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112 lines
2.2 KiB
Python
112 lines
2.2 KiB
Python
#coding:utf-8
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"""
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ID: optimizer.inner-join-10
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TITLE: INNER JOIN join order
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DESCRIPTION:
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With a INNER JOIN the relation with the smallest expected result should be the first one
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in process order. The next relation should be the next relation with expected smallest
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result based on previous relation and do on till last relation.
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It is expected that a unique index gives fewer results then non-unique index.
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Thus non-unique indexes will be at the end by determing join order.
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FBTEST: functional.arno.optimizer.opt_inner_join_10
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"""
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import pytest
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from firebird.qa import *
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init_script = """CREATE TABLE Table_50 (
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ID INTEGER NOT NULL
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);
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CREATE TABLE Table_100 (
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ID INTEGER NOT NULL
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);
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CREATE TABLE Table_250 (
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ID INTEGER NOT NULL
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);
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SET TERM ^^ ;
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CREATE PROCEDURE PR_FillTable_50
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AS
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DECLARE VARIABLE FillID INTEGER;
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BEGIN
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FillID = 1;
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WHILE (FillID <= 50) DO
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BEGIN
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INSERT INTO Table_50 (ID) VALUES (:FillID);
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FillID = FillID + 1;
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END
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END
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^^
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CREATE PROCEDURE PR_FillTable_100
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AS
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DECLARE VARIABLE FillID INTEGER;
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BEGIN
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FillID = 1;
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WHILE (FillID <= 100) DO
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BEGIN
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INSERT INTO Table_100 (ID) VALUES (:FillID);
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FillID = FillID + 1;
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END
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END
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^^
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CREATE PROCEDURE PR_FillTable_250
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AS
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DECLARE VARIABLE FillID INTEGER;
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BEGIN
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FillID = 1;
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WHILE (FillID <= 250) DO
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BEGIN
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INSERT INTO Table_250 (ID) VALUES (:FillID);
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FillID = FillID + 1;
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END
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END
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^^
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SET TERM ; ^^
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COMMIT;
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EXECUTE PROCEDURE PR_FillTable_50;
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EXECUTE PROCEDURE PR_FillTable_100;
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EXECUTE PROCEDURE PR_FillTable_250;
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COMMIT;
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CREATE UNIQUE ASC INDEX PK_Table_50 ON Table_50 (ID);
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CREATE UNIQUE ASC INDEX PK_Table_100 ON Table_100 (ID);
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CREATE ASC INDEX I_Table_250 ON Table_250 (ID);
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COMMIT;
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"""
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db = db_factory(init=init_script)
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test_script = """SET PLAN ON;
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SELECT
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Count(*)
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FROM
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Table_50 t50
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JOIN Table_100 t100 ON (t100.ID = t50.ID)
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JOIN Table_250 t250 ON (t250.ID = t100.ID);"""
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act = isql_act('db', test_script, substitutions=[('=.*', '')])
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expected_stdout = """PLAN JOIN (T50 NATURAL, T100 INDEX (PK_TABLE_100), T250 INDEX (I_TABLE_250))
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COUNT
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============
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50
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"""
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@pytest.mark.version('>=3')
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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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