Union & Nested queries - Mailing list pgsql-general

I tried to do the following query, but it doesn't work.

IFX=> select 1 IN (SELECT 1 UNION SELECT 2);
ERROR:  parser: parse error at or near "union"

Are there and syntax error? What is wrong about that??

Thanks

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Nelio Alves Pereira Filho
IFX Networks
Sao Paulo / Brazil