PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> when generated column expression length is larger then some value - the rest
> of expression is cut in \d[+] output:
Yeah, this is an intentional and very ancient behavior:
appendPQExpBufferStr(&buf,
",\n (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid, true) for 128)"
"\n FROM pg_catalog.pg_attrdef d"
Maybe we should decide that completeness is more important than keeping
the line to some arbitrary width. But it's operating as designed.
regards, tom lane