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Added/Updated tests\bugs\core_2078_test.py: Removed output of execution plans after note by dimitr. This test probably needs to be re-implemented because initially it was designed for check NESTED LOOPS.
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pavel-zotov
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@ -35,24 +35,31 @@ DESCRIPTION:
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FETCHES_2_1 19548
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FETCHES_2_2 19548
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NOTES:
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[18.08.2020]
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Test uses pre-created database which has several procedures for analyzing performance by with the help of MON$ tables.
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Performance results are gathered in the table STAT_LOG, each odd run will save mon$ counters with "-" sign and next
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(even) run will save them with "+" -- see SP_GATHER_STAT.
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Aggegation of results is done in the view V_AGG_STAT (negative values relate to start, positive to the end of measure,
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difference between them means performance expenses which we want to evaluate).
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NOTE. Before each new measure we have to set generator G_GATHER_STAT to zero in order to make it produce proper values
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starting with 1 (odd --> NEGATIVE sign for counters). This is done in SP_TRUNCATE_STAT.
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[18.08.2020]
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FB 4.x has incompatible behaviour with all previous versions since build 4.0.0.2131 (06-aug-2020):
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statement 'alter sequence <seq_name> restart with 0' changes rdb$generators.rdb$initial_value to -1 thus next call
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gen_id(<seq_name>,1) will return 0 (ZERO!) rather than 1.
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See also CORE-6084 and its fix: https://github.com/FirebirdSQL/firebird/commit/23dc0c6297825b2e9006f4d5a2c488702091033d
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[18.08.2020]
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Test uses pre-created database which has several procedures for analyzing performance by with the help of MON$ tables.
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Performance results are gathered in the table STAT_LOG, each odd run will save mon$ counters with "-" sign and next
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(even) run will save them with "+" -- see SP_GATHER_STAT.
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Aggegation of results is done in the view V_AGG_STAT (negative values relate to start, positive to the end of measure,
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difference between them means performance expenses which we want to evaluate).
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NOTE. Before each new measure we have to set generator G_GATHER_STAT to zero in order to make it produce proper values
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starting with 1 (odd --> NEGATIVE sign for counters). This is done in SP_TRUNCATE_STAT.
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[18.08.2020]
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FB 4.x has incompatible behaviour with all previous versions since build 4.0.0.2131 (06-aug-2020):
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statement 'alter sequence <seq_name> restart with 0' changes rdb$generators.rdb$initial_value to -1 thus next call
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gen_id(<seq_name>,1) will return 0 (ZERO!) rather than 1.
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See also CORE-6084 and its fix: https://github.com/FirebirdSQL/firebird/commit/23dc0c6297825b2e9006f4d5a2c488702091033d
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This is considered as *expected* and is noted in doc/README.incompatibilities.3to4.txt
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Because of this, it was decided to change code of SP_TRUNCATE_STAT: instead of 'alter sequence restart...' we do
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reset like this: c = gen_id(g_gather_stat, -gen_id(g_gather_stat, 0));
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[16.12.2023]
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Removed output of execution plans after note by dimitr (letter 15.12.2023 10:05): this test probably needs to be re-implemented
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because initially it was designed for check NESTED LOOPS. To be discussed furter.
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This is considered as *expected* and is noted in doc/README.incompatibilities.3to4.txt
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Because of this, it was decided to change code of SP_TRUNCATE_STAT: instead of 'alter sequence restart...' we do
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reset like this: c = gen_id(g_gather_stat, -gen_id(g_gather_stat, 0));
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JIRA: CORE-2078
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FBTEST: bugs.core_2078
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"""
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@ -115,10 +122,6 @@ test_script = """
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)
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as
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begin
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-- Refresh index statistics all user (non-system) tables.
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-- Needs to be run in regular basis (`cron` on linux, `at` on windows)
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-- otherwise ineffective plans can be generated when doing inner joins!
