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https://dev.mysql.com/doc/refman/9.7/en/mysql-shell-tutorial-python-documents-index.html
If the value is false, the field can contain NULL values. Indexes are used to find documents with specific field values quickly. Without an index, MySQL must begin with the first document and then read through the entire collection to find the ...
https://dev.mysql.com/doc/refman/9.7/en/mysqldm-options.html
--enable-cleartext-plugin Command-Line Format --enable-cleartext-plugin Type Boolean Default Value FALSE Enable the mysql_clear_password cleartext authentication plugin. mysqldm accepts MySQL standard connection options and several mysqldm-specific ...
https://dev.mysql.com/doc/refman/9.7/en/non-typed-operators.html
->> Return value from JSON column after evaluating path and unquoting the result; equivalent to JSON_UNQUOTE(JSON_EXTRACT()). / Division operator := Assign a value = Assign a value (as part of a SET statement, or as part of the SET clause in an ...
https://dev.mysql.com/doc/refman/9.7/en/optimize-blob.html
(Use the CRC32(expr) function to produce the hash value.) Since hash functions can produce duplicate results for different inputs, you still include a clause AND blob_column = long_string_value in the query to guard against false matches; the ...
https://dev.mysql.com/doc/refman/9.7/en/option-modifiers.html
The “enabled” form of the option may be specified in any of these ways: --column-names --enable-column-names --column-names=1 The values ON, TRUE, OFF, and FALSE are also recognized for boolean options (not case-sensitive). Some options are ...
https://dev.mysql.com/doc/refman/9.7/en/outer-join-simplification.html
(That is, it converts the outer join to an inner join.) A condition is said to be null-rejected for an outer join operation if it evaluates to FALSE or UNKNOWN for any NULL-complemented row generated for the operation. Table expressions in the FROM ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-variables-metadata-table.html
The variables_metadata table shows, for each server system variable, its name, scope, type, range of values (where applicable), and description. VARIABLE_SCOPE The variable's scope; this is one of the values listed here: GLOBAL The variable is ...
https://dev.mysql.com/doc/refman/9.7/en/replication-gtids-failover.html
There are a number of techniques when using MySQL Replication with Global Transaction Identifiers (GTIDs) for provisioning a new replica which can then be used for scaleout, being promoted to source as necessary for failover. Each identifier ...
https://dev.mysql.com/doc/refman/9.7/en/replication-gtids-functions.html
This section provides examples of stored functions (see Chapter 27, Stored Objects) which you can create using some of the built-in functions provided by MySQL for use with GTID-based replication, listed here: GTID_SUBSET(): Shows whether one GTID ...
https://dev.mysql.com/doc/refman/9.7/en/replication-options-replica.html
This section explains the server options and system variables that apply to replica servers and contains the following: Startup Options for Replica Servers System Variables Used on Replica Servers Specify the options either on the command line or ...