CN102789475B - The method of data synchronization of result set cache at server end of database and device - Google Patents
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Abstract
Embodiments provide a kind of method of data synchronization and device of result set cache at server end of database.Described method is when the tables of data of Update Table storehouse server end, record the line item mark of the tables of data be modified, and in the result set header fields of result set cache, store the table mark of this tables of data, when a certain query statement in described result set cache is performed, and this query statement is when being simple statement, the recorded all line items be modified re-executes and inquires about and obtain Query Result; The result of buffer memory in obtained Query Result and described result set cache merges by the different operating according to Update Table table.Implement just can effectively ensure the consistance of data by said method, make result set also can continue use when correlation table is modified, thus update time of result set when substantially reducing amendment table, and then improve Consumer's Experience.
Description
Technical field
The present invention relates to database technical field, particularly relate to a kind of method of data synchronization and device of result set cache at server end of database.
Background technology
At present, in database actual application environment, server end is the inquiry request responding user side fast, improve Consumer's Experience, create result set cache technology, one piece of region namely in the shared buffer memory of server end is deposited a certain bar query statement and is performed the result obtained, thus is convenient to can directly obtain when user side next time has same sentence to inquire about again and the result set of buffer memory before returning.
For example, webpage identical in web service can by the request repeated, as long as inquiry once like this, by result cache, during same queries request next time, just can directly return results, this result set cache technology effective solves the cache problem of the data that read-only and read operation occupies the majority.
But in prior art, result set cache technology also also exists data consistency requirement, namely when the tables of data of database server side is modified, all result sets relating to this table directly lost efficacy, and when having same sentence to inquire about so again, just needed to perform traditional process, then the latest result of acquisition is saved in result set cache, do not realize the incremental update of result set cache, make the update time of result set longer, reduce Consumer's Experience.
Summary of the invention
Embodiments provide a kind of method of data synchronization and device of result set cache at server end of database, effectively can ensure the consistance of data, make result set also can continue when correlation table is modified to use, thus update time of result set when substantially reducing amendment table, and then improve Consumer's Experience.
Embodiments provide a kind of method of data synchronization of result set cache at server end of database, described method comprises:
When the tables of data of Update Table storehouse server end, record the line item mark of the tables of data be modified, and in the result set header fields of result set cache, store the table mark of this tables of data, and in described result set header fields, storing the classification of query statement, the classification of described query statement comprises the simple statement of single operation and the complicated statement of multioperation;
When a certain query statement in described result set cache is performed, and when this query statement is simple statement, the recorded all line items be modified re-execute and inquires about and obtain Query Result;
The result of buffer memory in obtained Query Result and described result set cache merges by the different operating according to Update Table table, synchronized update result set cache.
The embodiment of the present invention additionally provides a kind of data synchronization unit of result set cache at server end of database, and described device comprises:
Amendment record unit, for when the tables of data of Update Table storehouse server end, records the line item mark of the tables of data be modified;
Header fields setting unit, for storing the table mark of institute's Update Table table in the result set header fields of result set cache, and in described result set header fields, storing the classification of query statement, the classification of described query statement comprises the simple statement of single operation and the complicated statement of multioperation;
Record queries unit, for being performed when a certain query statement in described result set cache, and when this query statement is simple statement, the recorded all line items be modified re-executes and inquires about and obtain Query Result;
Synchronized update unit, merges for the result of buffer memory in the Query Result that obtained by record queries unit according to the different operating of Update Table table and described result set cache, synchronized update result set cache.
As can be seen from above-mentioned provided technical scheme, described method, when the tables of data of Update Table storehouse server end, records the line item mark of the tables of data be modified, and in the result set header fields of result set cache, store the table mark of this tables of data; When a certain query statement in described result set cache is performed, and when this query statement is simple statement, the recorded all line items be modified re-execute and inquires about and obtain Query Result; The result of buffer memory in obtained Query Result and described result set cache merges by the different operating according to Update Table table, synchronized update result set cache.Implement just can effectively ensure the consistance of data by said method, make result set also can continue use when correlation table is modified, thus update time of result set when substantially reducing amendment table, and then improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 provides by the embodiment of the present invention method of data synchronization schematic flow sheet of result set cache at server end of database;
Fig. 2 lifts by the present invention the structural representation of result set cache in instantiation;
Fig. 3 provides by the embodiment of the present invention structural representation of data synchronization unit.
