1. In case of system-versioned table add row_end into FTS_DOC_ID index
in fts_create_common_tables() and innobase_create_key_defs().
fts_n_uniq() returns 1 or 2 depending on whether the table is
system-versioned.
After this patch recreate of FTS_DOC_ID index is required for
existing system-versioned tables. If you see this message in error
log or server warnings: "InnoDB: Table db/t1 contains 2 indexes
inside InnoDB, which is different from the number of indexes 1
defined in the MariaDB" use this command to fix the table:
ALTER TABLE db.t1 FORCE;
2. Fix duplicate history for secondary unique index like it was done
in MDEV-23644 for clustered index (932ec586aa). In case of
existing history row which conflicts with currently inseted row we
check in row_ins_scan_sec_index_for_duplicate() whether that row
was inserted as part of current transaction. In that case we
indicate with DB_FOREIGN_DUPLICATE_KEY that new history row is not
needed and should be silently skipped.
3. Some parts of MDEV-21138 (7410ff436e) reverted. Skipping of
FTS_DOC_ID index for history rows made problems with purge
system. Now this is fixed differently by p.2.
4. wait_all_purged.inc checks that we didn't affect non-history rows
so they are deleted and purged correctly.
Additional FTS fixes
fts_init_get_doc_id(): exclude history rows from max_doc_id
calculation. fts_init_get_doc_id() callback is used only for crash
recovery.
fts_add_doc_by_id(): set max value for row_end field.
fts_read_stopword(): stopwords table can be system-versioned too. We
now read stopwords only for current data.
row_insert_for_mysql(): exclude history rows from doc_id validation.
row_merge_read_clustered_index(): exclude history_rows from doc_id
processing.
fts_load_user_stopword(): for versioned table retrieve row_end field
and skip history rows. For non-versioned table we retrieve 'value'
field twice (just for uniformity).
FTS tests for System Versioning now include maybe_versioning.inc which
adds 3 combinations:
'vers' for debug build sets sysvers_force and
sysvers_hide. sysvers_force makes every created table
system-versioned, sysvers_hide hides WITH SYSTEM VERSIONING
for SHOW CREATE.
Note: basic.test, stopword.test and versioning.test do not
require debug for 'vers' combination. This is controlled by
$modify_create_table in maybe_versioning.inc and these
tests run WITH SYSTEM VERSIONING explicitly which allows to
test 'vers' combination on non-debug builds.
'vers_trx' like 'vers' sets sysvers_force_trx and sysvers_hide. That
tests FTS with trx_id-based System Versioning.
'orig' works like before: no System Versioning is added, no debug is
required.
Upgrade/downgrade test for System Versioning is done by
innodb_fts.versioning. It has 2 combinations:
'prepare' makes binaries in std_data (requires old server and OLD_BINDIR).
It tests upgrade/downgrade against old server as well.
'upgrade' tests upgrade against binaries in std_data.
Cleanups:
Removed innodb-fts-stopword.test as it duplicates stopword.test
Virtual column values are updated in handler in reading commands,
like ha_index_next, etc. This was missing for ha_ft_read.
handler::ha_ft_read: add table->update_virtual_fields() call
- During shutdown, InnoDB fts fails to update synced doc id
when there is only one doc id about to sync. While starting
the server, InnoDB fetches the already synced doc id from
config table. In the subsequent sync operation, InnoDB fails
with DB_DUPLICATE_KEY error.
Add ORDER BY to make the test deterministic.
Add FLUSH TABLES to avoid crash recovery warnings about the table
mysql.plugin. This tends to occur on Valgrind, where the server
shutdown could presumably time out, resulting in a forced kill.
- query->intersection fails to get freed if the query exceeds
innodb_ft_result_cache_limit
- errors from init_ftfuncs were not propogated by delete command
This is taken from percona/percona-server@ef2c0bcb9a
- Import tablespace re-evicts and reload the table definition. During that
time, innodb has to load the table even though the secondary fts index
marked as corrupted
- InnoDB should ignore the single word followed by apostrophe while
tokenising the document. Example is that if the input string is O'brien
then right now, InnoDB seperates into two tokens as O, brien. But
after this patch, InnoDB can ignore the token 'O' and consider
only 'brien'.
- InnoDB mistakenly identifies the non-unique FTS_DOC_ID index as
FTS_DOC_ID_INDEX while loading the table. dict_load_indexes()
should check whether the index is unique before assigning
fts_doc_id_index
- Redundant InnoDB table fails to set the flags2 while loading
the table. It leads to "Upgrade index name failure" during alter
operation. InnoDB should set the flags2 to FTS_AUX_HEX_NAME when
fts is being loaded
- InnoDB fails to create a fts cache while loading the innodb fts
table which is stored in system tablespace. InnoDB should create
the fts cache while loading FTS_DOC_ID column from system column.
- InnoDB FTS DDL decrements the FTS_DOC_ID when there is a
deleted marked record involved. FTS_DOC_ID must never be
reused. The purpose of FTS_DOC_ID is to be a unique row
identifier that will be changed whenever a fulltext indexed
column is updated.
- Make innodb_ft_cache_size & innodb_ft_total_cache_size are dynamic
variable and increase the maximum value of innodb_ft_cache_size to
512MB for 32-bit system and 1 TB for 64-bit system and set
innodb_ft_total_cache_size maximum value to 1 TB for 64-bit system.
- Print warning if the fts cache exceeds the innodb_ft_cache_size
and also unlock the cache if fts cache memory reduces less than
innodb_ft_cache_size.
- In ha_innobase::prepare_inplace_alter_table(), InnoDB should
check whether the table is empty. If the table is empty then
server should avoid downgrading the MDL after prepare phase.
It is more like instant alter, does change only in dicationary
and metadata.
- Changed few debug test case to make non-empty DDL table
Based on mysql/mysql-server@bc9c46bf28
but without sleeps.
The test was verified to hit the debug assertion if the change to
fts_add_doc_by_id() in commit 2d98b967e3
was reverted.
InnoDB commit fails when consecutive FTS_DOC_ID value
is greater than 4294967295.
Fix is that InnoDB should remove the delta FTS_DOC_ID
value limitations and fts should encode 8 byte value,
remove FTS_DOC_ID_MAX_STEP variable. Replaced the
fts0vlc.ic file with fts0vlc.h
fts_encode_int(): Should be able to encode 10 bytes value
fts_get_encoded_len(): Should get the length of the value
which has 10 bytes
fts_decode_vlc(): Add debug assertion to verify the maximum
length allowed is 10.
mach_read_uint64_little_endian(): Reads 64 bit stored in
little endian format
Added a unit test case which check for minimum and maximum
value to do the fts encoding
FTS add index fails
Problem:
========
InnoDB double frees the table if auxiliary fts table
creation fails and fails to set the dict operation
for the transaction. It leads to failure while
dropping newly added index.
Solution:
=========
InnoDB should avoid double freeing and set the
dictionary operation of transaction in
fts_create_common_tables()
InnoDB tries to fetch the deleted doc ids for discarded
tablespace. In i_s_fts_deleted_generic_fill(), InnoDB needs
to check whether the table is discarded or not before fetching
deleted doc ids.
InnoDB should skip the dropped aborted FTS_DOC_ID_INDEX while
checking the existing FTS_DOC_ID_INDEX in the table. InnoDB
should able to create new FTS_DOC_ID_INDEX if the fulltext
index is being added for the first time.
