Improve the range estimation algorithm.
Previously:
For a given level the algo knows the number of pages in the requested range and the n
With this change:
Same idea, but peek a few (10) of the intermediate pages to get a better estimate of
In the bug report one of the examples has a btree with a snippet of the leaf level li
page1(899 records), page2(1 record), page3(1 record), page4(1 record)
so when trying to estimate, the previous algo, assumed there are average (899+1)/2=45
Fix Bug#53761 RANGE estimation for matched rows may be 200 times different
Improve the range estimation algorithm.
Previously:
For a given level the algo knows the number of pages in the requested range
and the number of records on the leftmost and the rightmost page. Then it
assumes all pages in between contain the average between the two border pages
and multiplies this average number by the number of intermediate pages.
With this change:
Same idea, but peek a few (10) of the intermediate pages to get a better
estimate of the average number of records per page. If there are less than 10
intermediate pages then all of them will be scanned and the result will be
precise, not an estimation.
In the bug report one of the examples has a btree with a snippet of the leaf
level like this:
page1(899 records), page2(1 record), page3(1 record), page4(1 record)
so when trying to estimate, the previous algo, assumed there are average
(899+1)/2=450 records per page which went terribly wrong. With this change
page2 and page3 will be read and the exact number of records will be returned.
Approved by: Sunny (rb://401)
------------------------------------------------------------
revno: 3533
revision-id: marko.makela@oracle.com-20100630093149-wmc37t128gic933v
parent: marko.makela@oracle.com-20100629131219-pjbkpk5rsqztmw27
committer: Marko Mäkelä <marko.makela@oracle.com>
branch nick: 5.1-innodb
timestamp: Wed 2010-06-30 12:31:49 +0300
message:
Correct some comments that were added in the fix of Bug #54358
(READ UNCOMMITTED access failure of off-page DYNAMIC or COMPRESSED columns).
Records that lack incompletely written externally stored columns may
be accessed by READ UNCOMMITTED transaction even without involving a
crash during an INSERT or UPDATE operation. I verified this as follows.
(1) added a delay after the mini-transaction for writing the clustered
index 'stub' record was committed (patch attached)
(2) started mysqld in gdb, setting breakpoints to the where the
assertions about READ UNCOMMITTED were added in the bug fix
(3) invoked ibtest3 --create-options=key_block_size=2
to create BLOBs in a COMPRESSED table
(4) invoked the following:
yes 'set transaction isolation level read uncommitted;
checksum table blobt3;select sleep(1);'|mysql -uroot test
(5) noted that one of the breakpoints was triggered
(return(NULL) in btr_rec_copy_externally_stored_field())
=== modified file 'storage/innodb_plugin/row/row0ins.c'
--- storage/innodb_plugin/row/row0ins.c 2010-06-30 08:17:25 +0000
+++ storage/innodb_plugin/row/row0ins.c 2010-06-30 08:17:25 +0000
@@ -2120,6 +2120,7 @@ function_exit:
rec_t* rec;
ulint* offsets;
mtr_start(&mtr);
+ os_thread_sleep(5000000);
btr_cur_search_to_nth_level(index, 0, entry, PAGE_CUR_LE,
BTR_MODIFY_TREE, &cursor, 0,
=== modified file 'storage/innodb_plugin/row/row0upd.c'
--- storage/innodb_plugin/row/row0upd.c 2010-06-30 08:11:55 +0000
+++ storage/innodb_plugin/row/row0upd.c 2010-06-30 08:11:55 +0000
@@ -1763,6 +1763,7 @@ row_upd_clust_rec(
rec_offs_init(offsets_);
mtr_start(mtr);
+ os_thread_sleep(5000000);
ut_a(btr_pcur_restore_position(BTR_MODIFY_TREE, pcur, mtr));
rec = btr_cur_get_rec(btr_cur);
------------------------------------------------------------
revno: 3529
revision-id: marko.makela@oracle.com-20100629125518-m3am4ia1ffjr0d0j
parent: jimmy.yang@oracle.com-20100629024137-690sacm5sogruzvb
committer: Marko Mäkelä <marko.makela@oracle.com>
branch nick: 5.1-innodb
timestamp: Tue 2010-06-29 15:55:18 +0300
message:
Bug#54358: READ UNCOMMITTED access failure of off-page DYNAMIC or COMPRESSED
columns
When the server crashes after a record stub has been inserted and
before all its off-page columns have been written, the record will
contain incomplete off-page columns after crash recovery. Such records
may only be accessed at the READ UNCOMMITTED isolation level or when
rolling back a recovered transaction in recv_recovery_rollback_active().
