The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/13/executor.html
Description:
It's located within the parentheses of the last paragraph.
>(A simple INSERT ... VALUES command creates a trivial plan tree consisting
of a single Result node, which computes just one result row, and ModifyTable
above it to perform the insertion. But INSERT ... SELECT can demand the full
power of the executor mechanism.)
I'm under the impression that the second inline code block refers to `INSERT
... VALUES`.