How to Create and Return a Virtual Table from a PostgreSQL Function?

Returning a Virtual Table from a Postgres Function

In Postgres, creating a virtual table (similar to Oracle's virtual tables) can be achieved using a function. This function allows you to return a custom table with a defined structure and content.

Correct Syntax

Here's the corrected syntax for the function you provided:

Key Points

• RETURNS TABLE: Specifies the data type of the virtual table. In this case, it's a table with three integer columns named a, b, and c.
• INSERT: Use INSERT statements to populate the virtual table with data.
• RETURN TABLE: Use RETURN TABLE to return the virtual table from the function.

Calling the Function

You can now call the function to get the virtual table:

Alternative Syntax

In Postgres 8.4 or later, you can also use the following PL/pgSQL syntax:

Simple SQL Solution

For a simple case like this, you can also use a simple SQL statement:

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