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Questions tagged [read-only-database]

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21 votes
2 answers
35k views

Make Postgres database temporarily read-only (for performing volume snapshots)

The PostgreSQL built-in backup mechanism isn't always very suitable. Sometimes, you want to put the application in a quiescent state, because it has external data with which you want to backup at the ...
Otheus's user avatar
  • 614
15 votes
1 answer
464 views

Columnstore Index in read_only filegroup prevents CheckDB

It appears setting a filegroup to read_only prevents dbcc checkdb for the entire database if the filegroup contains a columnstore index. When attempting to run checkdb or checkfilegroup (for any ...
Peter Vandivier's user avatar
7 votes
1 answer
12k views

Postgres: permission denied for relation for read_only user [closed]

I am trying to set up a new read only user in postgres. I did the following steps to create the new user: sudo -u postgres createuser --interactive name: read_only_user superuser: n ...
mgerbracht's user avatar
6 votes
2 answers
30k views

Obvious reason Postgres Users can't read a table?

Situation: a PG user (non superuser, inherits from parent role) that is a member of a Role/Group cannot read from specific tables even though these Object Privileges have been specified: DBName - ...
GPP's user avatar
  • 211
6 votes
1 answer
7k views

Create temp tables in Amazon RDS PostgreSQL read-replica

I have dozens of legacy stored procedures which create temporary tables inside for collecting results for a read-only application. I've created a read-replica of my PostgreSQL in Amazon RDS and tried ...
Andremoniy's user avatar
5 votes
2 answers
4k views

SQL server Read Only permission automatically for new databases

When I setup my database I create a sql user that my application runs as. The sql user gets read only access to all the databases on the server. The problem is the user won’t have read only access to ...
Jason Webber's user avatar
5 votes
1 answer
20k views

Do I need to execute "create extension pgcrypto" everytime?

I have used crypt() in one of my functions to hash user password. But what I observed the next day I started my pc that the same thing failed as cryptographic functions became unavailable upon restart....
Arjun_TECH's user avatar
5 votes
1 answer
11k views

Revoke write privileges vs setting database to readonly

I am planning to do a database migration to a new server. During the transition stage, I do not want Apache user to be able to write anything to the database. I have two options. Revoke write ...
Question Overflow's user avatar
5 votes
2 answers
2k views

Using postgres_fdw to connect from one read replica to another

I have two postgres database servers in AWS, A and B. These databases have different tables. Both databases also have their own read replica. My goal is a simple solution for doing cross database ...
maniciam's user avatar
  • 235
4 votes
1 answer
1k views

Query performance on static, large PostgreSQL table

I tried to have this as detailed as possible. Sorry about the length! Background I created the following partitioned table protein_snp_assoc on a PostgreSQL (version 12.13) database: CREATE TABLE ...
jommi's user avatar
  • 43
4 votes
2 answers
26k views

Insert- and Read-only table in Postgres

I want to create an "immutable" Postgres database, where users can insert/select (write/read) data only, but can not update/delete (change/delete). I came to know there is FOR UPDATE lock, but did ...
Hasan A Yousef's user avatar
4 votes
1 answer
18k views

Create new Read Only user on DB2 on the whole database

I am an oracle/sql server DBA having limited knowledge in IBM DB2. We have DB2 9.7 fp4 running on AIX 6. I would like to create a new user and grant him READ only privilege on a particular database. ...
muddu83's user avatar
  • 153
4 votes
1 answer
1k views

Query a database specific configuration parameter

I have a postgres 9.6 server with > 100 databases on it. When doing a mass-migrate, I use statements like this: ALTER DATABASE mydatabase SET default_transaction_read_only = false; Which works great....
spookypeanut's user avatar
3 votes
3 answers
4k views

Unable to create read-only user in PostgreSQL 9.5

I seem to be having trouble creating a read-only user for a database in a fresh install of PostgreSQL 9.5 with PostGIS 2.2 on Ubuntu 16.04. Here is what I've done so far: Ran this, CREATE ROLE ...
PGNEWB's user avatar
  • 31
3 votes
2 answers
3k views

How do I map a SQL Server login to a user that already exists in a read-only database?

One of our database users complains that they can't select from one of the databases in this particualr instance while they have no problems in accessing others in this very same instance. The one ...
RGO's user avatar
  • 423
3 votes
1 answer
15k views

How can I expose an Amazon RDS database as read only to other partners who access through home broadband?

In one of our projects we have hosted our web application on an Amazon Linux AMI instance and it relies on a Amazon RDS MySQL instance as DB server. One of our client's developer wants to have access ...
Narayanan's user avatar
3 votes
1 answer
13k views

How to start mysqld with read-only data directory?

