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2. Surrogate Key Generation In Informatica 2017
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Key Generator Transformation Overview Soundex Strategy String Strategy NYSIIS Strategy Key Generator Output Ports Configuring a Grouping Strategy Key Creation Properties Key Generator Transformation Advanced Properties. Updated May 31, 2019. Download this guide. Explore Informatica Network Communities. Knowledge Base. Success Portal More at. Feb 21, 2013  Example: If EMPNO is the key, we can keep only one record in target for the same Employee number and can’t maintain history, so we use Surrogate key as Primary key and not EMPNO. Informatica Sequence Generator: Passive and Connected Transformation; The Sequence Generator transformation generates numeric values; Use the Sequence Generator to create unique primary key values, replace missing primary keys. Nov 28, 2005 A surrogate key is any column or set of columns that can be declared as the primary key instead of a 'real' or natural key. Sometimes there can be several natural keys that could be declared as the primary key, and these are all called candidate keys. So a surrogate is a candidate key. Oct 30, 2019  Informatica Smart Executor would validate the mapping on different parameters to choose a particular engine for execution. For more information, refer to KB 526149. However, when the mapping is already running in non-Spark mode ('Blaze'/'Hive'), perform the following steps to. 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.

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The file has 4 functional keys, say fk1, fk2, fk3, fk4. Using these we have to create a surrogate key. Condition for surrogate key generation - 1. If all of fk1, fk2, or fk3 is NOT NULL, then create key using fk1, fk2, and fk3. And if any of the fk1, fk2, fk3 is NULL use fk4 to generate the key. If a natural key is recommended, use a surrogate key field as the primary key, and a natural key as a foreign key. While users may interact with the natural key, the database can still have surrogate keys outside of the users’ view, with no interruption to user experience.

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Use the surrogate key transformation to add an incrementing key value to each row of data. This is useful when designing dimension tables in a star schema analytical data model. In a star schema, each member in your dimension tables requires a unique key that is a non-business key.

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Configuration

Key column: The name of the generated surrogate key column.

Why do so few wallets allow the import of private keys? I recently had to transfer coins out of an old paper wallet and it was shockingly difficult. I started with blockchain.info, but their new wallet won't let you import private keys. Why can't private keys for certain wallets be generated. Fact is, it is possible to create a non-deterministic wallet where the 2 private keys (private spend and private view) are generated independently. In such case, to restore that kind of wallet, you need to have both of them, as the view key can't be derived from the spend key. Note that with BIP32 and BIP44, private keys can be generated deterministically from a master key or a seed, in which case these new private keys do not necessary need to be saved - they can just be regenerated from the seed or master whenever needed.

Start value: The lowest key value that will be generated.

Increment keys from existing sources

To start your sequence from a value that exists in a source, use a derived column transformation following your surrogate key transformation to add the two values together:

Increment from existing maximum value

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To seed the key value with the previous max, there are two techniques that you can use based on where your source data is.

Database sources

Use a SQL query option to select MAX() from your source. For example, Select MAX(<surrogateKeyName>) as maxval from <sourceTable>/

Surrogate Key Generation In Informatica 2017

File sources

If your previous max value is in a file, use the max() function in the aggregate transformation to get the previous max value:

In both cases, you must join your incoming new data together with your source that contains the previous max value.

Surrogate Key Generation In Informatica 2016

Data flow script

Syntax

Example

The data flow script for the above surrogate key configuration is in the code snippet below.

Next steps

Surrogate Key Generation In Informatica History

These examples use the Join and Derived Column transformations.