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ij(CONNECTION1)> --
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements. See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You under the Apache License, Version 2.0
-- (the "License"); you may not use this file except in compliance with
-- the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
autocommit off;
ij(CONNECTION1)> create table foo (a int, b char(250), c char(250), d int);
0 rows inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (1, '1', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (11, '11', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (12, '12', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (13, '13', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (14, '14', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (15, '15', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (16, '16', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (17, '17', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (18, '18', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (11, '111', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (12, '121', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (13, '131', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (14, '141', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (15, '151', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (16, '161', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (17, '171', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (18, '181', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (2, '2', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (3, '3', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (4, '4', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (5, '5', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (6, '6', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (7, '7', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (8, '8', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (9, '9', '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> create index foox on foo (b);
0 rows inserted/updated/deleted
ij(CONNECTION1)> -- normal max optimization, last row in index is not deleted.
select max(b) from foo;
1
--------------------------------------------------------------------------------------------------------------------------------
9 &
ij(CONNECTION1)> -- new max optimization, last row in index is deleted but others on page aren't.
delete from foo where a = 9;
1 row inserted/updated/deleted
ij(CONNECTION1)> select max(b) from foo;
1
--------------------------------------------------------------------------------------------------------------------------------
8 &
ij(CONNECTION1)> -- new max optimization, last row in index is deleted but others on page aren't.
delete from foo where a = 8;
1 row inserted/updated/deleted
ij(CONNECTION1)> select max(b) from foo;
1
--------------------------------------------------------------------------------------------------------------------------------
7 &
ij(CONNECTION1)> -- new max optimization, last row in index is null, real max on last page.
insert into foo values (9, null, '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> select max(b) from foo;
1
--------------------------------------------------------------------------------------------------------------------------------
7 &
ij(CONNECTION1)> -- new max optimization, last is null and deleted, real max on last page.
delete from foo where a > 2;
22 rows inserted/updated/deleted
ij(CONNECTION1)> select max(b) from foo;
1
--------------------------------------------------------------------------------------------------------------------------------
2 &
ij(CONNECTION1)> -- max optimization does not work - fail over to scan, all rows on last page are
-- deleted, except for non-deleted null row on last page. max row on 1st page.
delete from foo where a > 1;
1 row inserted/updated/deleted
ij(CONNECTION1)> insert into foo values (9, null, '1', 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> select max(b) from foo;
1
--------------------------------------------------------------------------------------------------------------------------------
1 &
ij(CONNECTION1)> -- max optimization does not work - fail over to scan, all rows on last page are
-- deleted. non-deleted null row on last page. max row is on 1st page.
delete from foo where a > 1;
1 row inserted/updated/deleted
ij(CONNECTION1)> select max(b) from foo;
1
--------------------------------------------------------------------------------------------------------------------------------
1 &
ij(CONNECTION1)> create table b5772 (a int, b int);
0 rows inserted/updated/deleted
ij(CONNECTION1)> create index b1 on b5772(b);
0 rows inserted/updated/deleted
ij(CONNECTION1)> -- 0 row case
select max(b) from b5772;
1
-----------
NULL
ij(CONNECTION1)> select min(b) from b5772;
1
-----------
NULL
ij(CONNECTION1)> -- 1 row case
insert into b5772 values (1, 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> select max(b) from b5772;
1
-----------
1
ij(CONNECTION1)> select min(b) from b5772;
1
-----------
1
ij(CONNECTION1)> -- 1 null row case
drop table b5772;
0 rows inserted/updated/deleted
ij(CONNECTION1)> create table b5772 (a int, b int);
0 rows inserted/updated/deleted
ij(CONNECTION1)> create index b1 on b5772(b);
0 rows inserted/updated/deleted
ij(CONNECTION1)> insert into b5772 values (2, null);
1 row inserted/updated/deleted
ij(CONNECTION1)> select max(b) from b5772;
1
-----------
NULL
ij(CONNECTION1)> select min(b) from b5772;
1
-----------
NULL
WARNING 01003: Null values were eliminated from the argument of a column function.
ij(CONNECTION1)> -- 1 row plus, one null row.
insert into b5772 values (1, 1);
1 row inserted/updated/deleted
ij(CONNECTION1)> -- cleanup
drop table b5772;
0 rows inserted/updated/deleted
ij(CONNECTION1)> drop table foo;
0 rows inserted/updated/deleted
ij(CONNECTION1)> commit;
ij(CONNECTION1)>
|
