Load simple XML file into Postgres [duplicate]

StackOverflow https://stackoverflow.com/questions/22771503

  •  25-06-2023
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Question

I have a file with a simple xml structure that I want to load into a Postgres table.

<rows>
<field name="id">1</field>
<field name="age">75-84</field>
<field name="gndr">F</field>
<field name="inc">32000-47999</field>
</rows>

Is there an easy way of doing this?

Was it helpful?

Solution

Well, it can be done. I wrote a complete function for the same purpose a while back:

I use pg_read_file() to read in the whole file into a variable in plpgsql and proceed from there. This carries a few restrictions:

Only files within the database cluster directory and the log_directory can be accessed. Use a relative path for files in the cluster directory, and a path matching the log_directory configuration setting for log files. Use of these functions is restricted to superusers.

But I listed alternatives.

If you can convert the XML file to JSON it gets simpler. There are a bunch of tools for that available.

Starting with Postgres 9.3 you get pretty good support for the json data type.
Better yet, use the jsonb data type in Postgres 9.4+.

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