mirror of
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156 lines
4.7 KiB
Python
156 lines
4.7 KiB
Python
#coding:utf-8
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"""
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ID: issue-5228
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ISSUE: 5228
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TITLE: View/subselect with "union" does not use computed index
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DESCRIPTION:
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JIRA: CORE-4937
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FBTEST: bugs.core_4937
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"""
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import pytest
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from firebird.qa import *
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db = db_factory(from_backup='mon-stat-gathering-2_5.fbk')
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test_script = """
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-- ::: NB ::: Plans in 2.5 and 3.0 differ (see below).
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-- It was decided to check number of natural reads gathered
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-- from mon$ statistics rather than filter plan text with
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-- finding word 'NATURAL'.
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-- Checked on:
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-- 2.5.5.26916 - had non-zero natural reads in statistics
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-- 2.5.5.26933, 3.0.0.32052 - all Ok.
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set term ^;
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execute block as begin execute statement 'drop sequence g'; when any do begin end end
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^
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set term ;^
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commit;
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create sequence g;
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recreate view test_view as select 1 id from rdb$database;
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recreate table test1 (id int not null primary key, tms timestamp default current_timestamp);
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recreate table test2 (id int not null primary key, tms timestamp default current_timestamp);
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alter table test1 add occurred int computed by (case when tms < current_timestamp then 1 else 0 end);
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alter table test2 add occurred int;
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recreate view test_view as select * from test1 union select * from test2;
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commit;
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insert into test1(id, tms)
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select gen_id(g,1), dateadd( -gen_id(g,1) minute to cast('now' as timestamp) )
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from rdb$types
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rows 200;
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insert into test1(id, tms)
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select gen_id(g,1), dateadd( gen_id(g,1) minute to cast('now' as timestamp) )
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from rdb$types
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rows 200;
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insert into test2(id, tms)
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select gen_id(g,1), dateadd( -gen_id(g,1) minute to cast('now' as timestamp) )
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from rdb$types
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rows 200;
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insert into test2(id, tms)
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select gen_id(g,1), dateadd( gen_id(g,1) minute to cast('now' as timestamp) )
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from rdb$types
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rows 200;
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update test2 set occurred = case when tms < current_timestamp then 1 else 0 end;
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commit;
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create index test1_occ on test1 computed by (case when tms < current_timestamp then 1 else 0 end);
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create index test2_occ on test2(occurred);
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commit;
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execute procedure sp_truncate_stat;
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commit;
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set list on;
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--------------------- run-1 -------------------
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execute procedure sp_gather_stat; -- catch statistics BEFORE measured statement(s)
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commit;
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select count(*) cnt_1 from test1 where occurred = 1;
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execute procedure sp_gather_stat; -- catch statistics AFTER measured statement(s)
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commit;
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--------------------- run-2 -------------------
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execute procedure sp_gather_stat; -- catch statistics BEFORE measured statement(s)
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commit;
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select count(*) cnt_2 from test2 where occurred = 1;
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execute procedure sp_gather_stat; -- catch statistics AFTER measured statement(s)
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commit;
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--------------------- run-3 -------------------
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execute procedure sp_gather_stat; -- catch statistics BEFORE measured statement(s)
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commit;
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-- in 2.5:
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-- PLAN (TEST1 INDEX (TEST1_OCC))
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-- PLAN (TEST2 INDEX (TEST2_OCC))
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-- in 3.0:
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-- PLAN SORT (TEST1 INDEX (TEST1_OCC), TEST2 INDEX (TEST2_OCC))
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select count(*) cnt_3 from (select * from test1 union select * from test2) where occurred = 1;
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execute procedure sp_gather_stat; -- catch statistics AFTER measured statement(s)
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commit;
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--------------------- run-4 -------------------
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execute procedure sp_gather_stat; -- catch statistics BEFORE measured statement(s)
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commit;
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-- in 2.5:
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-- PLAN (TEST_VIEW TEST1 INDEX (TEST1_OCC))
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-- PLAN (TEST_VIEW TEST2 INDEX (TEST2_OCC))
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-- in 3.0:
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-- PLAN SORT (TEST_VIEW TEST1 INDEX (TEST1_OCC), TEST_VIEW TEST2 INDEX (TEST2_OCC))
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select count(*) cnt_4 from test_view where occurred = 1;
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execute procedure sp_gather_stat; -- catch statistics AFTER measured statement(s)
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commit;
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-------------------------------------------------
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-- Output statistics. Natural reads in all cases should be 0 (zero):
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select 'run_' || a.rowset as run_no, a.natural_reads from v_agg_stat a;
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"""
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act = isql_act('db', test_script)
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expected_stdout = """
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CNT_1 200
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CNT_2 200
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CNT_3 400
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CNT_4 400
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RUN_NO run_1
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NATURAL_READS 0
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RUN_NO run_2
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NATURAL_READS 0
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RUN_NO run_3
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NATURAL_READS 0
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RUN_NO run_4
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NATURAL_READS 0
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"""
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@pytest.mark.version('>=3')
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def test_1(act: Action):
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act.expected_stdout = expected_stdout
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act.execute()
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assert act.clean_stdout == act.clean_expected_stdout
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