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Analyzing an index after rebuild

Ian Abramson EXPERT RESPONSE FROM: Ian Abramson

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QUESTION POSED ON: 11 January 2008
I just rebuilt an index with 35 million rows in it. Do I have to analyze the index after rebuild?

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EXPERT RESPONSE
When you rebuild an index you have the option to compute statistics at the time of your command, so the basic answer is yes, you may need to compute statistics on the new index. With Oracle 10g and later versions, Oracle will compute indexes' statistics on rebuild and creation. However, if you want, you can always include the COMPUTE STATISTICS. It will not cause an error, but I would suggest you remove it from any 10g+ statements.


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