While googling I found a fresh article from Oracle for the VLDB journal: Enhanced Subquery Optimization in Oracle. It primarily discusses subqueries – how Oracle deals with them on optimization and at run-time. Paper’s topics overview: subquery coalescing – here I’ve done some testing of the feature partially available in 11gR2 (parallel) group-by pushdown – [...]
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Enhanced Subquery Optimizations in Oracle
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