DataClass

Syntax Element: column

Description

A special stereotype that can cause code generation activities.

Example

database HasATable
{
  types
    int as integer, 
    varstring ("nvarchar") as string,
    number ("numeric") as real;
  stereotype table with validation = minimal;
  
  version 1.0 : initialized
  {
    design
    {
      protected table X
      {
        public column A with DataType = type(int);
        public column B with DataType = type(varstring(5));
        public column C with DataType = type(number(5,2));
      }
    }
  }
}

Notes

• When validation is turned on, this can be used as the basis for designing a column in a result set.
• When minimal validation is turned on, there must be at least a DataType attribute.

Related Use Cases

• Specifying design separately from construction
• Getting compiler feedback on your database design
• Eliminating duplication between client and database code
• Deriving creation scripts from design
• Keeping clients coupled to the current version
• Leveraging a version's proxy in a client
• Transition testing

Other Actions

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