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https://dev.mysql.com/doc/refman/5.7/en/replace.html
REPLACE [LOW_PRIORITY | DELAYED] [INTO] tbl_name [PARTITION (partition_name [, partition_name] ...)] [(col_name [, col_name] ...)] {VALUES | VALUE} (value_list) [, (value_list)] ... REPLACE [LOW_PRIORITY | DELAYED] [INTO] tbl_name [PARTITION ...
https://dev.mysql.com/doc/refman/5.7/en/replication-threads-monitor-main.html
row *************************** Id: 2 User: root Host: localhost:32931 db: NULL Command: Binlog Dump Time: 94 State: Has sent all binlog to slave; waiting for binlog to be updated Info: NULL Here, thread 2 is a Binlog Dump thread that services a ...
https://dev.mysql.com/doc/refman/5.7/en/sys-sys-get-config.html
Given a configuration option name, returns the option value from the sys_config table, or the provided default value (which may be NULL) if the option does not exist in the table. If sys_get_config() returns the default value and that value is ...
https://dev.mysql.com/doc/refman/5.7/en/begin-end.html
Use of multiple statements requires that a client is able to send statement strings containing the ; statement delimiter. END syntax is used for writing compound statements, which can appear within stored programs (stored procedures and functions, ...
https://dev.mysql.com/doc/refman/5.7/en/connection-access.html
The client supplies the credentials specified in the row (for example, a password), as indicated by the authentication_string column. The authentication method implemented by the plugin that authenticates the client may or may not use the password ... When you attempt to connect to a MySQL server, the server accepts or rejects the connection based on these conditions: Your identity and whether you can verify it by supplying the proper ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-status-variables.html
If the group is operating in multi-primary mode, shows an empty string. MySQL 5.7 supports one status variable providing information about Group Replication. This variable is described here: group_replication_primary_member Shows the primary ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-optimizer-trace-table.html
MISSING_BYTES_BEYOND_MAX_MEM_SIZE Each remembered trace is a string that is extended as optimization progresses and appends data to it. The OPTIMIZER_TRACE table provides information produced by the optimizer tracing capability for traced ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-init-startup-configuration.html
(The MySQL server changes its current working directory to the data directory when it begins executing.) If you specify innodb_data_home_dir as an empty string, you can specify absolute paths for data files listed in the innodb_data_file_path value.
https://dev.mysql.com/doc/refman/5.7/en/replication-channels.html
To provide compatibility with previous versions, the MySQL server automatically creates on startup a default channel whose name is the empty string (""). In MySQL multi-source replication, a replica opens multiple replication channels, one for each ...
https://dev.mysql.com/doc/refman/5.7/en/replication-options-reference.html
Set to empty string to disallow type conversions between source and replica. The following two sections provide basic information about the MySQL command-line options and system variables applicable to replication and the binary log. Replication ...