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https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-tablestats-table.html
InnoDB tables are represented in this view if they have been opened since the last server restart and have not aged out of the table cache. The rate at which the AUTOINC value changes depends on how many times auto-increment numbers have been ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-routines-table.html
Notes To see information about a routine, you must be the user named as the routine DEFINER, have the SHOW_ROUTINE privilege, have the SELECT privilege at the global level, or have the CREATE ROUTINE, ALTER ROUTINE, or EXECUTE privilege granted at a ... The ROUTINES table provides information about stored routines (stored procedures and stored ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-file-per-table-tablespaces.html
File-Per-Table Tablespace Advantages File-per-table tablespaces have the following advantages over shared tablespaces such as the system tablespace or general tablespaces. File-Per-Table Tablespace Disadvantages File-per-table tablespaces have the ... A file-per-table tablespace contains data and indexes for a single InnoDB table, and is stored on the file system in a single data ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-init-startup-configuration.html
Because of this, an operating system crash or a power outage may destroy recently committed data, or in the worst case, even corrupt the database because write operations have been reordered. To have doublewrite files created in a location other ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-migration.html
If the floating-point formats differ but you have not used FLOAT or DOUBLE data types in your tables, then the procedure is the same: simply copy the relevant files. This section describes techniques for moving or copying some or all InnoDB tables ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-undo-tablespaces.html
CREATE UNDO TABLESPACE tablespace_name ADD DATAFILE 'file_name.ibu'; The undo tablespace file name must have an .ibu extension. Note In a replication environment, the source and each replica must have its own undo tablespace file directory. For ...
https://dev.mysql.com/doc/refman/8.0/en/installing-development-tree.html
If you see changes or code that you have a question about, ask on MySQL Community Slack. After you have cloned the MySQL Git repository and have checked out the branch you want to build, you can build MySQL Server from the source code. If you ...
https://dev.mysql.com/doc/refman/8.0/en/internal-locking.html
If there are holes, concurrent inserts are disabled but are enabled again automatically when all holes have been filled with new data. If you acquire a table lock explicitly with LOCK TABLES, you can request a READ LOCAL lock rather than a READ lock ... This section discusses internal locking; that is, locking performed within the MySQL server itself to manage contention for table contents by multiple ...
https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html
Two scalar values are comparable if they have the same JSON_TYPE() types, with the exception that values of types INTEGER and DECIMAL are also comparable to each other. Returns true (1) if the two document have any key-value pairs or array elements ... The functions in this section perform search or comparison operations on JSON values to extract data from them, report whether data exists at a location within them, or report the path to data within ...
https://dev.mysql.com/doc/refman/8.0/en/json-table-functions.html
The remaining two values are from different objects, since they have different values in the ord column. This section contains information about JSON functions that convert JSON data to tabular data. JSON_TABLE(expr, path COLUMNS (column_list) [AS] ...