Embodiment
Embodiment of the present invention provides a kind of method of data synchronization and device of result set cache at server end of database, the method shows the unique identification of interior each row of data by the oid(of the line item be modified during record modification tables of data, row data can be found) by this mark, after tables of data amendment, if query statement exists in result set cache, then again inquire about on the recorded line item be modified, avoid the inquiry of full table, and after obtaining result, its result set with buffer memory is before merged, thus when avoiding amendment table, corresponding result set is directly cancelled, reach the effect of incremental update buffer memory, the method effectively ensures the consistance of data, make result set also can continue when correlation table is modified to use, thus update time of result set when substantially reducing amendment table, and then improve Consumer's Experience.
For better describing embodiment of the present invention, now by reference to the accompanying drawings the specific embodiment of the present invention is described, be illustrated in figure 1 the embodiment of the present invention the method for data synchronization schematic flow sheet of result set cache at server end of database is provided, described method comprises:
Step 11: when the tables of data of Update Table storehouse server end, records the line item mark of the tables of data be modified, and in the result set header fields of result set cache, store the table mark of this tables of data.
In this step, when the tables of data of Update Table storehouse server end, by arranging record sheet to record the line item mark of the tables of data be modified in described result set cache, and the table of this tables of data mark can be stored in the result set header fields of result set cache.
Step 12: when a certain query statement in described result set cache is performed, judges whether this query statement is simple statement.
In this step, when a certain query statement in result set cache is performed, the classification of this query statement is judged, in specific implementation, can also store the classification of query statement in result set header fields, the classification of described query statement comprises the simple statement of single operation and the complicated statement of multioperation.
Specifically, by judging the operating process of this query statement, if the statement of single operation, be then judged as simple statement, and can be simple statement by the query statement category setting stored in result set header fields further; If the statement of multioperation mixing, be then judged as complicated statement, and can be complicated statement by the query statement category setting stored in result set header fields further.
In addition, all right setting data consistance zone bit in result set header fields, when a certain query statement in described result set cache is performed, can also judge whether to need to carry out successor operation according to the data consistency zone bit arranged in described result set header fields further, if described data consistency zone bit is consistent, then do not need the operation carrying out subsequent step, if described data consistency zone bit is inconsistent, then continue subsequent step operation.
Step 13: if judging is simple statement, then re-executes on the recorded all line items be modified and inquire about and obtain Query Result.
In this step, the recorded all line items be modified re-execute and to inquire about and the process obtaining Query Result is specially: all line items marks obtaining this tables of data according to the table identifier lookup of stored tables of data, and be identified at according to this all line item all line items of being modified re-execute and inquire about and obtain Query Result.
Step 14: the result of buffer memory in obtained Query Result and described result set cache merges by the different operating according to Update Table table, synchronized update result set cache.
In this step, the different operating of Update Table table comprises inserting line record, and amendment line item or Delete Row record, merge the result of buffer memory in obtained Query Result and described result set cache for different situations, specifically:
If described Update Table table be operating as inserting line record, then the result of buffer memory in Query Result and described result set cache is merged;
If described Update Table table be operating as amendment line item, then the result of buffer memory in Query Result and described result set cache is merged, and former line item is deleted;
If described Update Table table be operating as Delete Row record, then in described result set cache, delete this line item.
Synchronized update result set cache is just achieved by above-mentioned operation, and update time of result set when shortening amendment table, improve Consumer's Experience.
In addition, when carrying out the operation of above-mentioned steps 12, judge that this query statement is not simple statement, when being also complicated statement, then carry out the operation of step 15, the i.e. cache invalidation of this complicated statement, is again inquired about by the tables of data of described database server side and is obtained Query Result, and upgrading result set cache.In specific implementation, by query statement is classified, for the complicated statement comprising the multioperations such as sortby, groupby, limit, aggregate function, when revising table and occurring, directly its result set is cancelled, the situation about losing more than gain that factor data synchronously causes can be avoided, thus ensure the validity of data synchronization strategy.
