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https://dev.mysql.com/doc/refman/5.7/en/information-schema-tables-table.html
Not all storage engines update this time, in which case, the value is always NULL. For views, all TABLES columns are NULL except that TABLE_NAME indicates the view name and TABLE_COMMENT says VIEW. The TABLES table has these columns: TABLE_CATALOG ...
https://dev.mysql.com/doc/refman/5.7/en/obtaining-plugin-information.html
Any that have a PLUGIN_LIBRARY value of NULL are built in and cannot be unloaded. row *************************** PLUGIN_NAME: binlog PLUGIN_VERSION: 1.0 PLUGIN_STATUS: ACTIVE PLUGIN_TYPE: STORAGE ENGINE PLUGIN_TYPE_VERSION: 50158.0 PLUGIN_LIBRARY: ... There are several ways to determine which plugins are installed in the server: The Information Schema PLUGINS table contains a row for each loaded ...
https://dev.mysql.com/doc/refman/5.7/en/other-vendor-data-types.html
To facilitate the use of code written for SQL implementations from other vendors, MySQL maps data types as shown in the following table. These mappings make it easier to import table definitions from other database systems into MySQL. If you create ...
https://dev.mysql.com/doc/refman/5.7/en/outer-join-optimization.html
If there is a row in A that matches the WHERE clause, but there is no row in B that matches the ON condition, an extra B row is generated with all columns set to NULL. For a LEFT JOIN, if the WHERE condition is always false for the generated NULL ...
https://dev.mysql.com/doc/refman/5.7/en/show-plugins.html
row *************************** Name: binlog Status: ACTIVE Type: STORAGE ENGINE Library: NULL License: GPL *************************** 2. row *************************** Name: CSV Status: ACTIVE Type: STORAGE ENGINE Library: NULL License: GPL ...
https://dev.mysql.com/doc/refman/5.7/en/show-table-status.html
Not all storage engines update this time, in which case, the value is always NULL. For views, all columns displayed by SHOW TABLE STATUS are NULL except that Name indicates the view name and Comment says VIEW. SHOW TABLE STATUS [{FROM | IN} ...
https://dev.mysql.com/doc/refman/5.7/en/using-spatial-indexes.html
The following query finds all objects that are in the given rectangle: mysql> SET @poly = -> 'Polygon((30000 15000, 31000 15000, 31000 16000, 30000 16000, 30000 15000))'; mysql> SELECT fid,ST_AsText(g) FROM geom WHERE -> ... The optimizer ...
https://dev.mysql.com/doc/refman/5.7/en/change-replication-filter.html
Values used with REPLICATION_WILD_TABLE and REPLICATION_WILD_IGNORE_TABLE are string expressions, possibly containing (special) wildcard characters, and so must be quoted. Filters set using this statement differ from those set using the server ...
https://dev.mysql.com/doc/refman/5.7/en/declare-handler.html
SQLSTATE [VALUE] sqlstate_value: A 5-character string literal indicating an SQLSTATE value, such as '42S01' to specify “unknown table”: DECLARE CONTINUE HANDLER FOR SQLSTATE '42S02' BEGIN -- body of handler END; Do not use SQLSTATE values that ...statement handler_action: { CONTINUE | EXIT | UNDO } condition_value: { mysql_error_code | SQLSTATE [VALUE] sqlstate_value | condition_name | SQLWARNING | NOT FOUND | SQLEXCEPTION } The DECLARE ...
https://dev.mysql.com/doc/refman/5.7/en/docker-mysql-more-topics.html
The boolean variables including MYSQL_RANDOM_ROOT_PASSWORD, MYSQL_ONETIME_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD, and MYSQL_LOG_CONSOLE are made true by setting them with any strings of nonzero lengths. A MySQL Docker installation is different from a ...