DROP TABLE IF EXISTS test_row_count;
NOTICE:  table "test_row_count" does not exist, skipping
DROP TABLE IF EXISTS merge_tab_row_count;
NOTICE:  table "merge_tab_row_count" does not exist, skipping
DROP TABLE IF EXISTS test_row_count1;
NOTICE:  table "test_row_count1" does not exist, skipping
DROP TABLE IF EXISTS test_row_count2;
NOTICE:  table "test_row_count2" does not exist, skipping
DROP PROCEDURE IF EXISTS proc_row_count;
NOTICE:  function proc_row_count() does not exist, skipping
select row_count();
 row_count 
-----------
         0
(1 row)

create table test_row_count(a int);
create table merge_tab_row_count(a int);
select row_count();
 row_count 
-----------
         0
(1 row)

insert into test_row_count values(1),(2),(3),(4),(5);
select row_count();
 row_count 
-----------
         5
(1 row)

insert into merge_tab_row_count values(7);
select row_count();
 row_count 
-----------
         1
(1 row)

merge into merge_tab_row_count using test_row_count on (test_row_count.a = merge_tab_row_count.a)
when not matched then insert values(6);
update test_row_count set a = 7 where a = 1;
select row_count();
 row_count 
-----------
         1
(1 row)

delete from test_row_count where a < 4;
select row_count();
 row_count 
-----------
         2
(1 row)

truncate table test_row_count;
select row_count();
 row_count 
-----------
         0
(1 row)

select * into test_row_count1 from merge_tab_row_count;
select row_count();
 row_count 
-----------
         6
(1 row)

insert into test_row_count values(99999999999999999999999999);
ERROR:  integer out of range
CONTEXT:  referenced column: a
select row_count();
 row_count 
-----------
        -1
(1 row)

drop table merge_tab_row_count1;
ERROR:  table "merge_tab_row_count1" does not exist
select row_count();
 row_count 
-----------
        -1
(1 row)

select * from merge_tab_row_count1;
--?.*
LINE 1: select * from merge_tab_row_count1;
                      ^
select row_count();
 row_count 
-----------
        -1
(1 row)

create table test_row_count2(a int);
create table test_row_count2(a int);
ERROR:  relation "test_row_count2" already exists in schema "public"
DETAIL:  creating new table with existing name in the same schema
select row_count();
 row_count 
-----------
        -1
(1 row)

create procedure proc_row_count(a out int, b out int)
as
begin
  insert into test_row_count values(1),(2);
  select row_count() into a;
  raise info 'a=%',a;
  insert into test_row_count values(3);
  select row_count() into b;
  raise info 'b=%',b;
  insert into test_row_count values(4);
  insert into test_row_count values(5);
end;
/
call proc_row_count(a,b);
INFO:  a=2
INFO:  b=1
 a | b 
---+---
 2 | 1
(1 row)

select row_count();
 row_count 
-----------
        -1
(1 row)

DROP TABLE IF EXISTS test_row_count;
DROP TABLE IF EXISTS test_row_count1;
DROP TABLE IF EXISTS test_row_count2;
DROP TABLE IF EXISTS merge_tab_row_count;
DROP PROCEDURE IF EXISTS proc_row_count;
select row_count();
 row_count 
-----------
         0
(1 row)