I'm trying to start MariaDB in a docker container, using a data directory from the host mounted read-only. MySQLd is of course shut down on the host. Unfortunately, even with adding the read_only flag ...
Thomas Johnson's user avatar
3 votes
1 answer
122 views

Does SQL Server route connections to a secondary replica which has commit mode as synchronous in case of an AG with multiple secondary nodes?

If I have an AG with 4 different nodes as below: Primary Node Secondary Node 1 - Asynchronous Commit - Read Only Yes Secondary Node 2 - Synchronous Commit - Read Only No Secondary Node 3 - ...
karun_r's user avatar
  • 349
3 votes
1 answer
2k views

Set a filegroup to readonly

I have a set of dimensions which are updated only during specific times. I have moved these tables to a specific filegroup named Dimensions. I wanna keep this filegroup as readonly. When ETL runs, it ...
Hikari's user avatar
  • 1,563
3 votes
0 answers
766 views

Table queries locked during long insert SQL server

Everyday runs a sql job that loads data from bulk files and load them in auxiliary tables, to adapt and then copy to the destination table where applications read (and only read) the data. I am ...
Rodrigo Rivera's user avatar
3 votes
0 answers
1k views

Optimizing a single table, write-once, read-many PostgreSQL database

I've just finished constructing a table of ~835 million rows using Google's ngram dataset, aggregated on the years in which they occurred so that each 2-,3-,4-, and 5-gram is represented by a single ...
James Pizzurro's user avatar
2 votes
5 answers
3k views

Prevent read access on primary AG replica, but allow it on the readable secondary

We have a unique situation where we want to allow users to query a readable secondary replica of a database with SSMS for adhoc reporting, but not allow them to ever read from the primary replica. We ...
GoodwinSQL's user avatar
2 votes
3 answers
168 views

Restrictions on user-defined queries

I have a client that wants me to implement a webpage that allows users to enter custom queries in a text box so they can directly query the SQL Server database. I am concerned about users entering ...
hershmans's user avatar
2 votes
1 answer
2k views

Implications of setting READ_Write

I am looking to update several users on READ_ONLY databases. As the databases are used 24/7 globally, and maintenance windows have just past, I would like to do this during a low-activity moment (to ...
Reaces's user avatar
  • 2,611
2 votes
2 answers
3k views

Are Availability Group Databases on a Secondary replica automatically set to read-only by the AG?

I have read through the MS docs on read-only routing, but I am not talking about that. Currently, if I execute an UPDATE against a database that is on a Secondary replica and is part of the ...
youcantryreachingme's user avatar
2 votes
3 answers
3k views

How to backup a secondary log shipped standby mode database

We have a secondary transaction log shipped database configured for standby mode. Its primary purpose is for data recovery and for select only queries for reports etc. As the database is very big we ...
hamish's user avatar
  • 179
2 votes
1 answer
821 views

Fix mysql replication crashed due to underlying storage corruption

we have critical database server running on two virtual machines. one virtual machine crashed due to underlying storage problem and we had to move it to different storage medium and recover the xfs ...
rafalefighter's user avatar
2 votes
2 answers
4k views

Optimising MySQL database with read only tables

I have a MySQL database with 15 tables. Three of them are used for website authentication and three other are tables that are frequently read and written to. Then other tables are set in stone and I'd ...
Shahid Thaika's user avatar
2 votes
1 answer
155 views

Track write requests on Read-only database

I have changed one of the databases to read-only in SQL Server 2005. I would like to track if someone tries to write to the database. Any suggestions on how to track such requests (end user write ...
Vijred's user avatar
  • 447
2 votes
1 answer
1k views

Sql server/azure connection string parameter for readonly access?

Is there a specific parameter that can be used in a SQL server/azure connection string to specify that the connection should be readonly? In other words, only SELECT queries should work but INSERT/...
Clement's user avatar
  • 536
2 votes
1 answer
3k views

Synchronizing a RDS instance with another RDS instance

I have a database on an RDS Instance (master) that needs to be synchronized to another RDS instance (slave). I created a read-replica for the first one, but that is created as read_only so I cannot do ...
Kanuj Bhatnagar's user avatar
2 votes
2 answers
3k views

Mysql 8.0 and read-only not working as expected

I have a new Master/Slave config running. Everything is happily replication. I have added a secondary user whose role will be to manage the databases and tables. Currently the following privileges ...
Rossi's user avatar
  • 21
2 votes
0 answers
1k views

Secondary Replica Read-Only Routing via Linked Server working from one server, but not the other

I have been given the task of setting up a read-only linked server on ServerA to Availability Group listener ListnerX. ListnerX points to ServerY or ServerZ (ServerY is usually the primary). Read-only ...
AdamM's user avatar
  • 21
2 votes
0 answers
473 views

Basic PostgreSQL 9.x Performance Optimization Strategies for Reads/Analysis

Postgres comes, out of the box, configured as a general purpose database for both OLTP and OLAP types of loads. My need is to do use Postgres, in this case, purely as an OLAP running aggregate queries ...
Edmon's user avatar
  • 759
1 vote
1 answer
500 views

Why can't my read-only user role see any of my tables' primary key information in psql?