Skip these records at the READ UNCOMMITTED isolation level.
TODO: Add assertions for checking the above assumptions hold when an
incomplete BLOB is encountered.
btr_rec_copy_externally_stored_field(): Return NULL if the field is
incomplete.
row_prebuilt_t::templ_contains_blob: Clarify what "BLOB" means in this
context. Hint: MySQL BLOBs are not the same as InnoDB BLOBs.
row_sel_store_mysql_rec(): Return FALSE if not all columns could be
retrieved. Previously this function always returned TRUE. Assert that
the record is not delete-marked.
row_sel_push_cache_row_for_mysql(): Return FALSE if not all columns
could be retrieved.
row_search_for_mysql(): Skip records containing incomplete off-page
columns. Assert that the transaction isolation level is READ
UNCOMMITTED.
rb://380 approved by Jimmy Yang
Destroy the rw-lock object before freeing the memory it is occupying.
If we do not do this, then the mutex that is contained in the rw-lock
object btr_search_latch_temp->mutex gets "freed" and subsequently
mutex_free() from sync_close() hits a mutex whose memory has been
freed and crashes.
Approved by: Heikki (via IRC)
Discussed with: Calvin
------------------------------------------------------------
revno: 3438
revision-id: marko.makela@oracle.com-20100504105546-4ew7a77e9uhxmhho
parent: marko.makela@oracle.com-20100504093128-44v6glupe1dsh0ug
committer: Marko M?kel? <marko.makela@oracle.com>
branch nick: 5.1-innodb
timestamp: Tue 2010-05-04 13:55:46 +0300
message:
Remove UNIV_BTR_AVOID_COPY. It was broken because btr_attach_half_pages()
would get the block, new_block in the wrong order.
Fixing that would have complicated the function even further
for this marginal case.
modified:
storage/innodb_plugin/ChangeLog 2425@16c675df-0fcb-4bc9-8058-dcc011a37293:branches%2Fzip%2FChangeLog
storage/innodb_plugin/btr/btr0btr.c 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Fbtr%2Fbtr0btr.c
storage/innodb_plugin/include/univ.i 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Finclude%2Funiv.i
------------------------------------------------------------
------------------------------------------------------------
revno: 3430
revision-id: vasil.dimov@oracle.com-20100428103452-6btsq4xv6v1etb5b
parent: vasil.dimov@oracle.com-20100428103200-vs5nzx245sv2qy7n
committer: Vasil Dimov <vasil.dimov@oracle.com>
branch nick: mysql-5.1-innodb
timestamp: Wed 2010-04-28 13:34:52 +0300
message:
Bug#53046 dict_update_statistics_low can still be run concurrently
on same table
Followup to vasil.dimov@oracle.com-20100428102033-dt3caf531rs3lidr :
Add more asserions, which I forgot.
modified:
storage/innodb_plugin/dict/dict0dict.c 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Fdict%2Fdict0dict.c
------------------------------------------------------------
revno: 3429
revision-id: vasil.dimov@oracle.com-20100428103200-vs5nzx245sv2qy7n
parent: vasil.dimov@oracle.com-20100428102033-dt3caf531rs3lidr
committer: Vasil Dimov <vasil.dimov@oracle.com>
branch nick: mysql-5.1-innodb
timestamp: Wed 2010-04-28 13:32:00 +0300
message:
Revert the fix of Bug#38996 Race condition in ANALYZE TABLE
This is branches/zip@r6032 in SVN and _is part_ of
revid:svn-v4:16c675df-0fcb-4bc9-8058-dcc011a37293:branches/zip:6113
in BZR.
