2
votes
2answers
71 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
36 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
145 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
71 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
91 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
145 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
587 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
534 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
223 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
299 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
238 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?
15
votes
1answer
3k 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 ...
6
votes
2answers
12k 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
555 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
3k 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 ...