1
vote
1answer
31 views

Update new column with value from old columns for all the rows

I've got an odd db design in place that was here when I got on my new work space. We have a column named params which contains some string data which appears that it belongs in more than one column, ...
1
vote
2answers
93 views

What is a good solution for reliably transferring data between SQL Server and PostgreSQL?

In analyzing some of our business data, we're realizing that we need to join data across disparate data sources. For example, our application data is warehoused in Postgres (ported from MongoDB via ...
5
votes
1answer
165 views

If PostgreSQL starts after copying data, is the data ok?

I'm copying the data for a PostgreSQL database, that is, /var/lib/postgresql, from one server to another. The servers are identical except for the fact that one is 32bit and the other one is 64. I ...
0
votes
1answer
49 views

Postgres database dump and restore on different database [closed]

I have two Postgres databases on the same server, which have the same schemas. The goal is to have DB1 as the production and DB2, as the database that will receive all the data that is migrated from a ...
2
votes
2answers
115 views

Problem translating MySQL to PostgreSQL

We're using Trac for issue tracking. I migrated it from MySQL to PostgreSQL, but some of the ticket queries no longer work. In the below, all I did this far is replace IFNULL() with COALESCE() and ...
1
vote
2answers
72 views

how to upgrade and migrate postgres dbs to new server machine?

my production databases run on a centos 5.5 virtual machine. This server has 2 postgres 8.4 clusters installed on 2 different partitions; now my idea is to upgrade both db version and server os ...
1
vote
2answers
505 views

Migration from SQL Server 2008 to Postgres 9.2 [closed]

I have a rather large database (2 GB of data, 25 million rows in the largest table) on a shared web hosting. The database engine is Microsoft SQL Server 2008. Due to high fees for the SQL Server web ...
1
vote
0answers
79 views

How can I ensure a valid MySQL -> Postgres migration? [closed]

Our projects are migrating from MySQL to Postgres. We have a Ruby-on-Rails app that handles the schema (source code is on github). We have rewritten all queries to be ANSI-compliant. We have tried ...
3
votes
1answer
96 views

Migrating database live while being severely handicapped

I "inherited" a web application which is designed and implemented horribly (both the application and the database). For example, the main data is stored using a sort of emulated key-value storage in a ...
3
votes
0answers
192 views

Stubborn autovacuum process slow things dows

We are facing a strange problem since yesterday. In a database of ours there is a partitioned table containing historical data. That is, every week's data goes to a different partition and stays ...
0
votes
1answer
740 views

Moving data between Oracle and PostgreSQL

For a future project I need to use the following setup: Some small (offline) data boxes (colleting data over the time) fill PostgreSQL databases. (Summing up to about 1 TB a year. For time to time, I ...
3
votes
1answer
610 views

“Zero” downtime and minimal space requirements for upgrade to PostgreSQL 9.2

Need to migrate from PostgreSQL 8.3.x to 9.2 Constraint 1: 8.4 and above have made datetime format to be integer by default. Wasn't so in 8.3.x. As a result pg_upgrade can't be used. Unless server is ...
3
votes
2answers
237 views

Migrating and normalizing data

We are rewriting a large Django application which uses a MySQL database, and the database schema needs to undergo major modifications. We're also porting the app to use PostgreSQL, for a couple of ...
3
votes
1answer
328 views

Oracle to PostgreSQL

I'm having som test databases running Oracle 10 & 11 that I plan to try to migrate to PostgreSQL. Some googling hinted that the perl script "ora2pg" could be of use, and free of charge. However, ...
1
vote
2answers
244 views

PostgreSQL Database Migration

How can I migrate data from on PostgreSQL database to another PostgreSQL database? Is there any technique to migrate data with SQL scripting?
17
votes
1answer
4k views

Best practices for schema changes and data migrations to a live database without downtime?

How do you make schema changes to a live database without downtime? For instance, lets say I have a PostgreSQL database with a table including various user data like email addresses etc, all ...
7
votes
2answers
15k views

How to solve UTF8 invalid byte sequence copy errors on a restore, when the source database is encoded in UTF8?

I was given the task to migrate a PostgreSQL 8.2.x database to another server. To do this I'm using the pgAdmin 1.12.2 (on Ubuntu 11.04 by the way) and using the Backup and Restore using the ...
9
votes
1answer
3k views

How to migrate large blob table from mysql to postgresql?

I'm now in process of migrating my MySQL database to PostgreSQL. Almost everything went fine (well, after lots of googling for correct mysqldump params etc.) except one table I have - actually the ...
5
votes
2answers
564 views

Save postgres database from broken ubuntu 10.04 server

Recently a database server with an important db broke (some grub linux issue that I'd prefer not to solve). I can still access the filesystem. Is there a chance to transfer the database by only ...
10
votes
4answers
4k views

Tools to migrate from SQLite to PostgreSQL

I need to continuously migrate from SQLite to PostgreSQL. By continuously, I mean that I will reimport the SQLite database into PostgreSQL every day. It would be nice if I could make changes to the ...