Each WhereScape RED Callable Routine exists in the database as either a Stored Procedure or a User-defined Function that can be invoked from SQL. A Callable Procedure is invoked by a SQL call/execute statement and a Callable Function is invoked in a SQL SELECT statement or a value expression. The Callable Routines are typically implemented as procedures in most database systems due to RDBMS limitations of userdefined functions, when the WhereScape RED API was originally developed.
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