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-- Example to run: select * from srv_recalc_idx_stat;
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for
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select ri.rdb$relation_name, ri.rdb$index_name
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from rdb$indices ri
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@ -179,13 +182,13 @@ test_script = """
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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 plan on;
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--set plan on;
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select count(*) cnt_1_1
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from tsml s
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join tbig b on b.sid = s.id
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join tmed m on b.mid = m.id
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;
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set plan off;
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--set plan off;
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execute procedure sp_gather_stat; ------- catch statistics AFTER measured statement(s)
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commit;
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@ -194,14 +197,14 @@ test_script = """
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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 plan on;
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--set plan on;
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select count(*) cnt_1_2
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from tsml s
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join tbig b on b.sid = s.id
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join tmed m on b.mid = m.id
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where s.sf = 0 -- selective non-indexed boolean
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;
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set plan off;
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--set plan off;
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execute procedure sp_gather_stat; ------- catch statistics AFTER measured statement(s)
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commit;
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@ -228,29 +231,31 @@ test_script = """
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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 plan on;
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--set plan on;
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select count(*) cnt_2_1
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from tsml s
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join tbig b on b.sid = s.id
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join tmed m on b.mid = m.id
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;
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set plan off;
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--set plan off;
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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-2.2 -------------------
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execute procedure sp_gather_stat; ------- catch statistics BEFORE measured statement(s)
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commit;
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set plan on;
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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 plan on;
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select count(*) cnt_2_2
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from tsml s
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join tbig b on b.sid = s.id
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join tmed m on b.mid = m.id
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where s.sf = 0 -- selective non-indexed boolean
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;
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set plan off;
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execute procedure sp_gather_stat; ------- catch statistics AFTER measured statement(s)
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--set plan off;
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execute procedure sp_gather_stat; ------- catch statistics AFTER measured statement(s)
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commit;
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@ -309,10 +314,8 @@ fb3x_expected_out = """
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RUN1_IDX_NAME TSML_PK
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RUN1_IDX_STAT 0.0666666701
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PLAN JOIN (M NATURAL, B INDEX (TBIG_IDX2_FK_MED), S INDEX (TSML_PK))
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CNT_1_1 3000
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PLAN JOIN (S NATURAL, B INDEX (TBIG_IDX1_FK_SML), M INDEX (TMED_PK))
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CNT_1_2 1500
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RUN2_TAB_NAME TBIG
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@ -331,10 +334,8 @@ fb3x_expected_out = """
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RUN2_IDX_NAME TSML_PK
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RUN2_IDX_STAT 0.0222222228
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PLAN JOIN (M NATURAL, B INDEX (TBIG_IDX2_FK_MED), S INDEX (TSML_PK))
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CNT_2_1 3000
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PLAN JOIN (M NATURAL, B INDEX (TBIG_IDX2_FK_MED), S INDEX (TSML_PK))
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CNT_2_2 1500
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FETCHES_1_1 acceptable
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@ -360,10 +361,8 @@ fb5x_expected_out = """
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RUN1_IDX_NAME TSML_PK
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RUN1_IDX_STAT 0.0666666701
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PLAN HASH (JOIN (M NATURAL, B INDEX (TBIG_IDX2_FK_MED)), S NATURAL)
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CNT_1_1 3000
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PLAN HASH (JOIN (S NATURAL, B INDEX (TBIG_IDX1_FK_SML)), M NATURAL)
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CNT_1_2 1500
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RUN2_TAB_NAME TBIG
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@ -382,10 +381,8 @@ fb5x_expected_out = """
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RUN2_IDX_NAME TSML_PK
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RUN2_IDX_STAT 0.0222222228
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PLAN HASH (JOIN (M NATURAL, B INDEX (TBIG_IDX2_FK_MED)), S NATURAL)
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CNT_2_1 3000
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PLAN HASH (JOIN (S NATURAL, B INDEX (TBIG_IDX1_FK_SML)), M NATURAL)
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CNT_2_2 1500
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FETCHES_1_1 acceptable
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FETCHES_1_2 acceptable
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@ -396,6 +393,5 @@ fb5x_expected_out = """
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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 = fb3x_expected_out if act.is_version('<5') else fb5x_expected_out
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act.execute()
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#assert act.stdout == act.clean_expected_stdout
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act.execute(combine_output = True)
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assert act.clean_stdout == act.clean_expected_stdout
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