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Size of empty varchar and size of index - Mailing list pgsql-performance

From Achim Luber
Subject Size of empty varchar and size of index
Date
Msg-id 42DF72AA.3090207@4soft.de
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List pgsql-performance
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Hello,
I'm searching for two facts:
How much space takes a varchar column if there is no value in it (NULL)?
How much space needs a index of an integer column?
Hope I post to the right list and hope anybody can help me.
Thank you
Greetings
Achim

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