Database Tuning (MOSC)

MOSC Banner

Fake (virtual) indexes

edited Dec 4, 2009 2:41AM in Database Tuning (MOSC) 9 commentsAnswered
My users are having a problem with queries taking a long time to run.

I have a query using 2 date fields (datefield1, datefield2). The 2 date fields come from 2 different tables. There is an index on datefield1 created by the DBAs.  When a query is run using both datefield1 and datefield2 it takes a long time to complete. If I take out datefield1 and only query using datefield2 the query comes back rather quickly. Datefield1 also has a fake index (X_INDX). I checked to see if this "fake" index is being used and from what I can tell it's not.

Howdy, Stranger!

Log In

To view full details, sign in to My Oracle Support Community.

Register

Don't have a My Oracle Support Community account? Click here to get started.

Category Leaderboard

Top contributors this month

Instructions for posting

×

1. Select a discussion category from the picklist.


2. Enter a title that clearly identifies the subject of your question.


3. In the body, insert detailed information, including Oracle product and version.


Please abide by the Oracle Community guidelines and refrain from posting any customer or personally identifiable information (PI/CI).


Cloud / Fusion customers - Our Cloud community has moved! Please go to Cloud Customer Connect .


New to My Oracle Support Community? Visit our Welcome Center

MOSC Help Center