RE: Time delayed LR (WAS Re: logical replication restrictions)

Dear Andres,

Thanks for reporting! I have analyzed the problem and found the root cause.

This feature seemed not to work on 32-bit OSes. This was because the calculation
of delay_time was wrong. The first argument of this should be TimestampTz datatype, not Datum:

```
+       /* Set apply delay */
+       delay_until = TimestampTzPlusMilliseconds(TimestampTzGetDatum(ts),
+                                                                                         MySubscription->applydelay);
```

In more detail, the datum representation of int64 contains the value itself
on 64-bit OSes, but it contains the pointer to the value on 32-bit.

After modifying the issue, this will work on 32-bit environments.

Best Regards,
Hayato Kuroda
FUJITSU LIMITED