firebird-qa/tests/bugs/test_core_4950.py

#coding:utf-8
#
# id:           bugs.core_4950
# title:        Statistics for any system index can not be updated/recalculated
# decription:   
# tracker_id:   CORE-4950
# min_versions: ['3.0']
# versions:     3.0
# qmid:         None

import pytest
from firebird.qa import db_factory, isql_act, Action

# version: 3.0
# resources: None

substitutions_1 = []

init_script_1 = """"""

db_1 = db_factory(page_size=4096, sql_dialect=3, init=init_script_1)

test_script_1 = """
    recreate table stat(idx_name varchar(31), stat_init double precision, stat_curr double precision);
    recreate table test(id int primary key, pid int references test(id), x int, y int, unique(x,y));
    create or alter view v_stat as
    select 
      iif( ri.rdb$index_name starting with 'RDB$PRIMARY', 
           'RDB$PRIMARY',  
           iif( ri.rdb$index_name starting with 'RDB$FOREIGN', 
                'RDB$FOREIGN', 
                'RDB$UNIQUE' 
              ) 
         ) as idx_name
     ,ri.rdb$statistics idx_stat
    from rdb$indices ri
    where ri.rdb$relation_name = upper('test');
    commit;
    
    insert into test(id, pid, x, y) values( 0, null, null, null);
    
    set term ^;
    execute block as
        declare i int = 1;
        declare n int = 999;
    begin
        while (i < n) do 
        begin
            insert into test(id, pid, x, y) values( :i, :i / 2, iif( mod(:i,2)=0, :i/2, null ), iif( mod(:i,2)=0, null, :i/2 ));
            i = i + 1;
        end
    end
    ^
    set term ;^
    commit;
    
    insert into stat(idx_name, stat_init) select idx_name, idx_stat from v_stat;
    commit;
    
    set list on;
    
    set term ^;
    execute block as
    begin
        for 
            select trim(ri.rdb$index_name) idx_name
            from rdb$indices ri
            where ri.rdb$relation_name = upper('test')
            as cursor c
        do 
            execute statement 'set statistics index ' || c.idx_name;
    end
    ^
    set term ;^
    commit;
    
    merge into stat t
    using(select idx_name, idx_stat from v_stat) s
    on t.idx_name = s.idx_name
    when matched then update set t.stat_curr = s.idx_stat
    when not matched then insert(idx_name, stat_curr) values( s.idx_name, s.idx_stat);
    
    commit;
    
    select idx_name, abs( sign( stat_curr - stat_init ) ) stat_diff
    from stat
    stat order by idx_name;
  """

act_1 = isql_act('db_1', test_script_1, substitutions=substitutions_1)

expected_stdout_1 = """
    IDX_NAME                        RDB$FOREIGN
    STAT_DIFF                       1

    IDX_NAME                        RDB$PRIMARY
    STAT_DIFF                       1

    IDX_NAME                        RDB$UNIQUE
    STAT_DIFF                       1
  """

@pytest.mark.version('>=3.0')
def test_core_4950_1(act_1: Action):
    act_1.expected_stdout = expected_stdout_1
    act_1.execute()
    assert act_1.clean_expected_stdout == act_1.clean_stdout