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- .sh 1 "CONCLUSION" 6
- .pp
- It will be interesting to run further tests on the optimizer once
- it has been fully integrated with the rest of POSTGRES.
- Among the issues of interest are:
- .ip "\(bu"
- whether writing the optimizer in LISP is a performance concern
- .ip "\(bu"
- whether the optimizer \fIactually\fR selects true optimal plans
- .ip "\(bu"
- whether the optimizer really works with \fIall\fR user-defined types, operators,
- and access methods
- .ip "\(bu"
- whether the current algorithm for optimizing nested-attribute queries is
- \*(lqgood enough.\*(rq
- .lp
- .pp
- Clearly, further validation of the POSTGRES optimizer is necessary to
- examine the more subtle issues raised by these questions.
- However, the preliminary work described in this report has at least
- illustrated the feasibility of many important ideas.
- Most significant of these are the concepts introduced to support
- optimization of extendibile objects in a database system.
-