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Features that Require the CBO

原创 Linux操作系统 作者:victor1010 时间:2009-09-14 13:29:04 0 删除 编辑


The following features require use of the CBO

Partitioned tables and indexes
n Index-organized tables
n Reverse key indexes
n Function-based indexes
n SAMPLE clauses in a SELECT statement
n Parallel query and parallel DML
n Star transformations and star joins
n Extensible optimizer
n Query rewrite with materialized views
n Enterprise Manager progress meter
n Hash joins
n Bitmap indexes and bitmap join indexes
n Index skip scans


    Note: Using any of these features enables the CBO, even if the
parameter OPTIMIZER_MODE is set to RULE.

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