Questions tagged [postgresql-9.4]
PostgreSQL version 9.4
498
questions
1
vote
1
answer
22
views
Merging wifi session data if time between them is less than 15 minutes
I am trying to process network logs and join sessions together if the time between them is less than 15 minutes. The relevant fields are start time, end time, mac address, and wifi access point.
I am ...
- 13
0
votes
0
answers
19
views
Generate the next records for a specific condition
I am using postgresql.
The table details
Create table weather_forecast (
date date,
temperature decimal,
avg_humidity decimal,
avg_dewpoint decimal,
avg_barometer decimal,
avg_windspeed decimal,
...
0
votes
0
answers
78
views
Check Existence Before Creating - Select, Insert, on conflict return
I've the following code that creates mapbox vector tiles and inserts them for storage. In the final code each xyz tile will be unique. Before the below code I would like to check the storage table to ...
1
vote
0
answers
111
views
User Permissions for WAL files
I'm setting up replication on Postgres. (expect more questions later :-)
I'm putting the WAL files on the NAS so that both servers have access to the files.
The Postgres service is running as "...
- 111
0
votes
1
answer
276
views
In Postgresql how do I get localtime as the TimeZone to work on FreeBSD?
PostgreSQL: 9.4
FreeBSD: 11.2
When I set my TimeZone parameter in postgresql.conf to localtime I receive the following error when trying to start PostgreSQL.
service postgresql restart
<2022-06-02 ...
- 121
0
votes
1
answer
269
views
DELETEd Lots of Rows from pg_largeobject, pg_freespacemap Curiosity
postgres noobie, PG 9.4 (please don't say I need to update PG, thx)
Database has huge pg_largeobject (PGLOB) table (~450GB, 169.5M rows, lots of DML leading to ~95GB/~22% free space - all per ...
- 69
2
votes
0
answers
90
views
Cannot Create Extension vacuumlo postgresql 9.4
I tried to CREATE EXTENSION vacuumlo, but it fails with the following message:
"/usr/pgsql-9.4/share/extension/vacuumlo.control": no such file or directory.
I can see other .sql and ....
- 69
0
votes
1
answer
3k
views
Invalid input syntax for timestamp error with Postgres Copy command
I am trying to load data in Postgres through COPY command in a SQL file
COPY <table name> (<column1>, <column2>, <column3> etc etc) FROM stdin;
1 test1 test2 ...
- 123
1
vote
1
answer
1k
views
Count of Saturdays and Sundays in a given month in PostgreSQL
How can I get a count of the Saturdays and the Sundays in a given month in PostgreSQL?
I am getting total days count, or total Saturday and Sunday days in a month.
For month days code:
SELECT ...
- 13
1
vote
2
answers
4k
views
Postgresql update slow on a relative small/medium table
I'm trying to run an update on a table with 10 million rows (I just need to update a few), but the query is taking more time than I would like.
This is the table deinifition:
CREATE TABLE ...
- 11
1
vote
1
answer
866
views
pgAdmin - "cannot open logfile!" (WINDOWS 10; Postgres 9.4)
Our Windows 10 clients have both PostgreSQL 9.4 and pgAdmin3 (v1.22) installed.
I keep receiving the FATAL: "Cannot open the logfile!" error by invoking pgAdmin3 in either
of the following ...
- 13
1
vote
1
answer
618
views
PostgreSQL - 1 billion rows table cannot get vacuumed despite no errors
I have a statistics table that should be processed in a scheduled task to remove rows and count them into a separate, smaller table. Unfortunately the cron task failed for some period of time and the ...
- 11
-1
votes
1
answer
969
views
Single query to replace a value in multiple tables with same column
I am using Postgres SQL. I am having multiple tables say table1, table2, table3, table4, ... with a common column say name in each of the tables. I want to replace a the value 'Jhon' with 'Jimmy' in ...
- 3
1
vote
2
answers
252
views
Unexpected behaviour for GROUP BY query
CREATE TABLE public.temp (
id integer,
a integer,
b integer,
x integer
);
select x, a, b
from temp
group by id, a, b;
ends up with expected error:
ERROR: column "temp.x&...
- 133
3
votes
3
answers
4k
views
Why is the database size larger than sum of table sizes
I wanted to know why database size is a way greater than thesum of table size in a database? How does it change?
- 53
2
votes
1
answer
256
views
Caveats of OUTER JOIN on nested JSON value
I'm writing a query which is supposed to find the elements from a list which DO NOT exist in the DB. My first attempt at this was to use a nested query where the first query fetches the ids, then I ...
- 165
0
votes
0
answers
432
views
How to take backup of PostgreSQL 9.4 database to remote server using pg_basebackup?
