Re: create table like: ACCESS METHOD - Mailing list pgsql-hackers

On 27.08.21 12:37, Vik Fearing wrote:
> It seems like this should error to me:
> 
> CREATE ACCESS METHOD heapdup TYPE TABLE HANDLER heap_tableam_handler;
> CREATE TABLE likeam1() USING heap;
> CREATE TABLE likeam2() USING heapdup;
> CREATE TABLE likeamlike(
>      LIKE likeam1 INCLUDING ACCESS METHOD,
>      LIKE likeam2 INCLUDING ACCESS METHOD
> );
> 
> At the very least, the documentation should say that the last one wins.

Hmm.  The problem is that the LIKE clause is really a macro that expands 
to the column definitions of the other table.  So there is, so far, no 
such as thing as two LIKE clauses contradicting.  Whereas the access 
method is a table property.  So I don't think this syntax is the right 
approach for this feature.

You might think about something like

CREATE TABLE t2 (...) USING (LIKE t1);

At least in terms of how the syntax should be structured.