This is being reverted because now the code is serialized directly on
index->stat_n_diff_key_vals[] as the fix for
Bug#53046 dict_update_statistics_low can still be run concurrently on same table
goes.
modified:
storage/innodb_plugin/handler/ha_innodb.cc 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Fhandler%2Fha_innodb.cc
------------------------------------------------------------
revno: 3428
revision-id: vasil.dimov@oracle.com-20100428102033-dt3caf531rs3lidr
parent: vasil.dimov@oracle.com-20100428084627-wtrmc66wqvjsdgj7
committer: Vasil Dimov <vasil.dimov@oracle.com>
branch nick: mysql-5.1-innodb
timestamp: Wed 2010-04-28 13:20:33 +0300
message:
Followup to vasil.dimov@oracle.com-20100428084627-wtrmc66wqvjsdgj7:
Address Marko's suggestions wrt the fix of
Bug#53046 dict_update_statistics_low can still be run concurrently
on same table
modified:
storage/innodb_plugin/dict/dict0dict.c 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Fdict%2Fdict0dict.c
------------------------------------------------------------
revno: 3427
revision-id: vasil.dimov@oracle.com-20100428084627-wtrmc66wqvjsdgj7
parent: mmakela@bk-internal.mysql.com-20100428063325-irts4ze9et5bsqdq
committer: Vasil Dimov <vasil.dimov@oracle.com>
branch nick: mysql-5.1-innodb
timestamp: Wed 2010-04-28 11:46:27 +0300
message:
Fix Bug#53046 dict_update_statistics_low can still be run concurrently
on same table
Protect dict_index_t::stat_n_diff_key_vals[] with an array of
mutexes.
Testing: tested all code paths under UNIV_SYNC_DEBUG
for the one in dict_print() one has to enable the InnoDB table monitor:
CREATE TABLE innodb_table_monitor (a int) ENGINE=INNODB;
modified:
storage/innodb_plugin/btr/btr0cur.c 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Fbtr%2Fbtr0cur.c
storage/innodb_plugin/dict/dict0dict.c 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Fdict%2Fdict0dict.c
storage/innodb_plugin/handler/ha_innodb.cc 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Fhandler%2Fha_innodb.cc
storage/innodb_plugin/include/dict0dict.h 2@16c675df-0fcb-4bc9-8058-dcc011a37293:trunk%2Finclude%2Fdict0dict.h
------------------------------------------------------------
1. BUG#4869 - when innodb tablespace is configured too small,
crash and corruption!
Detailed revision comments:
r6187 | jyang | 2009-11-18 05:27:30 +0200 (Wed, 18 Nov 2009) | 9 lines
branches/5.1: Fix bug #48469 "when innodb tablespace is
configured too small, crash and corruption!". Function
btr_create() did not check the return status of fseg_create(),
and continue the index creation even there is no sufficient
space.
rb://205 Approved by Marko
r6200 | vasil | 2009-11-19 12:14:23 +0200 (Thu, 19 Nov 2009) | 4 lines
branches/5.1:
White space fixup - indent under the opening (
r6203 | jyang | 2009-11-19 15:12:22 +0200 (Thu, 19 Nov 2009) | 8 lines
branches/5.1: Use btr_free_root() instead of fseg_free() for
the fix of bug #48469, because fseg_free() is not defined
in the zip branch. And we could save one mini-trasaction started
by fseg_free().
Approved by Marko.
bzr branch mysql-5.1-performance-version mysql-trunk # Summit
cd mysql-trunk
bzr merge mysql-5.1-innodb_plugin # which is 5.1 + Innodb plugin
bzr rm innobase # remove the builtin
Next step: build, test fixes.
1. BUG#45357 - 5.1.35 crashes with Failing assertion: index->type & DICT_CLUSTERED
2. Also fixes the compilation problem when the flag -DUNIV_MUST_NOT_INLINE
Detailed revision comments:
r5340 | marko | 2009-06-17 12:11:49 +0300 (Wed, 17 Jun 2009) | 4 lines
branches/5.1: row_unlock_for_mysql(): When the clustered index is unknown,
refuse to unlock the record.
(Bug #45357, caused by the fix of Bug #39320).
rb://132 approved by Sunny Bains.
r5339 | marko | 2009-06-17 11:01:37 +0300 (Wed, 17 Jun 2009) | 2 lines
branches/5.1: Add missing #include "mtr0log.h" so that the code compiles
with -DUNIV_MUST_NOT_INLINE.
