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https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-index.html
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 relevant fields. If a collection is large and queries on a ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/en/optimize-blob.html
When storing a large blob containing textual data, consider compressing it first. Do not use this technique when the entire table is compressed by InnoDB or MyISAM. For a table with several columns, to reduce memory requirements for queries that do ...
https://dev.mysql.com/doc/refman/8.0/en/option-modifiers.html
Some options are “boolean” and control behavior that can be turned on or off. For example, the mysql client supports a --column-names option that determines whether or not to display a row of column names at the beginning of query results.
https://dev.mysql.com/doc/refman/8.0/en/outer-join-simplification.html
Table expressions in the FROM clause of a query are simplified in many cases. At the parser stage, queries with right outer join operations are converted to equivalent queries containing only left join operations. When the optimizer evaluates plans ...
https://dev.mysql.com/doc/refman/8.0/en/replication-functions.html
The functions described in the following sections are used with MySQL Replication. GTID_SUBTRACT() Return all GTIDs in set that are not in subset. MASTER_POS_WAIT() Block until the replica has read and applied all updates up to the specified ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/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/8.0/en/replication-gtids-lifecycle.html
The life cycle of a GTID consists of the following steps: A transaction is executed and committed on the source. This client transaction is assigned a GTID composed of the source's UUID and the smallest nonzero transaction sequence number not yet ...
https://dev.mysql.com/doc/refman/8.0/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 ...