Test is_data_type

From: "Mihai Gheorghiu" <tanethq(at)earthlink(dot)net>
To: <pgsql-general(at)postgresql(dot)org>
Subject: Test is_data_type
Date: 2001-09-27 18:23:26
Message-ID: 000301c14786$e15ddfa0$6e646464@New6.Travel
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How can I test that a text variable has a value that represents a valid data
type, other than writing something like: variable IN ('integer', 'text',
'float'...)?

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