Database Tuning (MOSC)

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Need help investigating full table scan

edited Mar 13, 2012 8:05AM in Database Tuning (MOSC) 18 comments
This past weekend i was updating a DB with some new product data.  The process to import the new data(using 3rd party application) typically takes 30min-2hrs depending on the amount\kind of data being imported.  Yesterday,  I encountered a full table scan during the import that ran for 6 hours before I terminated the update.  I am looking for information/ideas on how to correct this issue.  What I know so far:

Problem SQL statement: SELECT DISTINCT RA_LIB_ID,CODE FROM RA_ATTRIBUTES WHERE RA_LIB_ID = :1

The RA_ATTRIBUTES table:
Size - 500mb
# of columns - 10
Row Count – 3017638

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