November 2015
Beginner
464 pages
9h 46m
English
Content preview from Learning PostgreSQLBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Getting the views dependency tree
When refactoring a certain view, such as adding a new column or changing the column type, one needs to refactor all the views that depend on this particular view. Unfortunately, PostgreSQL does not provide the means to create a logical dump of dependent object.
Getting ready
PostgreSQL provides pg_dump to dump a certain database or a specific set of objects in a database. Also, in development, it is recommended to keep the code in a GIT repository.
Unfortunately, often the SQL code for legacy applications is not maintained in the version control system. In this case, if there is requirement to change a certain view definition or even a column type, it is necessary to identify the affected views, dump them, and then ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.