value, the condition filter data in the trident tree construction are spliced, generated the character string comprising operator and operating value.
Storage unit 33, for the character string to be stored in database.Wherein, because the condition filter data translated into are a character string, when it is stored in database, it is possible to use the column data in tables of data is stored.Specifically used that row are stored, and the embodiment of the present invention is not limited to this.
Further, after original condition filter data being converted into a character string is stored in database, when using the condition filter data, as shown in fig. 6, the device also includes:
Second translation unit 34, for when needing to use the condition filter data, correspondence character string being read from the database, and the character string being translated as into initial condition and cross filter data.Wherein, second translation unit 34 includes:
Module 341 is split, for being identified to the character string, and the character string is split as the priority according to operator the condition filter data of operating value+operator+operating value form.
Generation module 342, for being based on the operator by the condition filter data of the condition filter data genaration trident tree construction of the operating value+operator+operating value form.
Acquisition module 343, for the condition filter data of the trident tree construction to be polymerized, obtains the initial condition and crosses filter data.
Further, the device also includes:
Setting unit, for being identified to the character string, and the priority according to operator is split as the character string before the condition filter data of operating value+operator+operating value form, arranges the priority of the operator.The setting of the priority, can be arranged according to the demand being embodied as, and the embodiment of the present invention is not limited to this.For example, operator priority is set in bracket in the embodiment of the present invention less than the priority outside bracket, | | priority be more than &&.
It should be noted that the associated description of each functional unit being related in the embodiment of the present invention and module, may be referred to the correspondence description in embodiment of the method, the embodiment of the present invention will not be described in great detail herein,
In the embodiment of the present invention, initial condition is crossed into filter data to be decomposed, generate the condition filter data of trident tree construction, and by the condition filter data translation of trident tree construction into a character string comprising operator and operating value, when one character string is preserved in database, can be completed using a row of database table, compared with condition filter data are saved in database by many row used in prior art, operation complexity is enormously simplify, the storage efficiency of condition filter data is improve.And the condition filter data in the present invention are stored with a character string, the storage of the condition filter data of various complexity is disclosure satisfy that.
And in the embodiment of the present invention, when using the condition filter data, can be translated the condition filter data of the string format taken out from database are counter, be transcribed into original condition filter data, convenient use.
The access device of the condition filter data includes processor and memory, above-mentioned resolving cell, the first translation unit, storage unit, the second translation unit and setting unit etc. are stored in memory as program unit, and by computing device storage said procedure unit in memory corresponding function is realized.
Kernel is included in processor, is gone in memory to transfer corresponding program unit by kernel.Kernel can arrange one or more, make data list structure not rely on the complexity of condition filter data by adjusting kernel parameter, and a column data is only needed in database table can just preserve various types of condition filter data.
Memory potentially includes the volatile memory in computer-readable medium, the form such as random access memory (RAM) and/or Nonvolatile memory, such as read-only storage (ROM) or flash memory (flashRAM), memory includes at least one storage chip.
Present invention also provides a kind of computer program, when performing on data processing equipment, it is adapted for carrying out initializing the program code of there are as below methods step:Initial condition is crossed into filter data to be decomposed, the condition filter data of trident tree construction are generated;By the condition filter data translation of the trident tree construction into the character string comprising operator and operating value, the form of the character string is operating value+operator+operating value, the operating value is variable, constant or condition filter data, the operator includes logical operator, auxiliary operation symbol and comparison operator;The character string is stored in database.
Those skilled in the art are it should be appreciated that embodiments herein can be provided as method, system or computer program.Therefore, the application can using complete hardware embodiment, complete software embodiment or with reference to software and hardware in terms of embodiment in the form of.And, in the form of the computer program that the application can be implemented in the computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) for wherein include computer usable program code at one or more.
The application is that reference is described according to the flow chart and/or block diagram of the method, equipment (system) and computer program of the embodiment of the present application.It should be understood that the combination of flow process that can be by each flow process in computer program instructions flowchart and/or block diagram and/or square frame and flow chart and/or in block diagram and/or square frame.These computer program instructions can be provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices to produce a machine so that the device of the function for realizing being specified in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames is produced by the instruction of the computing device of computer or other programmable data processing devices.
These computer program instructions may be alternatively stored in can be guided in the computer-readable memory that computer or other programmable data processing devices work in a specific way, so that the instruction being stored in the computer-readable memory produces the manufacture for including command device, the command device realizes the function of specifying in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing devices, so that series of operation steps is performed on computer or other programmable devices to produce computer implemented process, the step of offer for realizing the function of specifying in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames so as to the instruction performed on computer or other programmable devices.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, network interface and internal memory.
