Questions tagged [postgresql-9.4]
PostgreSQL version 9.4
1
vote
0answers
23 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. ...
0
votes
1answer
23 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 ...
0
votes
1answer
24 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(...
0
votes
0answers
4 views
Performance considerations for a standalone server running Postgres 9.4 on 8 CPU core with 47GB RAM
I'm running:
Postgres 9.4
8 CPU cores
47GB RAM
shared_buffers = 13.8GB
work_mem = 32MB
The server gets its workload from 6 web application nodes which connect using JDBC connection pooling. Each web ...
0
votes
0answers
15 views
Is this a good way to move items on update to a different table?
So i have a table 'fruits', which has 2 stage deletion process with first being a soft deletion and the second being a hard deletion that deletes item at various times based on business rules.
This ...
0
votes
0answers
10 views
Unexpected Chunk Number 1(expected 2) for toast value in postgresql
Kindly assist and let me know how to sort this issue out. It would be greatly appreciated as this is in production
[24745]:ERROR: unexpected chunk number 1 (expected 2) for toast value
207293017 ...
0
votes
0answers
30 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 ...
1
vote
1answer
105 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 '...
1
vote
1answer
53 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 ...
1
vote
1answer
30 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 (...
2
votes
3answers
60 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 ...
1
vote
0answers
176 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 ...
0
votes
0answers
11 views
Streaming replication Failover
We are using postgres 9.4.15 in our master and slave server. We want to test the failover scenario where we will be manually turn off host 1(master) and see if failover happens to host 2(slave server)....
1
vote
1answer
118 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 ...
1
vote
0answers
39 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
1answer
297 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 ...
1
vote
2answers
37 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 ...
0
votes
1answer
29 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 ...
1
vote
1answer
30 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 ...
1
vote
0answers
15 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, ...
0
votes
2answers
37 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 '%...
1
vote
1answer
49 views
Postgresql installation, avoid creating “postgres” user
I have a constraint, that I can use only one user on a SUSE Linux Enterprise Server 11.
Now, I need to install PostgreSQL 9.4. Is it possible to somehow avoid the automatic creation of "postgres" ...
0
votes
1answer
420 views
PgBouncer “no more connections allowed (max_client_conn)”
I am using PostgreSQL with PgBouncer, and receive the following error in my application:
08P01: no more connections allowed (max_client_conn)
pgbouncer.ini has the following configuration:
...
3
votes
1answer
648 views
Postgres 9.4 wal_level=logical increases disk space
I am trying to use the AWS Database Migration Service to migrate data from an RDS Postgres instance to an Aurora MySQL instance.
Database Migration Service requires the wal_level to be set as logical ...
4
votes
2answers
76 views
drop database command is cancelled ^C
I want to know what happens when a drop database command is canceled using ^C.
Does it partially removes the data or completely?
1
vote
1answer
46 views
How to get aggregate data from a dynamic number of related rows in adjacent table
EDIT: Unknowing of the rule that prohibits cross-posting, I also asked this on Stackoverflow and chose an answer over there. Since there's another (fully working) answer in this thread though, I won't ...
2
votes
1answer
82 views
How use cascade delete for array field in PostgreSQL?
How can i remove the value from array field?
I need to delete the user id from the university table's user_id array field if exists when i delete any users. so can i do this by using delete cascade ...
1
vote
1answer
38 views
Query Conflicts in Streaming Replication in Postgres 9.4
When using Streaming Replication in Postgres 9.4, when a query makes the standby Postgres "start to count" the max_standby_streaming_delay, changes being made in the primary:
Are dammed at the ...
2
votes
0answers
273 views
Why am I getting permission denied on an ownership change?
My current user is pronto
mediapop_staging=> select current_user;
current_user
--------------
pronto
(1 row)
This user a standard super user created on AWS RDS.
mediapop_staging=> \du ...
2
votes
1answer
47 views
How to use “WHERE” and also “WHERE NOT EXISTS” in the same query and table?
I am trying to add both WHERE and WHERE NOT EXISTS in same query. Below mentioned query1 is working fine, but it returns all the t1 data which does not belong to company1. So I tried query2, but no ...
-1
votes
1answer
962 views
Unpivot a table in PostgreSQL [duplicate]
I need to unpivot a table in PostgreSQL. The first dataset is what I have, the second is what I want:
Below is my schema with sample dataset:
http://www.sqlfiddle.com/#!17/3f45c/1
My understanding ...
0
votes
1answer
212 views
How to query inside jsonb column
I have a column type of jsonb named changes
THis is the structure of my column.
[["change","is_enabled",[false,true]]]
I want to query within the column.
I want to find all the rows that "...
