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https://dev.mysql.com/doc/refman/8.0/en/savepoint.html
A new savepoint level is created when a stored function is invoked or a trigger is activated. When the function or trigger terminates, any savepoints it created are released and the previous savepoint level is restored. SAVEPOINT identifier ...
https://dev.mysql.com/doc/refman/8.0/en/serialized-dictionary-information.html
Other storage engines store SDI data in .sdi files that are created for a given table in the table's database directory. The MySQL server uses an internal API that is accessed during DDL operations to create and maintain SDI records. In addition to ...
https://dev.mysql.com/doc/refman/8.0/en/session-state-tracking.html
A client can enable these trackers to receive notification of changes to its session state. Uses for Session State Trackers Available Session State Trackers C API Session State Tracker Support Test Suite Session State Tracker Support Uses for ...
https://dev.mysql.com/doc/refman/8.0/en/set-variable.html
User-Defined Variable Assignment Parameter and Local Variable Assignment System Variable Assignment SET Error Handling Multiple Variable Assignment System Variable References in Expressions User-Defined Variable Assignment User-defined variables are ...variable: { user_var_name | param_name | local_var_name | {GLOBAL | @@GLOBAL.} system_var_name | {PERSIST | @@PERSIST.} system_var_name | {PERSIST_ONLY | @@PERSIST_ONLY.} system_var_name | [SESSION | ...
https://dev.mysql.com/doc/refman/8.0/en/show-procedure-code.html
SHOW PROCEDURE CODE proc_name This statement is a MySQL extension that is available only for servers that have been built with debugging support. It displays a representation of the internal implementation of the named stored procedure. A similar ...
https://dev.mysql.com/doc/refman/8.0/en/show-warnings.html
Warnings are generated for DML statements such as INSERT, UPDATE, and LOAD DATA as well as DDL statements such as CREATE TABLE and ALTER TABLE. mysql> CREATE TABLE t1 (a TINYINT NOT NULL, b CHAR(4)); Query OK, 0 rows affected (0.05 sec) mysql> ...
https://dev.mysql.com/doc/refman/8.0/en/slow-query-log.html
The server creates the file in the data directory unless an absolute path name is given to specify a different directory. Administrative statements include ALTER TABLE, ANALYZE TABLE, CHECK TABLE, CREATE INDEX, DROP INDEX, OPTIMIZE TABLE, and REPAIR ... The slow query log consists of SQL statements that take more than long_query_time seconds to execute and require at least min_examined_row_limit rows to be ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-analysis-functions.html
MySQL provides functions to perform various operations on spatial data.
https://dev.mysql.com/doc/refman/8.0/en/spatial-convenience-functions.html
Given two points pt1 and pt2, ST_MakeEnvelope() creates the result geometry on an abstract plane like this: If pt1 and pt2 are equal, the result is the point pt1. According to Boost.Geometry, geometries might become invalid as a result of the ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-geohash-functions.html
The string might be shorter than max_length characters because the algorithm that creates the geohash value continues until it has created a string that is either an exact representation of the location or max_length characters, whichever comes ...