We want to take the logical and base backup on different server machine in the network. Currently both backups are running on same server machine causing space issues. We have the scripts in place ...
- 21
0
votes
0
answers
183
views
WAL Archival not working in PostgreSQL V9.4.9 DB server
Our DB servers are on VM, during planned server restart for system patch deployment our Master DB server crashed.
We have taken the clone of Primary Slave VM and restore the Master DB using last ...
- 21
1
vote
0
answers
59
views
Postgres Major version upgrade 9.4 -> 9.6. PITR compatibility across versions?
Just dug into postgres documentation and couldn't get a clear answer on this. With Debian Jessie hitting EOL for Debian LTS in June, we are upgrading our database servers along with our other servers ...
- 11
3
votes
0
answers
3k
views
How do I fix multixact wraparound after it has already occurred?
I have a database which has a single table for which MultiXact wraparound has already occurred. Neither manual vacuums nor automatic vacuums are able to fix this condition.
Manual vacuums fail almost ...
- 249
1
vote
1
answer
760
views
Does the Postgres 9.4.9 update fix MultiXactId "does no longer exist" in addition to "has not been created yet" errors?
Postgres 9.4.9 has a fix in it's release notes which reads (emphasis mine):
Prevent possible failure when vacuuming multixact IDs in an installation that has been pg_upgrade'd from pre-9.3 (Andrew ...
- 249
2
votes
1
answer
1k
views
Does postgres single-user mode use postgresql.conf settings?
Does running postgres in single-user mode (--single argument) cause postgres to start and use the settings present in the postgresql.conf file in the data directory defined by the -D option?
I am ...
- 249
0
votes
1
answer
302
views
Postgres 9.4.5 small table grows into huge size - periodic VACUUM FULL needed
We are running a PostgreSQL database on Windows Server. The database version is 9.4.5 (it's been running stable for a long time now so we aren't updating it).
Some of our tables have millions of rows,...
- 1
0
votes
1
answer
823
views
Postgres ignoring GIN index for LIKE query?
I am working in Postgres 9.4. I have a table and index like this:
Table "public.title"
Column | Type | ...
- 245
0
votes
1
answer
169
views
slow count queries - what are we doing wrong?
Using Postgresql 9.6.14, running the following query:
SELECT COUNT(*) AS "__count"
FROM "crm_client"
INNER JOIN "crm_role"
ON ("crm_client"."role_ptr_id" = "crm_role"."id")
INNER ...
- 101
2
votes
1
answer
5k
views
Postgres - Vacuum doesn't complete on large/busy table
We have a decently active PG database hosted on AWS. We recently started getting notifications like the following:
Transaction ID age reached 750 million. Autovacuum parameter values for [...
- 127
2
votes
1
answer
2k
views
PostgreSQL Correlation Between "max_connections" and "numbackends"
I'm trying to figure out why the field numbackends in pg_stat_database never goes above 16 (and often stays the same even after a restart).
I have max_connections set to 100 and ...
- 21
1
vote
1
answer
358
views
move postgresql 9.4 cluster to new server
I have a redmine postgresql folder backup (no dump) from postgresql 9.4
and want to move it to a new server with debian 10 (buster) with postgres 11.
On my debian buster server I tried to get this ...
- 816
0
votes
1
answer
568
views
Comparing nullable column values using "IS NULL" versus "= NULL"
I'm dealing with nullable values in a column of a table, i'm wondering why this:
with cte as (
select 'c1'::text as c1,null::text as c2
union
select 'c2'::text as c1,null::text as c2
)
...
- 557
0
votes
3
answers
1k
views
How to SELECT "closest" rows from another table?
I have two tables, map1 and map2, there are multiple possible combinations between the columns map1.id1 and map2.id2.
I have tried the below query:
SELECT map1.id1, map2.id2, MIN(...
- 103
0
votes
1
answer
73
views
Allow transparently altering View's underlying table
How to create a view that does not prevent altering its underlying table? There's a certain reason why I can't drop and re-create the view every time I need to change a column type or add a new column....
- 263
0
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0
answers
431
views
Quering Postgresql digest function inside procedure works on pgadmin but not works by calling via Laravel
recently I have created stored procedure in Postgres Sql which deals about with hashing passwords. When used via PgAdmin tool it works like a charm as stated below.
I have also installed extension ...
- 1
0
votes
1
answer
35
views
How to perform count(), count(distinct) in the same output using POSTGRESQL
I am trying to perform both count(distinct(keyword)) and count(keyword) from same tables. Here are the two queries.
Query-1
SELECT t1.count(distinct(keyword)) from keyword t1, sent t2,tweets t3,...
