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POSTGRESQL QUESTIONS

What is a simple way to disable a given postgresql database cluster?
What is a simple way to disable a given postgresql database cluster?
will be helpful for those in need PostgreSQL installations that have pg_ctlcluster (Debian-based) look for a start.conf file in /etc/postgresql// with these contents:
TAG : postgresql
Date : November 22 2020, 03:01 PM , By : Yan Cui
ERROR: syntax error at or near "schedule_id"
ERROR: syntax error at or near "schedule_id"
Hope this helps In addition to the comment about the proper create table statement, you have an extra space in COLLATE pg_catalog. default. Note that it is also a useless statement that you could completely remove.PS: due to copy/paste, you have this
TAG : postgresql
Date : November 21 2020, 03:00 PM , By : Marion Mary Njeri
What is the fastest way to add indices and an ID primary key column to a large table?
What is the fastest way to add indices and an ID primary key column to a large table?
it should still fix some issue First, your command doesn't create four indices. It creates two indices in which the first is a composite index (which may not be exactly what you want because column order matters whether or not the planner will choose
TAG : postgresql
Date : November 19 2020, 03:01 PM , By : John Blatchford
How to describe columns (get their names, data types, etc.) of a SQL query in PostgreSQL
How to describe columns (get their names, data types, etc.) of a SQL query in PostgreSQL
This might help you http://sqlfiddle.com/!17/21c7a/2You can use systems table :
TAG : postgresql
Date : November 19 2020, 03:01 PM , By : simran gill
flatten/concat-aggregate JSONB array
flatten/concat-aggregate JSONB array
hope this fix your issue I have a JSONB column that contains JSON arrays. I now need to get all distinct values from all rows into one single array. , You should unnest the arrays before using the aggregate:
TAG : postgresql
Date : November 18 2020, 03:01 PM , By : abdellah
Save classifier to postrgesql database, in scikit-learn
Save classifier to postrgesql database, in scikit-learn
around this issue Here is sample code in python for sending the trained model to a Postgres table. Note that you first need to create a table that has a column with the "bytea" type to store the pickled sklearn model in bineary format.
TAG : postgresql
Date : November 14 2020, 03:01 PM , By : Mukesh Kumar
Postgresql WAL archive_command file compare
Postgresql WAL archive_command file compare
I think the issue was by ths following , If I read your pseudo-code correctly, you'll overwrite WAL segments in the archive if they are not identical to your current WAL-to-be-archived.The problem with that is that WAL archives are very important inf
TAG : postgresql
Date : November 12 2020, 03:00 PM , By : qwe
Mediawiki migration error: relation "page" does not exist
Mediawiki migration error: relation "page" does not exist
should help you out I have migrated mediawiki from CentOS 5 to CentOS 6, from Postgres 8.1 to Postgres 8.4. , I have made the mediawiki static since it is going to be archived.
TAG : postgresql
Date : November 12 2020, 03:00 PM , By : Moses3M
sqlalchemy/postgresql: get database 'as-of' timestamp of a query
sqlalchemy/postgresql: get database 'as-of' timestamp of a query
wish of those help If you perform your query within a transaction, then localtimestamp will refer to the transaction start time.For example:
TAG : postgresql
Date : November 09 2020, 03:01 PM , By : 白伟仝
Can I use .pgpass in SELinux? [centos7, pgagent_96, postgresql 9.6.5]
Can I use .pgpass in SELinux? [centos7, pgagent_96, postgresql 9.6.5]
seems to work fine I had the same problem with CentOS 7. My solution for you is:as first, check some variables in the service script:
TAG : postgresql
Date : November 08 2020, 03:01 PM , By : Viktor Pavlenko
Migration tries to create sequence that already exists
Migration tries to create sequence that already exists
will help you Workaround:Commented out everything in the Up(MigrationBuilder migrationBuilder) method of the initial migration.
TAG : postgresql
Date : November 08 2020, 03:01 PM , By : Carlos Sánchez
Efficiently selecting from a large table using floor() in Postgres
Efficiently selecting from a large table using floor() in Postgres
hop of those help? I have two tables: One with squares with columns x and y over the natural numbers, and another with points on this grid created by the first table. Example schema: , You can use a CTE, as it is evaluated once only.
