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Editorial Team
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Asked: 2026-05-24T07:20:05+00:00

In MySQL it is possible to include MySQL-specific SQL-statements within generic/standard SQL by using

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In MySQL it is possible to include MySQL-specific SQL-statements within generic/standard SQL by using a specific comment syntax such as follows:

INSERT /*! DELAYED */ INTO foo VALUES (1, 2, 3);

This is described at http://dev.mysql.com/doc/refman/5.1/en/comments.html.

Is there any equivalent syntax or hack which could be used with PostgreSQL to embed PostgreSQL-specific statements in the same file?

I would like to make my application portable on both platforms but in some cases I can not find a generic way of doing things and need to do DB specific things. For example putting an automagically incremented column in a table is completely different on these DB engines but most other parts of the DB schema are exactly the same and can be shared. Thus I would rather include just a single create-the-database.sql file in the distribution as it is easier to maintain and feels neater.

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1 Answer

  1. Editorial Team

    My first thought is that I would include a preprocessing step when compiling your code which could then generate a middle tier for each database separately. You could then distribute whichever one was to be used or alternatively have a setting in the application to allow it to switch between the two.

    You would need to have separate testing for each platform, but I would expect that anyway.

    The preprocessor could be as simple as an intelligent search and replace or it could be more complex.

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