Search Results
https://dev.mysql.com/doc/refman/8.4/en/column-count-limit.html
This section describes limits on the number of columns in tables and the size of individual rows. Column Count Limits Row Size Limits Column Count Limits MySQL has hard limit of 4096 columns per table, but the effective maximum may be less for a ...
https://dev.mysql.com/doc/refman/8.4/en/communication-errors.html
Other reasons for problems with aborted connections or aborted clients: The max_allowed_packet variable value is too small or queries require more memory than you have allocated for mysqld. If connection problems occur such as communication errors ...
https://dev.mysql.com/doc/refman/8.4/en/constant-folding-optimization.html
Comparisons between constants and column values in which the constant value is out of range or of the wrong type with respect to the column type are now handled once during query optimization rather row-by-row than during execution. The comparisons ...
https://dev.mysql.com/doc/refman/8.4/en/create-procedure.html
By default, a stored routine is associated with the default database. To associate the routine explicitly with a given database, specify the name as db_name.sp_name when you create it. The CREATE FUNCTION statement is also used in MySQL to support ...
https://dev.mysql.com/doc/refman/8.4/en/create-table-secondary-indexes.html
It is also possible to create an index on a JSON column using the JSON_VALUE() function with an expression that can be used to optimize queries employing the expression. A secondary index defined on a virtual column is sometimes referred to as a ...
https://dev.mysql.com/doc/refman/8.4/en/create-table.html
(See Section 7.1.8, “Server System Variables”.) If you want all your tables to be able to grow above the default limit and are willing to have your tables slightly slower and larger than necessary, you can increase the default pointer size by ...
https://dev.mysql.com/doc/refman/8.4/en/create-view.html
If the view does not exist, CREATE OR REPLACE VIEW is the same as CREATE VIEW. If the view does exist, CREATE OR REPLACE VIEW replaces it. For information about restrictions on view use, see Section 27.9, “Restrictions on Views”. The ...
https://dev.mysql.com/doc/refman/8.4/en/ddl-rewriter.html
MySQL 8.4 includes a ddl_rewriter plugin that modifies CREATE TABLE statements received by the server before it parses and executes them. The plugin removes ENCRYPTION, DATA DIRECTORY, and INDEX DIRECTORY clauses, which may be helpful when ...
https://dev.mysql.com/doc/refman/8.4/en/faqs-security.html
Where can I find documentation that addresses security issues for MySQL? A.9.2. Is SSL support built into MySQL binaries, or must I recompile the binary myself to enable it? A.9.5. Does MySQL include support for Roles Based Access Control (RBAC)? ...
https://dev.mysql.com/doc/refman/8.4/en/firewall-usage.html
`slow_log`' These log messages may be helpful in identifying the source of attacks, should that be necessary. `slow_log`' These log messages may be helpful in identifying the source of attacks, should that be necessary. Before using MySQL ...