I have a PostgreSQL database on Azure, and I've created a readonly_user role that allows for external parties to connect to the db in a read-only capacity using a connection string. This readonly_user ...
justadampaul's user avatar
1 vote
2 answers
3k views

What's the difference between --read-only and just permit SELECT queries?

I'm using Amazon Aurora and I have two endpoints, my endpoint which can read/write are having some issues to execute queries, these are the issues: SQLSTATE[HY000]: General error: 1290 The MySQL ...
Rafael Corrêa Gomes's user avatar
1 vote
1 answer
1k views

Can we configure logins to only connect to read-only replicas in Azure SQL Database automatically?

For Read-Only routing, rather than explicitly using "ApplicationIntent=ReadOnly" into our application connection string or for individual users to specify it in additional properties, can ...
Venkat's user avatar
  • 131
1 vote
1 answer
605 views

read only replica of azure sql database within the same server

I have the following bicep to create a sql server and sql database: resource sqlServer 'Microsoft.Sql/servers@2021-02-01-preview' = { name: sqlServerName location: location identity: { type: ...
user989988's user avatar
1 vote
1 answer
267 views

Is there any AWS RDS Utility to Manage Master Slave mysql db with read write splitting?

I am looking for a solution for production which can manage the read and write splitting on master and slave connection as i can't affford to define multiple connection string for R/W in whole ...
MGupta's user avatar
  • 13
1 vote
2 answers
144 views

Proc caching on read only db's/replicas

I've been given the task of finding which stored procs are being called in our database. To that end I started querying sys.dm_exec_cached_plans. All is well and good, until I go over to our ...
J Brun's user avatar
  • 131
1 vote
1 answer
303 views

How to set mariadb read_write for some specific tables while starting as read_only=1

I am trying to set a mariadb slave which is exact replica of master db. As per the suggestion I start my slave with command --relay-log=mysql-relay-bin" "--log-slave-updates=1" "--read-only=1" . But ...
SkyRar's user avatar
  • 125
1 vote
0 answers
127 views

How do read queries against Postgres's JSONB type compare to Couchbase?

I'm working on a small project which would involve running queries against deeply-nested (up to 5 layers) keys in dictionaries. This would be specifically a read-heavy environment, with only one large ...
Jules's user avatar
  • 23
0 votes
1 answer
124 views

How do I create user logins on my read replica database?

Is it possible to have different users accessing my read replica DB? Isn't this in fact a popular use case for a read replica? I want a certain limited set of credentials to have access to my primary ...
Yossi Geretz's user avatar
0 votes
1 answer
3k views

PostgreSQL 9.3, set database (or all) to read only mode

Is any simple function/command for PostgreSQL 9.3 to set whole database to read only mode and then back to RW mode? For example same as for MySQL: FLUSH TABLES WITH READ LOCK; LOCK TABLES customers ...
genderbee's user avatar
  • 191
0 votes
2 answers
86 views

How can I monitor query performance on my Azure read-replica database?

I'm looking at Query Performance Insight for my read-replica database. But the information it shows are the performance stats from the primary database. How can I get the performance stats for the ...
Yossi Geretz's user avatar
0 votes
1 answer
68 views

What happens to my read-replica database in failover mode?

I have a few basic questions about Azure failover. I am new to failover. I've been reading the literature and I'm ready to give this a shot. Before I take the plunge, I'd like to have a better ...
Yossi Geretz's user avatar
0 votes
1 answer
2k views

Alter database from Read-Only to Regular mode? A warm-standby database is read-only (Error 5063)

I am trying to change the mode of database from "Standby / Read-Only" to "Normal" mode so that I could use mdf file to attach to other SQL Server. One instruction that I got was go ...
Java's user avatar
  • 233
0 votes
1 answer
661 views

Solution for a readonly copy of a standalone MongoDB server

I store some data in many databases/collections on a standalone MongoDB server. This server is used for production. I need to access those data (or at least nightly build data, and not all databases/...
AlterPHP's user avatar
  • 103
0 votes
1 answer
667 views

Does read-only activity on synchronous secondary replica slow down primary replica in Availability Group?

Suppose that we have an Availability Group configuration (SQL Server 2017) where primary and synchronous secondary do not share any resources (each replica have dedicated CPU, memory, disk, etc.) ...
Aleksey Vitsko's user avatar
0 votes
1 answer
309 views

Are there security-issues with a read-only-account on Oracle-DBs?

I am currently working as IT-maintenance-guy for a classic MVC-system(oracle-db/jboss) at public sector. The newest feature should be the shutdown of my oracle-db-readOnly-Account cause of "security ...
bofredo's user avatar
  • 109