Function Based Index Usages On Foreign Key Column (Doc ID 2552176.1)

Last updated on JULY 20, 2024

Applies to:

Goal

Generally when we do some update on Parent table in FK relation , there is a implicit lock in child table to maintain the data consistency.
If there are index present in child table for the FK column, that index get used for the purpose.
But if no index is present, then it go for Full Table Scan.

If we have function based index instead of normal index ; will Oracle use the function based index or it will go for Full Table Scan ?
 

Solution

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