psql -c does not honor ON_ERROR_STOP

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This seems like either a psql bug or maybe just a documentation bug. I
know the psql docs say that -c behavior can be surprising, but I find
the below surprising even after reading the docs a couple of times.
Given that ON_ERROR_STOP defaults to off, it seems like these two
cases should both result in two rows inserted.

8<----------------------
SQL="begin; insert into foo values(1); commit; begin; insert into foo
values(1); commit; begin; insert into foo values(2); commit;"

psql test -c "drop table if exists foo"
psql test -c "create table foo(id int primary key)"

psql test -c "${SQL}"
ERROR: duplicate key value violates unique constraint "foo_pkey"
DETAIL: Key (id)=(1) already exists.
psql test -c "select * from foo"
id
- ----
1
(1 row)

psql test -c "truncate foo"
echo "${SQL}" | psql test
BEGIN
INSERT 0 1
COMMIT
BEGIN
ERROR: duplicate key value violates unique constraint "foo_pkey"
DETAIL: Key (id)=(1) already exists.
ROLLBACK
BEGIN
INSERT 0 1
COMMIT
psql test -c "select * from foo"
id
- ----
1
2
(2 rows)
8<----------------------

Thoughts?

Joe

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Joseph E Conway
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