In addition, also can comprise further in the result set head of described result set cache: for the field of uniquely tagged result set cache, and for recording the field of the accessed number of times of result set cache, so that more effective, result set cache be managed.
With concrete example, above-mentioned method of data synchronization is described in detail below, be illustrated in figure 2 the present invention lift the structural representation of result set cache in instantiation, in Fig. 2, result set cache comprises: index, result set, record sheet three part, this example relates generally to result set and record sheet, and result set is divided into head and result data two parts.
In Fig. 2, result set head comprises five fields altogether: field 1 deposits query statement for this result set of uniquely tagged; Field 2 deposits the table mark of institute's Update Table table, shows which table result set comes from; Field 3 store data consistance zone bit, for represent this result set whether with the data consistent of tables of data; Field 4 deposits the accessed number of times of this result set, for cache management strategy; Field 5 deposits the classification of query statement, and comprise the complicated statement of the single simple statement of operation and multioperation, this classification can represent simple statement with 1, and 2 represent complicated statement.
When what in Fig. 2, record sheet was deposited is the tables of data of Update Table storehouse server end, the mark oid of the line item be modified, here time the tables of data be only modified identifies inside the field 2 of present result set head, just record the oid of the line item that it is modified in this record sheet, the oid being not limited to line item that in specific implementation, record sheet is deposited, other can the mark of unique designation line item also be fine.
By aforesaid operations, when tables of data is modified, is recorded to record sheet by being modified capable oid, and revises the respective field of result set head, and perform following operation when next identical query statement performs:
Step1: first read result set head, if field 3 consistance zone bit is true, then directly returns results collection to user, does not carry out successor operation; If field 3 is fale, then carry out successor operation.
The query statement classification of further judgement field 5, if query statement is classification 1 simple statement, then enters Step2; If query statement is the complicated statement of classification 2, then illustrate that result set lost efficacy, and was again inquired about by the tables of data of described database server side and was obtained Query Result, and upgrading result set cache.
Step2: the oid being modified line item recorded in record sheet according to the tables of data identifier lookup in field 2;
Step3: query statement is re-executed to all line items be modified, obtains Query Result;
Step4: is merged by the Query Result of obtained Query Result with result set cache before, renewal result set also arranges respective field, and latest result is returned to user.
Here, described merging process is specially: for the line item be inserted into, and meets querying condition and then merges with the Query Result of buffer memory; For the line item be modified, meet querying condition and then merge with the Query Result of buffer memory, be recorded in if old in buffered results to exist and deleted; For deleted line item, deleted if exist in buffered results.
Above-mentioned simple statement can be the statement of the single operation not comprising the statements such as classification sort by, grouping group by, aggregate function, restriction limit in this example.Above-mentioned complicated statement can be the statement of the multioperation comprising the statement such as sort by, group by, aggregate function, restriction limit in this example, and this complicated statement is not suitable for carrying out data syn-chronization, because operation is comparatively complicated, consuming time more.
By the enforcement of technique scheme, just effectively can ensure the consistance of data, make result set also can continue when correlation table is modified to use, thus update time of result set when substantially reducing amendment table, and then improve Consumer's Experience.
Embodiments provide a kind of data synchronization unit of result set cache at server end of database, be illustrated in figure 3 the embodiment of the present invention the structural representation of data synchronization unit is provided, described device comprises:
Amendment record unit 31, for when the tables of data of Update Table storehouse server end, records the line item mark of the tables of data be modified;
Header fields setting unit 32, for storing the table mark of institute's Update Table table in the result set header fields of result set cache, and in described result set header fields, storing the classification of query statement, the classification of described query statement comprises the simple statement of single operation and the complicated statement of multioperation;
Record queries unit 33, for being performed when a certain query statement in described result set cache, judge that whether this query statement is the simple statement of single operation, if simple statement, then re-execute on the recorded all line items be modified and inquire about and obtain Query Result;
Synchronized update unit 34, merges for the result of buffer memory in the Query Result that obtained by record queries unit according to the different operating of Update Table table and described result set cache, synchronized update result set cache.
