Recording test results according to MDEV-29446 changes:
mysql-test/suite/galera/r/galera_rsu_wsrep_desync.result
mysql-test/suite/galera/r/galera_sync_wait_show.result
mysql-test/suite/galera/r/lp1376747-4.result
mysql-test/suite/s3/replication_partition.result
mysql-test/suite/s3/replication_stmt.result
Other things:
- Don't allocate an IO_CACHE for scanning tables of type BLOCK
(It was never used in this case)
- Fixed bug in page cache that cased a hang when trying to read a
not existing S3 block.
We cannot revert the ALTER, so anything happening after
the point of no return should not be treated as an error. A
very unfortunate condition that a user needs to be warned about - yes,
but we cannot say "ALTER TABLE has failed" if the table was successfully
altered.
MDEV-25604 Atomic DDL: Binlog event written upon recovery does not
have default database
The purpose of this task is to ensure that ALTER TABLE is atomic even if
the MariaDB server would be killed at any point of the alter table.
This means that either the ALTER TABLE succeeds (including that triggers,
the status tables and the binary log are updated) or things should be
reverted to their original state.
If the server crashes before the new version is fully up to date and
commited, it will revert to the original table and remove all
temporary files and tables.
If the new version is commited, crash recovery will use the new version,
and update triggers, the status tables and the binary log.
The one execption is ALTER TABLE .. RENAME .. where no changes are done
to table definition. This one will work as RENAME and roll back unless
the whole statement completed, including updating the binary log (if
enabled).
Other changes:
- Added handlerton->check_version() function to allow the ddl recovery
code to check, in case of inplace alter table, if the table in the
storage engine is of the new or old version.
- Added handler->table_version() so that an engine can report the current
version of the table. This should be changed each time the table
definition changes.
- Added ha_signal_ddl_recovery_done() and
handlerton::signal_ddl_recovery_done() to inform all handlers when
ddl recovery has been done. (Needed by InnoDB).
- Added handlerton call inplace_alter_table_committed, to signal engine
that ddl_log has been closed for the alter table query.
- Added new handerton flag
HTON_REQUIRES_NOTIFY_TABLEDEF_CHANGED_AFTER_COMMIT to signal when we
should call hton->notify_tabledef_changed() during
mysql_inplace_alter_table. This was required as MyRocks and InnoDB
needed the call at different times.
- Added function server_uuid_value() to be able to generate a temporary
xid when ddl recovery writes the query to the binary log. This is
needed to be able to handle crashes during ddl log recovery.
- Moved freeing of the frm definition to end of mysql_alter_table() to
remove duplicate code and have a common exit strategy.
-------
InnoDB part of atomic ALTER TABLE
(Implemented by Marko Mäkelä)
innodb_check_version(): Compare the saved dict_table_t::def_trx_id
to determine whether an ALTER TABLE operation was committed.
We must correctly recover dict_table_t::def_trx_id for this to work.
Before purge removes any trace of DB_TRX_ID from system tables, it
will make an effort to load the user table into the cache, so that
the dict_table_t::def_trx_id can be recovered.
ha_innobase::table_version(): return garbage, or the trx_id that would
be used for committing an ALTER TABLE operation.
In InnoDB, table names starting with #sql-ib will remain special:
they will be dropped on startup. This may be revisited later in
MDEV-18518 when we implement proper undo logging and rollback
for creating or dropping multiple tables in a transaction.
Table names starting with #sql will retain some special meaning:
dict_table_t::parse_name() will not consider such names for
MDL acquisition, and dict_table_rename_in_cache() will treat such
names specially when handling FOREIGN KEY constraints.
Simplify InnoDB DROP INDEX.
Prevent purge wakeup
To ensure that dict_table_t::def_trx_id will be recovered correctly
in case the server is killed before ddl_log_complete(), we will block
the purge of any history in SYS_TABLES, SYS_INDEXES, SYS_COLUMNS
between ha_innobase::commit_inplace_alter_table(commit=true)
(purge_sys.stop_SYS()) and purge_sys.resume_SYS().
The completion callback purge_sys.resume_SYS() must be between
ddl_log_complete() and MDL release.
--------
MyRocks support for atomic ALTER TABLE
(Implemented by Sergui Petrunia)
Implement these SE API functions:
- ha_rocksdb::table_version()
- hton->check_version = rocksdb_check_versionMyRocks data dictionary
now stores table version for each table.
(Absence of table version record is interpreted as table_version=0,
that is, which means no upgrade changes are needed)
- For inplace alter table of a partitioned table, call the underlying
handlerton when checking if the table is ok. This assumes that the
partition engine commits all changes at once.
