#coding:utf-8

"""
ID:          issue-5940
ISSUE:       5940
TITLE:       Allow unused Common Table Expressions
DESCRIPTION:
JIRA:        CORE-5674
FBTEST:      bugs.core_5674
"""

import pytest
from firebird.qa import *

db = db_factory()

test_script = """
    set list on;

    -- Should PASS but two warnings will be issued:
    -- SQL warning code = -104
    -- -CTE "X" is not used in query
    -- -CTE "Y" is not used in query
    with
    x as(
      select 1 i from rdb$database
    )
    ,y as(
      select i from x
    )
    ,z as (
      select 2 z from rdb$database
    )
    select z y, z*2 x from z
    ;


    -- Should PASS but one warning will be issued:
    -- SQL warning code = -104
    -- -CTE "B" is not used in query
    with
    a as(
      select 0 a from rdb$database
    )
    ,b as(
      select 1 x from c rows 1
    )
    ,c as(
      select 2 x from d rows 1
    )
    ,d as(
      select 3 x from e rows 1
    )
    ,e as(
      select a x from a rows 1
    )
    select * from e
    -- union all select * from b
    ;


    -- Should FAIL with:
    -- Statement failed, SQLSTATE = 42S02
    -- Dynamic SQL Error
    -- -SQL error code = -204
    -- -Table unknown
    -- -FOO
    with recursive
    a as(
      select 0 a from rdb$database
      union all
      select a+1 from a where a.a < 1
    )
    ,b as(
      select 1 a from foo rows 1
    )
    ,c as(
      select 2 b from bar rows 1
    )
    select * from a;

    -- Should FAIL with:
    -- Statement failed, SQLSTATE = 42000
    -- Dynamic SQL Error
    -- -SQL error code = -104
    -- -CTE 'C' has cyclic dependencies
    with recursive
    a as(
      select 0 a from rdb$database
      union all
      select a+1 from a where a.a < 1
    )
    ,b as(
      select 1 a from c rows 1
    )
    ,c as(
      select 2 b from b rows 1
    )
    select * from a;


"""

act = isql_act('db', test_script,
               substitutions=[('-At line[:]{0,1}[\\s]+[\\d]+,[\\s]+column[:]{0,1}[\\s]+[\\d]+',
                               '-At line: column:')])

expected_stdout = """
    Y                               2
    X                               4

    X                               0
"""

expected_stderr = """
    SQL warning code = -104
    -CTE "X" is not used in query
    -CTE "Y" is not used in query

    SQL warning code = -104
    -CTE "B" is not used in query
    -CTE "C" is not used in query
    -CTE "D" is not used in query

    Statement failed, SQLSTATE = 42S02
    Dynamic SQL Error
    -SQL error code = -204
    -Table unknown
    -FOO
    -At line: column:

    Statement failed, SQLSTATE = 42000
    Dynamic SQL Error
    -SQL error code = -104
    -CTE 'C' has cyclic dependencies
"""

@pytest.mark.version('>=3.0.3')
def test_1(act: Action):
    act.expected_stdout = expected_stdout
    act.expected_stderr = expected_stderr
    act.execute()
    assert (act.clean_stderr == act.clean_expected_stderr and
            act.clean_stdout == act.clean_expected_stdout)