EP1002287A1 - Method for upgrading a database - Google Patents
Method for upgrading a databaseInfo
- Publication number
- EP1002287A1 EP1002287A1 EP98946302A EP98946302A EP1002287A1 EP 1002287 A1 EP1002287 A1 EP 1002287A1 EP 98946302 A EP98946302 A EP 98946302A EP 98946302 A EP98946302 A EP 98946302A EP 1002287 A1 EP1002287 A1 EP 1002287A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- database
- upgr
- component
- stored procedure
- new
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1433—Saving, restoring, recovering or retrying at system level during software upgrading
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/28—Databases characterised by their database models, e.g. relational or object models
- G06F16/284—Relational databases
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/80—Database-specific techniques
Definitions
- the invention relates to a method for upgrading databases including a change of the database format.
- Relational databases are used to handle the storage and retrieval of data for different applications and enviroments.
- Databases of this kind run on computer systems.
- new functionality shall be added to a database, i.e when the database is upgraded, the format in which the data is stored very often has to be changed as well.
- access to the database must be denied to avoid inconsistency. In other words, it is not allowed to add or change (update) data while the change of the database functionality and format takes place.
- the database is not accessible during certain phases of an upgrade which phases should be minimized.
- a conventional solution to the above mentioned problem is to use an additional system during the upgrade.
- the additional system is a fully operable system with all the functionality of the orginial system.
- Extra hardware and software is required to log all data changes during the upgrade of the database.
- the database is copied to the additional system, and a logging mechanism is initiated , for example, in the original system.
- the upgrade of the database is then performed in the additional system while the original system continues to operate as before but also logs all data changes during the upgrade.
- all logged data changes are applied to the upgraded database in the addtional system. If the upgrade fails, the addtional system is simply disconnected and the original system continues with its normal operation, however, without additionally logging data changes any longer.
- the problem to be solved by the invention is to provide a method for upgrading a database including a change of the database format which method avoids extra hardware and software, limits the interuption of the database operation to a minimum, and allows a save return to the original state of the database in case of a failure during the upgrade.
- a method for upgrading a database using a table for storing data and a stored procedure for processing data stored in said table of said database said database running on a computer system, comprising the steps of: creating new a table in said database; copying and/or transforming data from said table to said new table; adding a new version of said stored procedure to said database; and adding an additional stored procedure to the database which refers to both the previous version and the new version of the stored procedure whenever data is to be processed with the stored procedure, for causing data processing to take place in accordance with the previous version and the new version of the stored procedure.
- a systemtable For creating a link to said additional stored procedure a systemtable can be used.
- the systemtable can be a table of the database.
- a configuration file can be used for creating a link to said additional stored procedure.
- the configuration file can be stored on a storage medium of the computer system.
- the above problem is further solved by a method for upgrading a database by replacing an old version with a new version of a component of the database providing database functionality, said database running on a computer system wherein during the upgrade the old version and the new version of the database component providing database functionality are used at least temporarily in parallel and wherein reference to both versions is made through an additional component of the database providing a link to both versions of the database component.
- the link can be provided by means of a systemtable referring an access to said component of the database to said additional component.
- the systemtable can be a table of the database.
- the link can be provided by means of a configuration file referring an access to said component of the database to said additional component.
- the configuration file is advantageously stored on a storage medium of said computer system.
- the components of the database are stored procedures, trigger, indexes or tables.
- the new version of the table may have a format different from the format of the old version of the table.
- Figure 1 shows a digramm of a computer system hosting a database and workstations accessing the database.
- Figure 2a shows a diagramm illustrating an upgrade of a database on table level according to the invention.
- Figure 2b shows a diagramm illustrating an upgrade of a database on page level according to the invention.
- Figure 3 shows a diagramm of a computer system using a systemtable for upgrading a database according to the invention.
- Figure 4 shows a diagramm of a computer system using a configuration file for upgrading a database according to the invention.
- Figure 1 shows a computer system 1 hosting a database 2 on an appropriate storage medium, for example a hard disk or a group of hard disks. Users access the information or data stored in the database, for example, from a terminal or from their workstations 3a, 3b, ... which are connected to the computer system 1 either directly or via a local or wide area network (LAN or WAN) .
- the database 2 comprises tables, stored procedures, triggers, indexes etc. all of which provide certain database functions, respectively.
- changes will made to all or some of the components providing database functionality.
- new and/or additional functions are provided by means of new and/or additional stored procedures, triggers and so on. This sometimes also requires that changes are made to the format of the tables of the database.
- new tables are created to receive the data stored in the old tables, which are the tables used by the database until the upgrade of the database. Data are copied and/or transformed into the new tables during which process the data are adapted to the new format of the tables if required. To avoid downtime, i.e. periods during which the users cannot access the database, the process of copying and/or transforming data from the old tables to the new tables needs special consideration.
- data sets of a predetermined granularity are defined within the tables which data sets are handled jointly during the upgrade process to reduced the time periods during which the system is not accessible.
- FIG. 2a if an upgrade is based on table level (granularity I) , the whole table to be upgraded is modified in one operation. This approach should be choosen where the modification is a fast operation, for example adding a column with a default value. While a table is upgraded, access to the table as a whole is denied to avoid inconsistency. As shown in Figure 2b, if the modification of a table is a more complicated operation that takes longer time, the table is upgraded on page level (granularity II) .
- a page can be understood to be an internal system unit of a specific size, for example 1024 Bytes, which usually comprises - completely or partly - one or more related information units such as fields or records.
- both the old and the new tables have to be synchronized as far as data changes and new entries are concerned.
- the update of data in the old and the new table is an atomic operation, i.e. access is denied to the table or the page until both tables are updated.
- an update of data is performed in the new tables only where data sets have already been copied and/or transformed from the old tables to the new tables.
- a first method for handling versions of database components will be described with special emphasis on stored procedures of the database. The skilled person will understand that this process can also be performed for other components of a database comparable to stored procedures.
- a systemtable is used during the upgrade process which systemtable holds references to all or just thoses stored procedure which are to be upgraded, i.e. replaced by stored procedure of a new version. All or just thoses stored procedure which are to be upgraded are referenced through the systemtable during the upgrade process.
- a systemtable according to the invention may look as follows:
- the entries in the systemtable refers only to one set of stored procedures, i.e. the base version.
- the system looks up the momentarily valid name or version of the stored procedure to which the specific transaction initiated by the workstation is linked. For example, if the access from a workstation requires that stored procedure sp_a is processed the system will look up the valid version of stored procedure sp_a in the systemtable.
- the valid version of stored procedure sp_a is sp_a_l .0 which is then used by the system to perform the transaction requested by the workstation.
- new versions of all or some stored procedures are to be installed in the database.
- a new stored procedure is added to the database.
- the systemtable is updated with names/versions of the new stored procedures, i.e. the target versions are added.
- additional stored procedures sp_a_upgr and sp_c_upgr are added to the systemtable.
- the additional stored procedures sp_a__upgr and sp_c_upgr are used only during the upgrade process and use the new and the old stored procedures to update both the new and the old tables, resepctively, in accordance with transactions initiated by the workstations.
- the additional stored procedure sp_a_upgr iniates in the database two branches of processing on the basis of base version sp_a__l .0 and new version sp_a_l .1 whereby data is processed and updated in both the new and the old tables of the database system.
- stored procedure sp_b there exists no additional stored procedure since stored procedure sp_b is not upgraded, i.e. remains the same in the old and the new database.
- the system will refer to the basic version sp_b in such case and use the base version for both the old and the new tables.
- a configuration file is used during the upgrade process which file holds references to all or just thoses stored procedure which are to be upgraded, i.e. replace by stored procedure of a new version. All or just thoses stored procedure which are to be upgraded are referenced through the configuration file during the upgrade process.
- the configuration file is stored on a separate storage media 4 provided in the computer system 1 or the storage media on which the database 2 is also stored.
- a configuration file according to the invention can be a simple text file and may look as follows:
- # #ENTRIES name of stored procedure known to the system; #base version; target version; upgrade version sp_a; sp_a_l .0 ; sp_a_l .1 ; sp_a_upgr sp_b; sp_b sp_c; sp__c_l .0 ; sp_c_l .1 ; sp_c_upgr
- the entries in the configuration file refer only to one set of stored procedures, i.e. the base version.
- the system looks up the momentarily valid name or version of the stored procedure to which the specific transaction initiated by the workstation is linked. For example, if the access from a workstation requires that stored procedure sp_a is processed the system will look up the valid version of stored procedure sp_a in the configuration file.
- the valid version of stored procedure sp_a is sp_a_l .0 which is then used by the system to perform the transaction requested by the workstation.
- new versions of all or some stored procedures are to be installed in the database. It is also possible that a new stored procedure is added to the database.
- the configuration file is updated with names/versions of the new stored procedures, i.e. the target versions are added.
- additional stored procedures sp_a_upgr and sp_c_upgr are added to the configuration file. The additional stored procedures sp_a_upgr and sp_c_upgr are used only during the upgrade process and use the new and the old stored procedures to update both the new and the old tables, resepctively, in accordance with transactions initiated by the workstations.