- 113
2
votes
0
answers
207
views
Changing Postmaster File Name in PostgreSQL
I have two instances of PostgreSQL with master-slave replication between them and want to use GlusterFS. Everything works fine until the second instance wants to store the data in the GlusterFS. ...
- 532
0
votes
1
answer
175
views
FUNCTION BEFORE TRIGGER INEXISTENT OPERATOR date > = double precision
In the 'pubblicazione' table I want to insert some fields of the tuple contained in the 'legge_approvata' table, but to do this the promulgation date must be in the same month and year as the date of ...
- 57
0
votes
1
answer
575
views
How to make use of WITH in PostgreSQL to reduce query cost
I am trying to get twitter data of narendramodi using below command.
SELECT b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count,b.favorite_count as like_count,count(...
- 113
1
vote
0
answers
6k
views
How to run multiple sql statements in Postgres using the tool PGADMIN?
I have 170 Alter Drop Constraint statement, 120 Truncate table, 120 Insert table and 170 Alter Add Constraint.
All of these should be run in one in one script as batch script and I'm using PGADMIN IV ...
4
votes
1
answer
5k
views
Use NEW in FROM clause in Postgres trigger?
I am trying to write a Postgres trigger to unnest an array field before inserting or updating a new row. E.g.
SELECT
unnest(something)
FROM NEW
However, this seems to lead to an error:
relation '...
3
votes
1
answer
2k
views
Streaming replication archive folder taking all space- Postgresql- 9.4
We had recently setup postgres streaming replication between master (physical, CentOS release 6.6) and slave(virtual, CentOS 7.6). We did the test and streaming replication is working fine.
We ...
- 163
2
votes
1
answer
239
views
Regarding GIN Index in Postgresql
I am facing an issue that Even after creating a GIN INDEX execution plan is taking much time.
select email from customer where lower(email) like '%gmail';
CREATE INDEX idx1 ON customer USING gin (...
- 21
2
votes
3
answers
311
views
Find all items where the 2 latest statuses meet condition
I have a table in a PostgreSQL database like this:
ID|Item-FK |timestamp|status
=============================
1 | 123 | ... | EXPIRED
2 | 123 | ... | PENDING
...
I want to query all ...
- 123
2
votes
1
answer
2k
views
postgres :: FATAL: could not access file "pglogical": No such file or directory
We installed pglogical from source code, we are running PostgreSQL 9.4
make USE_PGXS=1 clean all
make USE_PGXS=1 install
Installation was successful after updating the parameters, we tried ...
- 21
3
votes
1
answer
3k
views
Streaming replication version between different minor versions
I want to know few details about streaming replication.
I want to setup streaming replication between version 9.4.4 and 9.4.20 ?
I have the master server in centos6.6 with postgres version 9.4.4 ...
- 163
0
votes
1
answer
3k
views
ERROR: relation "codepool_codepoolseq_seq" does not exist SQL state: 42P01
Below is my script but I keep getting an error.
-- Table: public.codepool
-- DROP TABLE public.codepool;
CREATE TABLE public.codepool
(
codepoolseq bigint NOT NULL DEFAULT nextval('...
1
vote
3
answers
13k
views
Downgrading PostgreSQL 10 to 9.4
Are there any particular precautions I should take when downgrading PG 10 to 9.4?
I have a database on Heroku (PG 9.4) which I'm going to upgrade to PG 10.6. In case something goes wrong, I want to ...
- 293
3
votes
2
answers
7k
views
How to dump multiple databases of the same cluster in single execution?
I have 100 databases in my cluster. I need to backup 30 databases (as single file or multiple file, anything is fine). I could do it for tables using pg_dump with -t.
Is there any way to do ...
- 755
0
votes
1
answer
140
views
Streaming replication in postgres question
We have recently setup streaming replication in our Postgres server (t01, t02). t01 is master and t02 is the slave. I want to understand the below two issues:
Recently our /var directory of t01 ...
- 163
1
vote
1
answer
123
views
Merge 2 columns and replace with specific output
The setup is a Debian 8 with Postgres 9.4 (64bit if that matters).
Given following table I want to "search" for a combination of columns first and column sub and replace their output with another ...
- 465
1
vote
0
answers
21
views
Calculate percentages by using JOINS result in postgresql
I am trying to calculate percentages by joining 3 tables data to get the percentages of positive_count, negative_count, neutral_count of each user's tweets. I have succeeded in getting positive, ...
- 113
0
votes
2
answers
79
views
Different results for logically same, but textually different queries
Is there any reason why the following queries would return different results?
select count(id)
from mytable
where
status='active'
and ((textfield1 ilike '%needle%') or (textfield2 ilike '%...
- 323