Re: How to force Postgres to calculate MAX(boolean)

Andrus wrote:

>I try to convert code from other database to Postgres.
>
>CREATE TABLE test(test BOOLEAN);
>SELECT MAX(test) FROM test;
>
>causes error
>
>ERROR: function max(boolean) does not exist
>HINT: No function matches the given name and argument types. You may need
>to add explicit type casts.
>
>I tried
>SELECT MAX(test:integer)::boolean FROM test;
>
>but this casuses error
>
>ERROR: cannot cast type boolean to integer
>
>I have lot of MAX() functions applied to boolean expressions.
>
>How to force Postgres to calculate MAX(boolean) ?
>MAX(boolean) should return true if its argument evaluates true for at least
>one row.
>
>
Use bool_or(boolean) instead.
Bye