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https://github.com/FirebirdSQL/firebird-qa.git
synced 2025-01-22 13:33:07 +01:00
Added/Updated tests\bugs\gh_7804_test.py: Resultset of cursor that executes using instance of selectable PreparedStatement must be stored in some variable in order to have ability close it EXPLICITLY, before PS will be freed. Otherwise access violation can raises when Python runs garbage collection.
This commit is contained in:
pavel-zotov
parent
d400394ff7
commit
76ed0fa4b9
@ -29,9 +29,19 @@ NOTES:
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More realistic cardinality adjustments for unmatchable booleans, this should also fix #7904: FB5 bad plan for query
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Output for FB 6.x will be changed later (letter from dimitr, 16.12.2023 10:32)
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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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import pytest
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from firebird.qa import *
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from firebird.driver import DatabaseError
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init_script = """
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recreate table test(x smallint);
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@ -51,7 +61,7 @@ act = python_act('db')
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#----------------------------------------------------------
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def replace_leading(source, char="#"):
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def replace_leading(source, char="."):
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stripped = source.lstrip()
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return char * (len(source) - len(stripped)) + stripped
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@ -82,10 +92,19 @@ def test_1(act: Action, capsys):
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result_map = {}
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for x in q_list:
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with cur.prepare(x) as ps:
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ps, rs = None, None
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try:
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ps = cur.prepare(x)
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tabstat1 = [ p for p in con.info.get_table_access_stats() if p.table_id == test_rel_id ]
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cur.execute(x)
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for r in cur:
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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)
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for r in rs:
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pass
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tabstat2 = [ p for p in con.info.get_table_access_stats() if p.table_id == test_rel_id ]
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@ -101,10 +120,21 @@ def test_1(act: Action, capsys):
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tabstat2[0].sequential if tabstat2[0].sequential else 0
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,tabstat2[0].indexed if tabstat2[0].indexed else 0
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)
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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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for k,v in result_map.items():
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print('Query:', k[0])
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print( '\n'.join([replace_leading(s) for s in k[1].split('\n')]) ) # explained plan, with preserving indents by replacing leading spaces with '#'
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# Show explained plan, with preserving indents by replacing leading spaces with '.':
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print( '\n'.join([replace_leading(s) for s in k[1].split('\n')]) )
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print('NR:', v[0])
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print('IR:', v[1])
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print('')
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@ -114,109 +144,109 @@ def test_1(act: Action, capsys):
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expected_fb5x = f"""
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Query: {q_list[0]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap
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################-> Index "TEST_X_ASC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap
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................-> Index "TEST_X_ASC" Range Scan (full match)
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NR: 0
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IR: 1000
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Query: select * from test where x = 3 or x = 2
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap
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####################-> Index "TEST_X_ASC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_ASC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap
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....................-> Index "TEST_X_ASC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_ASC" Range Scan (full match)
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NR: 0
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IR: 2000
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Query: select * from test where x = 2 or x = 3 or x = 1
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap Or
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####################-> Bitmap
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########################-> Index "TEST_X_ASC" Range Scan (full match)
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####################-> Bitmap
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########################-> Index "TEST_X_ASC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_ASC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap Or
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....................-> Bitmap
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........................-> Index "TEST_X_ASC" Range Scan (full match)
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....................-> Bitmap
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........................-> Index "TEST_X_ASC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_ASC" Range Scan (full match)
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NR: 0
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IR: 3000
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Query: select * from test where x = 2 or x is null or x = 3 or x = 1
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap Or
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####################-> Bitmap Or
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########################-> Bitmap
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############################-> Index "TEST_X_ASC" Range Scan (full match)
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########################-> Bitmap
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############################-> Index "TEST_X_ASC" Range Scan (full match)
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####################-> Bitmap
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########################-> Index "TEST_X_ASC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_ASC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap Or
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....................-> Bitmap Or
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........................-> Bitmap
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............................-> Index "TEST_X_ASC" Range Scan (full match)
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........................-> Bitmap
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............................-> Index "TEST_X_ASC" Range Scan (full match)
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....................-> Bitmap
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........................-> Index "TEST_X_ASC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_ASC" Range Scan (full match)
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NR: 0
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IR: 4000
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Query: select * from test where x = 5
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap
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################-> Index "TEST_X_DEC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap
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................-> Index "TEST_X_DEC" Range Scan (full match)
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NR: 0
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IR: 1000
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Query: select * from test where x = 6 or x = 5
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap
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####################-> Index "TEST_X_DEC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_DEC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap
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....................-> Index "TEST_X_DEC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_DEC" Range Scan (full match)
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NR: 0
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IR: 2000
