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https://dev.mysql.com/doc/refman/8.4/en/gis-wkt-functions.html
The only permitted key value is axis-order, with permitted values of lat-long, long-lat and srid-defined (the default). These functions take as arguments a Well-Known Text (WKT) representation and, optionally, a spatial reference system identifier ...
https://dev.mysql.com/doc/refman/8.4/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/8.4/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/8.4/en/group-replication-configuring-ssl-for-recovery.html
group_replication_recovery_ssl_cert: The path name of the SSL public key certificate file to use for distributed recovery connections. group_replication_recovery_ssl_key: The path name of the SSL private key file to use for distributed recovery ...
https://dev.mysql.com/doc/refman/8.4/en/hash-joins.html
row *************************** id: 1 select_type: SIMPLE table: t1 partitions: NULL type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 1 filtered: 100.00 Extra: NULL *************************** 2. row *************************** ...It is possible to control whether hash joins are employed using one of the BNL and NO_BNL optimizer hints, or by setting block_nested_loop=on or block_nested_loop=off as part of the setting for the optimizer_switch server system ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-change-buffer.html
Change buffering is not supported for a secondary index if the index contains a descending index column or if the primary key includes a descending index column. Configuring Change Buffering When INSERT, UPDATE, and DELETE operations are performed ... 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-compression-usage.html
After the innodb_file_per_table option is configured, specify the ROW_FORMAT=COMPRESSED clause or KEY_BLOCK_SIZE clause, or both, in a CREATE TABLE or ALTER TABLE statement to create a compressed table in a file-per-table tablespace. The ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-deadlock-example.html
The following example illustrates how an error can occur when a lock request causes a deadlock. Client A enables innodb_print_all_deadlocks, creates two tables, 'Animals' and 'Birds', and inserts data into each. Thererfore, the previous read-only ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-information-schema-fulltext_index-tables.html
mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_CONFIG; +---------------------------+-------+ | KEY | VALUE | +---------------------------+-------+ | optimize_checkpoint_limit | 180 | | synced_doc_id | 8 | | stopword_table_name | | | use_stopword ...INNODB_FT_BEING_DELETED: Provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-information-schema-temp-table-info.html
Create a simple InnoDB temporary table: mysql> CREATE TEMPORARY TABLE t1 (c1 INT PRIMARY KEY) ENGINE=INNODB; Query INNODB_TEMP_TABLE_INFO to view the temporary table metadata. mysql> CREATE TEMPORARY TABLE t1 (c1 INT PRIMARY KEY) ENGINE=INNODB; ...