Bug #42279 Race condition in btr_search_drop_page_hash_when_freed()
Detailed revision comments:
r4032 | marko | 2009-01-23 15:43:51 +0200 (Fri, 23 Jan 2009) | 10 lines
branches/5.1: Merge r4031 from branches/5.0:
btr_search_drop_page_hash_when_freed(): Check if buf_page_get_gen()
returns NULL. The page may have been evicted from the buffer pool
between buf_page_peek_if_search_hashed() and buf_page_get_gen(),
because the buffer pool mutex will be released between these two calls.
(Bug #42279)
rb://82 approved by Heikki Tuuri
Fix race condition which could result in freeing a struct that is
still in use by another thread.
Detailed revision comments:
r2537 | inaam | 2008-07-15 20:46:03 +0300 (Tue, 15 Jul 2008) | 12 lines
branches/5.1 issue# 4
Fixed a timing hole where a thread dropping an index can free the
in-memory index struct while another thread is still using
that structure to remove entries from adaptive hash index belonging
to one of the pages that belongs to the index being dropped.
The fix is to have a reference counter in the index struct and to
wait for this counter to drop to zero beforing freeing the struct.
Reviewed by: Heikki
r2543 | inaam | 2008-07-22 18:57:43 +0300 (Tue, 22 Jul 2008) | 7 lines
branches/5.1:
Removed UNIV_INLINE qualifier from btr_search_info_get_ref_count().
Otherwise compilation failed on non-debug builds.
Pointed by: Vasil
Fixes the following bugs:
- Bug #33349: possible race condition revolving around data dictionary and repartitioning
Introduce retry/sleep logic as a workaround for a transient bug
where ::open fails for partitioned tables randomly if we are using
one file per table.
- Bug #34053: normal users can enable innodb_monitor logging
In CREATE TABLE and DROP TABLE check whether the table in question is one
of the magic innodb_monitor tables and whether the user has enough rights
to mess with it before doing anything else.
- Bug #22868: 'Thread thrashing' with > 50 concurrent conns under an upd-intensive workloadw
- Bug #29560: InnoDB >= 5.0.30 hangs on adaptive hash rw-lock 'waiting for an X-lock'
This is a combination of changes that forward port the scalability fix applied to 5.0
through r1001.
It reverts changes r149 and r122 (these were 5.1 specific changes made in lieu of
scalability fix of 5.0)
Then it applies r1001 to 5.0 which is the original scalability fix.
Finally it applies r2082 which fixes an issue with the original fix.
- Bug #30930: Add auxiliary function to retrieve THD::thread_id
Add thd_get_thread_id() function. Also make check_global_access() function
visible to InnoDB under INNODB_COMPATIBILITY_HOOKS #define.
After applying the snapshots, ensure that code conforms to the final version
of WL 3914.
It is signficant that, after these changes, InnoDB does not define MYSQL_SERVER,
and can be built as an independent storage engine plugin.
Fixes:
Bug#9709: InnoDB inconsistensy causes "Operating System Error 32/33"
Bug#18828: If InnoDB runs out of undo slots, it returns misleading 'table is full'
Bug#20090: InnoDB: Error: trying to declare trx to enter InnoDB
Bug#20352: Make ibuf_contract_for_n_pages tunable
Bug#21101: Wrong error on exceeding max row size for InnoDB table
Bug#21293: Deadlock detection prefers to kill long running FOR UPDATE queries
Bug#22819: SHOW INNODB STATUS crashes the server with an assertion failure under high load
Bug#25078: Make the replication thread to ignore innodb_thread_concurrency
Bug#25645: Assertion failure in file srv0srv.c
Bug#28138: indexing column prefixes produces corruption in InnoDB
Bugs fixed:
- Bug #20877: InnoDB data dictionary memory footprint is too big
- Bug #13544: Second delete of same row in transaction illustrates non-optimal locking
- Bug #20791: valgrind errors in InnoDB
Bugs fixed:
- Bug #20791 valgrind errors in InnoDB
Remove Valgrind warning of Bug #20791 : in new database
creation, we read the doublewrite buffer magic number from
uninitialized memory; the code worked because it was extremely
unlikely that the memory would contain the magic number
- Bug #21784 DROP TABLE crashes 5.1.12-pre if concurrent
queries on the table
remove update_thd() in ::store_lock()
Also includes numerous coding style fixes, etc. See file-level
comments for details.
