#
# Bug #19183565 CREATE DYNAMIC INNODB_TMPDIR VARIABLE TO CONTROL
# WHERE INNODB WRITES TEMP FILES
#
# If innodb_tmpdir is NULL or"", temporary file will be created in
# server configuration variable location(--tmpdir)
create table t1(a int primary key)engine=innodb;
show session variables like 'innodb_tmpdir';
Variable_name Value
innodb_tmpdir
alter table t1 add column b int not null; set global innodb_tmpdir=NULL;
connect con1,localhost,root;
show session variables like 'innodb_tmpdir';
Variable_name Value
innodb_tmpdir
alter table t1 add key(b);
connection default;
disconnect con1;
drop table t1;
# innodb_tmpdir with invalid path.
create table t1(a int primary key)engine=innodb; set global innodb_tmpdir='wrong_value'; ERROR42000: Variable 'innodb_tmpdir' can't be set to the value of 'wrong_value'
show warnings;
Level Code Message
Warning 1210 InnoDB: Path doesn't exist. Error1231 Variable 'innodb_tmpdir' can't be set to the value of 'wrong_value'
drop table t1;
# innodb_tmpdir with mysql data directory path.
create table t1(a text, b text, fulltext(a,b))engine=innodb;
insert into t1 values('test1', 'test2');
insert into t1 values('text1', 'text2'); set global innodb_tmpdir = @@global.datadir; ERROR42000: Variable 'innodb_tmpdir' can't be set to the value of 'MYSQL_DATADIR'
show warnings;
Level Code Message
Warning 1210 InnoDB: Path Location should not be same as mysql data directory location. Error1231 DATADIR/data/'
drop table t1;
# innodb_tmpdir with valid location.
create table t1(a text, b text, fulltext(a,b))engine=innodb;
insert into t1 values('test1', 'test2');
insert into t1 values('text1', 'text2'); set @tmpdir = @@global.tmpdir; set global innodb_tmpdir = @tmpdir;
show session variables like 'innodb_tmpdir';
Variable_name Value
innodb_tmpdir
connect con3,localhost,root;
alter table t1 add fulltext(b);
disconnect con3;
connection default; set global innodb_tmpdir=NULL;
drop table t1;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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