Restrictions for IMS Explorer

The following restrictions apply to running the IMS™ Explorer.

  • Verify that the DBD and PSB source files that you import into IMS Explorer are valid. Valid DBD and PSB source is source that the Database Description Generation (DBDGEN) utility or Program Specification Block (PSB) generation utility can process successfully.
  • IMS Explorer follows all references in DBDs to other DBDs when building its model, and it might require access to DBDs that are not referenced directly by PCBs in the PSB. For example, when IMS Explorer processes a PSB that references a logical DBD, IMS Explorer needs access to the primary DBDs that are referenced in the logical DBD. Similarly, all DBDs that are related by logical relationships must be accessible.

Restrictions for SQL access to an IMS database from IMS Explorer

  • For SQL access to an IMS database from IMS Explorer, the PCBs in the PSB for the database must be named. They can be named by using statement labels or by using the PCBNAME parameter.
  • If your application uses JDBC and the JDBC call includes fields from more than one segment in a hierarchical path, the IMS Universal JDBC driver uses path calls. To ensure that your application can retrieve fields from multiple segments, you must include P as a processing option (PROCOPT) in the PCB statement or SENSEG statement, as appropriate.
  • If your application uses the IMS Java™ hierarchical database interfaces (SSA database access) or the IMS Universal DL/I driver, path calls are under your control, and you must choose the appropriate PSB processing options.




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