TAG : postgresql
Date : November 07 2020, 03:01 PM , By : Adrian Kropidłowski
Implementing multi tenant data structure using multiple schemas or by customerId table column
Implementing multi tenant data structure using multiple schemas or by customerId table column
wish helps you There are major tradeoffs here. With customer id's your foreign keys become more complex (the customer id should probably be a part of every foreign key) and that means additional indexes. It also means you have to have some means of e
TAG : postgresql
Date : November 07 2020, 03:01 PM , By : MSM
find all points in t2 within 1000m of all points in t1
find all points in t2 within 1000m of all points in t1
Any of those help All you're doing is selecting the count just move the clause out of the select list to trim up the join.
TAG : postgresql
Date : November 05 2020, 03:01 PM , By : Nicolas Miranda
What is JDBC counterpart of Postgres' "\connect" command?
What is JDBC counterpart of Postgres' "\connect" command?
it fixes the issue Backslash commands are not PostgreSQL SQL commands, they're commands in the psql command-line utility. Behind the scenes, \connect just closes the connection and opens a new one.PostgreSQL its self does not have any way to switch d
TAG : postgresql
Date : November 04 2020, 03:01 PM , By : Berkhan Deniz
Order by ASC 100x faster than Order by DESC ? Why?
Order by ASC 100x faster than Order by DESC ? Why?
will help you This typically only happens when OFFSET and / or LIMIT are involved (as is the case here).The key difference is this line in the EXPLAIN output for the query with DESC:
TAG : postgresql
Date : November 03 2020, 03:01 PM , By : Âbdël Ïlâh Küdô-kûn
Select into an array of composite types in plpgsql
Select into an array of composite types in plpgsql
Hope that helps Are composite type arrays the correct way to simulate a "function scoped" table in plpgsql? , consider using
TAG : postgresql
Date : November 01 2020, 03:01 PM , By : Kawal Arora
Postgresql pattern matching performance
Postgresql pattern matching performance
will be helpful for those in need This predicate effectively searches for all prefixes for a given string:
TAG : postgresql
Date : November 01 2020, 03:01 PM , By : user7450089
How do I cluster my PRIMARY KEY in postgres
How do I cluster my PRIMARY KEY in postgres
like below fixes the issue I noticed in postgres when we create a table, it seems to automatically creates a btree index on the PRIMARY KEY CONSTRAINT. Looking at the properties of the CONSTRAINT, it would appear it is not clustered. How do I cluster
TAG : postgresql
Date : November 01 2020, 03:01 PM , By : สุชัณสินี ลิปิกาพร
How to search database with using uuid?
How to search database with using uuid?
it fixes the issue I'm assuming you want to do a substring search in the hex representation of a UUID (e.g. "%a%" should match and "%e%" should not match for 015cd1d7-2794-4247-a24f-16b84ca9a3ac). You can do this by explicitly converting the UUID val
TAG : postgresql
Date : October 30 2020, 04:01 PM , By : darsh
postgres: can I prepare unnamed statement from SQL
postgres: can I prepare unnamed statement from SQL
should help you out No. Unnamed prepared statements are only supported on the wire protocol.They're mainly used for one-shot statements with bind parameters, and for batching.
TAG : postgresql
Date : October 30 2020, 04:01 PM , By : Rifki Mubarok
postgresql : self join with array
postgresql : self join with array
I hope this helps . My question is about forming Postgres SQL query for below use case , Try this:
TAG : postgresql
Date : October 25 2020, 09:10 AM , By : Uroš Knupleš
PSQLException: ERROR: syntax error at or near "test"
PSQLException: ERROR: syntax error at or near "test"
it helps some times You need to escape single quotes embedded in string literals by doubling them:
TAG : postgresql
Date : October 24 2020, 08:10 PM , By : Dustin
Postgres transaction id wraparound for non-user tables
Postgres transaction id wraparound for non-user tables
With these it helps The tables you show are all views, and the age of 2147483647 just reflects that relfrozenxid is 0 for them.Views have no tuples, and they need no VACUUM, so these are false positives.
