diff -U3 /home/aardvark/pg_stuff/pg_sandbox/pgsql.rpr/src/test/regress/expected/rpr.out /home/aardvark/pg_stuff/pg_sandbox/pgsql.rpr/src/test/regress/results/rpr.out
--- /home/aardvark/pg_stuff/pg_sandbox/pgsql.rpr/src/test/regress/expected/rpr.out	2023-09-22 09:04:17.770392635 +0200
+++ /home/aardvark/pg_stuff/pg_sandbox/pgsql.rpr/src/test/regress/results/rpr.out	2023-09-22 09:38:23.826458109 +0200
@@ -253,23 +253,23 @@
 );
  company  |   tdate    | price | first_value | last_value 
 ----------+------------+-------+-------------+------------
- company1 | 07-01-2023 |   100 |         100 |        200
+ company1 | 07-01-2023 |   100 |             |           
  company1 | 07-02-2023 |   200 |             |           
  company1 | 07-03-2023 |   150 |             |           
- company1 | 07-04-2023 |   140 |         140 |        150
+ company1 | 07-04-2023 |   140 |             |           
  company1 | 07-05-2023 |   150 |             |           
  company1 | 07-06-2023 |    90 |             |           
- company1 | 07-07-2023 |   110 |         110 |        130
+ company1 | 07-07-2023 |   110 |             |           
  company1 | 07-08-2023 |   130 |             |           
  company1 | 07-09-2023 |   120 |             |           
  company1 | 07-10-2023 |   130 |             |           
- company2 | 07-01-2023 |    50 |          50 |       2000
+ company2 | 07-01-2023 |    50 |             |           
  company2 | 07-02-2023 |  2000 |             |           
  company2 | 07-03-2023 |  1500 |             |           
- company2 | 07-04-2023 |  1400 |        1400 |       1500
+ company2 | 07-04-2023 |  1400 |             |           
  company2 | 07-05-2023 |  1500 |             |           
  company2 | 07-06-2023 |    60 |             |           
- company2 | 07-07-2023 |  1100 |        1100 |       1300
+ company2 | 07-07-2023 |  1100 |             |           
  company2 | 07-08-2023 |  1300 |             |           
  company2 | 07-09-2023 |  1200 |             |           
  company2 | 07-10-2023 |  1300 |             |           
@@ -290,23 +290,23 @@
 );
  company  |   tdate    | price | first_value | last_value 
 ----------+------------+-------+-------------+------------
- company1 | 07-01-2023 |   100 |         100 |        200
+ company1 | 07-01-2023 |   100 |             |           
  company1 | 07-02-2023 |   200 |             |           
  company1 | 07-03-2023 |   150 |             |           
- company1 | 07-04-2023 |   140 |         140 |        150
+ company1 | 07-04-2023 |   140 |             |           
  company1 | 07-05-2023 |   150 |             |           
  company1 | 07-06-2023 |    90 |             |           
- company1 | 07-07-2023 |   110 |         110 |        130
+ company1 | 07-07-2023 |   110 |             |           
  company1 | 07-08-2023 |   130 |             |           
  company1 | 07-09-2023 |   120 |             |           
  company1 | 07-10-2023 |   130 |             |           
- company2 | 07-01-2023 |    50 |          50 |       2000
+ company2 | 07-01-2023 |    50 |             |           
  company2 | 07-02-2023 |  2000 |             |           
  company2 | 07-03-2023 |  1500 |             |           
- company2 | 07-04-2023 |  1400 |        1400 |       1500
+ company2 | 07-04-2023 |  1400 |             |           
  company2 | 07-05-2023 |  1500 |             |           
  company2 | 07-06-2023 |    60 |             |           
- company2 | 07-07-2023 |  1100 |        1100 |       1300
+ company2 | 07-07-2023 |  1100 |             |           
  company2 | 07-08-2023 |  1300 |             |           
  company2 | 07-09-2023 |  1200 |             |           
  company2 | 07-10-2023 |  1300 |             |