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103 lines
3.2 KiB
Python
103 lines
3.2 KiB
Python
#coding:utf-8
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#
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# id: bugs.core_1389
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# title: Indexed MIN/MAX aggregates produce three index reads instead of the expected one indexed read
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# decription:
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# We use API call db_info(fdb.isc_info_read_idx_count) for obtaining number of indexed reads and
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# extract their values which are reported per table and are cumulative since start of attachment.
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# Four statements are used for analyzing (table have all needed indexes):
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# * select max(x) from ...;
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# * select x from ... order by x asc rows 1;
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# * select min(y) from ...;
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# * select y from ... order by y desc rows 1;
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#
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# All of them must take only one indexed read.
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#
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# Info about 'isc_info_read_idx_count':
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# Number of indexed database reads <...>
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# Reported per table.
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# Calculated since the current database attachment started // CUMULATIVE!
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#
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# See also:
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# http://pythonhosted.org/fdb/reference.html#fdb.Connection.database_info
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#
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# Confirmed bug on WI-V2.0.0.12724: db_info() received 3 (three) indexed reads instead of 1 for queries:
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# 'select min(...) from ...' and 'select max(...) from ...'
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#
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# tracker_id: CORE-1389
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# min_versions: ['2.5.0']
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# versions: 2.5
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# qmid: None
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import pytest
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from firebird.qa import db_factory, isql_act, Action
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# version: 2.5
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# resources: None
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substitutions_1 = []
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init_script_1 = """
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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)
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select -1, 1 from (select 1 i from rdb$types rows 200) a, (select 1 i from rdb$types rows 200) b;
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commit;
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create index test_x on test(x);
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create descending index test_y on test(y);
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commit;
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"""
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db_1 = db_factory(sql_dialect=3, init=init_script_1)
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# test_script_1
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#---
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# import fdb
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# sql_get_rel_id="select rdb$relation_id from rdb$relations where trim(rdb$relation_name)=upper('test')"
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#
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# cur=db_conn.cursor()
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# cur.execute(sql_get_rel_id)
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#
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# test_rel=-1
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# for r in cur:
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# test_rel=r[0]
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#
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# sql_set=[
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# 'select min(x) from test',
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# 'select x from test order by x rows 1',
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# 'select max(y) from test',
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# 'select y from test order by y desc rows 1'
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# ]
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#
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# v_previous_idx_counter=0
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# for i in range(0,len(sql_set)):
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# cur.execute(sql_set[i])
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# for r in cur:
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# y=r[0]
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#
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# info = db_conn.db_info(fdb.isc_info_read_idx_count)
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# # WI-V2.0.0.12724
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# for k,v_cumulative_idx_counter in info.items():
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# if k == test_rel:
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# print( 'Number of indexed reads: ' + str(v_cumulative_idx_counter - v_previous_idx_counter) )
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# v_previous_idx_counter = v_cumulative_idx_counter
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# cur.close()
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#
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#---
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#act_1 = python_act('db_1', test_script_1, substitutions=substitutions_1)
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expected_stdout_1 = """
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Number of indexed reads: 1
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Number of indexed reads: 1
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Number of indexed reads: 1
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Number of indexed reads: 1
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"""
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@pytest.mark.version('>=2.5')
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@pytest.mark.xfail
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def test_1(db_1):
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pytest.fail("Test not IMPLEMENTED")
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