- the additional stored procedure sp_a_upgr iniates at the workstation two branches of processing on the basis of base version sp_a_l .0 and new version sp_a_l .1 whereby data is processed and updated in both the new and the old tables of the database system.
- stored procedure sp_b there exists no additional stored procedure since stored procedure sp_b is not upgraded, i.e. remains the same in the old and the new database.
- the system will refer to the basic version sp_b in such case and use the base version for both the old and the new tables.
- the switch over from the old stored procedure to the new stored procedures is performed by updating the configuration file and reread it.
- To update and reread the configuration file is a very fast operation, so that the users of the system will only experience a small delay and no downtime .
- a third method for handling versions of database components could be a combination of a systemtable and a configuration file.
- the systemtable will refer to some stored procedures while the configuration file will refer to other stored procedures.
- the other components of the database can be handled in the same manner.
- the tables could be referenced through the systemtable or configuaration file and treated similiary as outlined above with respect of stored procedures .
Abstract
When upgrading a database the downtime of the database should be kept to a minimum as well as the hardware and software requirements. Moreover, a rollback of the upgrade should be possible at any time. The method disclosed here comprises the steps of creating a new table in said database, copying and/or transforming data from said table to said new table, adding a new version of said stored procedure to said database, and adding an additional stored procedure to the database which refers to both the previous version and the new version of the stored procedure whenever data is to be processed with the stored procedure, for causing data processing to take place in accordance with the previous version and the new version of the stored procedure.
Description
METHOD FOR UPGRADING A DATABASE
The invention relates to a method for upgrading databases including a change of the database format.
Relational databases are used to handle the storage and retrieval of data for different applications and enviroments. Databases of this kind run on computer systems. When new functionality shall be added to a database, i.e when the database is upgraded, the format in which the data is stored very often has to be changed as well. Usually, during the change access to the database must be denied to avoid inconsistency. In other words, it is not allowed to add or change (update) data while the change of the database functionality and format takes place. At least, the database is not accessible during certain phases of an upgrade which phases should be minimized.
Further, if the upgrade of the database fails it must be possible to return to the previous state of the database. Data changes that have been applied during or after the upgrade have to be taken into account as well as data changes queued to be applied.
A conventional solution to the above mentioned problem is to use an additional system during the upgrade. The additional system is a fully operable system with all the functionality of the orginial system. Extra hardware and software is required to log all data changes during the upgrade of the database. Before the upgrade, the database is copied to the additional system, and a logging mechanism is initiated , for example, in the original system. The
upgrade of the database is then performed in the additional system while the original system continues to operate as before but also logs all data changes during the upgrade. When the database upgrade is finished, all logged data changes are applied to the upgraded database in the addtional system. If the upgrade fails, the addtional system is simply disconnected and the original system continues with its normal operation, however, without additionally logging data changes any longer.
The above method for upgrading a database is disadvantageous since an additional system has to be installed and brought to the site where the database is to be upgraded. During the upgrade double software lincenses are need since on both the original and the additional system databases run in parallel for a certain time. Further, it turns out to be quite complex to manage the database upgrade due to all manual intervention necessary.
Therefore, the problem to be solved by the invention is to provide a method for upgrading a database including a change of the database format which method avoids extra hardware and software, limits the interuption of the database operation to a minimum, and allows a save return to the original state of the database in case of a failure during the upgrade.
The above problem is solved by a method for upgrading a database using a table for storing data and a stored procedure for processing data stored in said table of said database, said database running on a computer system, comprising the steps of: creating new a table in said database; copying and/or transforming data from said table to said new table; adding a new version of said stored procedure to said database; and
adding an additional stored procedure to the database which refers to both the previous version and the new version of the stored procedure whenever data is to be processed with the stored procedure, for causing data processing to take place in accordance with the previous version and the new version of the stored procedure.
For creating a link to said additional stored procedure a systemtable can be used. The systemtable can be a table of the database. As an alternative or in addition a configuration file can be used for creating a link to said additional stored procedure. The configuration file can be stored on a storage medium of the computer system.
The above problem is further solved by a method for upgrading a database by replacing an old version with a new version of a component of the database providing database functionality, said database running on a computer system wherein during the upgrade the old version and the new version of the database component providing database functionality are used at least temporarily in parallel and wherein reference to both versions is made through an additional component of the database providing a link to both versions of the database component.
The link can be provided by means of a systemtable referring an access to said component of the database to said additional component. The systemtable can be a table of the database.
In additon or as an alternative the link can be provided by means of a configuration file referring an access to said component of the database to said additional component. The configuration file is advantageously stored on a storage medium of said computer system.