All but ss677 are against the mysql-5.1 tree only.
Fixes the following bugs:
- Bug #19834: Using cursors when running in READ-COMMITTED can cause InnoDB to crash
- Bug #20213: DBT2 testing cause mysqld to core using Innodb
- Bug #20493: on partition tables, select and show command casue server crash
- Bug #21113: Duplicate printout in SHOW INNODB STATUS
- Bug #21313: rsql_..._recover_innodb_tmp_table is redundant and broken
- Bug #21467: Manual URL wrong in InnoDB "page corrupted" error report
Changes in SQL parser:
* Change default mode of SELECT from "lock in share mode"
to "consistent read".
* Remove support from SELECT for specifying "consistent read".
* Add support in SELECT for specifying "lock in share mode".
* Change all uses of SQL parser to specify "lock in share mode".
* Modify syntax so that the only valid top-level statement is
a procedure definition, since it's the only one that actually
works.
* Add support for lock waits.
Fixed BUG#19542 "InnoDB doesn't increase the Handler_read_prev couter".
Fixed BUG#19609 "Case sensitivity of innodb_data_file_path gives stupid error".
Fixed BUG#19727 "InnoDB crashed server and crashed tables are ot recoverable".
Also:
* Remove remnants of the obsolete concept of memoryfixing tables and indexes.
* Remove unused dict_table_LRU_trim().
* Remove unused 'trx' parameter from dict_table_get_on_id_low(),
dict_table_get(), dict_table_get_and_increment_handle_count().
* Add a normal linked list implementation.
* Add a work queue implementation.
* Add 'level' parameter to mutex_create() and rw_lock_create().
Remove mutex_set_level() and rw_lock_set_level().
* Rename SYNC_LEVEL_NONE to SYNC_LEVEL_VARYING.
* Add support for bound ids in InnoDB's parser.
* Define UNIV_BTR_DEBUG for enabling consistency checks of
FIL_PAGE_NEXT and FIL_PAGE_PREV when accessing sibling
pages of B-tree indexes.
btr_validate_level(): Check the validity of the doubly linked
list formed by FIL_PAGE_NEXT and FIL_PAGE_PREV.
* Adapt InnoDB to the new tablename to filename encoding in MySQL 5.1.
ut_print_name(), ut_print_name1(): Add parameter 'table_id' for
distinguishing names of tables from other identifiers.
New: innobase_convert_from_table_id(), innobase_convert_from_id(),
innobase_convert_from_filename(), innobase_get_charset.
dict_accept(), dict_scan_id(), dict_scan_col(), dict_scan_table_name(),
dict_skip_word(), dict_create_foreign_constraints_low(): Add
parameter 'cs' so that isspace() can be replaced with my_isspace(),
whose operation depends on the connection character set.
dict_scan_id(): Convert identifier to UTF-8.
dict_str_starts_with_keyword(): New extern function, to replace
dict_accept() in row_search_for_mysql().
mysql_get_identifier_quote_char(): Replaced with innobase_print_identifier().
ha_innobase::create(): Remove the thd->convert_strin() call. Pass the
statement to InnoDB in the connection character set and let InnoDB
convert the identifier to UTF-8.
* Add max_row_size to dict_table_t.
* btr0cur.c
btr_copy_externally_stored_field(): Only set the 'offset' variable
when needed.
* buf0buf.c
buf_page_io_complete(): Write to the error log if the page number or
the space id o the disk do not match those in memory. Also write to
the error log if a page was read from the doublewrite buffer. The
doublewrite buffer should be only read by the lower-level function
fil_io() at database startup.
* dict0dict.c
dict_scan_table_name(): Remove fallback to differently encoded name
when the table is not found. The encoding is handled at a higher level.
* ha_innodb.cc
Increment statistic counter in ha_innobase::index_prev() (bug 19542).