In specific implementation, above-mentioned header fields setting unit 32 is also for setting data consistance zone bit in described result set header fields, judge whether to need to carry out successor operation according to this data consistency zone bit, if described data consistency zone bit is consistent, then do not need to carry out successor operation, if described data consistency zone bit is inconsistent, then continue successor operation.
Described header fields setting unit 32 is also used for the field of uniquely tagged result set cache for setting in described result set header fields, and for recording the field of the accessed number of times of result set cache.
In said apparatus embodiment, the specific implementation process of each unit can with reference to described in said method embodiment.
It should be noted that in said apparatus embodiment, included unit is carry out dividing according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit, also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
In addition, one of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, corresponding program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
In sum, the embodiment of the present invention effectively can ensure the consistance of data, makes result set also can continue when correlation table is modified to use, thus update time of result set when substantially reducing amendment table, and then improve Consumer's Experience.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (6)
1. a method of data synchronization for result set cache at server end of database, is characterized in that, described method comprises:
When the tables of data of Update Table storehouse server end, record the line item mark of the tables of data be modified, and in the result set header fields of result set cache, store the table mark of institute's Update Table table, and in described result set header fields, storing the classification of query statement, the classification of described query statement comprises the simple statement of single operation and the complicated statement of multioperation;
When a certain query statement in described result set cache is performed, judge that whether this query statement is the simple statement of single operation, if simple statement, then re-execute on the recorded all line items be modified and inquire about and obtain Query Result, specifically comprise: all line items mark obtaining this tables of data according to the table identifier lookup of stored tables of data, and be identified at according to this all line item all line items of being modified re-execute and inquire about and obtain Query Result;
The result of buffer memory in obtained Query Result and described result set cache merges by the different operating according to Update Table table, synchronized update result set cache;
If judge, this query statement is the complicated statement of multioperation, the then cache invalidation of this complicated statement, is again inquired about by the tables of data of described database server side and is obtained Query Result, and upgrading result set cache;
When a certain query statement in described result set cache is performed, described method also comprises:
Judge whether to need to carry out successor operation according to the data consistency zone bit arranged in described result set header fields, if described data consistency zone bit is consistent, then do not need to carry out successor operation, if described data consistency zone bit is inconsistent, then continue successor operation.
2. method of data synchronization as claimed in claim 1, is characterized in that, the line item mark of the tables of data that described record is modified, specifically comprises:
By arranging record sheet to record the line item mark of the tables of data be modified in described result set cache.
3. method of data synchronization as claimed in claim 1, is characterized in that, also comprise in the result set head of described result set cache:
For the field of uniquely tagged result set cache, and for recording the field of the accessed number of times of result set cache.
4. method of data synchronization as claimed in claim 1, it is characterized in that, the result of buffer memory in obtained Query Result and described result set cache merges by the described different operating according to Update Table table, specifically comprises:
If described Update Table table be operating as inserting line record, then the result of buffer memory in Query Result and described result set cache is merged;
If described Update Table table be operating as amendment line item, then the result of buffer memory in Query Result and described result set cache is merged, and former line item is deleted;
If described Update Table table be operating as Delete Row record, then in described result set cache, delete this line item.