The components of the database are stored procedures, trigger, indexes or tables. The new version of the table may have a format different from the format of the old version of the table.
The invention will be described in greater detail further below where reference is made to the drawings.
Figure 1 shows a digramm of a computer system hosting a database and workstations accessing the database.
Figure 2a shows a diagramm illustrating an upgrade of a database on table level according to the invention.
Figure 2b shows a diagramm illustrating an upgrade of a database on page level according to the invention.
Figure 3 shows a diagramm of a computer system using a systemtable for upgrading a database according to the invention.
Figure 4 shows a diagramm of a computer system using a configuration file for upgrading a database according to the invention.
Figure 1 shows a computer system 1 hosting a database 2 on an appropriate storage medium, for example a hard disk or a group of hard disks. Users access the information or data stored in the database, for example, from a terminal or from their workstations 3a, 3b, ... which are connected to the computer system 1 either directly or via a local or wide area network (LAN or WAN) . The database 2 comprises tables, stored procedures, triggers, indexes etc. all of which provide certain database functions, respectively.
When an upgrade of the database is required, changes will made to all or some of the components providing database functionality. Usually new and/or additional functions are provided by means of new and/or additional stored procedures, triggers and so on. This sometimes also requires that changes are made to the format of the tables of the database.
According to the invention new tables are created to receive the data stored in the old tables, which are the tables used by the database until the upgrade of the database. Data are copied and/or transformed into the new tables during which process the data are adapted to the new format of the tables if required. To avoid downtime, i.e. periods during which the users cannot access the database, the process of copying and/or transforming data from the old tables to the new tables needs special consideration. According to the invention, data sets of a predetermined granularity are defined within the tables which data sets are handled jointly during the upgrade process to reduced the time periods during which the system is not accessible.
As shown in Figure 2a, if an upgrade is based on table level (granularity I) , the whole table to be upgraded is modified in one operation. This approach should be choosen where the modification is a fast operation, for example adding a column with a default value. While a table is upgraded, access to the table as a whole is denied to avoid inconsistency. As shown in Figure 2b, if the modification of a table is a more complicated operation that takes longer time, the table is upgraded on page level (granularity II) . A page can be understood to be an internal system unit of a specific size, for example 1024 Bytes, which usually comprises - completely or partly - one or more related information units such as fields or records. By denying access to a page, one or more records of a table are locked. For upgrading on page level, a new
table is installed and data from the old table is copied and/or transformed to the new table as indicated by the operator T in Figure 2b. While the table is upgraded, access to only the page currently processed by operator T is denied to avoid inconsistency.
Moreover, both the old and the new tables have to be synchronized as far as data changes and new entries are concerned. By updating both the new and the old tables, as proposed by the invention, not only data consistency is achieved but also the option to dismiss the upgrade and continue operation of the original system. The update of data in the old and the new table is an atomic operation, i.e. access is denied to the table or the page until both tables are updated. Preferably, an update of data is performed in the new tables only where data sets have already been copied and/or transformed from the old tables to the new tables.
To perform an upgrade of tables of a database according to the invention, the remaining components providing database functionality like stored procedures, trigger, indexes, etc. have to exist in an old version as well as in a new version. To avoid any conflict while accessing a component of the database, like stored procedures, a method for handling different versions of stored procedures or the like is required. Three methods will be discussed in the following.
A first method for handling versions of database components will be described with special emphasis on stored procedures of the database. The skilled person will understand that this process can also be performed for other components of a database comparable to stored procedures.
As shown in Figure 3 a systemtable is used during the upgrade process which systemtable holds references to all or just thoses stored procedure which are to be upgraded, i.e. replaced by stored procedure of a new version. All or just thoses stored procedure which are to be upgraded are referenced through the systemtable during the upgrade process. A systemtable according to the invention may look as follows:
Table 1
name of stored base target upgrade procedure known version version version to the system
sp a sp a 1.0 sp a 1.1 sp a upgr
sp b sp_b - -
sp c sp__c_l .0 sp c 1.1 sp_c_upgr
• • • ... • • • • • •
During normal operation the entries in the systemtable refers only to one set of stored procedures, i.e. the base version. When a workstation accesses the database the system looks up the momentarily valid name or version of the stored procedure to which the specific transaction initiated by the workstation is linked. For example, if the access from a workstation requires that stored procedure sp_a is processed the system will look up the valid version of stored procedure sp_a in the systemtable. In the above table and during normal operation, the valid version of stored procedure sp_a is sp_a_l .0 which is then used by the system to perform the transaction requested by the workstation.
