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58 lines
1.4 KiB
Python
58 lines
1.4 KiB
Python
#coding:utf-8
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"""
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ID: issue-2028
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ISSUE: 2028
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TITLE: Correlated subquery is optimized badly if it depends on the union stream
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DESCRIPTION:
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JIRA: CORE-1607
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FBTEST: bugs.core_1607
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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 = """SET PLANONLY ON;
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select 1
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from ( select rdb$relation_name, ( select 1 from rdb$database ) as c from rdb$relations ) r
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where exists ( select * from rdb$relation_fields f where f.rdb$relation_name = r.rdb$relation_name );
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select 1
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from (
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select * from rdb$relations
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union all
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select * from rdb$relations
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) r
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where exists ( select * from rdb$relation_fields f where f.rdb$relation_name = r.rdb$relation_name );
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select ( select first 1 r.rdb$relation_name
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from rdb$relations r
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where r.rdb$relation_id = d.rdb$relation_id - 1 )
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from (
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select * from rdb$database
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union all
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select * from rdb$database
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) d;
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"""
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act = isql_act('db', test_script)
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expected_stdout = """
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PLAN (R RDB$DATABASE NATURAL)
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PLAN (F INDEX (RDB$INDEX_4))
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PLAN (R RDB$RELATIONS NATURAL)
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PLAN (F INDEX (RDB$INDEX_4))
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PLAN (R RDB$RELATIONS NATURAL, R RDB$RELATIONS NATURAL)
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PLAN (R INDEX (RDB$INDEX_1))
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PLAN (D RDB$DATABASE NATURAL, D RDB$DATABASE NATURAL)
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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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