Slow Query Against Dictionary View, Such as DBA_ALL_TABLES
(Doc ID 2696268.1)
Last updated on OCTOBER 08, 2020
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 and later
Information in this document applies to any platform.
A simple query against a data-dictionary view is taking minutes to complete.
Examination of SQL trace data indicates that high I/O occurs at this line of the execution plan:
INDEX SKIP SCAN I_COL1
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