In case of an upgrade of the database, new versions of all or some stored procedures are to be installed in the database. It is also possible that a new stored procedure is added to the database. According to the invention, the systemtable is updated with names/versions of the new stored procedures, i.e. the target versions are added. To keep old and new tables of the database synchronized additional stored procedures sp_a_upgr and sp_c_upgr are added to the systemtable. The additional stored procedures sp_a__upgr and sp_c_upgr are used only during the upgrade process and use the new and the old stored procedures to update both the new and the old tables, resepctively, in accordance with transactions initiated by the workstations.
For example, during an upgrade the additional stored procedure sp_a_upgr iniates in the database two branches of processing on the basis of base version sp_a__l .0 and new version sp_a_l .1 whereby data is processed and updated in both the new and the old tables of the database system. With respect to stored procedure sp_b, there exists no additional stored procedure since stored procedure sp_b is not upgraded, i.e. remains the same in the old and the new database. The system will refer to the basic version sp_b in such case and use the base version for both the old and the new tables.
The switch over from the old stored procedures to the new stored procedures would be to deny access to the systemtable, update the references so that the desired stored procedures are referenced and to grant access to the systemtable. The updating of references is a very fast operation, so the users of the system will only experience a small delay and no downtime.
A second method for handling versions of database components will be described in the following. As shown in Figure 4 a configuration file is used during the upgrade process which file holds references to all or just thoses stored procedure which are to be upgraded, i.e. replace by stored procedure of a new version. All or just thoses stored procedure which are to be upgraded are referenced through the configuration file during the upgrade process. The configuration file is stored on a separate storage media 4 provided in the computer system 1 or the storage media on which the database 2 is also stored.
Before the database is accessed by an entity (e.g. an application) from a workstation 3, the configuration file is read to see which stored procedure to use. If there is no entry in the configuration file for a specific stored procedure, the stored procedure as known to the system is used. A configuration file according to the invention can be a simple text file and may look as follows:
Table 2
# UPGRADE CONFIGURATION FILE
# #ENTRIES : name of stored procedure known to the system; #base version; target version; upgrade version sp_a; sp_a_l .0 ; sp_a_l .1 ; sp_a_upgr sp_b; sp_b sp_c; sp__c_l .0 ; sp_c_l .1 ; sp_c_upgr
During normal operation the entries in the configuration file refer only to one set of stored procedures, i.e. the base version. When a workstation accesses the database the system looks up the momentarily valid name or version of the stored procedure to which the specific transaction initiated by the workstation is linked. For example, if the
access from a workstation requires that stored procedure sp_a is processed the system will look up the valid version of stored procedure sp_a in the configuration file. In the above file, the valid version of stored procedure sp_a is sp_a_l .0 which is then used by the system to perform the transaction requested by the workstation.
In case of an upgrade of the database, new versions of all or some stored procedures are to be installed in the database. It is also possible that a new stored procedure is added to the database. According to the invention, the configuration file is updated with names/versions of the new stored procedures, i.e. the target versions are added. To keep old and new tables of the database synchronized additional stored procedures sp_a_upgr and sp_c_upgr are added to the configuration file. The additional stored procedures sp_a_upgr and sp_c_upgr are used only during the upgrade process and use the new and the old stored procedures to update both the new and the old tables, resepctively, in accordance with transactions initiated by the workstations.
For example, during an upgrade the additional stored procedure sp_a_upgr iniates at the workstation two branches of processing on the basis of base version sp_a_l .0 and new version sp_a_l .1 whereby data is processed and updated in both the new and the old tables of the database system. With respect to stored procedure sp_b, there exists no additional stored procedure since stored procedure sp_b is not upgraded, i.e. remains the same in the old and the new database. The system will refer to the basic version sp_b in such case and use the base version for both the old and the new tables.
The switch over from the old stored procedure to the new stored procedures is performed by updating the
configuration file and reread it. To update and reread the configuration file is a very fast operation, so that the users of the system will only experience a small delay and no downtime .
A third method for handling versions of database components could be a combination of a systemtable and a configuration file. The systemtable will refer to some stored procedures while the configuration file will refer to other stored procedures.
The other components of the database can be handled in the same manner. For example, to be able to hold two or more versions of tables, the tables could be referenced through the systemtable or configuaration file and treated similiary as outlined above with respect of stored procedures .
Claims
1. Method for upgrading a database using a table for storing data and a stored procedure for processing data stored in said table of said database, said database running on a computer system, comprising the steps of:
creating new a table in said database; - copying and/or transforming data from said table to said new table; adding a new version (sp_a_l.l, sp_b_l .1 ) of said stored procedure to said database; and adding an additional stored procedure (sp_a_upgr, sp_b_upgr, ... ) to the database which refers to both the previous version (sp_a_1.0, sp_b_1.0) and the new version (sp_a_l.l, sp__b_l.l) of the stored procedure whenever data is to be processed with the stored procedure, for causing data processing to take place in accordance with the previous version (sp_a_1.0, sp_b_1.0) and the new version (sp_a_l.l, sp_b_l.l) of the stored procedure.