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Query: select * from test where x = 5 or x = 4 or x = 6
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap Or
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####################-> Bitmap
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########################-> Index "TEST_X_DEC" Range Scan (full match)
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####################-> Bitmap
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########################-> Index "TEST_X_DEC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_DEC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap Or
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....................-> Bitmap
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........................-> Index "TEST_X_DEC" Range Scan (full match)
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....................-> Bitmap
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........................-> Index "TEST_X_DEC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_DEC" Range Scan (full match)
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NR: 0
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IR: 3000
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Query: select * from test where x = 6 or x is null or x = 4 or x = 5
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap Or
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####################-> Bitmap Or
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########################-> Bitmap
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############################-> Index "TEST_X_DEC" Range Scan (full match)
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########################-> Bitmap
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############################-> Index "TEST_X_DEC" Range Scan (full match)
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####################-> Bitmap
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########################-> Index "TEST_X_DEC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_DEC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap Or
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....................-> Bitmap Or
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........................-> Bitmap
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............................-> Index "TEST_X_DEC" Range Scan (full match)
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........................-> Bitmap
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............................-> Index "TEST_X_DEC" Range Scan (full match)
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....................-> Bitmap
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........................-> Index "TEST_X_DEC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_DEC" Range Scan (full match)
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NR: 0
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IR: 4000
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"""
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@ -225,91 +255,91 @@ def test_1(act: Action, capsys):
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expected_fb6x = f"""
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Query: {q_list[0]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap
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################-> Index "TEST_X_ASC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap
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................-> Index "TEST_X_ASC" Range Scan (full match)
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NR: 0
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IR: 1000
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Query: {q_list[1]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap
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####################-> Index "TEST_X_ASC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_ASC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap
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....................-> Index "TEST_X_ASC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_ASC" Range Scan (full match)
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NR: 0
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IR: 2000
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Query: {q_list[2]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap Or
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####################-> Bitmap
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########################-> Index "TEST_X_ASC" Range Scan (full match)
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####################-> Bitmap
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########################-> Index "TEST_X_ASC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_ASC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap Or
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....................-> Bitmap
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........................-> Index "TEST_X_ASC" Range Scan (full match)
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....................-> Bitmap
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........................-> Index "TEST_X_ASC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_ASC" Range Scan (full match)
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NR: 0
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IR: 3000
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Query: {q_list[3]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap
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################-> Index "TEST_X_ASC" Full Scan
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap
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................-> Index "TEST_X_ASC" Full Scan
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NR: 0
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IR: 4000
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Query: {q_list[4]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap
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################-> Index "TEST_X_DEC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap
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................-> Index "TEST_X_DEC" Range Scan (full match)
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NR: 0
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IR: 1000
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Query: {q_list[5]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap
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####################-> Index "TEST_X_DEC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_DEC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap
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....................-> Index "TEST_X_DEC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_DEC" Range Scan (full match)
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NR: 0
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IR: 2000
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Query: {q_list[6]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap Or
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################-> Bitmap Or
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####################-> Bitmap
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########################-> Index "TEST_X_DEC" Range Scan (full match)
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####################-> Bitmap
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########################-> Index "TEST_X_DEC" Range Scan (full match)
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################-> Bitmap
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####################-> Index "TEST_X_DEC" Range Scan (full match)
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap Or
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................-> Bitmap Or
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....................-> Bitmap
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........................-> Index "TEST_X_DEC" Range Scan (full match)
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....................-> Bitmap
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........................-> Index "TEST_X_DEC" Range Scan (full match)
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................-> Bitmap
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....................-> Index "TEST_X_DEC" Range Scan (full match)
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NR: 0
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IR: 3000
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Query: {q_list[7]}
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Select Expression
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####-> Filter
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########-> Table "TEST" Access By ID
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############-> Bitmap
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################-> Index "TEST_X_DEC" Full Scan
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....-> Filter
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........-> Table "TEST" Access By ID
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............-> Bitmap
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................-> Index "TEST_X_DEC" Full Scan
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NR: 0
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IR: 4000
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"""
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