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https://dev.mysql.com/doc/refman/5.7/en/conditions-and-parameters.html
If an exception is handled by a CONTINUE or EXIT handler that contains a RESIGNAL statement, execution of RESIGNAL pops the Diagnostics Area stack, thus signalling the exception (that is, the information that existed before entry into the handler).
https://dev.mysql.com/doc/refman/5.7/en/information-schema-files-table.html
MAXIMUM_SIZE For InnoDB: The maximum number of bytes permitted in the file. SELECT FILE_ID, FILE_NAME, FILE_TYPE, TABLESPACE_NAME, FREE_EXTENTS, TOTAL_EXTENTS, EXTENT_SIZE, INITIAL_SIZE, MAXIMUM_SIZE, AUTOEXTEND_SIZE, DATA_FREE, STATUS FROM ... The ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-intro.html
For example, you can change the port that memcached listens on, reduce the maximum number of simultaneous connections, change the maximum memory size for a key-value pair, or enable debugging messages for the error log. Batch size options default to ... The InnoDB memcached plugin implements memcached as a MySQL plugin daemon that accesses the InnoDB storage engine directly, bypassing the MySQL SQL ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-tuning.html
In case of an outage, a maximum of 100 records are lost, which may be an acceptable margin of error. Because using InnoDB in combination with memcached involves writing all data to disk, whether immediately or sometime later, raw performance is ...
https://dev.mysql.com/doc/refman/5.7/en/numeric-type-syntax.html
For integer data types, M indicates the minimum display width. Display width is unrelated to the range of values a type can store, as described in Section 11.1.6, “Numeric Type Attributes”. For floating-point and fixed-point data types, M is ...
https://dev.mysql.com/doc/refman/5.7/en/se-csv-repair.html
The CSV storage engine supports the CHECK TABLE and REPAIR TABLE statements to verify and, if possible, repair a damaged CSV table. When running the CHECK TABLE statement, the CSV file is checked for validity by looking for the correct field ...
https://dev.mysql.com/doc/refman/5.7/en/data-change-optimization.html
For inserting and updating large volumes of data (known in the industry as ETL, for “extract-transform-load”), sometimes you use other SQL statements or external commands, that mimic the effects of INSERT, UPDATE, and DELETE statements. This ...
https://dev.mysql.com/doc/refman/5.7/en/foreign-key-optimization.html
If a table has many columns, and you query many different combinations of columns, it might be efficient to split the less-frequently used data into separate tables with a few columns each, and relate them back to the main table by duplicating the ...
https://dev.mysql.com/doc/refman/5.7/en/gis-class-linestring.html
A LineString is a Curve with linear interpolation between points. LineString Examples On a world map, LineString objects could represent rivers. LineString Properties A LineString has coordinates of segments, defined by each consecutive pair of ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-schema-privileges-table.html
The SCHEMA_PRIVILEGES table has these columns: GRANTEE The name of the account to which the privilege is granted, in 'user_name'@'host_name' format. TABLE_CATALOG The name of the catalog to which the schema belongs. The value can be any privilege ...