0
votes
0answers
19 views
Postgres backup in single user mode
I have started my db in single user mode. postgres --single -D /usr/local/pgsql/data -O my_database and got into the prompt. Can I take a dump of the db / table from this prompt? Or is there any way ...
1
vote
1answer
55 views
How to find the nearest lat and lang in postgresql
I am trying find the nearest lang and lat from the specified lat and lang
i tried the below mentioned query, in my query i have mentioned the place muscat's lat and lang ,so i want to display the ...
10
votes
3answers
1k views
Fastest way to count how many dates' ranges cover each date from series
I have a table (in PostgreSQL 9.4) that looks like this:
CREATE TABLE dates_ranges (kind int, start_date date, end_date date);
INSERT INTO dates_ranges VALUES
(1, '2018-01-01', '2018-01-31'),
...
0
votes
2answers
103 views
Restarting hot_standby replication when the *slave* fails
Context: master-slave replication on Postgres 9.4, slave died a couple of weeks ago:
the slave copied a WAL-File from the master,
told the master that the file is copied,
the master deleted the ...
0
votes
1answer
18 views
Give particular privileges for a table to existing role
My database have some tables such as:
Table A
Table B
Table C
I'm using user monitoring with read-only permission.
SELECT grantee, privilege_type
FROM information_schema.role_table_grants
WHERE ...
3
votes
4answers
1k views
How to count boolean values in PostgreSQL?
How to count, how may true and false for the field public in postgresql user table
i have tried this query
select
sum(case when false then 1 else 0 end) as false,
sum(case when true then 1 else 0 ...
2
votes
1answer
207 views
Lost data during PostgreSQL minor version upgrade
I had PostgreSQL 9.4.5 installed on MacOS which was done using Homebrew. I wanted to update it to the latest minor version of 9.4, so I did this (if I remember correctly):
brew uninstall postgresql
...
0
votes
1answer
321 views
pg_restore: [archiver] could not find entry for ID 12
I'm trying to restore a dump (-Fd --data-only) from PostgreSQL v9.4.9, but I've come across the following error:
pg_restore: [archiver] could not find entry for ID 12
Exactly the same happens if ...
0
votes
0answers
127 views
PostgreSQL dump issues when importing into AWS RDS
I've been struggling with several adaptations (using sed) of a pg_dump output to match AWS RDS' restrictions on users/roles, but have come to a point where pg_catalog schema access is forbidden and is ...
3
votes
1answer
474 views
PostgreSQL ERROR: cannot freeze committed xmax
First of all, I am new to PostgreSQL database.
In my PostgreSQL log I can see errors bellow and I don't know what is wrong or what I should change.
2018-03-29 10:54:38 CEST::@:[5059]: CONTEXT: ...
0
votes
0answers
21 views
Is it possible restore database from folder in postgresql
I am using postgresql 9.4. Accidentally dropped table don't have any backup system. Is it possible to recover from system image backup.
0
votes
0answers
111 views
Postgresql BDR - size of pg_xlog folder
Trying to figure out why there's a difference in size information for my pg_xlog directory.
Comparing this command:
lab-1:~# du -k /var/lib/postgresql/9.4/data/pg_xlog/
4 /var/lib/postgresql/...
1
vote
0answers
193 views
Postgresql BDR - What causes replication_slots to go inactive?
I'm trying to hunt down what causes replication slots to go inactive. Might seem like a remedial question but I'm noticing that on my master database server, I have many inactive replication slots ...
1
vote
0answers
42 views
Grouping records time interval (start-end time) into groups of specific time interval (eg. 30 min)
I would like a query that would return the count of records that have their start-end time in specific time interval (eg. 30 mins).
For example records:
id|start|end
1|10:00|12:00
2|11:00|12:20
3|10:...
1
vote
1answer
890 views
UPDATE with subquery LIMIT 1 returns multiple rows [duplicate]
I am struggling with a query which is randomly returning multiple rows instead of one. I am using PostgreSQL 9.4.12
The query is the following :
UPDATE folder as f set locked = 'locked', ...
0
votes
1answer
1k views
Get last modified date of table in postgresql
I want know the last modified date of table in postgresql. In SQL Server can get using
SELECT modify_date FROM sys.objects
How to get same thing in Postgres? I am using Postgres 9.4
1
vote
0answers
42 views
Combining two event tables into one postgres view
I have two tables, events and event_logs.
The events table stores the theoretical data on a recurring event whereas the event_log stores specific information on a particular datetime.
Event
+-----...
0
votes
0answers
95 views
Postgres: high difference between “backend_start” and “xact_start” time for first connection query
From whatever connections are being created by the application layer, the first connection is taking a lot of time in execution on DB, rest of following connections are working fast.
Stats from DB ...
