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Asked: 2026-06-14T18:50:50+00:00

I am writing a database application on PostgreSQL that has two parts: GUI –

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I am writing a database application on PostgreSQL that has two parts:

  1. GUI – written in Symfony/Doctrine
  2. Processing – written in C/libpq

The processing component will process data from a table after it has been inserted by the GUI. However, how does the processing component know there is a change? My default answer would have been to use the PostgreSQL notify/listen commands, as I’m keen to avoid some kind of polling.

Questions:

  1. Is there some way that the Symfony application could use the postgresql notify command? Doctrine supports Native SQL selects, but I don’t believe this is what I need.

  2. Any other ideas?

Thanks in advance.

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1 Answer

  1. Editorial Team

    A native SELECT should be entirely sufficient.

    While you usually use the NOTIFY statement, it’s also possible to call the pg_notify function for the same effect.

    SELECT pg_notify('key','payload');

    Your worker can LISTEN key; as normal, and will receive notifications generated this way the same as if NOTIFY was used.

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