Denis Shirokov zpl

## postgres-debug.sql
/*
example:

#

WITH RECURSIVE t(n) AS (
                        VALUES (debug('init: ' || 1,1))
                        UNION ALL
                        SELECT debug('recursion: ' || n+1 ,n+1)
                        FROM t
	/*
	example:

	#

	WITH RECURSIVE t(n) AS (
	VALUES (debug('init: ' \|\| 1,1))
	UNION ALL
	SELECT debug('recursion: ' \|\| n+1 ,n+1)
	FROM t