Use ICU to work with timezones, to retrieve current timezone name,
abbreviation, and offset from GMT. However in case TZ environment variable
is used to set timezone, and ICU does not have corresponding one,
C runtime functions will be used.
Moved some of timezone handling to mysys.
Added unit tests.
rpl.rpl_invoked_features fails sporadically with "Duplicate key error"
The reason was that Event e11 was re-executed before
"ALTER EVENT e11 DISABLE" had been executed.
Fixed by increasing re-schedule time
Other things:
- Removed double accounting of 'execution_count'. It was incremented in
top->mark_last_executed(thd) that was executed a few lines earlier.
MDEV-3953 Add columns for ROWS_EXAMINED, ROWS_SENT, and ROWS_READ to I_S and processlist
MDEV-32441 SENT_ROWS shows random wrong values when stored function
is selected.
MDEV-32281 EXAMINED_ROWS is not populated in information_schema.processlist upon SELECT.
Added ROWS_SENT to information_schema.processlist
This is to have the same information as Percona server (SENT_ROWS)
To ensure that information_schema.processlist has correct values for
sent_rows and examined_rows I introduced two new variables to hold the
total counts so far. This was needed as stored functions and stored
procedures will reset the normal counters to be able to count rows for
each statement individually for slow query log.
Other things:
- Selects with functions shows in processlist the total examined_rows
and sent_rows by the main statement and all functions.
- Stored procedures shows in processlist examined_rows and sent_rows
per stored procedure statement.
- Fixed some double accounting for sent_rows and examined_rows.
- HANDLER operations now also supports send_rows and examined_rows.
- Display sizes for MEMORY_USED, MAX_MEMORY_USED, EXAMINED_ROWS and
QUERY_ID in information_schema.processlist changed to 10 characters.
- EXAMINED_ROWS and SENT_ROWS changed to bigint.
- INSERT RETURNING and DELETE RETURNING now updates SENT_ROWS.
- As thd is always up to date with examined_rows, we do not need
to handle examined row counting for unions or filesort.
- I renamed SORT_INFO::examined_rows to m_examined_rows to ensure that
we don't get bugs in merges that tries to use examined_rows.
- Removed calls of type "thd->set_examined_row_count(0)" as they are
not needed anymore.
- Removed JOIN::join_examined_rows
- Removed not used functions:
THD::set_examined_row_count()
- Made inline some functions that where called for each row.
MDEV-27106 added REMOTE_TABLE, REMOTE_DATABASE, REMOTE_SERVER spider
table options. In this commit, we add all remaining options for table
params that are not marked to be deprecated.
All these options are parsed as strings from sql statements and have
string values at the sql level, so that we can determine whether it is
specified by checking its nullness.
The string values are further parsed by Spider into their actual types
in the SPIDER_SHARE, including string list, bounded nonnegative int,
bounded nonnegative int list, nonnegative longlong, boolean, and key
hints. Except for string lists, all other types are validated during
this parsing process.
Most of the options are backward compatible, i.e. they accept any
values that is accepted by there corresponding param parser. The only
exception is the index hint IDX which corresponds to the idxNNN param
name. For example,
'idx000 "f PRIMARY", idx001 "u k1"'
translates to
IDX="f PRIMARY u k1".
We include a test with all options specified, and tests involving
spider table options of all actual types.
Any table options, if present, will cause comments to be ignored with
a warning. The warning can be disabled by setting a new spider
global/session system variable spider_suppress_comment_ignored_warning
to 1.
Another global/session variable introduced is spider_ignore_comments,
which if set to 1, will cause COMMENT and CONNECTION strings to be
ignored unconditionally, whether or not table options are specified.
MDEV-28699 Shrink temporary tablespaces without restart
- Introduced the variable "innodb_truncate_temporary_tablespace_now"
to shrink the temporary tablespace.
Steps for shrinking the temporary tablespace:
1) Find the last used extent in temporary tablespace
by iterating through the BITMAP in extent descriptor pages
2) If the last used extent is lesser than user specified size
then set desired target size to user specified size
3) Store the page contents of "to be modified" extent
descriptor pages, latches the "to be modified" extent
descriptor pages and check for buffer pool memory availability
4) Update the FSP_SIZE and FSP_FREE_LIMIT in header page
5) Remove the "to be truncated" pages from FSP_FREE and
FSP_FREE_FRAG list
6) Reset the bitmap in the last descriptor pages for the
"to be truncated" pages.
7) Clear the freed range in temporary tablespace which
are to be truncated.
8) Evict the "to be truncated" temporary tablespace pages
from LRU list.
9) In case of multiple files, calculate the truncated last
file size and do truncation in last file
10) Commit the mini-transaction for shrinking the tablespace
MDEV-32525 Validate --redirect_url supplied as server flag
Like sql_mode, we factor out of ON_CHECK function for export, to be
used in get_options() during server startup, for validation of
--redirect_url value.
