RE: BUG #17525: Range partition by date won't allow the use of a date that is the upper bound

I have found the secret! I need to specify the upper bound to be the 1st of the next month as the partition constraint
isa < not <= check
 

So my former definition

partition=> \d+ avm.avm_history_201704
                                                                      Table "avm.avm_history_201704"
    Column    |         Type          | Collation | Nullable |                        Default                        |
Storage | Compression | Stats target | Description
 

--------------+-----------------------+-----------+----------+-------------------------------------------------------+----------+-------------+--------------+-------------
 model_type   | character varying(4)  |           |          |                                                       |
extended|             |              |
 
 model_id     | integer               |           |          |                                                       |
plain   |             |              |
 
 est_date     | date                  |           | not null |                                                       |
plain   |             |              |
 
 address_id   | integer               |           |          |                                                       |
plain   |             |              |
 
 est          | integer               |           |          |                                                       |
plain   |             |              |
 
 conf         | numeric(8,4)          |           |          |                                                       |
main    |             |              |
 
 comps_used   | bigint                |           |          |                                                       |
plain   |             |              |
 
 last         | smallint              |           |          | 0                                                     |
plain   |             |              |
 
 est_id       | integer               |           | not null | nextval('avm.avm_history_part_est_id_seq1'::regclass) |
plain   |             |              |
 
 est_smoothed | integer               |           |          |                                                       |
plain   |             |              |
 
 dipid        | character varying(20) |           |          |                                                       |
extended|             |              |
 
 fsd          | numeric(4,1)          |           |          |                                                       |
main    |             |              |
 
Partition of: avm.avm_history_part FOR VALUES FROM ('2017-04-01') TO ('2017-04-30')
Partition constraint: ((est_date IS NOT NULL) AND (est_date >= '2017-04-01'::date) AND (est_date <
'2017-04-30'::date))
Indexes:
    "avm_history_201704_est_date_idx" btree (est_date)
    "avm_history_201704_est_date_idx1" btree (est_date)
    "avm_history_201704_est_id_est_date_idx" UNIQUE, btree (est_id, est_date)
    "avm_history_201704_model_id_est_date_dipid_idx" UNIQUE, btree (model_id, est_date, dipid)
Access method: heap

Becomes

partition=> \d+ avm.avm_history_201704
                                                                      Table "avm.avm_history_201704"
    Column    |         Type          | Collation | Nullable |                        Default                        |
Storage | Compression | Stats target | Description
 

--------------+-----------------------+-----------+----------+-------------------------------------------------------+----------+-------------+--------------+-------------
 model_type   | character varying(4)  |           |          |                                                       |
extended|             |              |
 
 model_id     | integer               |           |          |                                                       |
plain   |             |              |
 
 est_date     | date                  |           | not null |                                                       |
plain   |             |              |
 
 address_id   | integer               |           |          |                                                       |
plain   |             |              |
 
 est          | integer               |           |          |                                                       |
plain   |             |              |
 
 conf         | numeric(8,4)          |           |          |                                                       |
main    |             |              |
 
 comps_used   | bigint                |           |          |                                                       |
plain   |             |              |
 
 last         | smallint              |           |          | 0                                                     |
plain   |             |              |
 
 est_id       | integer               |           | not null | nextval('avm.avm_history_part_est_id_seq1'::regclass) |
plain   |             |              |
 
 est_smoothed | integer               |           |          |                                                       |
plain   |             |              |
 
 dipid        | character varying(20) |           |          |                                                       |
extended|             |              |
 
 fsd          | numeric(4,1)          |           |          |                                                       |
main    |             |              |
 
Partition of: avm.avm_history_part FOR VALUES FROM ('2017-04-01') TO ('2017-05-01')
Partition constraint: ((est_date IS NOT NULL) AND (est_date >= '2017-04-01'::date) AND (est_date < '2017-05-01'::date))
          <-----  This will work
 
Indexes:
    "avm_history_201704_est_date_idx" btree (est_date)
    "avm_history_201704_est_date_idx1" btree (est_date)
    "avm_history_201704_est_id_est_date_idx" UNIQUE, btree (est_id, est_date)
    "avm_history_201704_model_id_est_date_dipid_idx" UNIQUE, btree (model_id, est_date, dipid)
Access method: heap


Please close this bug.

Regards,
Allen Sutton
Allen Sutton
Senior Data Analyst 
m: +64 27 272 8886  w: valocityglobal.com
Wellington, New Zealand
 
 
 
 
    
 
 
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From: PG Bug reporting form <noreply@postgresql.org> 
Sent: Wednesday, 22 June 2022 11:12 am
To: pgsql-bugs@lists.postgresql.org
Cc: Allen Sutton <Allen.Sutton@valocityglobal.com>
Subject: BUG #17525: Range partition by date won't allow the use of a date that is the upper bound

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The following bug has been logged on the website:

Bug reference:      17525
Logged by:          Allen Sutton
Email address:      allen.sutton@valocityglobal.com
PostgreSQL version: 14.4
Operating system:   Ubuntu 22.04LTS
Description:

I have a table that I have partitioned by a field est_date (date).

CREATE TABLE IF NOT EXISTS avm.avm_history_part (
    model_type character varying(4) COLLATE pg_catalog."default",
    model_id integer,
    est_date date NOT NULL,
    address_id integer,
    est integer,
    conf numeric(8,4),
    comps_used bigint,
    last smallint DEFAULT 0,
    est_id integer NOT NULL DEFAULT
nextval('avm.avm_history_part_est_id_seq1'::regclass),
    est_smoothed integer,
    dipid character varying(20) COLLATE pg_catalog."default",
    fsd numeric(4,1)
) PARTITION BY RANGE (est_date);

The partitions of this table are created with a range of a month.

e.g. CREATE TABLE avm.avm_history_201704 PARTITION OF avm.avm_history_part
    FOR VALUES FROM ('2017-04-01') TO ('2017-04-30');

This seems to be causing issues in two ways: - 1. When I prepare a table and then add it as a partition with a date
rangeand est_date in rows equal to the upper bound of the range, Postgres gives me an error that it can't find a
partitionfor the date 2. When I try update a row and set the value of est_date to the upper range, I get an update
errorsuch as
 

ERROR:  new row for relation "avm_history_201704" violates partition constraint
DETAIL:  Failing row contains (A, 11, 2017-04-30, 46846, 1270000, 0.2647, 7, 0, 26563523, 1246000, NZ82047105, 39.9).
SQL state: 23514

I need assistance to work out what I have done wrong if anything and how to resolve this issue