The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.6/static/spi-examples.html
Description:
I did some testing following this page:
https://www.postgresql.org/docs/9.6/static/spi-examples.html.
I got a different result.
According to the webpage, only one row is inserted by following SQL:
SELECT execq('INSERT INTO a SELECT x + 2 FROM a', 1);
But I ran this SQL and two rows were inserted.