This feature adds the functionality of ignorability for indexes.
Indexes are not ignored be default.
To control index ignorability explicitly for a new index,
use IGNORE or NOT IGNORE as part of the index definition for
CREATE TABLE, CREATE INDEX, or ALTER TABLE.
Primary keys (explicit or implicit) cannot be made ignorable.
The table INFORMATION_SCHEMA.STATISTICS get a new column named IGNORED that
would store whether an index needs to be ignored or not.
A few of the failures was because of missing sync_slave_to_master in
the test suite.
However, the biggest reason for most faulures was that in case of
ALTER PARTITION the master writes the query to the binary log before
it has updated the .frm and .par files. This causes a problem for an
S3 slave as it will start execute the ALTER PARTITION but get old .frm and
.par files from S3 which causes "open table" to fail, either with an error
or in some case with a crash.
Fixed
Move the S3 test case variables to suite.pm to use environment variables.
Use minio credentials if a TCP connection to localhost:9000 is accepted
so the current build works corrected.
Reviewer: Daniel Black
closes#1711
..causes error on slave.
Cause: if the master doesn't have the frm file for the table,
DROP TABLE code will call ha_delete_table_force() to drop the table
in all available storage engines.
The issue was that this code path didn't check for
HTON_TABLE_MAY_NOT_EXIST_ON_SLAVE flag for the storage engine,
and so did not add "... IF EXISTS" to the statement that's written
to the binary log. This can cause error on the slave when it tries to
drop a table that's already gone.
This failure was caused because of several bugs:
- Someone had removed s3-slave-ignore-updates=1 from slave.cnf, which
caused the slave to remove files that the master was working on.
- Bug in ha_partition::change_partitions() that didn't reset m_new_file
in case of errors. This caused crashes in ha_maria::extra() as the
maria handler was called on files that was already closed.
- In ma_pagecache there was a bug that when one got a read error one a
big block (s3 block), it left the flag PCBLOCK_BIG_READ on for the page
which cased an assert when the page where flushed.
- Flush all cached tables in case of ignored ALTER TABLE
Note that when merging code from 10.3, that fixes the partition bug, use
the code from this patch instead.
Changes to ma_pagecache.cc written or reviewed by Sanja
This commit fixed the problems with S3 after the "DROP TABLE FORCE" changes.
It also fixes all failing replication S3 tests.
A slave is delayed if it is trying to execute replicated queries on a
table that is already converted to S3 by the master later in the binlog.
Fixes for replication events on S3 tables for delayed slaves:
- INSERT and INSERT ... SELECT and CREATE TABLE are ignored but written
to the binary log. UPDATE & DELETE will be fixed in a future commit.
Other things:
- On slaves with --s3-slave-ignore-updates set, allow S3 tables to be
opened in read-write mode. This was done to be able to
ignore-but-replicate queries like insert. Without this change any
open of an S3 table failed with 'Table is read only' which is too
early to be able to replicate the original query.
- Errors are now printed if handler::extra() call fails in
wait_while_tables_are_used().
- Error message for row changes are changed from HA_ERR_WRONG_COMMAND
to HA_ERR_TABLE_READONLY.
- Disable some maria_extra() calls for S3 tables. This could cause
S3 tables to fail in some cases.
- Added missing thr_lock_delete() to ma_open() in case of failure.
- Removed from mysql_prepare_insert() the not needed argument 'table'.
Temporarily disable failing S3 tests to allow the suite to run in buildbot:
s3.partition and s3.partition_move are disabled due to MDEV-23648.
While the problem is supposedly generic, the tests don't fail with Amazon
setup, so they are disabled conditionally for emulator (MinIO).
s3.replication_partition is disabled due to MDEV-23730,
it fails both with Amazon and MinIO.
s3.replication_mixed and s3.replication_stmt are disabled due to MDEV-23770,
they also fail both with Amazon and the emulator.
* use the environment variable HA_S3_SO, not a literal ha_s3 in cnf files
* make ConfigFactory to support empty option values
* update no_s3.result after MDEV-11412
When converting a table (test.s3_table) from S3 to another engine, the
following will be logged to the binary log:
DROP TABLE IF EXISTS test.t1;
CREATE OR REPLACE TABLE test.t1 (...) ENGINE=new_engine
INSERT rows to test.t1 in binary-row-log-format
The bug is that the above statements are logged one by one to the binary
log. This means that a fast slave, configured to use the same S3 storage
as the master, would be able to execute the DROP and CREATE from the
binary log before the master has finished the ALTER TABLE.
