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Descending Bug
This is another example of defects in the code to handle descending columns in indexes, with the added feature that the problem is addressed somewhere between 19.4 and 19.10 (it’s present in 19.3,...
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Some years ago I wrote a note describing how, with a query using identical literal values in the predicate, the optimizer was able to produce exactly the same plan body with exactly the same Predicate...
View ArticleConsistent?
Here’s a cut-n-paste from a simple SQL*Plus session running under 19.11.0.0 (23.4 produces the same effects): SQL> drop table t purge; Table dropped. SQL> create table t (id number, val number)...
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