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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-ndb-sync-pending-objects-table.html
This table provides information about NDB database objects for which mismatches have been detected and which are waiting to be synchronized between the NDB dictionary and the MySQL data dictionary.
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-objects-summary-global-by-type-table.html
row *************************** OBJECT_TYPE: TABLE OBJECT_SCHEMA: mysql OBJECT_NAME: user COUNT_STAR: 14 SUM_TIMER_WAIT: 365567592 MIN_TIMER_WAIT: 1141704 AVG_TIMER_WAIT: 26111769 MAX_TIMER_WAIT: 334783032 ... Example object wait event summary ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-applier-configuration-table.html
Parameters stored in the table can be changed at runtime with the CHANGE REPLICATION SOURCE TO statement (from MySQL 8.0.23) or CHANGE MASTER TO statement (before MySQL 8.0.23). This table shows the configuration parameters that affect transactions ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-status-variable-summary-tables.html
The Performance Schema makes status variable information available in the tables described in Section 29.12.15, “Performance Schema Status Variable Tables”. It also makes aggregated status variable information available in summary tables, ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tls-channel-status-table.html
Connection interface TLS properties are set at server startup, and can be updated at runtime using the ALTER INSTANCE RELOAD TLS statement. The tls_channel_status table (available as of MySQL 8.0.21) provides information about connection interface ...The tls_channel_status table has these columns: CHANNEL The name of the connection interface to which the TLS property row ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-group-state-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 28.5.2, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATE Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-user-defined-functions-table.html
The mysql.func system table also lists installed loadable functions, but only those installed using CREATE FUNCTION. This difference makes user_defined_functions preferable to mysql.func for checking which loadable functions are installed. The ...
https://dev.mysql.com/doc/refman/8.0/en/precision-math-numbers.html
In MySQL, the DECIMAL type has several synonyms: NUMERIC, DEC, FIXED. In MySQL, types that are synonymous with FLOAT or DOUBLE are DOUBLE PRECISION and REAL. The scope of precision math for exact-value operations includes the exact-value data types ...
https://dev.mysql.com/doc/refman/8.0/en/query-attribute-components.html
As of MySQL 8.0.23, a component service provides access to query attributes (see Section 11.6, “Query Attributes”). Purpose: Implements the mysql_query_attribute_string() function that takes an attribute name argument and returns the attribute ...The query_attributes component uses this service to provide access to query attributes within SQL ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-create-if-not-exists.html
IF NOT EXISTS statements are replicated: Every CREATE DATABASE IF NOT EXISTS statement is replicated, whether or not the database already exists on the source. Similarly, every CREATE TABLE IF NOT EXISTS statement without a SELECT is replicated, ...