Patent Publication Number: US-2018032749-A1

Title: On-demand database service system, method and computer program product for conditionally allowing an application of an entity access to data of another entity

Description:
CLAIM OF PRIORITY 
     This application is a continuation of U.S. application Ser. No. 13/866,801, filed Apr. 19, 2013, which is a continuation of U.S. application Ser. No. 13/370,247, filed Feb. 9, 2012, which is a continuation of U.S. application Ser. No. 12/176,026, filed Jul. 18, 2008, which claims the benefit of U.S. Provisional Patent Application No. 60/950,836, filed Jul. 19, 2007, the entire contents of which are incorporated herein by reference. 
    
    
     COPYRIGHT NOTICE 
     A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever. 
     FIELD OF THE INVENTION 
     The current invention relates generally to database systems, and more particularly to securely allowing access to data in database systems. 
     BACKGROUND 
     The subject matter discussed in the background section should not be assumed to be prior art merely as a result of its mention in the background section. Similarly, a problem mentioned in the background section or associated with the subject matter of the background section should not be assumed to have been previously recognized in the prior art. The subject matter in the background section merely represents different approaches, which in and of themselves may also be inventions. 
     In conventional database systems, users access their data resources in one logical database. A user of such a conventional system typically retrieves data from and stores data on the system using the user&#39;s own systems. A user might remotely access one of a plurality of server systems that might in turn access the database system. Data retrieval from the system might include the issuance of a query from the user system to the database system. The database system might process the request for information received in the query and send to the user system information relevant to the request. 
     There is often a desire to allow access to data in database systems by third party applications. To date, such data access has been provided with limited security measures, etc. For example, even if the third party application is generally authorized for data access, such authorization may, in turn, allow for broad-based access to all data, unlimited actions taken on such data, etc. Unfortunately, such limitations render such data subject to additional risk of undesired access by third parties. 
     BRIEF SUMMARY 
     In accordance with embodiments, there are provided mechanisms and methods for conditionally allowing an application of an entity access to data of another entity in an on-demand database service. These mechanisms and methods for conditionally allowing an application of an entity access to data of another entity in an on-demand database service can enable embodiments to limit such access to the data, as desired. Furthermore, embodiments of such mechanisms and methods may provide additional security when sharing data among different subscribers to an on-demand database service. 
     In an embodiment and by way of example, a method is provided for conditionally allowing an application of an entity access to data of another entity in an on-demand database service. In use, a request is received from an application created by a first entity. The request includes a request to access data of a second entity stored in a database of an on-demand database service. It is then determined whether the application is authorized to access the data of the second entity stored in the database of the on-demand database service. Conditional access is then allowed to the data of the second entity stored in the database of the on-demand database service, based on the foregoing determination. 
     While the present invention is described with reference to an embodiment in which techniques for conditionally allowing an application of an entity access to data of another entity in an on-demand database service are implemented in an application server providing a front end for a multi-tenant database on-demand service, the present invention is not limited to multi-tenant databases or deployment on application servers. Embodiments may be practiced using other database architectures, i.e., ORACLE®, DB2® and the like without departing from the scope of the embodiments claimed. 
     Any of the above embodiments may be used alone or together with one another in any combination. Inventions encompassed within this specification may also include embodiments that are only partially mentioned or alluded to or are note mentioned or alluded to at all in this brief summary or in the abstract. Although various embodiments of the invention may have been motivated by various deficiencies with the prior art, which may be discussed or alluded to in one or more places in the specification, the embodiments of the invention do not necessarily address any of these deficiencies. In other words, different embodiments of the invention may address different deficiencies that may be discussed in the specification. Some embodiments may only partially address deficiencies or just one deficiency that may be discussed in the specification, and some embodiments may not address any of these deficiencies. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a method for conditionally allowing an application of an entity access to data of another entity in an on-demand database service, in accordance with one embodiment. 
         FIG. 2  shows a method for conditionally allowing an application of an entity access to data of another entity in an on-demand database service, in accordance with another embodiment. 
         FIG. 3  shows a method for conditionally allowing an application of an entity access to data of another entity in an on-demand database service, in accordance with another embodiment. 
         FIG. 4  illustrates a block diagram of an example of an environment wherein an on-demand database service might be used. 
         FIG. 5  illustrates a block diagram of an embodiment of elements of  FIG. 4  and various possible interconnections between these elements. 
     
    
    
     DETAILED DESCRIPTION 
     General Overview 
     Systems and methods are provided for conditionally allowing an application of an entity access to data of another entity in an on-demand database service. 
     To data, data access has been provided in the context of database systems with limited security measures, etc. Unfortunately, such limitations render such data subject to additional risk of undesired access by third parties. Thus, mechanisms and methods are provided herein for conditionally allowing an application of an entity access to data of another entity in an on-demand database service and to limit such access to the data, as described. Additionally. embodiments of such mechanisms and methods may provide additional security when sharing data among different subscribers to an on-demand database service. 
     Next, mechanisms and methods for conditionally allowing an applications of an entity access to data of another entity in an on-demand database service will be described with reference to exemplary embodiments. 
       FIG. 1  shows a method  100  for conditionally allowing an application of an entity access to data of another entity in an on-demand database service, in accordance with one embodiment. In operation, a request is received from an application created by a first entity. See operation  102 . In this case, the request includes a request to access data of a second entity stored in a database of an on-demand database service. 
     In the context of the present description, an on-demand database service may include any service that relies on a database system that is accessible over a network. In one embodiment, the on-demand database service may include a multi-tenant on-demand database service. In the present description, such multi-tenant on-demand database service may include any service that relies on a database system that is accessible over a network, in which various elements of hardware and software of the database system may be shared by one or more customers. For instance, a given application server may simultaneously process requests for a great number of customers, and a given database table may store rows for a potentially much greater number of customers. 
     Once the request is received from the application created by a first entity, it is determined whether the application is authorized to access the data of the second entity stored in the database of the on-demand database service. See operation  104 . Furthermore, the access to the data of the second entity stored in the database of the on-demand database service is conditionally allowed, based on the determination. See operation  106 . 
     In the context of the present description, an entity may refer to any individual, company, group, or organization. Furthermore, the first and second entities may include related entities (e.g. organizations within the same company, etc.) or unrelated entities (e.g. two separate companies, etc.) For example, in one embodiment, the first entity and the second entity may include different organizations. In another embodiment, the first entity and the second entity may include different divisions of a single organization. 
     Furthermore, the applications may include any computer code (e.g. a complete program, a partial program, a code segment, etc.) capable of being created by an entity example, in one embodiment, the application may include business logic. As an option, the application may be served by the on-demand database service. 
     In one embodiment, a plurality of data access limitations may be associated with the application. In this case, data access limitations refer to any limitation imposed on the ability to access data. For example, the data access limitations may include limitations on at least one action that may be performed on the data of the second entity stored in the database of the on-demand database service. 
     As another example, the data access limitations may include limitations on at least one type of the data of the second entity stored in the database of the on-demand database service that can be accessed. Furthermore, the data access limitations may include the plurality of data access levels. 
     As an option, the data access limitations may be included with the application in a package. In this case, the package may be installed by the second entity. Additionally, the access to the data of the second entity stored in the database may be subject to the data access limitations. 
     In one embodiment, the data access limitations may be determined by the second entity. In this case, the data access limitations may be presented to the second entity for acceptance by the second entity. For example, the data access limitations may be presented to the second entity using a user interface. Using the user interface, the second entity may be allowed to accept or reject the access limitations. As an option, the access to the data of the second entity stored in the database of the on-demand service may be conditionally allowed, based on the acceptance. 
     In still another embodiment, an update associated with the application may be received. For example, the update may be received as part of the package. After receiving the update, the update may be presented to the second entity for acceptance. In this case, the access to the data of the second entity stored in the database of the on-demand database service may be conditionally allowed utilizing the update, based on the acceptance. 
       FIG. 2  shows a method  200  for conditionally allowing an application of an entity access to data of another entity in an on-demand database service, in accordance with another embodiment. As an option, the present method  200  may be implemented in the context of the functionality of  FIG. 1 . Of course, however, the method  200  may be carried out in any desired environment. The aforementioned definitions may apply during the present description. 
     As shown, a package is created. See operation  202 . In this case, the package may be created by a third party service such as an on-demand database service provider. Furthermore, the package may include a grouping of various objects (e.g. applications, etc.), custom logic, and/or computer code. For example, in various embodiments, the package may include a standalone client object to be installed on a client device (e.g. a data loader, an Outlook edition, etc.) a custom component (e.g. s-control, a custom tab, a web link, a URL formula field, etc.), and Apex trigger or web service (e.g. for creating follow-up tasks, etc.), and work flow items. 
     Once the package is created, a profile is defined. See operation  204 . In this case, the profile may define an access level of the package. For example, in various embodiments, the profile may include an all access profile, a package access profile, or a custom access profile. 
     In one embodiment, the full access profile may allow for total access to information associated with an entity. Additionally, the package access profile may allow for access to information, applications, and data associated with the package. A custom access profile may allow for access to specific portions of the package and/or information associated with an entity. 
     Once the profile has been defined, the package is uploaded with the appropriate profile settings. See operation  206 . In this case, the package may be uploaded to an on-demand database service instance associated with an entity. As an option, the on-demand database service provider may define an initial profile and upload the package. 
       FIG. 3  shows a method  300  for conditionally allowing an application of an entity access to data of another entity in an on-demand database service, in accordance with another embodiment. As an option, the present method  300  may be implemented in the context of the functionality of  FIGS. 1-2 . Of course, however, the method  300  may be carried out in any desired environment. Again, the aforementioned definitions may apply during the present description. 
     As shown, it is determined whether a user is authorized to obtain a package. See operation  302 . In this case, the user may include any entity using an on-demand database service. Additionally, the determination of whether the user is authorized to obtain the package may include authenticating the user. In various embodiments, such authenticating may include verifying a user name, password, key, and/or various other authentication techniques. 
     If it is determined that the user is authorized to obtain the package, the user obtains the package. See operation  304 . The package is then installed. See operation  306 . 
     In one embodiment, the package may include an application. In this case, the application may be authenticated before any install is initiated. Thus, the installation of the package may be conditionally allowed based on the authentication. 
     Profiles are then extracted from the package. See operation  308 . In this case, the profiles may be utilized to determine limitations on data and/or program access fro the user. These limitations are then presented to the user. See operation  310 . 
     It is then determined whether to accept or reject the limitations. See operation  312 . For example, a first user may be presented with limitations indicating that an application of a second user will have access to data, applications, or information upon acceptance of the limitations. Depending on the situation, the first user may choose to grant more access or less access to the application of the second user. 
     If the user is satisfied with the limitations, the user may accept the limitations and the limitations will be implemented. See operation  316 . On the other hand, the user may choose to reject the limitations and add or remove limitations. In this case, the user may present the limitations such that the further limitations are received. See operation  314 . These limitations may then be implemented. In this way, the security profile of a user of an on-demand database service may be implemented to conditionally allow an application of another user access to data in the on-demand database. 
     For example, the user security profile may determine what objects (e.g. applications, code, etc.) a user may access and how a user may utilize each object type [e.g. create, read, update, and delete (CRUD)]. In one embodiment, the user security profile may be defined as part of the definition of a custom user control/web link. 
     For example, when a session is issued via a login or merge field, the session may be associated with a specific application programming interface (API) client. When that session is used for an API call, an on-demand database service may verify that the client applications for that session are authorized to perform the requested action against the provided object type. In some cases, the session may be restricted to the actions for which the user is authorized. This may make sessions much less valuable targets for malicious third parties. This may also make sessions less interchangeable, increasing the security of security features such as white listing. 
     In one embodiment, the user security profile may be defined by an applications developer as part of a component definition and may be included in a package that includes that component definition. In this case, developers may be free to request any desirable privileges for the client applications. 
     As an option, when a user installs a package that includes a component with a security profile, the user may be presented with an interface as part of the install process which describes the privileges that are required for the application (e.g. a summary of the security profile). In this case, the user may be permitted to authorize the application in order to complete the installation. When a package is removed, the security profile may likewise be removed. 
     In one embodiment, security profiles may be defined at a package level and applied to all components in the package (e.g. s-controls, web links, custom clients, etc.). In this case, to configure the security profile of a component, the developer may choose between one of three levels of CRUD access. For example, the developer may choose CRUD access to the package (e.g. custom objects and standard objects with custom fields from the package), custom access (e.g. user chooses access level to package objects and standard objects or access to custom objects from outside the package), or universal CRUD (e.g. access to all objects). In this case, describe calls may reflect CRUD access for the application. 
     In addition to CRUD privileges, there may be a section of special privileges that can be enabled/disabled for the client application. For example, in various embodiments, special privileges may include write access to metadata, access to describe calls, and access to special methods (e.g. queryAll, undelete, merge, convertLead, process, etc.). 
     In one embodiment, the default security profile for new/existing applications may be access to the complete API. Developers may choose to reduce the privileges required for an application, and may do so at any point in a development cycle. As an option, the security profile may be displayed to installers. 
     In one embodiment, API client access may be allowed to any users data as long as the user is logged in with authorized credentials. In another embodiment, a user may have the ability to modify access limitations. For example, a user may have the ability to modify packageable custom components (e.g. s-controls, links, field URL formulas, Apex code web services, Apex code, etc.). 
     In this way, another user may have limited access to only objects or code in the dame package, or standard entity access which may be limited to the access specified in the profile. Additionally, users may control the type of data being accessed by a particular partner client application, upgrade, or an extension. As an option, user or identification tokens (e.g. a user name string, etc.) may allow limited access to data to limit the security risks associated with unrestricted access. During an install, permissions in a packaged user security profile may be displayed in read-only mode to the installing user. This may give the user the ability to accept or reject the package installation based on the requested permissions. 
     Table 1 shows standard security profile options given to developer of an application, in accordance with one embodiment. 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 Read 
                 Create 
                 Update 
                 Delete 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                   
                 Accounts 
                 ✓ 
                 ✓ 
                 ✓ 
                 ✓ 
               
               
                   
                 Contracts 
                 ✓ 
                 ✓ 
                   
                 ✓ 
               
               
                   
                 Opportunities 
                 ✓ 
               
               
                   
                   
               
            
           
         
       
     
     In addition to any access permissions requested by a user, there may be a list of objects and Apex packages accessed by packaged Apex code. In one embodiment, these values may come from Java Apex wrapping code and may require static analysis of the code. 
     Table 2 shows Apex code object access, in accordance with one embodiment. 
     
       
         
           
               
               
               
               
             
               
                   
                 TABLE 2 
               
               
                   
                   
               
               
                   
                 Read 
                 Create 
                 Update 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 Events 
                 ✓ 
                   
                   
               
               
                   
                 Tasks 
                 ✓ 
                 ✓ 
                   
               
               
                   
                   
               
            
           
         
       
     
     Table 3 shows Apex code delete access, in accordance with one embodiment. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 3 
               
               
                   
                   
               
               
                   
                 Class Name 
                 Package Name 
               
               
                   
                   
               
             
            
               
                   
                 accountDelete 
                 accountUtils 
               
               
                   
                 contactDelete 
                 contactUtils 
               
               
                   
                 deleteUtil 
                 genericUtils 
               
               
                   
                   
               
            
           
         
       
     
     Table 4 shows Apex code package access, in accordance with one embodiment. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 4 
               
               
                   
                   
               
               
                   
                 Name 
                 This Package 
               
               
                   
                   
               
             
            
               
                   
                 myPackage_cleanupTasks 
                 ✓ 
               
               
                   
                 partnerPackage_createEvent 
               
               
                   
                 insertAccounts 
               
               
                   
                   
               
            
           
         
       
     
     As an upgrade, entity permissions and user permission levels may change to add or remove privileges using an upgrade install. In some cases, cache may be cleared after the upgrade install is complete. 
     In one embodiment, there may be two types of packages, a abase package and package extension. Both types of packages may be upgradeable if the base package type is managed. When a package is upgraded, the extension may be added, or an extension may be upgraded, such that user permissions may change. In case the permissions change, an install confirmation interface may highlight the differences between existing and new permissions. 
     At runtime, appropriate access to users may be enforces based on the access level configured in the security profile if one may be defined for the package. If the profile is not defined or if a user does not belong to a package, access may be assumed to be only limited by user profile permissions. 
     Permission checks may be implemented using different techniques. In one embodiment, the checks may be performed in the java level (e.g. on entity information, mayEdit, mayDelete, etc.). In another embodiment, the checks may be performed in a database at the PL/SQL level. 
     System Overview 
       FIG. 4  illustrates a block diagram of an environment  410  wherein an on-demand database service might be used. As an option, any of the previously described embodiments of the foregoing figures may or may not be implemented in the context of the environment  410 . Environment  410  may include user systems  412 , network  414 , system  416 , processor system  417 , application platform  418 , network interface  420 , tenant data storage  422 , system data storage  424 , program code  426 , and process space  428 . In other embodiments, environment  410  may not have all of the components listed and/or may have other elements instead of, or in addition to, those listed above. 
     Environment  410  is an environment in which an on-demand database service exists. User system  412  may be any machine or system that is used by a user to access a database user system. For example, any of user systems  412  can be a handheld computing device, a mobile phone, a laptop computer, a work station, and/or a network of computing devices. As illustrated in  FIG. 4  (and in more detail in  FIG. 5 ) user systems  412  might interact via a network with an on-demand database service, which is system  416 . 
     An on-demand database service, such as system  416 , is a database system that is made available to outside users that do not need to necessarily be concerned with building and/or maintaining the database system, but instead may be available for their use when the users need the database system (e.g., on the demand of the users). Some on-demand database services may store information from one or more tenants stored into tables of a common database image to form a multi-tenant database system (MTS). Accordingly, “on-demand database service  416 ” and “system  416 ” will be used interchangeably herein. A database image may include one or more database objects. A relational database management system (RDMS) or the equivalent may execute storage and retrieval of information against the database object(s). Application platform  418  may be a framework that allows the applications of system  416  to run, such as the hardware and/or software, e.g., the operating system. In an embodiment, on-demand database service  416  may include an application platform  418  that enables creation, managing and executing one or more applications developed by the provider of the on-demand database service, users accessing the on-demand database service via user systems  412 , or third party application developers accessing the on-demand database service via user systems  412 . 
     The users of user systems  412  may differ in their respective capacities, and the capacity of a particular user system  412  might be entirely determined by permissions (permission levels) for the current user. For example, where a salesperson is using a particular user system  412  to interact with system  416 , that user system has the capacities allotted to that salesperson. however, while an administrator is using that user system to interact with system  416 , that user system has the capacities allotted tot hat administrator. In systems with a hierarchial role model, users at one permission level may have access to applications, data, and database information, database information, and data accessible by a user at a higher permission level. Thus, different users will have different capabilities with regard to accessing and modifying application and database information, depending on a user&#39;s security or permission level. 
     Network  414  is any network or combination of networks of devices that communicate with one another. For example, network  414  can be any one or any combination of a LAN (local area network), WAN (wide area network), telephone network, wireless network, point-to-point network, star network, token ring network, hub network, or other appropriate configuration. As the most common type of computer network in current use is a TCP/IP (Transfer Control Protocol and Internet Protocol) network, such as the global internetwork of networks often referred to as the “Internet” with a capital “I,” that network will be used in many of the examples herein. however, it should be understood that the networks that the present invention might use are not so limited, although TCP/IP is a frequently implemented protocol. 
     User systems  412  might communicate with system  416  suing TCP/IP and, at a higher network level, use other common Internet protocols to communicate, such as HTTP, FTP, AFS, WAP, etc. In an example where HTTP is used, user system  412  might include an HTTP client commonly referred to as a “browser” for sending and receiving HTTP messages to and from an HTTP server at system  416 . Such an HTTP server might be implemented as the sole network interface between system  416  and network  414 , but other techniques might be used as well or instead. In some implementations, the interface between system  416  and network  414  includes load sharing functionality, such as round-robin HTTP request distributors to balance loads and distribute incoming HTTP requests evenly over a plurality of servers. At least as for the users that are accessing that server, each of the plurality of servers has access to the MTS&#39; data; however, other alternative configurations may be used instead. 
     In one embodiment, system  416 , shown in  FIG. 4 , implements a web-based customer relationship management (CRM) system. For example, in one embodiment, system  416  includes application servers configured to implement and execute CRM software applications as well as provide related data, code, forms, webpages and other information to and from user systems  412  and to store to, and retrieve from, a database system related data, objects, and Webpage content. With a multi-tenant system, data for multiple tenants may be stored in the same physical database object, however, tenant data typically is arranged so that data of one tenant is kept logically separate from that of other tenants so that one tenant does not have access to another tenant&#39;s data, unless such data is expressly shared. In certain embodiments, system  416  implements applications other than, or in addition to, a CRM application. For example, system  416  may provide tenant access to multiple hosted (standard and custom) applications, including a CRM application. User (or third party developer) applications, which may or may not include CRM, may be supported by the application platform  418 , which manages creation, storage of the applications into one or more database objects and executing of the applications in a virtual machine in the process space of the system  416 . 
     One arrangement for elements of system  416  is shown in  FIG. 5 , including a network interface  420 , application platform  418 , tenant data storage  422  for tenant data  423 , system data storage  424  for system data accessible to system  416  and possibly multiple tenants, program code  426  for implementing various functions of system  416 , and a process space  428  for executing MTS system processes and tenant-specific processes, such as running applications as part of an application hosting service. Additional processes that may execute on system  416  include database indexing processes. 
     Several elements in the system shown in  FIG. 4  include conventional, well-known elements that are explained only briefly here. For example, each user system  412  could include a desktop personal computer, workstation, laptop, PDA, cell phone, or any wireless access protocol (WAP) enabled device or any other computing device capable of interfacing directly or indirectly to the Internet or other network connection. User system  412  typically runs an HTTP client, e.g., a browsing program, such as Microsoft&#39;s Internet Explorer browser, Netscape&#39;s Navigator browser, Opera&#39;s browser, or a WAP-enabled browser in the case of a cell phone, PDA or other wireless device, or the like, allowing a user (e.g. subscriber of the multi-tenant database system) of user system  412  to access, process and view information, pages and applications available to it from system  416  over network  414 . Each user system  412  also typically includes one or more user interface devices, such as a keyboard, a mouse, trackball, touch pad, touch screen, pen or the like, for interacting with a graphical user interface (GUI) provided by the browser on a display (e.g. a monitor screen LCD display, etc.) inn conjunction with pages, forms applications and other information provided by system  416  or other systems or servers. For example, the user interface device can be used to access data and applications hosted by system  416 , and to perform searches on stored data, and otherwise allow a user to interact with various GUI pages that may be presented to a user. As discussed above, embodiments are suitable for use with the Internet, which refers to a specific global internetwork of networks. however, it should be understood that other networks can be used instead of the Internet, such as an intranet, an extranet, a virtual private network (VPN), a non-TCP/IP based network, any LAN or WAN or the like. 
     According to one embodiment, each user system  412  and all of its components are operator configurable using applications, such as a browser, including computer code run using a central processing unit such as an Intel Pentium® processor or the like. Similarly, system  416  (and additional instances of an MTS, where more than one is present) and all of their components might be operator configurable using application(s) including computer code to run using a central processing unit such as processor system  417  of  FIG. 4 , which may include an Intel Pentium® processor or the like, and/or multiple processor units. A computer program product embodiment includes a machine-readable storage medium (media) having instructions stored thereon/in which can be used to program a computer to perform any of the processes of the embodiments described herein. Computer code for operating and configuring system  416  to intercommunicate and to process webpages, applications and other data and media content as described herein are preferably downloaded and stored on a hard disk, but the entire program code, or portions thereof, may also be stored in any other volatile or non-volatile memory medium or device as is well known, such as a ROM or RAM, or provided on any media capable of storing program code, such as any type of rotating media including floppy disks, optical discs, digital versatile disk (DVD), compact disk (CD), microdrive, and magneto-optical disks, and magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of media or device suitable for storing instructions and/or data. Additionally, the entire program code, or portions thereof, may be transmitted and downloaded from a software source over a transmission medium, e.g., over the Internet, or from another server, as is well know, or transmitted over any other conventional network connection as is well known (e.g. extranet, VPN, LAN, etc.) using any communication medium and protocols (e.g. TCP/IP, HTTP, HTTPS, Ethernet, etc.) as are well known. It will also be appreciated that computer code for implementing embodiments of the present invention can be implemented in any programming language that can be executed on a client system and/or server or server system such as, for example, C, C++, HTML, any other markup language, Java™, JavaScript, ActiveX, any other scripting language, such as VBScript, and many other programming languages as are well known may be used. (Java™ is a trademark of Sun Microsystems, Inc.) 
     According to one embodiment, each system  416  is configured to provide webpages, forms, applications, data and media content to user (client) systems  412  to support the access by user systems  412  as tenants of system  416 . As such, system  416  provides security mechanisms to keep each tenant&#39;s data separate unless the data is shared. If more than one MTS is used, they may be located in close proximity to one another (e.g. in a server farm located in a single building or campus), or they may be distributed at locations remote from one another (e.g. one or more servers located in city A and one or more servers located in city B). As used herein, each MTS could include one or more logically and/or physically connected servers distributed locally or across one ore more geographic locations. Additionally, the term “server” is meant to include a computer system, including processing hardware and process space(s), and an associated storage system and database application (e.g. OODBMS or RDBMS) as is well known in the art. It should also be understood that “server system” and “server” are often used interchangeably herein. Similarly, the database object described herein can be implemented as single databases, a distributed database, a collection of distributed databases, a database with redundant online or offline backups or other redundancies, etc., and might include a distributed database or storage network and associated processing intelligence. 
       FIG. 5  also illustrates environment  410 . However, in  FIG. 5  elements of system  416  and various interconnections in an embodiment are further illustrated.  FIG. 5  shows that user system  412  may include processor system  412 A, memory  412 A, memory system  412 B, input system  412 C, and output system  412 D.  FIG. 5  shows network  414  and system  416 .  FIG. 5  also shows that system  416  may include tenant data storage  422 , tenant data  423 , system data storage  424 , system data  425 , User Interface (UI)  530 , Application Program Interface (API)  532 , PL/SOQL  534 , save routines  536 , application setup mechanism  538 , applications servers  500   1 - 500   N , system process space  502 , tenant storage  514 , and application metadata  516 . In other embodiments, environment  410  may not have the same elements as those listed above and/or may have other elements instead of, or in addition to, those listed above. 
     User system  412 , network  414 , system  416 , tenant data storage  4222 , and system data storage  424  were discussed above in  FIG. 4 . Regarding user system  412 , processor system  412 A may be any combination of one or more processors. Memory system  412 B may be any combination of one or more memory devices, short term, and/or long term memory. Input system  412 C may be any combination of input devices, such as one ore more keyboards, mice, trackballs, scanners, cameras, and/or interfaces to networks. Output system  412 D may be any combination of output devices, such as one ore more monitors, printers, and/or interfaces to networks. As shown by  FIG. 5 , system  416  may include a network interface  420  (of  FIG. 4 ) implemented as a set of HTTP application servers  500 , an application platform  418 , tenant data storage  422 , and system data storage  424 . Also shown is system process space  502 , including individual tenant process spaces  504  and a tenant management process space  510 . Each application server  500  may be configured to tenant data storage  422  and the tenant data  423  therein, and system data storage  424  and the systems data  425  therein to serve requests of user systems  412 . The tenant data  423  might be divided into individual tenant storage areas  512 , which can be either a physical arrangement and/or a logical arrangement of data. within each tenant storage area  512 , user storage  514  and application metadata  516  might be similarly allocated for each user. For example, a copy of MRU items for an entire organization that is a tenant might be stored to tenant storage area  512 . A UI  530  provides a user interface and an API  532  provides an application programmer interface to system  416  resident processes to users and/or developers at user systems  412 . The tenant data and the system data may be stored in various databases, such as one ore more Oracle™ databases. 
     Application platform  418  includes an application setup mechanism  538  that supports application developers&#39; creation and management of applications, which may be saved as metadata into tenant data storage  422  by save routines  536  for execution by subscribers as one or more tenant process spaces  504  managed by tenant management process  510  for example. Invocations to such applications may be coded using PL/SOQL  534  that provides a programming language style interface extension to API  532 . A detailed description of some PL/SOQL language embodiments is discussed in commonly owned U.S. Provisional Patent Application 60/828,192 entitled, “PROGRAMMING LANGUAGE METHOD AND SYSTEM FOR EXTENDING APIS TO EXECUTE IN CONJUNCTION WITH DATABASE APIS,” by Craig Weissman, filed Oct. 4, 2006, which is incorporated in its entirety herein for all purposes. Invocations to applications may be detected by one ore more system processes, which manage retrieving application metadata  516  for the subscriber making the invocation and executing the metadata as an application in a virtual machine. 
     Each application server  500  may be communicably coupled to database systems, e.g., having access to system data  425  and tenant data  423 , via a different network connection. For example, one application server  500   1  might be couple via the network  414  (e.g., the Internet), another application server  500   N-1  might be coupled via a direct network link, and another application server  500   N  might be coupled by yet a different network connection. Transfer Control Protocol and Internet Protocol (TCP/IP) are typical protocols for communicating between application servers  500  and the database system. However, it will be apparent to one skilled in the art that other transport protocols may be used to optimize the system depending on the network interconnect used. 
     In certain embodiments, each application server  500  is configured to handle requests for any user associated with any organization that is a tenant. Because it is desirable to be able to add and remove application servers from the server pool at any time for any reason, there is preferably no server affinity for a user and/or organization to a specific application server  500 . In one embodiment, therefore, an interface system implementing a load balancing function (e.g., an F5 Big-IP load balancer) is communicably coupled between the application servers  500  and the user systems  412  to distribute requests to the application servers  500 . In one embodiment, the load balancer uses a least connections algorithm to route user requests to the application servers  500 . Other examples of load balancing algorithms, such as round robin and observed response time, also can be used. For example, in certain embodiments, three consecutive requests from the same user could hit three different application servers  500 , and three requests from different users could hit the same application server  500 . in this manner, system  416  is multi-tenant, wherein system  416  handles storage of, and access to. different objects, data and applications across disparate users and organizations. 
     As an example of storage, one tenant might be a company that employs a sales force where each salesperson uses system  416  to manage their sales process. Thus, a user might maintain contact data, leads data, customer follow-up data, performance data, goals and progress data, etc., all applicable to that user&#39;s personal sales process (e.g., in tenant data storage  422 ). In an example of a MTS arrangement, since all of the data and the applications to access, view, modify, report, transmit, calculate, etc., can be maintained and accessed by a user system having nothing more than network access, the user can manage his or her sales efforts and cycles from any of many different user systems. For example, if a salesperson is visiting a customer and the customer has Internet access in their lobby, the sales person can obtain critical updates as to that customer while waiting for the customer to arrive in the lobby. 
     While each user&#39;s data might be separate from other users&#39; data regardless of the employers of each user, some data might be organization-wide data shared or accessible by a plurality of users or all of the users for a given organization that is a tenant. Thus, there might be some data structures managed by system  416  that are allocated at the tenant level while other data structures might be managed at the user level. Because an MTS might support multiple tenants including possible competitors, the MTS should have security protocols that keep data, applications, and application use separate. Also, because many tenants may opt for access to an MTS rather that maintain their own system, redundancy, up-time, and backup are additional functions that may be implemented in the MTS. In addition to user-specific data and tenant-specific data, system  416  might also maintain system level data usable by multiple tenants or other data. Such system level data might include industry reports, news, postings, and the like that are sharable among tenants. 
     In certain embodiments, user systems  412  (which may be client systems) communicate with application servers  500  to request and update system-level and tenant-level data form system  416  that may require sending ore or more queries to tenant data storage  422  and/or system data storage  424 . System  416  (e.g., an application server  500  in system  416 ) automatically generates one or more SQL statements (e.g., one or more SQL queries) that are designed to access the desired information. System data storage  424  may generate query plans to access the requested data from the database. 
     Each database can generally be viewed as a collection of objects, such as a set of logical tables, containing data fitted into predefined categories. A “table” is one representation of a data object, and may be used herein to simplify the conceptual description of objects and custom objects according to the present invention. It should be understood that “table” and “object” may be used interchangeably herein. Each table generally contains one or more data categories logically arranged as columns or fields in a viewable schema. Each row or record of a table contains an instance of data for each category defined by the fields. For example, a CRM database may include a table that describes a customer with fields for basic contact information such as name, address, phone number, fax number, etc. Another table might describe a purchase order, including fields for information such as customer, product, sale price, date, etc. In some multi-tenant database systems, standard entity tables might be provided for use by all tenants. For CRM database applications, such standard entities might include tables for Account, Contact, Lead, and Opportunity data, each containing pre-defined fields. It should be understood that the word “entity” may also be used interchangeably herein with “object” and “table”. 
     In some multi-tenant database systems, tenants may be allowed to create and store custom objects, or they may be allowed to customize standard entities or objects, for example by creating custom fields for standard objects, including custom index fields. U.S. patent application Ser. No. 10/817,161, filed Apr. 2, 2004, entitled “CUSTOM ENTITIES AND FIELDS IN A MULTI-TENANT DATABASE SYSTEM,” which is hereby incorporated herein by reference, teaches systems and methods for creating custom objects as well as customizing standard objects in a multi-tenant database system. In certain embodiments, for example, all custom entity data rows are stored in a single multi-tenant physical table, which may contain multiple logical tables per organization. It is transparent to customers that their multiple “tables” are in fact stored in one large table or that their data may be stored in the same table as the data of other customers. 
     It should be noted that nay of the different embodiments described herein may or may not be equipped with any one or more of the features set forth in one or more of the following published applications: US2003/023404, titled “OFFLINE SIMULATION OF ONLINE SESSION BETWEEN CLIENT AND SERVER,” FILED Nov. 4, 2002; US2004/0210909, titled “JAVA OBJECT CACHE SERVER FOR DATABASES,” filed Apr. 17, 2003, now issued U.S. Pat. No. 7,209,929; US2005/0065925, titled “QUERY OPTIMIZATION IN A MULTI-TENANT DATABASE SYSTEM” filed Sep. 23, 2003; US2005/0223022, titled “CUSTOM ENTITIES AND FIELDS IN A MULTI-TENANT DATABASE SYSTEM,” filed Apr. 2, 2004; US2005/0283478, titled “SOAP-BASED WEB SERVICES IN A MULTI-TENANT DATABASE SYSTEM,” filed Jun. 16, 2004; and/or US2006/0206834, titled “SYSTEMS AND METHODS FOR IMPLEMENTING MULTI-APPLICATION TABS AND TAB SETS,” filed Mar. 8, 2005; which are each incorporated herein by reference in their entirety for all purposes. 
     While the invention has been described by way of example and it terms of the specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. to the contrary, it is intended to cover various modifications and similar arrangements as would be apparent to those skilled in the art. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.