- Make JOIN::const_key_parts include keyparts for which
the WHERE clause has an equality in form
"t.key_part=reference_outside_this_select"
- This allows to avoid filesort'ing in some cases (and also
avoid a difficult choice between using filesort or using an index)
10.0 variation of the problem was that system tables were altered
during mysql_upgrade process using old (smaller) column lengths.
At the end the tables were altered again, so the structure was restored,
but if there were long values before the upgrade, they were truncated.
Fixed by using correct column length in alter statements.
normally when too big to be suballocated) to handle big results.
modified:
storage/connect/valblk.cpp
storage/connect/valblk.h
- Add system variable connect_work_size giving the size of the CONNECT
work area used for memory allocation.
modified:
storage/connect/ha_connect.cc
storage/connect/plugutil.c
storage/connect/user_connect.cc
MDEV-5984: EITS: Incorrect filtered% value for single-table select with range access
- Fix calculate_cond_selectivity_for_table() to work correctly with range accesses
over multi-component keys:
= First, take selectivity of all possible range scans into account. Remember which
fields were used bt the range scans.
= Then, calculate selectivity produced by sargable predicates on fields. If a
field was used in a possible range access, assume its selectivity is already
taken into account.
- Fix table_cond_selectivity(): when quick select is used, selectivity of
COND(table) is taken into account in matching_candidates_in_table(). In
table_cond_selectivity() we should not apply it for the second time.
By implementing index_last
modified:
storage/connect/ha_connect.cc
storage/connect/ha_connect.h
storage/connect/xindex.cpp
- Adding the TYPE_BIN Connect internal type
(not tested and not used yet)
modified:
storage/connect/global.h
storage/connect/value.cpp
storage/connect/value.h
THE PERFORMANCE UNDER HEAVY INSERT
Problem:
There are three memset call to allocate memory for system fields
in each insert.
Solution:
Instead of calling it in 3 times, we can combine it into
one memset call. It will reduce the CPU usage under heavy insert.
Approved by Marko rb-4916
conversion from TEXT to VARCHAR in PROXY and MYSQL tables.
modified:
storage/connect/ha_connect.cc
storage/connect/myconn.cpp
storage/connect/myconn.h
storage/connect/myutil.cpp
storage/connect/tabmysql.cpp
storage/connect/tabutil.cpp
- Add the xmap system variable addressing whether file mapping should be used
to handle indexing.
modified:
storage/connect/CMakeLists.txt
storage/connect/ha_connect.cc
storage/connect/xindex.cpp
storage/connect/xindex.h
- Do take care of ~ in Linux version of _fullpath (not tested yet)
modified:
storage/connect/osutil.c
(for case-insensitive filesystems)
sql/events.cc:
for "SHOW EVENTS IN db_name"
sql/sp_head.h:
for "CREATE EVENT", and everything SP-related
sql/sql_acl.cc:
privilege check for mysql_change_db()
sql/sql_db.cc:
for metadata locking of db names
sql/sql_parse.cc:
any_db is a constant, it is not writable
sql/sql_show.cc:
for SHOW CREATE TRIGGER and other trigger-related statements
MDEV-5971 Asymmetry between CAST(DATE'2001-00-00') to INT and TO CHAR in prepared statements
Consistently set maybe_null flag, even not-NULL temporal literal may become NULL
in the restrictive sql_mode.
This will help the following replicaition scenario:
MariaDB 10.0 master (statement replication) -> MariaDB 10.0 slave (row based replication) -> MySQL or MariaDB 5.x slave
mysql-test/r/mysqld--help.result:
Updated help text
mysql-test/suite/rpl/r/create_or_replace_mix.result:
Added more tests
mysql-test/suite/rpl/r/create_or_replace_row.result:
Added more tests
mysql-test/suite/rpl/r/create_or_replace_statement.result:
Added more tests
mysql-test/suite/rpl/t/create_or_replace.inc:
Added more tests
sql/handler.h:
Added org_options so that we can detect what come from the query and what was possible added later.
sql/sql_insert.cc:
Only write CREATE OR REPLACE if was originally specified or if we delete a conflicting table as part of create
sql/sql_parse.cc:
Remember orginal create options
sql/sql_table.cc:
Only write CREATE OR REPLACE if was originally specified or if we delete a conflicting table as part of create
sql/sys_vars.cc:
Updated help text
TABLE_SHARE::visit_subgraph
tc_acquire_table() is not ready to update TABLE::in_use without mutex:
thr1: table= free_tables.pop_front(); // table->in_use is 0
thr2: tdc_remove_table();
thr2: find_deadlock(); // assert(table->in_use != 0)
thr1: table->in_use= thd;
Protect update of TABLE::in_use by LOCK_table_share.
to use named pipe on Windows by specifying the host as '.'
This addresses MDEV-5952.
modified:
storage/connect/myconn.cpp
- Clean some unused code
modified:
storage/connect/connect.cc
storage/connect/connect.h
storage/connect/ha_connect.cc
storage/connect/ha_connect.h
