--
-- COMMENTS
--
SELECT 'trailing' AS first; -- trailing single line
  first   
----------
 trailing
(1 row)

SELECT /* embedded single line */ 'embedded' AS second;
  second  
----------
 embedded
(1 row)

SELECT /* both embedded and trailing single line */ 'both' AS third; -- trailing single line
 third 
-------
 both
(1 row)

SELECT 'before multi-line' AS fourth;
      fourth       
-------------------
 before multi-line
(1 row)

/* This is an example of SQL which should not execute:
 * select 'multi-line';
 */
SELECT 'after multi-line' AS fifth;
      fifth       
------------------
 after multi-line
(1 row)

--
-- Nested comments
--
/*
SELECT 'trailing' as x1; -- inside block comment
*/
/* This block comment surrounds a query which itself has a block comment...
SELECT /* embedded single line */ 'embedded' AS x2;
*/
SELECT -- continued after the following block comments...
/* Deeply nested comment.
   This includes a single apostrophe to make sure we aren't decoding this part as a string.
SELECT 'deep nest' AS n1;
/* Second level of nesting...
SELECT 'deeper nest' as n2;
/* Third level of nesting...
SELECT 'deepest nest' as n3;
*/
Hoo boy. Still two deep...
*/
Now just one deep...
*/
'deeply nested example' AS sixth;
         sixth         
-----------------------
 deeply nested example
(1 row)

