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'Meta-SQL' Use (with reference to PeopleSoft)

Meta-SQL expands to platform-specific SQL substrings, causes another function to be called, or substitutes a value. Meta-SQL constructs are used in functions that pass SQL strings, such as the following:

  • SQLExec.
  • Scroll buffer functions (ScrollSelect and its relatives).
  • PeopleSoft Application Designer dynamic and SQL views.
  • Some Rowset class methods (Select, SelectNew, Fill, and so on.).
  • The SQL class.
  • PeopleSoft Application Engine programs.
  • Some Record class methods (Insert, Update, and so on.).
    • COBOL functions.

Meta-SQL Element

Types There are three types of meta-SQL elements:

  • Construct

Constructs are a direct substitution of a value, and help to build or modify a SQL statement. Examples include %Bind, %InsertSelect, and %List.

  • Function

Functions perform actions or cause another function to be called. Examples include %ClearCursor, %Execute, and %ExecuteEdits.

  • Meta-variable.

Meta-variables enable substitution of text within SQL statements. Examples incldue %AsOfDate, %Comma, and %JobInstance.

Meta-SQL Placement Considerations: Not all meta-SQL can be used by all programs. Some meta-SQL can be used only in Application Engine programs. Other meta-SQL can only be used as part of a SQL statement in a SQL or dynamic view. The following table lists available meta-SQL elements and where each element can be used.

If a meta-SQL construct, function, or meta-variable is supported in PeopleCode, it is supported in all types of PeopleCode programs; that is, in Application Engine PeopleCode programs (actions), component interface PeopleCode programs, and so on.

Note. Even if a meta-SQL element is used in PeopleCode, you cannot use meta-SQL like a built-in function. You can use meta-SQL in the SQLExec function, the Select method, the Fill method, and so on. Note. Meta-SQL is not available in SQR

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