mirror of
https://github.com/FirebirdSQL/firebird-qa.git
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127 lines
3.4 KiB
Python
127 lines
3.4 KiB
Python
#coding:utf-8
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"""
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ID: issue-4984
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ISSUE: 4984
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TITLE: Conditions like WHERE <field> = <cursor>.<field> do not use existing index
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DESCRIPTION:
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JIRA: CORE-4675
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FBTEST: bugs.core_4675
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"""
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import pytest
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from firebird.qa import *
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init_script = """
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commit;
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set transaction no wait;
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recreate table t1(id int primary key using index pk_t1_id, x int, y int);
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commit;
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set transaction no wait;
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recreate table t2(id int primary key using index pk_t2_id, x int, y int);
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commit;
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insert into t1
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select r, mod(r, 10), (r/100)*100
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from (
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select row_number()over() r
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from rdb$types a, (select 1 i from rdb$types rows 40) b
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rows 1000
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);
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commit;
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create index t1_x on t1(x);
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commit;
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insert into t2 select * from t1;
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commit;
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create index t2_x on t2(x);
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commit;
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"""
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db = db_factory(from_backup='mon-stat-gathering-3_0.fbk', init=init_script)
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test_script = """
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execute procedure sp_truncate_stat;
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commit;
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execute procedure sp_gather_stat; ------- catch statistics BEFORE measured statement(s)
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commit;
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set transaction no wait;
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set term ^;
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execute block as
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declare a_x int;
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declare v_id int;
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declare v_x int;
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declare v_y int;
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declare c_upd1 cursor for (select id, x, y from t1 where x = :a_x);
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declare c_upd2 cursor for (select id, x, y from t2 where x = :a_x);
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begin
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a_x = 5;
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open c_upd1;
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while (1=1) do begin
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fetch c_upd1 into v_id, v_x, v_y;
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if (row_count = 0) then leave;
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update t1 v set y = c_upd1.x, x = c_upd1.y
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where v.id = :v_id; ----------------- ::: key is specified by VARIABLE which has value from FETCH statement
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end
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close c_upd1;
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open c_upd2;
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while (1=1) do begin
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fetch c_upd2; -- into v_id, v_x, v_y;
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if (row_count = 0) then leave;
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update t2 v set y = c_upd2.x, x = c_upd2.y
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where v.id = c_upd2.id; ------------- ::: key is specified by CURSOR field using "cursor name + dot + field" syntax
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end
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close c_upd2;
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end
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^ set term ;^
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rollback;
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execute procedure sp_gather_stat; ------- catch statistics AFTER measured statement(s)
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commit;
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set list on;
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set width table_name 31;
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-- Show results (differences of saved monitoring counters):
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-- ========================================================
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select v.table_name, v.natural_reads, v.indexed_reads
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from v_agg_stat_tabs v
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where upper(v.table_name) in ( upper('T1'), upper('T2') );
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-- Output for WI-T6.3.0.31374 (Beta 1 official):
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-- TABLE_NAME T1
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-- NATURAL_READS 0
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-- INDEXED_READS 200
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--
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-- TABLE_NAME T2
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-- NATURAL_READS 100000 <<<< this is bad and has been fixed in CORE_4675
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-- INDEXED_READS 100
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"""
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act = isql_act('db', test_script)
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expected_stdout = """
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TABLE_NAME T1
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NATURAL_READS 0
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INDEXED_READS 200
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TABLE_NAME T2
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NATURAL_READS 0
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INDEXED_READS 200
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"""
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@pytest.mark.version('>=3.0')
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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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