Memory potentially includes the volatile memory in computer-readable medium, the such as form such as random access memory (RAM) and/or Nonvolatile memory, read-only storage (ROM) or flash memory (flashRAM).Memory is the example of computer-readable medium.
Computer-readable medium includes that permanent and non-permanent, removable and non-removable media can realize information Store by any method or technique.Information can be computer-readable instruction, data structure, the module of program or other data.The example of the storage medium of computer includes, but it is not limited to phase transition internal memory (PRAM), static RAM (SRAM), dynamic random access memory (DRAM), other kinds of random access memory (RAM), read-only storage (ROM), Electrically Erasable Read Only Memory (EEPROM), fast flash memory bank or other memory techniques, read-only optical disc read-only storage (CD-ROM), digital versatile disc (DVD) or other optical storages, magnetic cassette tape, tape magnetic rigid disk is stored or other magnetic storage apparatus or any other non-transmission medium, can be used to store the information that can be accessed by a computing device.Define according to herein, computer-readable medium does not include temporary computer readable media (transitory media), the such as data-signal and carrier wave of modulation.
Embodiments herein is these are only, the application is not limited to.To those skilled in the art, the application can have various modifications and variations.All any modification, equivalent substitution and improvements made within spirit herein and principle etc., within the scope of should be included in claims hereof.

Claims (10)

1. a kind of access method of condition filter data, it is characterised in that include:
Initial condition is crossed into filter data to be decomposed, the condition filter data of trident tree construction are generated;
By the condition filter data translation of the trident tree construction into the character comprising operator and operating value String, the form of the character string is operating value+operator+operating value, and the operating value is variable, often Amount or condition filter data, the operator includes logical operator, and auxiliary operation is accorded with and compared Operator;
The character string is stored in database.
2. method according to claim 1, it is characterised in that by the bar of the trident tree construction Part filters data translation to be included into the character string comprising operator and operating value:
From the beginning of the root node of the trident tree construction, based on the operator and according to operating value+operation The order of symbol+operating value, the condition filter data in the trident tree construction are spliced, and generate bag Character string containing operator and operating value.
3. method according to claim 1 and 2, it is characterised in that also include:
When needing to use the condition filter data, correspondence character string is read from the database, And the character string is translated as into initial condition crosses filter data.
4. method according to claim 3, it is characterised in that the character string is translated as into original Beginning condition filter data include:
The character string is identified, and the priority according to operator is split as the character string The condition filter data of operating value+operator+operating value form;
The condition filter data of the operating value+operator+operating value form are given birth to based on the operator Into the condition filter data of trident tree construction;
The condition filter data of the trident tree construction are polymerized, the initial condition are obtained and is filtered Data.
5. method according to claim 4, it is characterised in that the character string is being known Not, the character string is split as operating value+operator+operating value lattice by the priority and according to operator Before the condition filter data of formula, also include:
The priority of the operator is set.
6. a kind of access device of condition filter data, it is characterised in that include:
Resolving cell, is decomposed for initial condition to be crossed into filter data, generates the bar of trident tree construction Part crosses filter data;
First translation unit, for by the condition filter data translation of the trident tree construction into comprising behaviour Make the character string of symbol and operating value, the form of the character string is operating value+operator+operating value, institute It is variable, constant or condition filter data to state operating value, and the operator includes logical operator, Auxiliary operation symbol and comparison operator;
Storage unit, for the character string to be stored in database.
7. device according to claim 6, it is characterised in that first translation unit is used for:
From the beginning of the root node of the trident tree construction, based on the operator and according to operating value+operation The order of symbol+operating value, the condition filter data in the trident tree construction are spliced, and generate bag Character string containing operator and operating value.
8. the device according to claim 6 or 7, it is characterised in that also include:
Second translation unit, for when needing to use the condition filter data, from the database It is middle to read correspondence character string, and the character string is translated as into initial condition crosses filter data.
9. device according to claim 8, it is characterised in that second translation unit includes:
Split module, for being identified to the character string, and according to operator priority by institute State the condition filter data that character string is split as operating value+operator+operating value form;
Generation module, for being based on the operator by the operating value+operator+operating value form The condition filter data of condition filter data genaration trident tree construction;
Acquisition module, for the condition filter data of the trident tree construction to be polymerized, obtains institute State initial condition and cross filter data.
10. device according to claim 9, it is characterised in that also include:
Setting unit, for being identified to the character string, and the priority according to operator will The character string is split as before the condition filter data of operating value+operator+operating value form, is arranged The priority of the operator.
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Application publication date: 20170510