2. Method for upgrading a database according to claim 1 characterized in that a systemtable creates a link to said additional stored procedure (sp_a_upgr, sp_c_upgr) .
3. Method for upgrading a database according to claim 2 characterized in that said systemtable is a table of said database.
4. Method for upgrading a database according to claim 1,
2 or 3 characterized in that a configuration file creates a link to said additional stored procedure (sp_a_upgr, sp c upgr) .
5. Method for upgrading a database according to claim 4 characterized in that said configuration file is stored on a storage medium (4) of said computer system.
6. Method for upgrading a database by replacing an old version with a new version of a component of the database providing database functionality, said database running on a computer system characterized in that during the upgrade the old version (sp_a_1.0, sp_c_1.0) and the new version (sp_a_l.l, sp_c_l.l) of the database component providing database functionality are used at least temporarily in parallel and that reference to both versions is made through an additional component (sp_a__upgr, sp_b_upgr) of the database providing a link to both versions of the database component.
7. Method according to claim 6 characterized in that said link is provided by means of a systemtable referring an access to said component (sp_a, sp_c) of the database to said additional component (sp_a_upgr, sp_c_upgr) .
8. Method according to claim 7 characterized in that said systemtable is a table of said database.
9. Method according to claim 6, 7 or 8 characterized in that said link is provided by means of a configuration file referring an access to said component (sp_a, sp_c) of the database to said additional component (sp_a_upgr, sp_c_upgr) .
10. Method according to claim 9 characterized in that said configuration file is stored on a storage medium (4) of said computer system.
11. Method according to any one of claims 6 to 10 characterized in said component of the database is a stored procedure.
12. Method according to any one of claims 6 to 10 characterized in that said component of the database is a trigger.
13. Method according to any one of claims 6 to 10 characterized in that said component of the database is an index.
14. Method according to any one of claims 6 to 10 characterized in that said component of the database is a table.
15. Method according to claim 14 characterized in that the new version of said table has a format different from the format of the old version of said table.
16. Method for upgrading a database using a table for storing data, said database running on a computer system, comprising the steps of:
creating a new table in said database; defining data sets of a predetermined granularity within the table on the basis of the time required to copy and/or transform data to the new table, during which time the data set can not be accessed; and copying and/or transforming data from said table to said new table, wherein data sets are handled jointly.
17. Method according to claim 16 characterized in that said data sets are defined to be the table.
18'. Method according to claim 16 characterized in that said data sets are defined to be a page of the table.
19. Method according any one of claims 16 to 18 characterized in that said database using a stored procedure for processing data stored in said table of said database, comprising the steps of:
adding a new version (sp_a_l.l, sp_b_l.l) of said stored procedure to said database; and adding an additional stored procedure (sp_a_upgr, sp_b_upgr, ...) to the database which refers to both the previous version (sp_a_1.0, sp_b_1.0) and the new version (sp_a_l.l, sp_b_l.l) of the stored procedure whenever data is to be processed with the stored procedure, for causing data processing to take place in accordance with the previous version (sp_a_1.0, sp_b_1.0) and the new version (sp_a_l.l, sp_b_l.l) of the stored procedure.
20. Method for upgrading a database according to claim 19 characterized in that a systemtable creates a link to said additional stored procedure (sp_a_upgr, sp_c__upgr) .
21. Method for upgrading a database according to claim 20 characterized in that said systemtable is a table of said database.
22. Method for upgrading a database according to claim 19, 20 or 21 characterized in that a configuration file creates a link to said additional stored procedure (sp_a_upgr, sp_c_upgr) .
23. Method for upgrading a database according to claim 22 characterized in that said configuration file is stored on a storage medium (4) of said computer system.
24. Method for upgrading a database according to claims 16 to 18, comprising the step of replacing an old version with a new version of a component of the database providing database functionality, wherein during the upgrade the old version (sp a 1.0, sp_c_1.0) and the new version (sp a 1.1, sp_c_l.l) of the database component providing database functionality are used at least temporarily in parallel and that reference to both versions is made through an additional component (sp_a_upgr, sp_b_upgr) of the database providing a link to both versions of the database component .
25. Method according to claim 24 characterized in that said link is provided by means of a systemtable referring an access to said component (sp_a, sp_c) of the database to said additional component (sp_a_upgr, sp_c_upgr) .
26. Method according to claim 25 characterized in that said systemtable is a table of said database.
27. Method according to claim 24, 25 or 26 characterized in that said link is provided by means of a configuration file referring an access to said component (sp_a, sp_c) of the database to said additional component (sp_a_upgr, sp_c_upgr) .
28. Method according to claim 27 characterized in that said configuration file is stored on a storage medium (4) of said computer system.
29. Method according to any one of claims 24 to 28 characterized in said component of the database is a stored procedure.
30. Method according to any one of claims 24 to 28 characterized in that said component of the database is a trigger.
31. Method according to any one of claims 24 to 28 characterized in that said component of the database is an index.
32. Method according to any one of claims 6 to 28 characterized in that said component of the database is a table.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00125246A EP1091305B1 (en) | 1997-08-08 | 1998-08-07 | Method for upgrading a database |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19734413 | 1997-08-08 | ||
DE19734413A DE19734413C1 (en) | 1997-08-08 | 1997-08-08 | Procedure for upgrading a database |
PCT/EP1998/005026 WO1999008206A1 (en) | 1997-08-08 | 1998-08-07 | Method for upgrading a database |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00125246.9 Division-Into | 2000-11-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1002287A1 true EP1002287A1 (en) | 2000-05-24 |
Family
ID=7838416
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00125246A Expired - Lifetime EP1091305B1 (en) | 1997-08-08 | 1998-08-07 | Method for upgrading a database |
EP98946302A Ceased EP1002287A1 (en) | 1997-08-08 | 1998-08-07 | Method for upgrading a database |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00125246A Expired - Lifetime EP1091305B1 (en) | 1997-08-08 | 1998-08-07 | Method for upgrading a database |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP1091305B1 (en) |
AU (1) | AU9340598A (en) |
DE (1) | DE19734413C1 (en) |
WO (1) | WO1999008206A1 (en) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6385770B1 (en) * | 1999-01-29 | 2002-05-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Software upgrade |
US6931630B1 (en) | 2000-09-27 | 2005-08-16 | International Business Machines Corporation | Method of, system for, and computer program product for providing automatic identification of a computer program code candidate for web deployment or a stored procedure |
TWI242725B (en) | 2001-06-11 | 2005-11-01 | Oce Tech Bv | A method for executing a hot migrate operation through an incremental roll-over process that uses migration plug-in means for conversion during an upgrade transition, and a multiprocessing system and a system arranged for implementing such method |
EP1267263A3 (en) * | 2001-06-11 | 2006-06-28 | Océ-Technologies B.V. | Hot migration through incremental roll-over using migration plug-ins for conversion during upgrade |
ATE277380T1 (en) | 2001-06-12 | 2004-10-15 | Sap Ag | METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR CHANGING THE DATA STRUCTURE WITH WHICH AN APPLICATION PROGRAM ACCESSES DATABASE SYSTEMS IN A COMPUTER SYSTEM |
US8010887B2 (en) | 2001-09-21 | 2011-08-30 | International Business Machines Corporation | Implementing versioning support for data using a two-table approach that maximizes database efficiency |
US7523142B2 (en) | 2001-12-17 | 2009-04-21 | Sap Ag | Systems, methods and articles of manufacture for upgrading a database with a shadow system |
DE10318621A1 (en) | 2003-04-24 | 2004-11-25 | Siemens Ag | Conveyor for the transport of load carriers |
US7680825B2 (en) | 2005-12-30 | 2010-03-16 | Sap Ag | Systems and methods for generating tenant-specific properties for use in a provider-tenant environment |
US7693851B2 (en) | 2005-12-30 | 2010-04-06 | Sap Ag | Systems and methods for implementing a shared space in a provider-tenant environment |
US7689593B2 (en) | 2005-12-30 | 2010-03-30 | Sap Ag | Systems and methods for accessing a shared space in a provider-tenant environment |
US7917607B2 (en) | 2005-12-30 | 2011-03-29 | Sap Ag | Software management systems and methods, including use of such systems and methods in a provider-tenant environment |
US7698284B2 (en) | 2005-12-30 | 2010-04-13 | Sap Ag | Systems and methods for deploying a tenant in a provider-tenant environment |
US7818740B2 (en) * | 2006-05-05 | 2010-10-19 | Microsoft Corporation | Techniques to perform gradual upgrades |
US7739348B2 (en) | 2006-12-29 | 2010-06-15 | Sap Ag | Systems and methods for accessing a shared space in a provider-tenant environment by using middleware |
US7933869B2 (en) | 2006-12-29 | 2011-04-26 | Sap Ag | Method and system for cloning a tenant database in a multi-tenant system |
US8069184B2 (en) | 2006-12-29 | 2011-11-29 | Sap Ag | Systems and methods to implement extensibility of tenant content in a provider-tenant environment |
US8200634B2 (en) | 2008-10-08 | 2012-06-12 | Sap Ag | Zero downtime maintenance using a mirror approach |
US8224828B2 (en) | 2009-12-22 | 2012-07-17 | Sap Ag | Multi-client generic persistence for extension fields |
US9031910B2 (en) | 2013-06-24 | 2015-05-12 | Sap Se | System and method for maintaining a cluster setup |
US9619490B2 (en) * | 2014-04-11 | 2017-04-11 | Nutanix, Inc. | Mechanism for performing lockless rolling upgrade of NoSQL database |
US9858309B2 (en) | 2014-10-07 | 2018-01-02 | Sap Se | Managing write accesses during database upgrade procedure |
US10262054B2 (en) * | 2016-01-21 | 2019-04-16 | Microsoft Technology Licensing, Llc | Database and service upgrade without downtime |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5287496A (en) * | 1991-02-25 | 1994-02-15 | International Business Machines Corporation | Dynamic, finite versioning for concurrent transaction and query processing |
US5396623A (en) * | 1992-10-30 | 1995-03-07 | Bmc Software Inc. | Method for editing the contents of a DB2 table using an editproc manager |
US5359730A (en) * | 1992-12-04 | 1994-10-25 | International Business Machines Corporation | Method of operating a data processing system having a dynamic software update facility |
US5440735A (en) * | 1993-10-08 | 1995-08-08 | International Business Machines Corporation | Simplified relational data base snapshot copying |
US6112253A (en) * | 1995-10-12 | 2000-08-29 | International Business Machines Corporation | Object-oriented method maintenance mechanism that does not require cessation of the computer system or its programs |
-
1997
- 1997-08-08 DE DE19734413A patent/DE19734413C1/en not_active Expired - Fee Related
-
1998
- 1998-08-07 AU AU93405/98A patent/AU9340598A/en not_active Abandoned
- 1998-08-07 EP EP00125246A patent/EP1091305B1/en not_active Expired - Lifetime
- 1998-08-07 EP EP98946302A patent/EP1002287A1/en not_active Ceased
- 1998-08-07 WO PCT/EP1998/005026 patent/WO1999008206A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9908206A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1091305A1 (en) | 2001-04-11 |
EP1091305B1 (en) | 2003-10-29 |
AU9340598A (en) | 1999-03-01 |
DE19734413C1 (en) | 1999-01-07 |
WO1999008206A1 (en) | 1999-02-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1091305A1 (en) | Method for upgrading a database | |
US5625815A (en) | Relational database system and method with high data availability during table data restructuring | |
US6564215B1 (en) | Update support in database content management | |
US7801850B2 (en) | System of and method for transparent management of data objects in containers across distributed heterogenous resources | |
US6460048B1 (en) | Method, system, and program for managing file names during the reorganization of a database object | |
JP4759570B2 (en) | Techniques for providing locks for file operations in database management systems | |
US6088694A (en) | Continuous availability and efficient backup for externally referenced objects | |
US5386559A (en) | Variant domains and variant maps in a versioned database management system | |
AU2005316812B2 (en) | Infrastructure for performing file operations by a database server | |
US20090240704A1 (en) | Method, System, and Program Product for Migrating Data from One Data Base Management System to Another Data Base Management System | |
US10528341B2 (en) | User-configurable database artifacts | |
US7054887B2 (en) | Method and system for object replication in a content management system | |
US7389313B1 (en) | System and method for creating a snapshot copy of a database | |
US9652346B2 (en) | Data consistency control method and software for a distributed replicated database system | |
EP2059881B1 (en) | Method for managing simultaneous modification of database objects during development | |
CN107077491B (en) | Online mode and data transformation | |
WO2003102778A2 (en) | System and method for accessing different types of back end data stores | |
KR20030094328A (en) | System and method for reorganizing stored data | |
Cisco | CiscoSecureACS Database Structure | |
KR100243113B1 (en) | Database management system | |
US7209919B2 (en) | Library server locks DB2 resources in short time for CM implicit transaction | |
Sinclair | From Access to SQL Server | |
Bers et al. | Oracle Transparent Gateway for DB2 Installation and User’s Guide, 10g Release 2 (10.2) for IBM z/OS (OS/390) B16220-02 | |
Iversland et al. | Decentralization of Databases and the Communication between Them | |
Berkeley | Oracle Berkeley DB |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20000112 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): FR GB IT |
|
17Q | First examination report despatched |
Effective date: 20000809 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 20021017 |