Re: [HACKERS] Cached plans and statement generalization

On Apr 25, 2017, at 1:37 PM, Konstantin Knizhnik <k.knizhnik@postgrespro.ru> wrote:

SELECT ‘hello’::CHAR(10) || ‘World’, 5 + 6;

You can substitute ‘hello’, ‘World’, 5, and 6. But not 10.

I am substituting only string literals. So the query above will be transformed to

SELECT $1::CHAR(10) || $2, 5 + 6;

What's wrong with it?