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alexzeng.wordpress.com | ||
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jonathanlewis.wordpress.com
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| | | | | A recent thread on the OTN database forum asks the question: "... since redo also has past and current information why can't redo logs be used to retrieve that information? Why is undo required when redo already has all that information." The thread has generated some interesting replies - but to a large extent they... | |
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tonyhasler.wordpress.com
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| | | | | When a table is accessed by multiple members of a parallel query server set, the execution plan may show the use of block range granules (PX BLOCK ITERATOR) or partition granules (PX PARTITION [RANGE|LIST|HASH] ITERATOR or PX PARTITION [RANGE|LIST|HASH] ALL). The basic ideas surrounding these concepts are discussed in numerous blogs and books, including my... | |
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oracle-randolf.blogspot.com
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| | | | | Starting with version 12c Oracle obviously has introduced another parallel distribution method for direct path loads (applicable to INSERT A... | |
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jonathanlewis.wordpress.com
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| | | I have mentioned transitive closure in the past, and the commentson this blog item go into some depth about some of the effects of transitive closure. However, arecent incoming link has prompted me to point out a couple of further details about the appearance (or non-appearance) of transitive closure. We start with three (virtually) identical... | ||
