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Re: Why is cast array integer[] <--> text[] is not immutable. - Mailing list pgsql-general

From Tom Lane
Subject Re: Why is cast array integer[] <--> text[] is not immutable.
Date
Msg-id 27130.1323443398@sss.pgh.pa.us
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In response to Why is cast array integer[] <--> text[] is not immutable.  (Phil Couling <couling@gmail.com>)
Responses Re: Why is cast array integer[] <--> text[] is not immutable.
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Phil Couling <couling@gmail.com> writes:
> I'm struggling to understand why this casts is not immutable:

> integer[]::text[]
> text[]::integer[]

Because it's implemented via array_out/array_in rather than any more
direct method, and those are marked stable because they potentially
invoke non-immutable element I/O functions.

            regards, tom lane

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