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Code Activity

MDEV-19713 Remove big_tables system variable

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mark big_tables deprecated, the server can put temp tables on disk
as needed avoiding "table full" errors.

in case someone would really need to force a tmp table to be created
on disk from the start and for testing allow tmp_memory_table_size
to be set to 0.

fix tests to use that instead (and add a test that it actually
works).

make sure in-memory TREE size limit is never 0 (it's [ab]using
tmp_memory_table_size at the moment)

remove few sys_vars.*_basic tests
This commit is contained in:
Sergei Golubchik
2019-09-18 14:17:26 +02:00
parent de9ef03ae6
commit cd41ffe1f1
47 changed files with 453 additions and 1155 deletions
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8
mysql-test/main/select.test
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@ -1425,9 +1425,9 @@ drop table tmp;
# big table done
SET BIG_TABLES=1;
set tmp_memory_table_size=0; # force on-disk tmp table
select distinct concat(fld3," ",fld3) as namn from t2,t3 where t2.fld1=t3.t2nr order by namn limit 10;
SET BIG_TABLES=0;
set tmp_memory_table_size=default;
select distinct concat(fld3," ",fld3) from t2,t3 where t2.fld1=t3.t2nr order by fld3 limit 10;
select distinct fld5 from t2 limit 10;
@ -1436,9 +1436,9 @@ select distinct fld5 from t2 limit 10;
#
select distinct fld3,count(*) from t2 group by companynr,fld3 limit 10;
SET BIG_TABLES=1; # Force use of MyISAM
set tmp_memory_table_size=0; # force on-disk tmp table
select distinct fld3,count(*) from t2 group by companynr,fld3 limit 10;
SET BIG_TABLES=0;
set tmp_memory_table_size=default;
select distinct fld3,repeat("a",length(fld3)),count(*) from t2 group by companynr,fld3 limit 100,10;
#