/**
 * Test for view blocked_and_blocking_activity
 *
 * Every test does raise division by zero if it failes
 *
 * @author: "Stefanie Janine Stölting"<stefanie@proopensource.eu>
 * @license: PostgreSQL https://opensource.org/licenses/postgresql
 */

-- Check view existence
WITH test AS
	(
		SELECT COUNT(*) AS exist
			, 0 AS zero
		FROM pg_catalog.pg_views
		WHERE viewname = 'monitoring_blocked_and_blocking_activity'
	)
SELECT
	CASE
		WHEN 1 / test.exist = 1 THEN
			TRUE
		ELSE
			(1 / zero)::BOOLEAN
	END AS res
FROM test
;

-- Test if the view runs without errors
SELECT *
FROM monitoring_blocked_and_blocking_activity
;