firebird-qa/tests/bugs/core_3554_test.py

#coding:utf-8
#
# id:           bugs.core_3554
# title:        Server crashes during prepare or throws incorrect parsing error if the remotely passed SQL query is empty
# decription:   
#                   Checked on:
#                      4.0.0.1635 SS: 1.364s.
#                      4.0.0.1633 CS: 1.674s.
#                      3.0.5.33180 SS: 0.822s.
#                      3.0.5.33178 CS: 1.233s.
#                
# tracker_id:   CORE-3554
# min_versions: ['3.0']
# versions:     3.0
# qmid:         None

import pytest
from firebird.qa import db_factory, isql_act, Action

# version: 3.0
# resources: None

substitutions_1 = [('Data source : Firebird::localhost:.*', 'Data source : Firebird::localhost:'), ('.*Unexpected end of command.*', '.*Unexpected end of command'), ('-At block line: [\\d]+, col: [\\d]+', '-At block line')]

init_script_1 = """"""

db_1 = db_factory(sql_dialect=3, init=init_script_1)

test_script_1 = """
    -- See issues in ticket:
    -- "application either passes the empty SQL text to prepare, or passes a "too long" SQL text (64KB or 128KB etc)
    -- so its length becomes zero as a result of conversion into USHORT (unsigned 16-bit integer) which represents
    -- the supported SQL text length."
    -- Test was made only for 3.0 because 2.5 allows to pass in ES much longer string than 32K.

    -- 30.07.2015: at least since build #31948 first ES (which passes literal of length = 32766 bytes) no more fails.
    -- Previous expected std_err:
    -- Statement failed, SQLSTATE = 42000
    -- Dynamic SQL Error
    -- -SQL error code = -104
    -- -String literal with 32766 bytes exceeds the maximum length of 32765 bytes
    -- has been removed.
    -- Also, std_err has been changed for 2nd ES (which passes empty literal). Was:
    -- Statement failed, SQLSTATE = 42000
    -- Execute statement error at isc_dsql_prepare :
    -- 335544608 : Unexpected end of command
    -- Statement : 
    -- Data source : Firebird::localhost:C:\\FBTESTING\\QA\\FBT-REPO\\TMP\\E30.FDB

    set list on;
    set term ^;
    execute block returns(n int) as
    declare b blob;
    begin
      -- Try to pass statement with total char length (including delimiters, `select` and `from rdb$database`) = 32766 bytes.
      -- This should raise exception in 3.0:
      execute statement 'select ''1qwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwertyqwer
      on external ('localhost:'||rdb$get_context('SYSTEM','DB_NAME')) as user 'sysdba' password 'masterkey' role 'R2'
      into b;
    
      n = octet_length(b);
      suspend;
    end
    ^
    
    execute block returns(n int) as
    begin
      -- Try to pass empty statement. This should raise exception, but server must not crach:
      execute statement ''
      on external ('localhost:'||rdb$get_context('SYSTEM','DB_NAME')) as user 'sysdba' password 'masterkey' role 'R2'
      ;
    end
    ^
    set term ;^
    commit;

    --                                    ||||||||||||||||||||||||||||
    -- ###################################|||  FB 4.0+, SS and SC  |||##############################
    --                                    ||||||||||||||||||||||||||||
    -- If we check SS or SC and ExtConnPoolLifeTime > 0 (config parameter FB 4.0+) then current
    -- DB (bugs.core_NNNN.fdb) will be 'captured' by firebird.exe process and fbt_run utility
    -- will not able to drop this database at the final point of test.
    -- Moreover, DB file will be hold until all activity in firebird.exe completed and AFTER this
    -- we have to wait for <ExtConnPoolLifeTime> seconds after it (discussion and small test see
    -- in the letter to hvlad and dimitr 13.10.2019 11:10).
    -- This means that one need to kill all connections to prevent from exception on cleanup phase:
    -- SQLCODE: -901 / lock time-out on wait transaction / object <this_test_DB> is in use
    -- #############################################################################################
    delete from mon$attachments where mon$attachment_id != current_connection;
    commit;    

  """

act_1 = isql_act('db_1', test_script_1, substitutions=substitutions_1)

expected_stdout_1 = """
    N                               32739
  """
expected_stderr_1 = """
    Statement failed, SQLSTATE = 42000
    Execute statement error at isc_dsql_prepare :
    335544569 : Dynamic SQL Error
    335544436 : SQL error code = -104
    335544851 : Unexpected end of command - line 1, column 1
    Statement : 
    Data source : Firebird::localhost:C:\\MIXirebird\\QAbt-repo	mp\\E30.FDB
    -At block line: 4, col: 7
  """

@pytest.mark.version('>=3.0')
def test_1(act_1: Action):
    act_1.expected_stdout = expected_stdout_1
    act_1.expected_stderr = expected_stderr_1
    act_1.execute()
    assert act_1.clean_expected_stderr == act_1.clean_stderr
    assert act_1.clean_expected_stdout == act_1.clean_stdout