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 is a < 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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-----Original Message-----
From: PG Bug reporting form <noreply(at)postgresql(dot)org>
Sent: Wednesday, 22 June 2022 11:12 am
To: pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: Allen Sutton <Allen(dot)Sutton(at)valocityglobal(dot)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(dot)sutton(at)valocityglobal(dot)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 range and est_date in rows equal to the upper bound of the range, Postgres gives me an error that it can't find a partition for the date 2. When I try update a row and set the value of est_date to the upper range, I get an update error such 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