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https://dev.mysql.com/doc/refman/8.4/en/gis-data-formats.html
Two standard spatial data formats are used to represent geometry objects in queries: Well-Known Text (WKT) format Well-Known Binary (WKB) format Internally, MySQL stores geometry values in a format that is not identical to either WKT or WKB format.
https://dev.mysql.com/doc/refman/8.4/en/information-functions.html
This function can be used for the default value of a VARCHAR or TEXT column, as shown in the following CREATE TABLE statement: CREATE TABLE t (c VARCHAR(288) DEFAULT (CURRENT_USER())); DATABASE() Returns the default (current) database name as a ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-innodb-ft-index-cache-table.html
The INNODB_FT_INDEX_CACHE table provides token information about newly inserted rows in a FULLTEXT index. Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-row-format.html
Tables that use the REDUNDANT row format store the first 768 bytes of variable-length column values (VARCHAR, VARBINARY, and BLOB and TEXT types) in the index record within the B-tree node, with the remainder stored on overflow pages. Tables that ...
https://dev.mysql.com/doc/refman/8.4/en/json.html
When the server later must read a JSON value stored in this binary format, the value need not be parsed from a text representation. The space required to store a JSON document is roughly the same as for LONGBLOB or LONGTEXT; see Section 13.7, ...The ...
https://dev.mysql.com/doc/refman/8.4/en/loading-tables.html
You could create a text file pet.txt containing one record per line, with values separated by tabs, and given in the order in which the columns were listed in the CREATE TABLE statement. To represent these in your text file, use \N (backslash, ...
https://dev.mysql.com/doc/refman/8.4/en/myisamchk-general-options.html
This is often the case when you have large key values for CHAR, VARCHAR, or TEXT columns, because the sort operation needs to store the complete key values as it proceeds. ft_min_word_len and ft_max_word_len indicate the minimum and maximum word ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-programs-ndb-size-pl.html
Usage perl ndb_size.pl [--database={db_name|ALL}] [--hostname=host[:port]] [--socket=socket] \ [--user=user] [--password=password] \ [--help|-h] [--format={html|text}] \ [--loadqueries=file_name] [--savequeries=file_name] By default, this utility ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-prepared-statements-instances-table.html
C API Function Corresponding Server Command mysql_stmt_prepare() COM_STMT_PREPARE mysql_stmt_execute() COM_STMT_EXECUTE mysql_stmt_close() COM_STMT_CLOSE The text protocol. For the text protocol, this column is the external statement name assigned ... The Performance Schema provides instrumentation for prepared statements, for which there are two protocols: The binary ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-statement-digests.html
The statement event tables (events_statements_current, events_statements_history, and events_statements_history_long) have columns for storing normalized statement digests and the corresponding digest SHA-256 hash values: DIGEST_TEXT is the text of ... The MySQL server is capable of maintaining statement digest ...