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https://dev.mysql.com/doc/connector-net/en/connector-net-introduction.html
Entity Framework 6 and Entity Framework Core to migrate data to and from MySQL data tables. MySQL Connector/NET enables you to develop .NET applications that require secure, high-performance data connectivity with MySQL. It implements the required ...
https://dev.mysql.com/doc/connector-net/en/connector-net-programming-datetime-fractional.html
To use the more precise date and time types, specify a value from 1 to 6 when creating the table column, for example TIME(3) or DATETIME(6), representing the number of digits of precision after the decimal point. MySQL Connector/NET supports the ...
https://dev.mysql.com/doc/connector-python/en/connector-python-api-mysqlconnection-cmd-init-db.html
In subsequent queries, this database is the default for table references that include no explicit database qualifier. Syntax: cnx.cmd_init_db(db_name) This method makes specified database the default (current) database.
https://dev.mysql.com/doc/internals/en/coding-style.html
Having the difference frequent at the end of long lines is very uncomfortable. Write SQL statements in the style of the MySQL Reference Manual SQL keywords and reserved words: uppercase Identifiers (table names, column names, etc.): lowercase Ignore ... Please have a look at the C/C++ coding guidelines and apply them when they make ...
https://dev.mysql.com/doc/internals/en/implementing-external-lock-method.html
The [custom-engine.html#custom-engine-api-reference-external_lock external_lock()] method is called at the start of a statement or when a LOCK TABLES statement is issued. Examples of using external_lock() can be found in the sql/ha_innodb.cc file, ...
https://dev.mysql.com/doc/internals/en/implementing-records-in-range-method.html
The [custom-engine.html#custom-engine-api-reference-records_in_range records_in_range()] method is called by the optimizer to assist in choosing which index on a table to use for a query or join. It is defined as follows: ha_rows ...
https://dev.mysql.com/doc/internals/en/innodb-fil-header.html
The word "space" is generic jargon for either "log" or "tablespace". -------- - root - -------- | ---------------------- | | | | -------- -------- - leaf - <--> - leaf - -------- -------- Everyone has seen a B-tree and knows that the entries in the ...
https://dev.mysql.com/doc/internals/en/support-for-delete.html
The following example is from the CSV storage engine: int ha_tina::delete_row(const byte * buf) { DBUG_ENTER("ha_tina::delete_row"); statistic_increment(table->in_use->status_var.ha_delete_count, &LOCK_status); if (chain_append()) DBUG_RETURN(-1); ...For non-indexed storage engines the parameter can be ignored, but transactional storage engines may need to store the deleted data for rollback ...
https://dev.mysql.com/doc/ndbapi/en/mccj-clusterj-clusterjexception.html
com.mysql.clusterj.ClusterJFatalUserException If an exception is detected during initialization of a persistent interface, for example annotating a column that doesn't exist in the mapped table, it is reported as a user exception. Applications can ...
https://dev.mysql.com/doc/ndbapi/en/ndb-nodejs-api-errors.html
errors "25000" : "Invalid Transaction State", "2C000" : "Invalid character set name", "42S02" : "Table not found", "IM001" : "Driver does not support this function", /* Implementation-defined classes (NDB) */ "NDB00" : "Refer to ndb_error for ...