On Wed, May 31, 2017 at 10:49 PM, Dilip Kumar <dilipbal...@gmail.com> wrote:
> On Wed, May 31, 2017 at 2:20 PM, Michael Paquier
> <michael.paqu...@gmail.com> wrote:
>> Yeah, see 0e0f43d6 for example. A simple fix is to look at
>> IsUnderPostmaster when creating, altering or dropping a subscription
>> in subscriptioncmds.c.
> Yeah, below patch fixes that.

Thanks, this looks correct to me at quick glance.

+    if (!IsUnderPostmaster)
+        ereport(FATAL,
+                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+            errmsg("subscription commands are not supported by
single-user servers")));
The messages could be more detailed, like directly the operation of
CREATE/ALTER/DROP SUBCRIPTION in each error message. But that's a nit.

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