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146 lines
4.8 KiB
Python
146 lines
4.8 KiB
Python
#coding:utf-8
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"""
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ID: issue-530
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ISSUE: 530
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TITLE: CREATE VIEW ignores PLAN
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DESCRIPTION:
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Test verifies that:
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1. "PLAN <...>" clause inside view DLL is always ignored and actual plan will be one of following:
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1.1. That is specified explicitly by client who runs a query to this view;
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1.2. If no explicitly specified plan that optimizer will be allowed to choose that.
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2. One may to specify PLAN on client side and it *WILL* be taken in account.
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NOTES:
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Suppose that some view contains explicitly specified PLAN NATURAL it its DDL.
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If underlying query became suitable to be run with PLAN INDEX (e.g. such index was added to the table)
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then this 'PLAN NATURAL' will be IGNORED until it is explicitly specified in the client query.
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See below example #4 for view v_test1 defined as "select * from ... plan (t natural)".
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JIRA: CORE-203
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FBTEST: bugs.core_0203
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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()
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test_script = """
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set bail on;
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recreate view v_test4 as select 1 x from rdb$database;
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recreate view v_test3 as select 1 x from rdb$database;
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recreate view v_test2 as select 1 x from rdb$database;
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recreate view v_test1 as select 1 x from rdb$database;
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recreate table test(x int, y int);
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commit;
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insert into test(x,y) select rand()*100, rand()*10000 from rdb$types,rdb$types rows 10000;
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commit;
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create index test_x_asc on test(x);
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create descending index test_x_desc on test(x);
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create index test_y_x on test(y, x);
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create index test_x_y on test(x, y);
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create index test_sum_x_y on test computed by (x+y);
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create descending index test_sub_x_y on test computed by (x-y);
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commit;
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recreate view v_test1 as select * from test t where x = 0 plan (t natural);
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recreate view v_test2 as select * from test t where x = 0;
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recreate view v_test3 as select * from test t where x = 0 plan (t index(test_x_desc));
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recreate view v_test4 as select * from v_test3;
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commit;
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set planonly;
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--set echo on;
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select * from test t where x = 0 plan (t natural); -- 1
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select * from v_test1 v1; -- 2
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select * from v_test1 v2; -- 3
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select * from v_test1 v1 where v1.x = 0 plan (v1 natural); -- 4
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select * from v_test2 v2 where v2.x = 0 plan (v2 natural); -- 5
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select * from v_test1 v1 where v1.x = 0 PLAN (V1 INDEX (TEST_X_DESC)) ; -- 6
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select * from v_test2 v2 where v2.x = 0 PLAN (V2 INDEX (TEST_X_DESC)) ; -- 7
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select * from v_test1 v1 where v1.x = 50 and v1.y = 5000 PLAN (V1 INDEX (test_x_y)) ; -- 8
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select * from v_test1 v2 where v2.x = 50 and v2.y = 5000 PLAN (V2 INDEX (test_y_x)) ; -- 9
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select * from v_test1 v1 where v1.x + v1.y = 1000 PLAN (V1 INDEX (test_x_y)); -- 10
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select * from v_test2 v2 where v2.x - v2.y = 1000 PLAN (V2 INDEX (test_x_y)); -- 11
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select * from v_test1 v1 where v1.x + v1.y = 1000 PLAN (V1 INDEX (test_sum_x_y)); -- 12
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select * from v_test2 v2 where v2.x - v2.y = 1000 PLAN (V2 INDEX (test_sub_x_y)); -- 13
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-- NB: here optimizer will use index __NOT__ from view V3 DDL:
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-- PLAN (V3 T INDEX (TEST_X_ASC))
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select * from v_test3 v3; -- 14
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select * from v_test3 v3 plan ( v3 index(test_x_y) );
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-- NB: here optimizer will use index __NOT__ from view V3 DDL:
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-- PLAN (V4 V_TEST3 T INDEX (TEST_X_ASC))
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select * from v_test4 v4; -- 15
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select * from v_test4 v4 PLAN (V4 V_TEST3 T INDEX (TEST_X_Y)); -- 16
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"""
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act = isql_act('db', test_script, substitutions=[('[ ]+', ' ')])
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expected_stdout = """
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PLAN (T NATURAL)
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PLAN (V1 T INDEX (TEST_X_ASC))
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PLAN (V2 T INDEX (TEST_X_ASC))
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PLAN (V1 T NATURAL)
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PLAN (V2 T NATURAL)
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PLAN (V1 T INDEX (TEST_X_DESC))
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PLAN (V2 T INDEX (TEST_X_DESC))
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PLAN (V1 T INDEX (TEST_X_Y))
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PLAN (V2 T INDEX (TEST_Y_X))
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PLAN (V1 T INDEX (TEST_X_Y))
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PLAN (V2 T INDEX (TEST_X_Y))
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PLAN (V1 T INDEX (TEST_SUM_X_Y))
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PLAN (V2 T INDEX (TEST_SUB_X_Y))
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PLAN (V3 T INDEX (TEST_X_ASC))
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PLAN (V3 T INDEX (TEST_X_Y))
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PLAN (V4 V_TEST3 T INDEX (TEST_X_ASC))
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PLAN (V4 V_TEST3 T INDEX (TEST_X_Y))
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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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