PPT Slide

Row Types

• To define and use a "row type", a user will
  • Create the desired structured type using SQL3 DDL
    • Columns, plus (optional) specification of a supertype
  • Create functions/methods involving the type
    • Arguments of the new type, w/overloading in the case of methods
  • Create one or more tables of the indicated type
    • Type hierarchy (if any) yields corresponding table hierarchies

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