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79 lines
2.1 KiB
Python
79 lines
2.1 KiB
Python
#coding:utf-8
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"""
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ID: tabloid.pg-14105
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TITLE: Check ability to compile query with combination of full and right join. Taken from PG bug library.
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DESCRIPTION:
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Original issue ( http://www.postgresql.org/message-id/20160420194758.22924.80319@wrigleys.postgresql.org ):
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===
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create table a as (select 1 as id);
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select *
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from ((
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a as a1
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full join (select 1 as id) as tt
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on (a1.id = tt.id)
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)
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right join (select 1 as id) as tt2
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on (coalesce(tt.id) = tt2.id)
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)
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;
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ERROR: XX000: failed to build any 2-way joins
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LOCATION: standard_join_search, allpaths.c:1832
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It works on PostgreSQL 9.2.13., returning:
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id | id | id
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----+----+----
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1 | 1 | 1
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(1 row)
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===
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PS. NOTE on strange form of COALESCE: "coalesce(tt.id)" - it has only single argument.
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FBTEST: functional.tabloid.pg_14105
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"""
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import pytest
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from firebird.qa import *
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db = db_factory()
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test_script = """
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recreate table a(id int);
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commit;
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insert into a values(1);
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commit;
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set list on;
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select *
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from (
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select a1.id as a1_id, tt.id as tt_id, tt2.id as tt2_id
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from
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(
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a as a1
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full join ( select 1 as id from rdb$database ) as tt
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on ( a1.id = tt.id )
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)
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right join (select 1 as id from rdb$database) as tt2
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-- https://www.drupal.org/node/336712
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-- When used with one argument, it will return NULL if that argument is NULL;
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-- therefore, in such cases, using it is perfectly useless.
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on ( coalesce(tt.id,tt.id) = tt2.id )
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)
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;
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"""
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act = isql_act('db', test_script)
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expected_stdout = """
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A1_ID 1
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TT_ID 1
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TT2_ID 1
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"""
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@pytest.mark.version('>=3.0')
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def test_1(act: Action):
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act.expected_stdout = expected_stdout
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act.execute()
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assert act.clean_stdout == act.clean_expected_stdout
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