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83 lines
2.1 KiB
Python
83 lines
2.1 KiB
Python
#coding:utf-8
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"""
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ID: issue-4654
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ISSUE: 4654
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TITLE: LAG, LEAD and NTH_VALUE raise error when the second argument is NULL
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DESCRIPTION:
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JIRA: CORE-4331
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FBTEST: bugs.core_4331
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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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recreate table test(id int primary key, x int, y int);
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commit;
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insert into test values(101, 1, 10);
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insert into test values(102, 2, 20);
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insert into test values(103, 3, 30);
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insert into test values(104, 4, 40);
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insert into test values(105, 5, 50);
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insert into test values(106, 6, 60);
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insert into test values(107, 7, 70);
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commit;
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set list on;
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select
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id
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,lag(x,null)over(order by id) x_lag
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,lead(x,null)over(order by id) x_lead
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,nth_value(x,null)over(order by id) x_nth
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from test t
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order by id;
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"""
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act = isql_act('db', test_script)
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expected_stdout = """
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ID 101
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X_LAG <null>
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X_LEAD <null>
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X_NTH <null>
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ID 102
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X_LAG <null>
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X_LEAD <null>
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X_NTH <null>
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ID 103
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X_LAG <null>
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X_LEAD <null>
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X_NTH <null>
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ID 104
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X_LAG <null>
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X_LEAD <null>
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X_NTH <null>
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ID 105
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X_LAG <null>
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X_LEAD <null>
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X_NTH <null>
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ID 106
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X_LAG <null>
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X_LEAD <null>
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X_NTH <null>
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ID 107
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X_LAG <null>
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X_LEAD <null>
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X_NTH <null>
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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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