![]() ![]() WARNING: PostgreSQL Column Type Changes Will Lock The Table ![]() If you do not use the USING clause, castings can fail and throw errors, like we saw above. When we use the USING clause, we provide an explicit way to transform the values. PostgreSQL will implicitly cast the common values and the constraints to the new data type if you do not use the USING clause, but this doesn’t work for all column type changes. USING Is Not Always Required For Column Type Changes For example we could create a custom function that performs a complex operation and use this instead. ![]() While this example is fabricated, this is a foundation for much more complex and useful transformations. In this simple example we’re converting the value of the title column to be a character count for the original title using a built in PostgreSQL function. Yum.Įxpand your database knowledge with our technical blog.ĪLTER TABLE book ALTER COLUMN title TYPE INTEGER USING ( char_length ( title )) Learn how to use Beekeeper Studio with bite-sized articles. See a list of everything Beekeeper Studio has to offer Work across multiple devices, or share your connections and queries with others. Quickly iterate on a SQL query, view and visualize results, and share with a colleague.Ī spreadsheet like interface to view, navigate, search, and edit your data.Īn easy to use no-code interface to create and alter tables, indexes, foreign keys, and more. PostgreSQL - Change The Type Of A Column, A Walkthrough With Examples | Beekeeper Studio Beekeeper Studio menuĮxperience a truly modern SQL editor that really sweats the details. ![]()
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