https://dev.mysql.com/writing-audit-plugins.html
Within the server, the pluggable audit interface is implemented in the sql_audit.h and sql_audit.cc files in the sql directory of MySQL source distributions. Additionally, several places in the server call the audit interface when an auditable event ... This section describes how to write a server-side audit plugin, using the example plugin found in the plugin/audit_null directory of MySQL source ...
https://dev.mysql.com/c-api-prepared-statement-type-conversions.html
Here are some examples: If you use MYSQL_TYPE_LONG with an int variable to pass an integer value to the server that is to be stored into a FLOAT column, MySQL converts the value to floating-point format before storing it. If you fetch an SQL ...
https://dev.mysql.com/data-type-defaults.html
Examples: CREATE TABLE t1 ( i INT DEFAULT -1, c VARCHAR(10) DEFAULT '', price DOUBLE(16,2) DEFAULT 0.00 ); SERIAL DEFAULT VALUE is a special case. In the definition of an integer column, it is an alias for NOT NULL AUTO_INCREMENT UNIQUE. The ...
https://dev.mysql.com/ddl-rewriter.html
For example, the plugin may enable restoring such dump files into an unencrypted instance or in an environment where the paths outside the data directory are not accessible. If ddl_rewriter rewrites a statement, it generates a warning: mysql> CREATE ... MySQL 8.0.16 and higher includes a ddl_rewriter plugin that modifies CREATE TABLE statements received by the server before it parses and executes ...
https://dev.mysql.com/general-tablespaces.html
The unique file name is a 128 bit UUID formatted into five groups of hexadecimal numbers separated by dashes (aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee). mysql> CREATE TABLESPACE `ts2` ADD DATAFILE 'ts2.ibd' FILE_BLOCK_SIZE = 8192 Engine=InnoDB; mysql> ... A general tablespace is a shared InnoDB tablespace that is created using CREATE TABLESPACE ...
https://dev.mysql.com/generated-column-index-optimizations.html
For example: CREATE TABLE t1 (f1 INT, gc INT AS (f1 + 1) STORED, INDEX (gc)); The generated column, gc, is defined as the expression f1 + 1. The column is also indexed and the optimizer can take that index into account during execution plan ...This ...
https://dev.mysql.com/identifiers.html
The identifier quote character is the backtick (`): mysql> SELECT * FROM `select` WHERE `select`.id > 100; If the ANSI_QUOTES SQL mode is enabled, it is also permissible to quote identifiers within double quotation marks: mysql> CREATE TABLE "test" ... Certain objects within MySQL, including database, table, index, column, alias, view, stored procedure, partition, tablespace, resource group and other object names are known as ...
https://dev.mysql.com/innodb-auto-increment-handling.html
An example follows, where c1 is an AUTO_INCREMENT column of table t1: INSERT INTO t1 (c1,c2) VALUES (1,'a'), (NULL,'b'), (5,'c'), (NULL,'d'); Another type of “mixed-mode insert” is INSERT ... The settings are 0, 1, or 2, for “traditional”, ... InnoDB provides a configurable locking mechanism that can significantly improve scalability and performance of SQL statements that add rows to tables with AUTO_INCREMENT ...
https://dev.mysql.com/innodb-fulltext-index.html
When incoming documents are tokenized, the individual words (also referred to as “tokens”) are inserted into the index tables along with position information and the associated Document ID (DOC_ID). The inverted index is partitioned into six ...
https://dev.mysql.com/innodb-memcached-porting-mysql.html
If you are using lookup values that contain spaces, transform or hash them into values without spaces before using them as keys in calls to add(), set(), get(), and so on. If there is a short numeric primary key column in an InnoDB table, use it as ... Consider these aspects of memcached applications when adapting an existing MySQL schema or application to use the daemon_memcached plugin: memcached keys cannot contain spaces or newlines, because these characters are used as separators in the ASCII ...
