Use functions or expressions in Postgres alias names - possible?

Question

Is it possible to use functions or expressions to create an alias name?

For example, is there a way to use concat like this?

SELECT
  id."myamazingrecords"
FROM
  records AS CONCAT("my", "amazing", "records")

I'm looking for a general way to programmatically (via SQL) rename columns in the output of my query.

Laurenz Albe · Accepted Answer · 2018-11-20 20:53:55Z

2

No, an alias has to be a literal.

You can either construct the alias in client code before you send the query to the server, or you use a PL/pgSQL function that executes a dynamic query like

EXECUTE format('SELECT id."myamazingrecords" FROM records AS %I',
                CONCAT('my', 'amazing', 'records'));

answered Nov 20, 2018 at 20:53

Laurenz Albe

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