In this case the slave would ignore the DROP (as it's on a S3 table) but
it will stop on CREATE of the local tale, as the table is still exists in
S3. The REPLACE part will be ignored by the slave as it can't touch the
S3 table.
The fix is to ensure that all the above statements is written to binary
log AFTER the table has been deleted from S3.
MDEV-22088 S3 partitioning support
All ALTER PARTITION commands should now work on S3 tables except
REBUILD PARTITION
TRUNCATE PARTITION
REORGANIZE PARTITION
In addition, PARTIONED S3 TABLES can also be replicated.
This is achived by storing the partition tables .frm and .par file on S3
for partitioned shared (S3) tables.
The discovery methods are enchanced by allowing engines that supports
discovery to also support of the partitioned tables .frm and .par file
Things in more detail
- The .frm and .par files of partitioned tables are stored in S3 and kept
in sync.
- Added hton callback create_partitioning_metadata to inform handler
that metadata for a partitoned file has changed
- Added back handler::discover_check_version() to be able to check if
a table's or a part table's definition has changed.
- Added handler::check_if_updates_are_ignored(). Needed for partitioning.
- Renamed rebind() -> rebind_psi(), as it was before.
- Changed CHF_xxx hadnler flags to an enum
- Changed some checks from using table->file->ht to use
table->file->partition_ht() to get discovery to work with partitioning.
- If TABLE_SHARE::init_from_binary_frm_image() fails, ensure that we
don't leave any .frm or .par files around.
- Fixed that writefrm() doesn't leave unusable .frm files around
- Appended extension to path for writefrm() to be able to reuse to function
for creating .par files.
- Added DBUG_PUSH("") to a a few functions that caused a lot of not
critical tracing.
MDEV-19964 S3 replication support
Added new configure options:
s3_slave_ignore_updates
"If the slave has shares same S3 storage as the master"
s3_replicate_alter_as_create_select
"When converting S3 table to local table, log all rows in binary log"
This allows on to configure slaves to have the S3 storage shared or
independent from the master.
Other thing:
Added new session variable '@@sql_if_exists' to force IF_EXIST to DDL's.
Changes:
- maria_create() now uses a bit in the parameter flags to check if table
should be encrypted instead of using maria_encrypted_tables.
- Don't encrypt tables that are to be converted to S3
- Added encrypted flag to ARIA_TABLE_CAPABILITIES
- maria_chk --description now prints if table is encrypted. Other
operations is not allowed on encrypted tables.
MDEV-19591
Assertion `!table->pos_in_locked_tables' failed in tc_release_table upon
altering table into S3 under lock.
The problem was that thd->open_tables->pos_in_locked_tables was not reset
when alter table failed to reopen a locked table.
There was a bug in the page cache that didn't take into account that
another thread could be waiting for a page to be read by read_big_block().
Fixed by releasing all waiters in read_big_block()
There are two options when coping S3 tables with mysqldump
(there is startup option --copy_s3_tables, boolean, default no)
1) Ignore all tables with engine S3, as the data is already safe in S3 and any
computer where you restore the backup will automatically discover the S3 table.
2) Copy the table as a normal table with the following 2 changes:
- Change ENGINE=S3 to ENGINE=ARIA;
- After copy add to log 'ALTER TABLE table_name ENGINE=S3'
The error occured because aria_copy_to_s3() function tried to copy .frm file
of partition, but partition does not have it's own .frm file. The same is true
for aria_rename_s3().
To fix this issue the new parameter was added to those two functions to specify
if .frm file must be copied or not. The parameter is set to 'false' for
partitions.
Also there was other issue with EXCHANGE PARTITION. Briefly, there is the
following sequence of operations(see exchange_name_with_ddl_log() for details):
1) rename swap table to temporary table,
2) rename partition to swap table,
3) rename temporary table to partition.
On step (1) .frm file is renamed too. On step (2) the swap table does not
have .frm file, as partition does not have it. On step (3) partition will have
.frm file, because it will be renamed from temporary table. All of this causes
error on different stages of the table access. To fix it, .frm is not touched
at all for s3 during EXCHANGE PARTITION operation. This is implemented in
ha_s3::rename_table() by additional checking of
current_thd->lex->alter_info.partition_flags(see also ALTER_PARTITION_EXCHANGE
in sql_yacc.yy).
A read-only storage engine that stores it's data in (aws) S3
To store data in S3 one could use ALTER TABLE:
ALTER TABLE table_name ENGINE=S3
libmarias3 integration done by Sergei Golubchik
libmarias3 created by Andrew Hutchings
