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https://dev.mysql.com/doc/refman/8.4/en/fulltext-search-mecab.html
The MeCab full-text parser plugin is a full-text parser plugin for Japanese that tokenizes a sequence of text into meaningful words. For example, MeCab tokenizes “データベース管理” (“Database Management”) into ... The built-in MySQL ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-change-buffer.html
The buffered changes, which may result from INSERT, UPDATE, or DELETE operations (DML), are merged later when the pages are loaded into the buffer pool by other read operations. Figure 17.3 Change Buffer Unlike clustered indexes, secondary indexes ... The change buffer is a special data structure that caches changes to secondary index pages when those pages are not in the buffer ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-performance-midpoint_insertion.html
Rather than using a strict LRU algorithm, InnoDB uses a technique to minimize the amount of data that is brought into the buffer pool and never accessed again. Newly read blocks are inserted into the middle of the LRU list. This arrangement divides ...The goal is to make sure that frequently accessed (“hot”) pages remain in the buffer pool, even as read-ahead and full table scans bring in new blocks that might or might not be accessed ...
https://dev.mysql.com/doc/refman/8.4/en/json-utility-functions.html
When the argument is a JSON column, this is the space used to store the JSON document as it was inserted into the column, prior to any partial updates that may have been performed on it afterwards. This section documents utility functions that act ...
https://dev.mysql.com/doc/refman/8.4/en/ldml-collation-example.html
To add a UCA collation for a Unicode character set without recompiling MySQL, use the following procedure. If you are unfamiliar with the LDML rules used to describe the collation's sort characteristics, see Section 12.14.4.2, “LDML Syntax ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-option-tables.html
ndb-blob-read-batch-bytes: Specifies size in bytes that large BLOB reads should be batched into. ndb-blob-write-batch-bytes: Specifies size in bytes that large BLOB writes should be batched into. ndb_log_binlog_index: Insert mapping between epochs ... The following list includes command-line options, system variables, and status variables applicable within mysqld when it is running as an SQL node in an NDB ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-commands.html
This behavior on the server side comes into play for multiple-statement execution (see Multiple Statement Execution Support), and for parsing the body of stored procedures and functions, triggers, and events (see Section 27.1, “Defining Stored ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-nutshell.html
The MySQL Enterprise Data Masking and De-Identification component now includes the ability to flush the data on the secondary or replica into memory. These statements can be divided into two groups those relating to source servers, and those ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-hash.html
In addition, you most likely want to follow this with PARTITIONS num, where num is a positive integer representing the number of partitions into which the table is to be divided. Partitioning by HASH is used primarily to ensure an even distribution ...
https://dev.mysql.com/doc/refman/8.4/en/precision-math-examples.html
Consider these statements: mysql> CREATE TABLE t (i INT, d DECIMAL, f FLOAT); mysql> INSERT INTO t VALUES(1,1,1); mysql> CREATE TABLE y SELECT AVG(i), AVG(d), AVG(f) FROM t; The result is a double only for the floating-point argument. This section ...