On 2018-Aug-28, PG Bug reporting form wrote:
> Step 3. Try inserting a row which will have remainder 0 after modulus
> operation
> postgres=# insert into hash_parted values (10);
> ERROR: no partition of relation "hash_parted" found for row
> DETAIL: Partition key of the failing row contains (a) = (10).
>
> FAILED!
The hash function for integers does not return the input integer,
therefore the modulus is not that of the integer value. This is not a
bug.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
