SQL( "if ...exists...),how to do it in the PostgreSQL? - Mailing list pgsql-hackers

From Eric
Subject SQL( "if ...exists...),how to do it in the PostgreSQL?
Date
Msg-id 3B15D9D1.21199@mta3
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Responses Re: SQL( "if ...exists...),how to do it in the PostgreSQL?
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��    I can realize this function in the SYBase,but How can i do it in the PostgreSQL? 
/****SQL***/
if not exists(select id from test) insert into test(id) values (280);
/*********/ 

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