mirror of
https://github.com/FirebirdSQL/firebird-qa.git
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174 lines
4.9 KiB
Python
174 lines
4.9 KiB
Python
#coding:utf-8
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#
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# id: bugs.core_3959
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# title: Repeat Temporary Table access from ReadOnly Transaction and ReadWrite transaction causes Internal Firebird consistency check (cannot find record back version (291), file: vio.cpp line: 4905)
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# decription:
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# Bug in WI-V2.5.1.26351: execution of last line ('print( cur1a.fetchall() )') leads FB to crash, log:
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# ===
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# Access violation.
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# The code attempted to access a virtual
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# address without privilege to do so.
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# This exception will cause the Firebird server
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# to terminate abnormally.
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# ===
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# No problem in 2.5.7 and 3.0.x
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#
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# tracker_id: CORE-3959
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# min_versions: ['2.5.7']
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# versions: 2.5.7
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# qmid: None
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import pytest
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from firebird.qa import db_factory, python_act, Action
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from firebird.driver import TPB, TraAccessMode, Isolation
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# version: 2.5.7
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# resources: None
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substitutions_1 = []
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init_script_1 = """
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create or alter procedure fu_x1 as begin end;
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create or alter procedure save_x1 as begin end;
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commit;
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recreate global temporary table x1 (
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id integer,
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name varchar(10)
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) on commit preserve rows;
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set term ^;
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alter procedure fu_x1 returns (
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sid integer,
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sname varchar(10)) as
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begin
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delete from x1;
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insert into x1 values (1,'1');
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insert into x1 values (2,'2');
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insert into x1 values (3,'3');
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insert into x1 values (4,'4');
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insert into x1 values (5,'5');
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for
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select x1.id, x1.name
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from x1
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into sid, sname
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do
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suspend;
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end
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^
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alter procedure save_x1 (
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pid integer,
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pname varchar(10))
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as
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begin
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update x1 set name = :pname
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where x1.id = :pid;
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if (row_count = 0) then
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insert into x1 values( :pid, :pname);
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end
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^
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set term ;^
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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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#
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# import os
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# import fdb
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# os.environ["ISC_USER"] = 'SYSDBA'
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# os.environ["ISC_PASSWORD"] = 'masterkey'
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#
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# db_conn.close()
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#
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# txparam1 = ( [ fdb.isc_tpb_read_committed, fdb.isc_tpb_rec_version, fdb.isc_tpb_nowait, fdb.isc_tpb_read ] )
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# txparam2 = ( [ fdb.isc_tpb_read_committed, fdb.isc_tpb_rec_version, fdb.isc_tpb_nowait ] )
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#
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# con1 = fdb.connect(dsn=dsn)
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# #print(con1.firebird_version)
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#
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# print('step-1')
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# tx1a=con1.trans( default_tpb = txparam1 )
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# print('step-2')
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# cur1a = tx1a.cursor()
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#
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# print('step-3')
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# cur1a.execute("select sid, sname from FU_X1")
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# print('step-4')
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#
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# tx1b=con1.trans( default_tpb = txparam2 )
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#
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# print('step-5')
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# cur1b = tx1b.cursor()
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# print('step-6')
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# cur1b.callproc("save_x1", ('2', 'foo'))
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#
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# print('step-7')
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# tx1b.commit()
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#
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# #cur1b.callproc("save_x1", (3, 'bar'))
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# #tx1b.commit()
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#
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# print('step-8')
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# cur1a.execute("select sid, sname from FU_X1")
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# print('step-9')
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# print( cur1a.fetchall() )
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#
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# '''
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# Output in 2.5.1:
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# step-1
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# ...
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# step-9
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# Traceback (most recent call last):
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# File "c3959-run.py", line 42, in <module>
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# print( cur1a.fetchall() )
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# File "C:\\Python27\\lib\\site-packages
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# db
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# bcore.py", line 3677, in fetchall
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# return [row for row in self]
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# File "C:\\Python27\\lib\\site-packages
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# db
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# bcore.py", line 3440, in next
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# row = self.fetchone()
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# File "C:\\Python27\\lib\\site-packages
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# db
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# bcore.py", line 3637, in fetchone
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# return self._ps._fetchone()
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# File "C:\\Python27\\lib\\site-packages
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# db
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# bcore.py", line 3325, in _fetchone
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# "Cursor.fetchone:")
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# fdb.fbcore.DatabaseError: ('Cursor.fetchone:
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# - SQLCODE: -902
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# - Unable to complete network request to host "localhost".
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# - Error reading data from the connection.', -902, 335544721)
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# '''
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#
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#---
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act_1 = python_act('db_1', substitutions=substitutions_1)
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@pytest.mark.version('>=2.5.7')
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def test_1(act_1: Action):
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with act_1.db.connect() as con:
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txparam_read = TPB(isolation=Isolation.READ_COMMITTED_RECORD_VERSION, lock_timeout=0,
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access_mode=TraAccessMode.READ).get_buffer()
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txparam_write = TPB(isolation=Isolation.READ_COMMITTED_RECORD_VERSION, lock_timeout=0).get_buffer()
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tx_read = con.transaction_manager(txparam_read)
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cur_read = tx_read.cursor()
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cur_read.execute("select sid, sname from FU_X1")
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tx_write = con.transaction_manager(txparam_write)
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cur_write = tx_write.cursor()
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cur_write.callproc("save_x1", ['2', 'foo'])
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tx_write.commit()
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cur_read.execute("select sid, sname from FU_X1")
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cur_read.fetchall() # If this does not raises an exception, the test passes
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