Re: How is it done?

This WebDNA talk-list message is from

1998


It keeps the original formatting.
numero = 17440
interpreted = N
texte = >When a search includes several different values to be checked in a single >database field, how is the search performed? > >Is the database traversed once from top to botton for each value (thus >moving from top to bottom several times), or is each record checked for >all the values before moving to the next record (thus traversing the db >from top to bottom just once)?The internals of how a search is performed are private and even changed from release to release in favor of better/faster algorithms. Right now it is probably visiting each record once before moving on, although sorting can visit records in an apparently random pattern. Is there some noticeable side-effect you are seeing?Technical Support | ==== eCommerce and Beyond ==== Pacific Coast Software | WebCatalog, WebMerchant, 11770 Bernardo Plaza Court | SiteEdit Pro, PhotoMaster, San Diego, CA 92128 | Typhoon 619/675-1106 Fax: 619/675-0372 | http://www.smithmicro.com/ Associated Messages, from the most recent to the oldest:

    
  1. Re: How is it done? (Kenneth Grome 1998)
  2. Re: How is it done? (PCS Technical Support 1998)
  3. Re: How is it done? (PCS Technical Support 1998)
  4. Re: How is it done? (Trevor Crist 1998)
  5. Re: How is it done? (Kenneth Grome 1998)
  6. Re: How is it done? (Kenneth Grome 1998)
  7. Re: How is it done? (PCS Technical Support 1998)
  8. Re: How is it done? (Kenneth Grome 1998)
  9. Re: How is it done? (PCS Technical Support 1998)
  10. How is it done? (Kenneth Grome 1998)
>When a search includes several different values to be checked in a single >database field, how is the search performed? > >Is the database traversed once from top to botton for each value (thus >moving from top to bottom several times), or is each record checked for >all the values before moving to the next record (thus traversing the db >from top to bottom just once)?The internals of how a search is performed are private and even changed from release to release in favor of better/faster algorithms. Right now it is probably visiting each record once before moving on, although sorting can visit records in an apparently random pattern. Is there some noticeable side-effect you are seeing?Technical Support | ==== eCommerce and Beyond ==== Pacific Coast Software | WebCatalog, WebMerchant, 11770 Bernardo Plaza Court | SiteEdit Pro, PhotoMaster, San Diego, CA 92128 | Typhoon 619/675-1106 Fax: 619/675-0372 | http://www.smithmicro.com/ PCS Technical Support

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