TAG : postgresql
Date : October 24 2020, 08:10 AM , By : user2172228
Can the list of SQLSTATEs be retrieved using SQL?
Can the list of SQLSTATEs be retrieved using SQL?
This might help you I don't think there's any way to ask a Postgres server for the full list of SQLSTATEs.The Postgres build process actually generates its C definitions for the error codes (as well as the HTML documentation) from this machine-readab
TAG : postgresql
Date : October 23 2020, 08:10 PM , By : user2172453
How to iterate over SELECT query results in PL/pgSQL?
How to iterate over SELECT query results in PL/pgSQL?
hop of those help? You ruled out problems with visibility (missing privileges for tables of interest). See: How to check if a table exists in a given schema
TAG : postgresql
Date : October 22 2020, 08:10 PM , By : Dinesh Vakamudi
An error occurred while loading the map layer 'default': Shape Plugin: shapefile 'true.shp' does not exist
An error occurred while loading the map layer 'default': Shape Plugin: shapefile 'true.shp' does not exist
wish help you to fix your issue Finally, I found the solution.The problem came from Mapnik version.
TAG : postgresql
Date : October 22 2020, 08:10 PM , By : Dio
Stop PostgreSQL from spliting value(s) in multiple lines?
Stop PostgreSQL from spliting value(s) in multiple lines?
Hope this helps psql doesn't split your string in multiple lines.It's the string that contains new-line characters (ASCII 10), and psql displays them accurately. The + at the end of every line is psql's way of telling you that the value is continued
TAG : postgresql
Date : October 22 2020, 08:10 AM , By : user2172970
How to showcase the work of MVCC with several parallel sessions in PostgreSQL?
How to showcase the work of MVCC with several parallel sessions in PostgreSQL?
I hope this helps . I need to demonstrate the work of MVCC in PostgreSQL with the help of parallel sessions that will access the same table at the same time. , Session 1:
TAG : postgresql
Date : October 21 2020, 08:10 PM , By : pabitra saha
How to return multiple INSERTED ID's in Postgresql?
How to return multiple INSERTED ID's in Postgresql?
Does that help I have a function which takes two arguments, the first one is an integer and the second one is an array of varchars. , There are more issues:
TAG : postgresql
Date : October 18 2020, 08:10 PM , By : chimbida
SequelizeJS: How to know success or failure when executing an INSERT raw query?
SequelizeJS: How to know success or failure when executing an INSERT raw query?
fixed the issue. Will look into that further First of all you shouldn't be using raw queries until unless you are not able to do anything with sequelize.js , or else there is no use of using this library.Use sequelize.js as much as possible , so that
TAG : postgresql
Date : October 16 2020, 08:10 PM , By : user2174908
facing 'malformed array literal' when trying to insert json in postgres
facing 'malformed array literal' when trying to insert json in postgres
wish of those help You must extract the JSON array element as a text and convert it to a VARCHAR array before inserting.
TAG : postgresql
Date : October 16 2020, 08:10 AM , By : Eduardo Nazato
port Oracle decode() using variadic, anyarray, and anyelement
port Oracle decode() using variadic, anyarray, and anyelement
Does that help Limitation It seems it is how PostgreSQL is implemented. Reading the docs:
TAG : postgresql
Date : October 15 2020, 08:10 AM , By : Gustavo Alonso Rodri
Golang GORM search conditions
Golang GORM search conditions
hope this fix your issue There is no problem with your Search Condition. Simply you have provided multiple IDs in your queries from second iteration. One in Where and another in Find. Let me write an example like yours
TAG : postgresql
Date : October 14 2020, 08:10 PM , By : LEROY
Most efficient way to remove duplicates - Postgres
Most efficient way to remove duplicates - Postgres
may help you . demo:dbfiddleFinding duplicates can be easily achieved by using row_number() window function:
TAG : postgresql
Date : October 14 2020, 02:22 PM , By : user2176030
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