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Extending Informix®Beyond standard relational database objects, HCL Informix® can be extended to handle specialized data types, access methods, routines, and other objects. Informix® includes many built-in extensions that are fully integrated in the database server. Informix® also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for Informix®.
Creating extensionsYou can create user-defined data types, routines, access methods, and other database objects to suit your needs. You can use application programming interfaces to write user-defined routines and applications that access data in Informix® databases.
R-Tree Index User's GuideThe Informix® R-Tree Index User's Guide describes the HCL Informix® R-tree secondary access method and how to access and use its components.
Manage databases that use the R-tree secondary access method
R-tree index and logging
Description of the R-tree-specific logical-log records
Logical-log records of deletions of items from a leaf page

Logical-log records of deletions of items from a leaf page

The format of the seventh column of the logical-log record of a deletion from an R-tree leaf page is as follows:

LEAFDEL [page number, base table rowid, base table fragid, delete flag]

The following example shows an actual log record of this type displayed with the onlog utility:

288 192  RTREE    8        0  1c4      LEAFDEL  [39,258,1048960,0]   0

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