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https://dev.mysql.com/doc/refman/8.0/en/fulltext-search-ngram.html
The built-in MySQL full-text parser uses the white space between words as a delimiter to determine where words begin and end, which is a limitation when working with ideographic languages that do not use word delimiters. To address this limitation, ...
https://dev.mysql.com/doc/refman/8.0/en/generated-column-index-optimizations.html
row *************************** id: 1 select_type: SIMPLE table: t1 partitions: NULL type: range possible_keys: gc key: gc key_len: 5 ref: NULL rows: 1 filtered: 100.00 Extra: Using index condition In effect, the optimizer has replaced the ...For ...
https://dev.mysql.com/doc/refman/8.0/en/gis-property-functions.html
Such functions return NULL if the argument is of an incorrect geometry type. For example, the ST_Area() polygon function returns NULL if the object type is neither Polygon nor MultiPolygon. Each function that belongs to this group takes a geometry ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-adding-instances.html
At this point, the group has one member in it, server s1, which has some data in it. It is now time to expand the group by adding the other two servers configured previously. 20.2.1.6.1 Adding a Second Instance In order to add a second instance, ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-bootstrap.html
mysql> CREATE DATABASE test; mysql> USE test; mysql> CREATE TABLE t1 (c1 INT PRIMARY KEY, c2 TEXT NOT NULL); mysql> INSERT INTO t1 VALUES (1, 'Luis'); Check the content of table t1 and the binary log. The process of starting a group for the first ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-system-variables.html
If this system variable is set to NULL when TLSv1.3 is used (which is the default if you do not set the system variable), the ciphersuites that are enabled by default are allowed, as listed in Section 8.3.2, “Encrypted Connection TLS Protocols and ... This section lists the system variables that are specific to the Group Replication ...
https://dev.mysql.com/doc/refman/8.0/en/host-cache.html
Initially, the host name is set to NULL and the flag is false. For permanent failures, the host name remains NULL and the validation flag is set to true. The MySQL server maintains an in-memory host cache that contains information about clients: IP ...
https://dev.mysql.com/doc/refman/8.0/en/ibd2sdi.html
ibd2sdi is a utility for extracting serialized dictionary information (SDI) from InnoDB tablespace files. ibd2sdi can be run on file-per-table tablespace files (*.ibd files), general tablespace files (*.ibd files), system tablespace files (ibdata* ...
https://dev.mysql.com/doc/refman/8.0/en/index-hints.html
row *************************** id: 1 select_type: DELETE table: t1 partitions: NULL type: range possible_keys: col2 key: col2 key_len: 5 ref: NULL rows: 72 filtered: 11.11 Extra: Using where 1 row in set, 1 warning (0.00 sec) . Index hints give ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-buffer-page-lru-table.html
The column is NULL if the server has not yet accessed the table. The INNODB_BUFFER_PAGE_LRU table provides information about the pages in the InnoDB buffer pool; in particular, how they are ordered in the LRU list that determines which pages to ...