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https://dev.mysql.com/doc/refman/5.7/en/macos-installation-launchd.html
macOS uses launch daemons to automatically start, stop, and manage processes and applications such as MySQL. The md5 checksum of a file containing the above snippet is 24710a27dc7a28fb7ee6d825129cd3cf. To enable the launchd service, you can either: ...
https://dev.mysql.com/doc/refman/5.7/en/mysqld-safe.html
--core-file-size=size Command-Line Format --core-file-size=size Type String Command-Line Format --core-file-size=size Type String The size of the core file that mysqld should be able to create. --malloc-lib=[lib_name] Command-Line Format ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-stopwords.html
(See Section 5.1.7, “Server System Variables”.) The variable value should be the path name of the file containing the stopword list, or the empty string to disable stopword filtering. The stopword list is loaded and searched for full-text ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-host-cache-table.html
The host_cache table has these columns: IP The IP address of the client that connected to the server, expressed as a string. HOST The resolved DNS host name for that client IP, or NULL if the name is unknown. The MySQL server maintains an in-memory ...
https://dev.mysql.com/doc/refman/5.7/en/start-slave.html
The option cannot be set to an empty or null string. START SLAVE [thread_types] [until_option] [connection_options] [channel_option] thread_types: [thread_type [, thread_type] ... ] thread_type: IO_THREAD | SQL_THREAD until_option: UNTIL { ...
https://dev.mysql.com/doc/refman/5.7/en/spatial-geojson-functions.html
mysql> SELECT ST_AsGeoJSON(ST_GeomFromText('POINT(11.11111 12.22222)'),2); +-------------------------------------------------------------+ | ST_AsGeoJSON(ST_GeomFromText('POINT(11.11111 12.22222)'),2) | ... This section describes functions for ...
https://dev.mysql.com/doc/refman/5.7/en/hexadecimal-literals.html
For example, a hexadecimal literal assigned to a user-defined variable is a binary string by default. The 0x notation is based on ODBC, for which hexadecimal strings are often used to supply values for BLOB columns. To convert a string or a number ... Hexadecimal literal values are written using X'val' or 0xval notation, where val contains hexadecimal digits (0..9, ...
https://dev.mysql.com/doc/refman/5.7/en/charset-collation-implementations.html
Example: "U+0000 NULL" does not have a weight and is ignorable. mysql> SET NAMES 'utf8' COLLATE 'utf8_unicode_ci'; Query OK, 0 rows affected (0.05 sec) mysql> SELECT HEX('a'), HEX(WEIGHT_STRING('a')); +----------+-------------------------+ | ...
https://dev.mysql.com/doc/refman/5.7/en/example-foreign-keys.html
MySQL supports foreign keys, which permit cross-referencing related data across tables, and foreign key constraints, which help keep the related data consistent. A foreign key relationship involves a parent table that holds the initial column ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-locking.html
Shared and Exclusive Locks Intention Locks Record Locks Gap Locks Next-Key Locks Insert Intention Locks AUTO-INC Locks Predicate Locks for Spatial Indexes Shared and Exclusive Locks InnoDB implements standard row-level locking where there are two ...