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https://dev.mysql.com/doc/refman/8.0/en/innodb-persistent-stats.html
The persistent optimizer statistics feature improves plan stability by storing statistics to disk and making them persistent across server restarts so that the optimizer is more likely to make consistent choices each time for a given query. You ...
https://dev.mysql.com/doc/refman/8.0/en/docker-mysql-more-topics.html
Environment variables which can be used to configure a MySQL instance are listed here: The boolean variables including MYSQL_RANDOM_ROOT_PASSWORD, MYSQL_ONETIME_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD, and MYSQL_LOG_CONSOLE are made true by setting ...
https://dev.mysql.com/doc/refman/8.0/en/xml-functions.html
Table 14.16 XML Functions Name Description ExtractValue() Extract a value from an XML string using XPath notation UpdateXML() Return replaced XML fragment This section discusses XML and related functionality in MySQL. For both ExtractValue() and ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndbd.html
--connect-delay=# Command-Line Format --connect-delay=# Deprecated Yes (removed in 8.0.28-ndb-8.0.28) Type Numeric Default Value 5 Minimum Value 0 Maximum Value 3600 Determines the time to wait between attempts to contact a management server when ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-operations.html
When you add a primary key using the ALGORITHM=COPY clause, MySQL converts NULL values in the associated columns to default values: 0 for numbers, an empty string for character-based columns and BLOBs, and 0000-00-00 00:00:00 for DATETIME. However, ... Online support details, syntax examples, and usage notes for DDL operations are provided under the following topics in this ...Index Operations Primary Key Operations Column Operations Generated Column Operations Foreign Key Operations Table Operations Tablespace ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-upgrade.html
Check and repair operations can be time-consuming, particularly for large tables. For upgrade instructions, see Section 7.1.15, “MySQL Server Time Zone Support”, and Section 7.1.17, “Server-Side Help Support”. Note As of MySQL 8.0.16, the ...Because mysql_upgrade no longer performs upgrade tasks, it exits with status 0 ...
https://dev.mysql.com/doc/refman/8.0/en/keyring-hashicorp-plugin.html
Note The operations described in this step are required only when starting Vault the first time, to obtain the unseal key and root token. Create a new file named mysql.hcl with the following content: path "kv/mysql/*" { capabilities = ["create", ...
https://dev.mysql.com/doc/refman/8.0/en/cast-functions.html
CAST(expr AS type [ARRAY]) CAST(timestamp_value AT TIME ZONE timezone_specifier AS DATETIME[(precision)]) timezone_specifier: [INTERVAL] '+00:00' | 'UTC' With CAST(expr AS type syntax, the CAST() function takes an expression of any type and produces ...For a DATE, DATETIME, or TIMESTAMP value, return the YEAR portion of the ... Table 14.15 Cast Functions and Operators Name Description Deprecated BINARY Cast a string to a binary string 8.0.27 CAST() Cast a value as a certain type CONVERT() Cast a value as a certain type Cast ...
https://dev.mysql.com/doc/refman/8.0/en/bug-reports.html
Writing a good bug report takes patience, but doing it right the first time saves time both for us and for yourself. Most compilers are under development all the time and become better version by version. Before posting a bug report about a ...In ...
https://dev.mysql.com/doc/refman/8.0/en/mysqladmin.html
--connect-timeout=value Command-Line Format --connect-timeout=value Type Numeric Default Value 43200 The maximum number of seconds before connection timeout. --shutdown-timeout=value Command-Line Format --shutdown-timeout=seconds Type Numeric ...You ...debug Prior to MySQL 8.0.20, tell the server to write debug information to the error ...