Regression with INSERT/UPDATE...RETURNING statements in driver version 13

Hi,

Since we've upgraded to PSQLODBC 13 we've noticed inconsistency with
what SQLFetch returns when INSERT/UPDATE statement with a RETURNING
clause is executed consecutively.

We're using PostgreSQL ANSI Driver with Postgres 13.

The sequence of events as follows, with the results we're seeing in the
logs.
We've also attached the complete log files for reference.

1. PREPARE ins_invhisthead statement.
   PREPARE upd_invhisthead statement.

2. EXECUTE "BEGIN"

3. EXECUTE upd_invhisthead INTO .... USING .... (Update non-existed
Record #1)
        (UPDATE Statement) SQLExecute  with return code 100
(SQL_NO_DATA_FOUND)
            (Expected)

4. EXECUTE ins_invhisthead INTO .... USING .... (Insert Record #1)
        (INSERT Statement) SQLExecute  with return code 0 (SQL_SUCCESS)
            (Expected)
        (Retrieve RETURNING value) SQLFetch  with return code 0
(SQL_SUCCESS)
            (Expected)

5. EXECUTE upd_invhisthead INTO .... USING .... (Update non-existed
Record #2)
        (UPDATE Statement) SQLExecute  with return code 0 (SQL_SUCCESS)
            (This should have returns code 100 (SQL_NO_DATA_FOUND))
        (Retrieve RETURNING value) SQLFetch  with return code 100
(SQL_NO_DATA_FOUND)
            (The UPDATE statement should have returns code 0, and the
SQLFetch shouldn't be executing here as there is no value to retrieve)

6. EXECUTE ins_invhisthead INTO .... USING .... (Insert Record #2)
        (INSERT Statement) SQLExecute  with return code 0 (SQL_SUCCESS)
            (Expected)
(Retrieve RETURNING value) SQLFetch  with return code 0 (SQL_SUCCESS)
            (Expected)

7. EXECUTE upd_invhisthead INTO .... USING .... (Update non-existed
Record #3)
    (UPDATE Statement) SQLExecute  with return code 100 (SQL_NO_DATA_FOUND)
            (Expected)

8. EXECUTE ins_invhisthead INTO .... USING .... (Insert Record #3)
    (INSERT Statement) SQLExecute  with return code 0 (SQL_SUCCESS)
            (Expected)
        (Retrieve RETURNING value) SQLFetch  with return code 0
(SQL_SUCCESS)
            (Expected)

9. EXECUTE upd_invhisthead INTO .... USING .... (Update Existing Record #2)
        (UPDATE Statement) SQLExecute  with return code 0 (SQL_SUCCESS)
        (Expected)
        (Retrieve RETURNING value) SQLFetch  with return code 100
(SQL_NO_DATA_FOUND)
            (This should have returns the invhisthead_id with return
code 0)

10. EXECUTE ins_invhisthead INTO .... USING .... (Insert Record #2)
    (INSERT Statement) SQLExecute  with return code -1 (SQL_ERROR) 
ERROR: duplicate key value violates unique constraint
"invhead_company_branch_date_cusno_invno_udx
            (Expected)

11. EXECUTE "COMMIT"
--

Patrick Cheung
780-483-2727
1-888-8amador (1-888-826-2367)
www.amador.ca <http://www.amador.ca>
amador business computers inc. <http://www.amador.ca>

------------------------------------------------------------------------
This email message, including any attachments, is for the intended
recipients only and may contain information that is privileged,
confidential, subject to copyright and/or exempt from disclosure under
applicable law. Using, disclosing, copying or distributing such
information by anyone other than the intended recipient is strictly
prohibited. If you have received this message in error, or are obviously
not one of the intended recipients, please notify the sender immediately
by reply email and delete this email message together with any attachments.
------------------------------------------------------------------------