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    Chapter 34. Sequences

    Persistent Sequences
    Non Persistent Sequences
    Internal Sequences
    Creating Internal Sequences
    Externalizing Internal Sequences
    Exporting Internal Sequences
    External (Shared) Sequences
    Creating External (Shared) Sequences
    Linking External (Shared) Sequences
    Internalizing External (Shared) Sequences
    Editing a Sequence
    Sequences in Cluster Environment

    Sequence is an object designed to create a sequence of numbers.

    Sequence can be used, for example, for numbering records or generating a unique identifier for records being stored in a database.

    The generated numbers can be unique within a single graph run (non persistent sequence) or across multiple graph runs (persistent sequence).

    The sequence can be created as internal (accessible from single graph) or external (shared among graphs). A conversion between internal and external sequences is possible.

    Editing a sequence in Sequence Dialog is described in Editing a Sequence.

    Sequences can be accessed from CTL, see Sequence Functions.

    [Warning]Warning

    Remember that you should not use sequences in the init(), preExecute() or postExecute() functions of CTL template and the same methods of Java interfaces.

    If you plan to use sequences on Cluster, see Sequences in Cluster Environment.