[SQL] Btree index on varchar

[Alexaki Sofia]

Hello,

I have a question for Btree indexes on a varchar field.
Does postgres (7.0.2) uses a special encoding when creating
Btree indexes on varchar??

Is it much more efficient to create indexes  on integer than
on strings with average length 30 chars??

Thank you in advance for your help

Regards
Sofia Alexaki


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