#coding:utf-8
#
# id:           bugs.core_5061
# title:        ISQL plan output is unexpectedly truncated after a query is simplified to become shorter
# decription:
#                  Start of discussion: letter to dimitr, 30-dec-2015 13:57; its subject refers to core-4708.
#                  It was found that explained plan produced by ISQL is unexpectedly ends on WI-V3.0.0.32256.
#                  This testuses that query, but instead of verifying plan text itself (which can be changed in the future)
#                  it is sufficient to check only that plan does NOT contain lines with ellipsis or 'truncated' or 'error'.
#                  This mean that 'expected_stdout' section must be EMPTY. Otherwise expected_stdout will contain info
#                  about error or invalid plan.
#
# tracker_id:   CORE-5061
# min_versions: ['3.0']
# versions:     3.0
# qmid:

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

# version: 3.0
# resources: None

substitutions_1 = []

init_script_1 = """"""

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

# test_script_1
#---
#
#  import os
#  import subprocess
#  import time
#
#  sql_text='''    set list on;
#      set explain on;
#      set planonly;
#      set blob all;
#      with recursive
#      r1 as (
#        select 1 as i from rdb$database
#        union all
#        select r.i+1 from r1 r where r.i < 2
#      )
#      --select count(*) from r1;
#
#      ,r2 as (
#        select first 1 row_number() over() i
#        from r1 ra
#        full join r1 rb on rb.i=ra.i
#        group by ra.i
#        having count(*)>0
#
#        union all
#
#        select rx.i+1 from r2 rx
#        where rx.i+1 <= 2
#      )
#      --select count(*) from r2
#      ,r3 as (
#        select first 1 row_number() over() i
#        from r2 ra
#        full join r2 rb on rb.i=ra.i
#        group by ra.i
#        having count(*)>0
#
#        union all
#
#        select rx.i+1 from r3 rx
#        where rx.i+1 <= 2
#      )
#      --select count(*) from r3
#      ,r4 as (
#        select first 1 row_number() over() i
#        from r3 ra
#        full join r3 rb on rb.i=ra.i
#        group by ra.i
#        having count(*)>0
#
#        union all
#
#        select rx.i+1 from r4 rx
#        where rx.i+1 <= 2
#      )
#      ,rn as (
#        select row_number() over() i
#        from rdb$database r full join rdb$database r2 on r2.rdb$relation_id=r.rdb$relation_id
#        group by r.rdb$relation_id
#        having count(*)>0
#        order by r.rdb$relation_id
#        rows 1 to 1
#      )
#      select
#          char_length(mon$explained_plan)
#         ,(select count(*) from r4)
#         ,(select count(*) from rn)
#         --,(select count(*) from rn)
#      from mon$statements
#      ;
#  '''
#
#  sqltxt=open( os.path.join(context['temp_directory'],'tmp_sql_5061.sql'), 'w')
#  sqltxt.write(sql_text)
#  sqltxt.close()
#
#  sqllog=open( os.path.join(context['temp_directory'],'tmp_sql_5061.log'), 'w')
#  subprocess.call( [ context['isql_path'], dsn,'-user',user_name,'-pas',user_password,'-q', '-i', sqltxt.name],
#                   stdout=sqllog,
#                   stderr=subprocess.STDOUT
#                 )
#  sqllog.close()
#
#  # Check content of files: 1st shuld contain name of temply created user, 2nd should be with error during get FB log:
#
#  i=0
#  with open( sqllog.name,'r') as f:
#    for line in f:
#      i+=1
#      if '...' in line or 'truncated' in line or 'error' in line:
#        print("Plan is truncated or empty. Found at line "+str(i))
#        break
#
#  # Do not remove this pause: on Windows closing of handles can take some (small) time.
#  # Otherwise Windows(32) access error can raise here.
#  time.sleep(1)
#
#  if os.path.isfile(sqltxt.name):
#      os.remove(sqltxt.name)
#  if os.path.isfile(sqllog.name):
#      os.remove(sqllog.name)
#
#---

test_script_1 = """
    set list on;
    set explain on;
    set planonly;
    set blob all;
    with recursive
    r1 as (
      select 1 as i from rdb$database
      union all
      select r.i+1 from r1 r where r.i < 2
    )
    --select count(*) from r1;

    ,r2 as (
      select first 1 row_number() over() i
      from r1 ra
      full join r1 rb on rb.i=ra.i
      group by ra.i
      having count(*)>0

      union all

      select rx.i+1 from r2 rx
      where rx.i+1 <= 2
    )
    --select count(*) from r2
    ,r3 as (
      select first 1 row_number() over() i
      from r2 ra
      full join r2 rb on rb.i=ra.i
      group by ra.i
      having count(*)>0

      union all

      select rx.i+1 from r3 rx
      where rx.i+1 <= 2
    )
    --select count(*) from r3
    ,r4 as (
      select first 1 row_number() over() i
      from r3 ra
      full join r3 rb on rb.i=ra.i
      group by ra.i
      having count(*)>0

      union all

      select rx.i+1 from r4 rx
      where rx.i+1 <= 2
    )
    ,rn as (
      select row_number() over() i
      from rdb$database r full join rdb$database r2 on r2.rdb$relation_id=r.rdb$relation_id
      group by r.rdb$relation_id
      having count(*)>0
      order by r.rdb$relation_id
      rows 1 to 1
    )
    select
        char_length(mon$explained_plan)
       ,(select count(*) from r4)
       ,(select count(*) from rn)
       --,(select count(*) from rn)
    from mon$statements
    ;
"""

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


@pytest.mark.version('>=3.0')
def test_1(act_1: Action):
    act_1.execute()
    i = 0
    for line in act_1.stdout.splitlines():
        i += 1
        if '...' in line or 'truncated' in line or 'error' in line:
            pytest.fail(f"Plan is truncated or empty. Found at line {i}")