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Bug#38005 Partitions: error with insert select.

Browse Source 
MyISAM blocks index usage for bulk insert into zero-records tables.
See ha_myisam::start_bulk_insert() lines from
...
    if (file->state->records == 0 ...
...

That causes problems for partition engine when some partitions have records some not
as the engine uses same access method for all partitions.

Now partition engine doesn't call index_first/index_last
for empty tables.

per-file comments:
  mysql-test/r/partition.result
        Bug#38005 Partitions: error with insert select.
        test result

  mysql-test/t/partition.test
        Bug#38005 Partitions: error with insert select.
        test case

  sql/ha_partition.cc
        Bug#38005 Partitions: error with insert select.
        ha_engine::index_first and
        ha_engine::index_last not called for empty tables.
This commit is contained in:
Alexey Botchkov
2008-10-06 18:14:20 +05:00
parent a66e58daee
commit afbb52c43c
3 changed files with 152 additions and 0 deletions
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70
mysql-test/r/partition.result
View File

@ -1637,4 +1637,74 @@ select count(*) from t1, t2 where t1.createdDate = t2.createdDate;
count(*)
1
drop table t1, t2;
create table t1 (s1 int) partition by hash(s1) partitions 2;
create index i on t1 (s1);
insert into t1 values (1);
insert into t1 select s1 from t1;
insert into t1 select s1 from t1;
insert into t1 select s1 from t1 order by s1 desc;
select * from t1;
s1
1
1
1
1
1
1
1
1
drop table t1;
create table t1 (s1 int) partition by range(s1)
(partition pa1 values less than (10),
partition pa2 values less than MAXVALUE);
create index i on t1 (s1);
insert into t1 values (1);
insert into t1 select s1 from t1;
insert into t1 select s1 from t1;
insert into t1 select s1 from t1 order by s1 desc;
select * from t1;
s1
1
1
1
1
1
1
1
1
drop table t1;
create table t1 (s1 int) partition by range(s1)
(partition pa1 values less than (10),
partition pa2 values less than MAXVALUE);
create index i on t1 (s1);
insert into t1 values (20);
insert into t1 select s1 from t1;
insert into t1 select s1 from t1;
insert into t1 select s1 from t1 order by s1 desc;
select * from t1;
s1
20
20
20
20
20
20
20
20
drop table t1;
create table t1 (s1 int) partition by range(s1)
(partition pa1 values less than (10),
partition pa2 values less than MAXVALUE);
create index i on t1 (s1);
insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8);
insert into t1 select s1 from t1;
insert into t1 select s1 from t1;
insert into t1 select s1 from t1;
insert into t1 select s1 from t1;
insert into t1 select s1 from t1 order by s1 desc;
insert into t1 select s1 from t1 where s1=3;
select count(*) from t1;
count(*)
288
drop table t1;
End of 5.1 tests