Re: psql --single-step mode doesn't like empty sets

Dan Langille writes:

> As part of a 7.1.2->7.2 data migration process, I resorted to single stop
> mode to see if I could determine the cause of an error (please see my
> following post to this list).
>
> $ less users.txt
>
> COPY "users" FROM stdin;
> \.
> --
> -- TOC Entry ID 71 (OID 604886)
> --
> -- Name: "element_name" Type: INDEX Owner: dan
> --
>
> $ psql --single-step fp2migration < users.txt
> ***(Single step mode: Verify
> query)*********************************************
> COPY "users" FROM stdin;
> ***(press return to proceed or enter x and return to
> cancel)********************
> ERROR: copy: line 1, CopyFrom: Fail to add null value in not null
> attribute name
> lost synchronization with server, resetting connection

If you're reading the file from stdin, then the confirmation for the
single-step mode will also be read from the file. What you want to do
instead is

psql --single-step -f users.txt fp2migration

--
Peter Eisentraut peter_e(at)gmx(dot)net