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    <p>Instead of the index you've created you need to create this one:</p> <pre><code>CREATE INDEX IDX_LISTINGMANAGER_ID ON listingmanager (trim(LOWER(listingmanagerid))); </code></pre> <p>The case is that functional index should be EXACTLY the same with the condition in the <code>WHERE</code> clause. </p> <p>Also you could use this trick in order to make your index work:</p> <pre><code>SELECT &lt;fields&gt; FROM ListingManager WHERE lower(LISTINGMANAGERID) like '%e.kkagacoe4aaae7rnr9lua5%' AND trim(lower(LISTINGMANAGERID)) = 'e.kkagacoe4aaae7rnr9lua5' </code></pre> <p>But it's pulled by it's ears. Also you should be awared that sometimes optimizer consider <code>FULL TABLE SCAN</code> as a more efficient way to retrieve data than to use an index, but I think not in your case (to make optimizer use an index, you should use <a href="http://docs.oracle.com/cd/E11882_01/server.112/e16638/hintsref.htm" rel="nofollow">hints</a>).</p> <p>For example, your query using hints:</p> <pre><code>SELECT /*+ INDEX (ListingManager IDX_LISTINGMANAGER_ID)*/ ListingManagerID, FirstName, LastName, PrimaryPhone, AlternatePhone, Email, UserName, Password, RecallGuid, CustomerSince, PWChangeRequired, PWExpireDate, CallingHours, CreateDate, CreateIPAddress, LastLogin, AutoRenewFlag, LastUpdated, UpdatedBy, AutoRenewRemovedDate, AutoRenewDate, isSupplier, PrefferedLanguage, AboutMe, PictureFilePath, IsProfilePictureDisplay, LocaleID, Address1, Address2, CityID, CountryID, StateProvinceID, PostalCode, RegistrationSource, PPCTypeID, GhostUser, ProfileId, TimezoneID, OCA FROM ListingManager WHERE trim(lower(LISTINGMANAGERID)) = 'e.kkagacoe4aaae7rnr9lua5' </code></pre>
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    1. COthank you so much...
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