5. a data synchronization unit for result set cache at server end of database, is characterized in that, described device comprises:
Amendment record unit, for when the tables of data of Update Table storehouse server end, records the line item mark of the tables of data be modified;
Header fields setting unit, for storing the table mark of institute's Update Table table in the result set header fields of result set cache, and in described result set header fields, storing the classification of query statement, the classification of described query statement comprises the simple statement of single operation and the complicated statement of multioperation;
Record queries unit, for being performed when a certain query statement in described result set cache, judge that whether this query statement is the simple statement of single operation, if simple statement, then re-execute on the recorded all line items be modified and inquire about and obtain Query Result, specifically comprise: all line items mark obtaining this tables of data according to the table identifier lookup of stored tables of data, and be identified at according to this all line item all line items of being modified re-execute and inquire about and obtain Query Result; If judge, this query statement is the complicated statement of multioperation, the then cache invalidation of this complicated statement, is again inquired about by the tables of data of described database server side and is obtained Query Result, and upgrading result set cache;
Synchronized update unit, merges for the result of buffer memory in the Query Result that obtained by record queries unit according to the different operating of Update Table table and described result set cache, synchronized update result set cache;
Described header fields setting unit is also for setting data consistance zone bit in described result set header fields, judge whether to need to carry out successor operation according to this data consistency zone bit, if described data consistency zone bit is consistent, then do not need to carry out successor operation, if described data consistency zone bit is inconsistent, then continue successor operation.
6. data synchronization unit as claimed in claim 5, is characterized in that,
Described header fields setting unit is also used for the field of uniquely tagged result set cache for setting in described result set header fields, and for recording the field of the accessed number of times of result set cache.
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9031918B2 (en) * | 2012-12-27 | 2015-05-12 | Microsoft Licensing Technology, LLC | Per-user aggregation of database content |
| CN104123288B (en) * | 2013-04-24 | 2018-06-01 | 阿里巴巴集团控股有限公司 | A kind of data query method and device |
| CN103324679B (en) * | 2013-05-28 | 2017-03-08 | 杭州朗和科技有限公司 | Control method and equipment that in a kind of caching server, data update |
| CN103377292B (en) * | 2013-07-02 | 2017-02-15 | 华为技术有限公司 | Database result set caching method and device |
| CN103605776B (en) * | 2013-11-28 | 2017-04-12 | 北京国双科技有限公司 | Method and device for processing data of information database |
| US10885036B2 (en) * | 2015-02-03 | 2021-01-05 | Red Hat, Inc. | Obtaining incremental updates from a database using a partial query |
| CN106156070B (en) * | 2015-03-31 | 2019-07-12 | 华为技术有限公司 | A kind of querying method, file mergences method and relevant apparatus |
| CN108089915B (en) * | 2016-11-22 | 2021-10-15 | 北京京东尚科信息技术有限公司 | Method and system for business control processing based on message queue |
| CN114677145A (en) * | 2016-12-09 | 2022-06-28 | 创新先进技术有限公司 | Client system, information processing method, reading and writing method and device |
| CN109086279B (en) * | 2017-06-13 | 2021-10-15 | 北京京东尚科信息技术有限公司 | Report caching method and device |
| CN109947780A (en) * | 2017-08-17 | 2019-06-28 | 天津数观科技有限公司 | Method, device and system for updating cache by using agent program |
| CN108459930B (en) * | 2018-04-02 | 2020-09-11 | 深圳臻迪信息技术有限公司 | Data backup method, device and storage medium |
| CN117527833B (en) * | 2024-01-04 | 2024-03-29 | 深圳市度申科技有限公司 | Data synchronization method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551801A (en) * | 2008-03-31 | 2009-10-07 | 国际商业机器公司 | Data synchronization method and data synchronization system |
| CN101789991A (en) * | 2009-12-30 | 2010-07-28 | 中兴通讯股份有限公司 | Method, device and mobile terminal for acquiring data change information |
| CN102279880A (en) * | 2011-07-28 | 2011-12-14 | 深圳市五巨科技有限公司 | Method and system for updating cache in real time |
-
2012
- 2012-05-08 CN CN201210140173.4A patent/CN102789475B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551801A (en) * | 2008-03-31 | 2009-10-07 | 国际商业机器公司 | Data synchronization method and data synchronization system |
| CN101789991A (en) * | 2009-12-30 | 2010-07-28 | 中兴通讯股份有限公司 | Method, device and mobile terminal for acquiring data change information |
| CN102279880A (en) * | 2011-07-28 | 2011-12-14 | 深圳市五巨科技有限公司 | Method and system for updating cache in real time |
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Effective date of registration: 20211224 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: xFusion Digital Technologies Co., Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |