To enable this, the governor Allow usage of local cache should be enabled at the framework. The same applies to filters and calculations; avoid adding these to database layer query subjects. Wednesday, April 02,
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Best Practices in Modeling IBM Cognos 10.2 Semantic Layers in Framework Manager
Male Female Please select your gender. The creation of multiple alias shortcuts on a table that use different relationships will handle these ambiguous relationships graciously.
When retrieving 2 measures from two different fact tables using a different granularity, Cognos can determine the correct aggregation when determinants are specified. Presentation Layer The sole purpose of the presentation layer is to make it easy for users to find the information they need. This package can support 2 query modes: These scope relations are only logical, the underlying query subject joins remain in use.
All end-user based tools are accessed from Cognos Connection. Although it is possible to import data from different data sources, the reflection should be made that there is a performance penalty in doing this. In the Data Foundation view some other tasks need to be done. Instead at every user request, a query is executed. Please enter a pincode or area name. Following are the considerations to take while defining cardinality: The satellite tables represent the set of dimensions that can be used to look at the measures from different angles.
Doing so will enable you to see what database columns are in a report when debugging the report. If necessary, they should be exposed as a separate model query subject that looks like a dimension. Conformed dimensions are dimensions used by multiple fact tables.
Recursive relationship should be converted to fixed cognoss using shortcuts. Also keep the original database column name in the design language in the Data Foundation View and Consolidation View.
Stitch Queries occur when a model has multiple one to many relationships usually as a result of data coming from multiple fact tables which can only be joined through a conformed dimension. For every star schema a different namespace is created, showing the end user functional business areas of which to select elements in the query.
Cognos 10 Tips: Best Practices for Cognos Framework Manager Development
I am a Student. Extra time spent during development ensuring these are correct can pay off tenfold in report run times later! Its recommended to create a view that caters to a group of reports, which makes the reporting easier to maintain.
A framework uses a number of objects to create a structured model. Q uery subjects are linked together using Relationships. These types of databases are modeled relationally and are highly normalized.
Only the objects that will be reported on by users should be published in a package. When importing from a pravtices data source, cardinality is detected based on a set of rules.
Best Practices in Modeling IBM Cognos Semantic Layers in Framework Manager | element61
All users connect to the Cognos BI server using a zero footprint web portal: Start by organising framewogk items taken from the database layer of your model into logical query subjects; it is perfectly acceptable and normal practice to combine elements from multiple tables into single logical query subject.
Modeling a metadata layer requires an extensive business and hest data source knowledge. The second is used in multi-dimensional analysis and resembles an OLAP cube.