Oracle – Functions in where clause and Performance Issues.

Using Functions in Where clause cause performance issues.

Option 1: Use data conversions in upper layer, before sending data for comparison in where clause.

Option 2:  Use Function based indexes.

For more information read….

http://www.oraclebrains.com/2006/12/understanding-function-based-indexes/

http://www.dba-oracle.com/oracle_news/2004_1_19_using_function_based_indexes%20.htm

http://www.dba-oracle.com/art_9i_indexing.htm

-o-

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