Add innobase_convert_string wrapper function and a new file
ha_prototypes.h.
innobase_print_identifier(): Remove TODO comment before calling
get_quote_char_for_identifier(). That function apparently assumes
the identifier to be encoded in UTF-8.
* ibuf0ibuf.c|h
ibuf_count_get(), ibuf_counts[], ibuf_count_inited(): Define these
only #ifdef UNIV_IBUF_DEBUG. Previously, when compiled without
UNIV_IBUF_DEBUG, invoking ibuf_count_get() would crash InnoDB.
The function is only being called #ifdef UNIV_IBUF_DEBUG.
* innodb.result
Adjust the results for changes in the foreign key error messages.
* mem0mem.c|h
New: mem_heap_dup(), mem_heap_printf(), mem_heap_cat().
* os0file.c
Check the page trailers also after writing to disk. This improves
chances of diagnosing bug 18886.
os_file_check_page_trailers(): New function for checking that the
two copies of the LSN stamped on the page match.
os_aio_simulated_handle(): Call os_file_check_page_trailers()
before and after os_file_write().
* row0mysql.c
Move trx_commit_for_mysql(trx) calls before calls to
row_mysql_unlock_data_dictionary(trx) (bug 19727).
* row0sel.c
row_fetch_print(): Handle SQL NULL values without crashing.
row_sel_store_mysql_rec(): Remove useless call to rec_get_nth_field
when handling an externally stored column.
Fetch externally stored fields when using InnoDB's internal SQL
parser.
Optimize BLOB selects by using prebuilt->blob_heap directly instead
of first reading BLOB data to a temporary heap and then copying it
to prebuilt->blob_heap.
* srv0srv.c
srv_master_thread(): Remove unreachable code.
* srv0start.c
srv_parse_data_file_paths_and_sizes(): Accept lower-case 'm' and
'g' as abbreviations of megabyte and gigabyte (bug 19609).
srv_parse_megabytes(): New fuction.
* ut0dbg.c|h
Implement InnoDB assertions (ut_a and ut_error) with abort() when
the code is compiled with GCC 3 or later on other platforms than
Windows or Netware. Also disable the variable ut_dbg_stop_threads
and the function ut_dbg_stop_thread() i this case, unless
UNIV_SYC_DEBUG is defined. This should allow the compiler to
generate more compact code for assertions.
* ut0list.c|h
Add ib_list_create_heap().
* Fix BUG#15650: "DELETE with LEFT JOIN crashes server with innodb_locks_unsafe_for binlog"
* Fix BUG#17134: "Partitions: uncommitted changes are visible"
* Fix BUG#17992: "Partitions: InnoDB, somehow rotten table after UPDATE"
row0ins.c: MySQL's partitioned table code does not set preduilt->sql_stat_start right
if it does an insert in the same statement after doing a search first in the same
partition table. We now write trx id always to the buffer, not just when flag
sql_stat_start is on. This will waste CPU time very sightly.
* Fix BUG#18077: "InnoDB uses full explicit table locks in stored FUNCTION"
* Fix BUG#18238: "When locks exhaust the buffer pool, InnoDB does not roll back the trx"
* Fix BUG#18252" "Disk space leak in updates of InnoDB BLOB rows in 5.0 and 5.1"
* Fix BUG#18283: "When InnoDB returns error 'lock table full', MySQL can write to binlog too much"
* Fix BUG#18350: "Use consistent read in CREATE ... SELECT ... if innodb_locks_unsafe_for_binlog"
* Fix BUG#18384: "InnoDB memory leak on duplicate key errors in 5.0 if row has many columns"
* Fix BUG#18934: "InnoDB crashes when table uses column names like DB_ROW_ID"
Refuse tables that use reserved column names.
* InnoDB's SQL parser:
- Add support for UNSIGNED types, EXIT keyword, quoted identifiers, user-function callbacks
for processing results of FETCH statements, bound literals, DATA_VARCHAR for bound literals.
- Allow bound literals of type non-INTEGER to be of length 0.
- Add make_flex.sh and update lexer/parser generation documentation.
- Add comment clarifying the difference between 'alias' and 'indirection' fields in sym_node_t.
