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• LANSA extended definitions.
• RPG or C program coded definitions.

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RPG or C coded definitions (refer to  Virtual Column Derivation in the Technical Reference Guide) may be necessary for complex actions such as:

• type Type and length conversions.
• date Date to age conversions.
• dynamic Dynamic data conversion.

LANSA trigger functions may also be used to create virtual columns. Trigger functions use RDML and provide an alternate option to using RPG or C for coding the virtual column logic.

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Virtual columns are not part of the real table and cannot be directly used outside of LANSA. Virtual columns are made possible using LANSA's Object Access Module. Client applications using LANSA Open and any applications which use the LANSA Object Access Module can access the LANSA virtual columns.

See Also

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Distinction between real and virtual columns

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