what is statistics in vertica?? is it like a indexing in oracle?

RajzzRajzz
in General Discussion

what is statistics in vertica?? is it like a indexing in oracle? what is actually happen while i am doing analyze_statistics() ?

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  • eli_revacheli_revach
    Hi,
    Statistics in a given time include info about your data , the info is mainly about the data distibution per colum and the amount of distinct value each column has . this info is being used by the optimizer helping him to used the correct execution plan(with regard to performence) for your data/query + the relevant projectios . when you analyze statistics , vertica will sample your data and build / update the statistics .
  • RajzzRajzz

    That make sense. thanks

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