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Added/Updated tests\bugs\gh_8104_test.py: C:\FBTESTING\qa\firebird-qa\git-commit-adjust-output.bat gh_8104_test.py added description

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pavel-zotov 2024-05-09 13:02:08 +03:00
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tests/bugs/gh_8104_test.py
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@ -5,9 +5,21 @@ ID: issue-8104
ISSUE: https://github.com/FirebirdSQL/firebird/issues/8104
TITLE: Inefficient evaluation of expressions like rdb$db_key <= ? after mass delete
DESCRIPTION:
Test does actions described in the ticket but operates with first PP of table instead of 20th
(see variable 'chk_pp').
Following query is performed two times (see variable 'read_records_for_chk_pp'):
=========
select ...
from t1
where
rdb$db_key >= make_dbkey({rel_id}, 0, 0, {chk_pp})
and rdb$db_key < make_dbkey({rel_id}, 0, 0, {chk_pp+1})
=========
We compare number of fetches in this query before and after bulk deletion ('fetches_1', 'fetches_2').
Value 'fetches_2' must be LESS than 'fetches_1' (before fix it was much greater).
NOTES:
[08.05.2024] pzotov
Confirmed problem on 6.0.0.344, 5.0.1.1394, 4.0.5.3091 (request #1: 47643; request #2: 115943).
Confirmed problem on 6.0.0.344, 5.0.1.1394, 4.0.5.3091 (fetches in request #1: 47643; in request #2: 115943).
Checked on 6.0.0.345, 5.0.1.1395, 4.0.5.3092 (fetches in req #2 LESS than in req #1).
"""