- Remove never reached duplicate code in pars_set_dfield_type().
- Rewrite pars_info datatypes and APIs, add a few helper functions.
- Since the functions definitions in pars_info_t are accessed after pars_sql() returns
in the query graph execution stage, we can't free pars_info_t in pars_sql(). Instead,
make pars_sql() transfer ownership of pars_info_t to the created query graph, and
make que_graph_free() free it if needed.
- Allow access to system columns like DB_ROW_ID.
* Use bound literals in row_truncate_table_for_mysql, row_drop_table_for_mysql,
row_discard_tablespace_for_mysql, and row_rename_table_for_mysql.
* Setting an isolation level of the transaction to read committed weakens the locks for
this session similarly like the option innodb_locks_unsafe_for binlog. This patch removes
alnost all gap locking (used in next-key locking) and makes MySQL to release the row locks
on the rows which does not belong to result set. Additionally, nonlocking selects on
INSERT INTO SELECT, UPDATE ... (SELECT ...), and CREATE ... SELECT ... use a nonlocking
consistent read. If a binlog is used, then binlog format should be set to row based
binloging to make the execution of the complex SQL statements.
* Disable the statistic variables btr_search_n_hash_fail and n_hash_succ, n_hash_fail,
n_patt_succ, and n_searches of btr_search_t in builds without #ifdef UNIV_SEARCH_PERF_STAT.
* Make innodb.test faster. Group all consistent read test cases to a one test case and
wait their lock timeout after all have been send to the server. Decrease amount of rows
inserted in a certain test - this has no effect on the effectiveness of the test and
reduces the running time by ~10 sec. Remove temporary work-arounds from innodb.result
now that ALTER TABLE DROP FOREIGN KEY works once again.
* Make innodb_unsafe_binlog.test faster. Grout all consistent read test cases to a one
test case amd wait their lock timeout after all have been sent to the server. Remove
unnecessary option --loose_innodb_lock_wait_timeout.
* Print dictionary memory size in SHOW INNODB STATUS.
* Fix memory leaks in row_create_table_for_mysql() in rare corner cases.
* Remove code related to clustered tables. They were never implemented, and the
implementation would be challenging with ROW_FORMAT=COMPACT. Remove the table types
DICT_TABLE_CLUSTER_MEMBER and DICT_TABLE_CLUSTER and all related tests and functions.
dict_table_t: Remove mix_id, mix_len, mix_id_len, mix_id_buf, and cluster_name.
plan_t: Remove mixed_index.
dict_create_sys_tables_tuple(): Set MIX_ID=0, MIX_LEN=0, CLUSTER_NAME=NULL when
inserting into SYS_TABLES.
dict_tree_check_search_tuple(): Enclose in #ifdef UNIV_DEBUG.
* Move calling of thr_local_free() from trx_free_for_mysql() to
innobase_close_connection().
Fixed BUGS:
#3300: "UPDATE statement with no index column in where condition locks
all rows"
Implement semi-consistent read to reduce lock conflicts at the cost
of breaking serializability.
ha_innobase::unlock_row(): reset the "did semi consistent read" flag
ha_innobase::was_semi_consistent_read(),
ha_innobase::try_semi_consistent_read(): new methods
row_prebuilt_t, row_create_prebuilt(): add field row_read_type for
keeping track of semi-consistent reads
row_vers_build_for_semi_consistent_read(),
row_sel_build_committed_vers_for_mysql(): new functions
row_search_for_mysql(): implement semi-consistent reads
#9802: "Foreign key checks disallow alter table".
Added test cases.
#12456: "Cursor shows incorrect data - DML does not affect,
probably caching"
This patch implements a high-granularity read view to be used with
cursors. In this high-granularity consistent read view modifications
done by the creating transaction after the cursor is created or
future transactions are not visible. But those modifications that
transaction did before the cursor was created are visible.
#12701: "Support >4GB buffer pool and log files on 64-bit Windows"
Do not call os_file_create_tmpfile() at runtime. Instead, create all
tempfiles at startup and guard access to them with mutexes.
#13778: "If FOREIGN_KEY_CHECKS=0, one can create inconsistent FOREIGN KEYs".
