Since VARCHAR length is run length encoded
and CHAR is fixed length
If your string will always be about the same size set as CHAR(MaximumLength)
otherwise use VARCHAR
M
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----- Original Message -----
From: "Crystal" <support@xxxxxxxxxxxxxxxxxxx>
To: <pgsql-general@xxxxxxxxxxxxxx>
Sent: Sunday, July 08, 2007 7:15 PM
Subject: [GENERAL] The speed problem of Varchar vs. Char
Hi All,
Our company need to save contact details into the PostgreSQL database. I
just begin to learn it, so I got many questions. I am not sure which data
type I should choose for website address, varchar or char. The website
address may be very long, and we also don't want to lose the speed. Thus,
the question is: if we have a large contact database, how much slowdown or
speed up will be expected if we choose variable length rather than fixed
length? Thanks forward.
Best Wishes,
Crystal
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