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how to create function based index for TO_CHAR

793663Sep 13 2010 — edited Sep 13 2010
i need to create a function based index for the function to_char.when i tried ,i got an error,"only pure function can be indexed".what the error really means, help me in creating the index to reduce my query cost.
This post has been answered by 672680 on Sep 13 2010
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Locked on Oct 11 2010
Added on Sep 13 2010
#function, #index
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