You can use the Surrogate Key Generator stage to update a state file, but not a database sequence. Sequences must be modified with database tools. If you are using a state file on an NSF mounted file system, then the mount point where the state file is located needs to be mounted with the lock karacto.xyzg: bankruptcy. Surrogate Key is a Primary Key for a dimensional table. (Surrogate key is alternate to Primary Key) The most importance of using Surrogate key is not affected by the changes going on with a database. And in Surrogate Key Duplicates are allowed, where it cant be happened in the Primary karacto.xyzg: bankruptcy. Aug 19, · Update a state file with a range of key values. Generate surrogate key columns and pass them to the next stage in the job. View the contents of the state file. What is State File? State File is a internal format file which is used for key management, it can keep track of previous values all by itself. It retrieve the last key used, generating Missing: bankruptcy.
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Post a Comment. It is alternative to natural key. And in natural key, it may have alphanumeric composite key but the surrogate is always single numeric key. Surrogate key is used to generate key columns, for which characteristics can be specified. The surrogate key generates sequential incremental and unique integers for a provided start point. It can have a single input and a single output link. The Surrogate Key Generator stage is a processing stage that generates surrogate key columns and maintains the key source.
A surrogate key is a unique primary key that is not derived from the data that it represents, therefore changes to the data will not change the primary key. In a star schema database, surrogate keys are used to join a fact table to a dimension table.
Generated keys are 64 bit integers and the key source can be stat file or database sequence. Creating the key source. Drag the surrogate key stage from palette to parallel job canvas with no input and output links. Double click on the surrogate key stage and click on properties tab. You can use the Surrogate Key Generator stage to update a state file, but not a database sequence. Sequences must be modified with database tools.
What is State File - State File is a internal format file which is used for key management, it can keep track of previous values all by itself. It retrieve the last key used, generating new keys and writing the last key used back to the state file. By Unknown at Labels: create , DataSet , DataStage , design , Designer , develop , file , generator , Job , keys , State , surrogate , surrogate key generator.
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