Questions tagged [schema-migration]

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Removing foreign keys to reduce downtime

In an attempt to reduce downtime on our production servers we are considering using one of the following tools to do schema migrations without any downtime: Percona Toolkit — pt-online-schema-change ...
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Migrate legacy application to new db/schema

I apologize if I made any mistake/missing info, fist post here! I am in the process of rewriting a website from scratch to a newer tech stack with a completely redesigned architecture. The website in ...
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Restructuring table - start with PK or not?

I am restructuring a bunch of tables in my database (in this case using a smaller data type for some columns - in most cases cutting those by ~50%, and they tend to be large columns). I've gone ...
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How to speed up Oracle to PostgreSQL data transfer

I have an Oracle schema that I am transferring to PostgreSQL with ogr2ogr. This particular table has 5 columns with number(22) each. There are some 300M rows. In under 10 minutes I can transfer this ...
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Received an unsupported type from Postgres. (14) (SQLGetData)

I have database in PostgreSQL. It is simplest possible database with schema presented here: http://www.postgresqltutorial.com/postgresql-create-table/ I want to migrate it to MySQL. I trying to ...