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MDEV-14378 In ALGORITHM=INPLACE, use a common name for the intermediate tables or partitions

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Allow DROP TABLE `#mysql50##sql-...._.` to drop tables that were
being rebuilt by ALGORITHM=INPLACE

NOTE: If the server is killed after the table-rebuilding ALGORITHM=INPLACE
commits inside InnoDB but before the .frm file has been replaced, then
the recovery will involve something else than DROP TABLE.

NOTE: If the server is killed in a true inplace ALTER TABLE commits
inside InnoDB but before the .frm file has been replaced, then we
are really out of luck. To properly handle that situation, we would
need a transactional mysql.ddl_fixup table that directs recovery to
rename or remove files.

prepare_inplace_alter_table_dict(): Use the altered_table->s->table_name
for generating the new_table_name.

table_name_t::part_suffix: The start of the partition name suffix.

table_name_t::dbend(): Return the end of the schema name.

table_name_t::dblen(): Return the length of the schema name, in bytes.

table_name_t::basename(): Return the name without the schema name.

table_name_t::part(): Return the partition name, or NULL if none.

row_drop_table_for_mysql(): Assert for #sql, not #sql-ib.
This commit is contained in:
Marko Mäkelä
2017-11-11 22:27:03 +02:00
parent a48aa0cd56
commit e94c9d24f6
8 changed files with 70 additions and 67 deletions
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16
mysql-test/suite/innodb/r/innodb-alter-tempfile.result
View File

@ -4,17 +4,10 @@
# Temporary tablename will be unique. This makes sure that future
# in-place ALTERs of the same table will not be blocked due to
# temporary tablename.
# Crash the server in ha_innobase::commit_inplace_alter_table()
CREATE TABLE t1 (f1 INT NOT NULL, f2 INT NOT NULL) ENGINE=innodb;
SET debug='d,innodb_alter_commit_crash_before_commit';
Warnings:
Warning 1287 '@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
# Write file to make mysql-test-run.pl expect crash
# Execute the statement that causes the crash
SET debug_dbug='+d,innodb_alter_commit_crash_before_commit';
ALTER TABLE t1 ADD PRIMARY KEY (f2, f1);
ERROR HY000: Lost connection to MySQL server during query
# Startup the server after the crash
# Read and remember the temporary table name
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
@ -23,13 +16,6 @@ t1 CREATE TABLE `t1` (
) ENGINE=InnoDB DEFAULT CHARSET=latin1
# Consecutive Alter table does not create same temporary file name
ALTER TABLE t1 ADD PRIMARY KEY (f2, f1);
# Shutdown the server to allow manual recovery
# Manual recovery begin. The dictionary was not updated
# and the files were not renamed. The rebuilt table
# was left behind on purpose, to faciliate data recovery.
# Manual recovery end
# Startup the server after manual recovery
# Drop the orphaned rebuilt table.
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (