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https://dev.mysql.com/doc/refman/8.4/en/communication-errors.html
If connection problems occur such as communication errors or aborted connections, use these sources of information to diagnose problems: The error log. The host cache, which is accessible using the Performance Schema host_cache table. See Section ...
https://dev.mysql.com/doc/refman/8.4/en/concurrent-inserts.html
If there are multiple INSERT statements, they are queued and performed in sequence, concurrently with the SELECT statements. The results of a concurrent INSERT may not be visible immediately. The concurrent_insert system variable can be set to ...
https://dev.mysql.com/doc/refman/8.4/en/conditions-and-parameters.html
If a stored procedure exits with an unhandled exception, modified values of OUT and INOUT parameters are not propagated back to the caller. If an exception is handled by a CONTINUE or EXIT handler that contains a RESIGNAL statement, execution of ...
https://dev.mysql.com/doc/refman/8.4/en/connecting-using-uri-or-key-value-pairs.html
This section describes use of URI-like connection strings or key-value pairs to specify how to establish connections to the MySQL server, for clients such as MySQL Shell. For information on establishing connections using command-line options, for ...
https://dev.mysql.com/doc/refman/8.4/en/constraint-enum.html
ENUM and SET columns provide an efficient way to define columns that can contain only a given set of values. See Section 13.3.5, “The ENUM Type”, and Section 13.3.6, “The SET Type”. Unless strict mode is disabled (not recommended, but see ...
https://dev.mysql.com/doc/refman/8.4/en/controlling-query-plan-evaluation.html
The task of the query optimizer is to find an optimal plan for executing an SQL query. Because the difference in performance between “good” and “bad” plans can be orders of magnitude (that is, seconds versus hours or even days), most query ...
https://dev.mysql.com/doc/refman/8.4/en/create-tablespace.html
The precise syntax and semantics depend on the storage engine used. MySQL NDB Cluster also supports tablespaces using the NDB storage engine. Considerations for InnoDB Considerations for NDB Cluster Options Notes InnoDB Examples NDB Example ...
https://dev.mysql.com/doc/refman/8.4/en/create-user.html
CREATE USER [IF NOT EXISTS] user [auth_option] [, user [auth_option]] ... [REQUIRE {NONE | tls_option [[AND] tls_option] ...}] [WITH resource_option [resource_option] ...] [password_option | lock_option] ... It enables authentication, role, ...
https://dev.mysql.com/doc/refman/8.4/en/creating-rsa-files-using-openssl.html
This section describes how to use the openssl command to set up the RSA key files that enable MySQL to support secure password exchange over unencrypted connections for accounts authenticated by the sha256_password (deprecated) and ...
https://dev.mysql.com/doc/refman/8.4/en/cursor-restrictions.html
Server-side cursors are implemented in the C API using the mysql_stmt_attr_set() function. A server-side cursor enables a result set to be generated on the server side, but not transferred to the client except for those rows that the client ...