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69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
#coding:utf-8
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"""
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ID: issue-1734
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ISSUE: 1734
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TITLE: Data type unknown
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DESCRIPTION:
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JIRA: CORE-1315
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NOTES:
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[18.01.2025] pzotov
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Resultset of cursor that executes using instance of selectable PreparedStatement must be stored
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in some variable in order to have ability close it EXPLICITLY (before PS will be freed).
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Otherwise access violation raises during Python GC and pytest hangs at final point (does not return control to OS).
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This occurs at least for: Python 3.11.2 / pytest: 7.4.4 / firebird.driver: 1.10.6 / Firebird.Qa: 0.19.3
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The reason of that was explained by Vlad, 26.10.24 17:42 ("oddities when use instances of selective statements").
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"""
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from firebird.driver import DatabaseError
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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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act = python_act('db')
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expected_stdout = """
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COALESCE
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-----------
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2
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COALESCE
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-----------
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1
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"""
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@pytest.mark.version('>=3')
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def test_1(act: Action, capsys):
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with act.db.connect() as con:
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cur = con.cursor()
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ps, rs = None, None
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try:
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ps = cur.prepare('select coalesce(?,1) from RDB$DATABASE')
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# ::: NB ::: 'ps' returns data, i.e. this is SELECTABLE expression.
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# We have to store result of cur.execute(<psInstance>) in order to
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# close it explicitly.
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# Otherwise AV can occur during Python garbage collection and this
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# causes pytest to hang on its final point.
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# Explained by hvlad, email 26.10.24 17:42
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rs = cur.execute(ps,[2])
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act.print_data(rs)
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rs = cur.execute(ps,[None])
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act.print_data(rs)
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except DatabaseError as e:
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print( e.__str__() )
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print(e.gds_codes)
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finally:
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if rs:
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rs.close() # <<< EXPLICITLY CLOSING CURSOR RESULTS
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if ps:
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ps.free()
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act.stdout = capsys.readouterr().out
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act.expected_stdout = expected_stdout
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assert act.clean_stdout == act.clean_expected_stdout
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