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1.1.2 Alpha
Alpha fields are used to store character type data up to a maximum of 256 characters in length.
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Please review the general 1.1.1 Field Type Considerations.
Field Definition Rules
Rules for defining an Alpha field in the repository are:
Length | Must be 1 to 256 in length. No decimals. |
|---|---|
Valid Keyboard Shift | Blanks, X, A, N, I, D, M, O, E, J, or W. |
Allowed Attributes | Null values are not allowed. |
Edit Mask | Not allowed. |
Default | Spaces. |
Usage Rules
Partition Type | RDML and RDMLX Partitions. |
|---|---|
Files | RDML and RDMLX Files. Alpha fields may be used as real fields or keys. |
Logical Views | Alpha fields may be used as keys to logical views. |
Virtual Fields | Alpha fields may be used with Substring, Concatenation or Date Virtual Fields. |
Predetermined Join Fields | Alphas may be used for lookup predetermined joined fields. |
Built-In Functions | When used in Built-In Functions, Alpha fields are valid for arguments of type 'A'. |
Conversion | Refer to Field Type Conversions. |
Platform Considerations
- Refer to Platform Considerations in 1.1.1 Field Type Considerations.
Also See
1.1.3 String
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