When FOREIGN_KEY_CHECKS=0 we still need to check that datatypes between
foreign key references are compatible.
#14189: "VARBINARY and BINARY variables: trailing space ignored with InnoDB"
innobase_init(): Assert that
DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number.
dtype_get_pad_char(): Do not pad VARBINARY or BINARY columns.
row_ins_cascade_calc_update_vec(): Refuse ON UPDATE CASCADE when trying
to change the length of a VARBINARY column that refers to or is referenced
by a BINARY column. BINARY columns are no longer padded on comparison,
and thus they cannot be padded on storage either.
#14747: "Race condition can cause btr_search_drop_page_hash_index() to crash"
Note that buf_block_t::index should be protected by btr_search_latch
or an s-latch or x-latch on the index page.
btr_search_drop_page_hash_index(): Read block->index while holding
btr_search_latch and use the cached value in the loop. Remove some
redundant assertions.
#15108: "mysqld crashes when innodb_log_file_size is set > 4G"
#15308: "Problem of Order with Enum Column in Primary Key"
#15550: "mysqld crashes in printing a FOREIGN KEY error in InnoDB"
row_ins_foreign_report_add_err(): When printing the parent record,
use the index in the parent table rather than the index in the child table.
#15653: "Slow inserts to InnoDB if many thousands of .ibd files"
Keep track on unflushed modifications to file spaces. When there are tens
of thousands of file spaces, flushing all files in fil_flush_file_spaces()
would be very slow.
fil_flush_file_spaces(): Only flush unflushed file spaces.
fil_space_t, fil_system_t: Add a list of unflushed spaces.
#15991: "innodb-file-per-table + symlink database + rename = cr"
os_file_handle_error(): Map the error codes EXDEV, ENOTDIR, and EISDIR
to the new code OS_FILE_PATH_ERROR. Treat this code as OS_FILE_PATH_ERROR.
This fixes the crash on RENAME TABLE when the .ibd file is a symbolic link
to a different file system.
#16157: "InnoDB crashes when main location settings are empty"
This patch is from Heikki.
#16298: "InnoDB segfaults in INSERTs in upgrade of 4.0 -> 5.0 tables
with VARCHAR BINARY"
dict_load_columns(): Set the charset-collation code
DATA_MYSQL_BINARY_CHARSET_COLL for those binary string columns
that lack a charset-collation code, i.e., the tables were created
with an older version of MySQL/InnoDB than 4.1.2.
#16229: "MySQL/InnoDB uses full explicit table locks in trigger processing"
Take a InnoDB table lock only if user has explicitly requested a table
lock. Added some additional comments to store_lock() and external_lock().
#16387: "InnoDB crash when dropping a foreign key <table>_ibfk_0"
Do not mistake TABLENAME_ibfk_0 for auto-generated id.
dict_table_get_highest_foreign_id(): Ignore foreign constraint
identifiers starting with the pattern TABLENAME_ibfk_0.
#16582: "InnoDB: Error in an adaptive hash index pointer to page"
Account for a race condition when dropping the adaptive hash index
for a B-tree page.
btr_search_drop_page_hash_index(): Retry the operation if a hash index
with different parameters was built meanwhile. Add diagnostics for the
case that hash node pointers to the page remain.
btr_search_info_update_hash(), btr_search_info_update_slow():
Document the parameter "info" as in/out.
#16814: "SHOW INNODB STATUS format error in LATEST FOREIGN KEY ERROR
section"
Add a missing newline to the LAST FOREIGN KEY ERROR section in SHOW
INNODB STATUS output.
dict_foreign_error_report(): Always print a newline after invoking
dict_print_info_on_foreign_key_in_create_format().
#16827: "Better InnoDB error message if ibdata files omitted from my.cnf"
#17126: "CHECK TABLE on InnoDB causes a short hang during check of adaptive
hash"
CHECK TABLE blocking other queries, by releasing the btr_search_latch
periodically during the adaptive hash table validation.
#17405: "Valgrind: conditional jump or move depends on unititialised values"
buf_block_init(): Reset magic_n, buf_fix_count and io_fix to avoid
testing uninitialized variables.
