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62d1e3bf67
for internal temporary tables: don't use realpath(),
and let them overwrite whatever orphan temp files might've
left in the tmpdir (see main.error_simulation test).
for user created temporary tables: we have to use realpath(),
(see 3a726ab6e2, remember DATA/INDEX DIRECTORY). don't allow
them to overwrite existing files.
This bug was reported by RACK911 LABS
33 lines
918 B
Plaintext
33 lines
918 B
Plaintext
source include/not_windows.inc;
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#
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# MDEV-23569 temporary tables can overwrite existing files
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#
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let datadir=`select @@datadir`;
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create table d1 (a int);
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create temporary table t1 (a int);
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perl;
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chdir "$ENV{MYSQL_TMP_DIR}/mysqld.1/";
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for (<#sql*.MYI>) {
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/^#sql(.*)_([0-9a-f]+_)([0-9a-f]+)\.MYI$/ or die;
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symlink "$ENV{datadir}/test/d1.MYI", sprintf "#sql$1_$2%x.MYI", hex($3)+1;
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symlink "$ENV{datadir}/test/d1.MYI", sprintf "#sql$1_$2%x.MAI", hex($3)+1;
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symlink "$ENV{datadir}/test/d1.MYI", sprintf "#sql$1_$2%x.MAI", hex($3)+2;
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symlink "$ENV{datadir}/test/d1.MYI", "#sql_$1_0.MAI";
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}
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EOF
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error 1,1030;
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create temporary table t2 (a int);
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error 1,1030;
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create temporary table t3 (a int) engine=Aria;
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error 1,1030;
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select * from information_schema.columns where table_schema='test';
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flush tables;
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select * from d1;
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drop temporary table t1;
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remove_files_wildcard $MYSQL_TMP_DIR/mysqld.1 *sql*;
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drop table d1;
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