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https://github.com/MariaDB/server.git
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4e9322e2ff
Raise notes if indexes cannot be used:
- in case of data type or collation mismatch (diferent error messages).
- in case if a table field was replaced to something else
(e.g. Item_func_conv_charset) during a condition rewrite.
Added option to write warnings and notes to the slow query log for
slow queries.
New variables added/changed:
- note_verbosity, with is a set of the following options:
basic - All old notes
unusable_keys - Print warnings about keys that cannot be used
for select, delete or update.
explain - Print unusable_keys warnings for EXPLAIN querys.
The default is 'basic,explain'. This means that for old installations
the only notable new behavior is that one will get notes about
unusable keys when one does an EXPLAIN for a query. One can turn all
of all notes by either setting note_verbosity to "" or setting sql_notes=0.
- log_slow_verbosity has a new option 'warnings'. If this is set
then warnings and notes generated are printed in the slow query log
(up to log_slow_max_warnings times per statement).
- log_slow_max_warnings - Max number of warnings written to
slow query log.
Other things:
- One can now use =ALL for any 'set' variable to set all options at once.
For example using "note_verbosity=ALL" in a config file or
"SET @@note_verbosity=ALL' in SQL.
- mysqldump will in the future use @@note_verbosity=""' instead of
@sql_notes=0 to disable notes.
- Added "enum class Data_type_compatibility" and changing the return type
of all Field::can_optimize*() methods from "bool" to this new data type.
Reviewer & Co-author: Alexander Barkov <bar@mariadb.com>
- The code that prints out the notes comes mainly from Alexander
61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
/* Copyright (C) 2009, 2017, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 or later of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
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/* Defining what to log to slow log */
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#ifndef LOG_SLOW_INCLUDED
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#define LOG_SLOW_INCLUDED
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#define LOG_SLOW_VERBOSITY_INIT 0
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#define LOG_SLOW_VERBOSITY_INNODB (1U << 0) /* Old option */
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#define LOG_SLOW_VERBOSITY_QUERY_PLAN (1U << 1)
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#define LOG_SLOW_VERBOSITY_EXPLAIN (1U << 2)
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#define LOG_SLOW_VERBOSITY_STORAGE_ENGINE (1U << 3) /* Replaces InnoDB */
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#define LOG_SLOW_VERBOSITY_WARNINGS (1U << 4)
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#define LOG_SLOW_VERBOSITY_FULL (1U << 5)
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#define LOG_SLOW_VERBOSITY_ENGINE (LOG_SLOW_VERBOSITY_FULL | \
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LOG_SLOW_VERBOSITY_INNODB | \
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LOG_SLOW_VERBOSITY_STORAGE_ENGINE)
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#define QPLAN_INIT QPLAN_QC_NO
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#define QPLAN_ADMIN (1U << 0)
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#define QPLAN_FILESORT (1U << 1)
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#define QPLAN_FILESORT_DISK (1U << 2)
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#define QPLAN_FILESORT_PRIORITY_QUEUE (1U << 3)
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#define QPLAN_FULL_JOIN (1U << 4)
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#define QPLAN_FULL_SCAN (1U << 5)
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#define QPLAN_NOT_USING_INDEX (1U << 6)
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#define QPLAN_QC (1U << 7)
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#define QPLAN_QC_NO (1U << 8)
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#define QPLAN_TMP_TABLE (1U << 9)
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#define QPLAN_TMP_DISK (1U << 10)
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/* ... */
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#define QPLAN_STATUS (1UL << 31) /* not in the slow_log_filter */
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#define QPLAN_MAX (1UL << 31) /* reserved as placeholder */
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/* Bits for log_slow_disabled_statements */
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#define LOG_SLOW_DISABLE_ADMIN (1 << 0)
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#define LOG_SLOW_DISABLE_CALL (1 << 1)
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#define LOG_SLOW_DISABLE_SLAVE (1 << 2)
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#define LOG_SLOW_DISABLE_SP (1 << 3)
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/* Bits for log_disabled_statements */
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#define LOG_DISABLE_SLAVE (1 << 0)
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#define LOG_DISABLE_SP (1 << 1)
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#endif /* LOG_SLOW_INCLUDED */
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