Best ASP.NET Hosting for MySQL 8

Best ASP.NET Hosting for MySQL 8

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windowshostingleader.com – MySQL is merely probably the most effective way of storing data. It is versatile, comprehensive, and avoids storing data in 1 massive area. MySQL is utilised with a number of scripting languages, essentially the most common of which getting PHP.

MySQL, is created, distributed, and supported by Oracle Corporation. MySQL Server has a practical set of features developed in close cooperation with our users. It is really likely that your favored application or language supports the MySQL Database Server. Performance and scalability is actually a priority for MySQL, understanding from community feedback and taking into account trends and developments in personal computer hardware and its architecture.

Changes in MySQL 8

Account Management Notes

  • Incompatible Change: The grant tables in the mysql system database are now InnoDB (transactional) tables. Previously, these were MyISAM (nontransactional) tables. This change applies to these tables: user, db, tables_priv, columns_priv, procs_priv, proxies_priv.

    The change of grant table storage engine underlies an accompanying change to the behavior of account-management statements. Previously, an account-management statement that named multiple users could succeed for some users and fail for others. Now, each statement is transactional and either succeeds for all named users or rolls back and has no effect if any error occurs. The statement is written to the binary log if it succeeds, but not if it fails; in that case, rollback occurs and no changes are made. The preceding behavior applies to these statements: ALTER USER, CREATE ROLE, CREATE USER, DROP ROLE, DROP USER,GRANT, RENAME USER, REVOKE. (SET PASSWORD is not listed because it applies to at most one user and is effectively transactional already.) A side effect of this change in behavior is that partially completed account management statements on a MySQL 5.7 master fail when replicated on a MySQL 8.0 slave. For more information, see Atomic Data Definition Statement Support.

C API Notes

  • The libmysqlclient shared library major version number is increased from 20 (used in MySQL 5.7) to 21 for MySQL 8.0. (Bug #77600, Bug #21363863)

Character Set Support

  • The utf8mb4 Unicode character set has a new general collation named utf8mb4_0900_ai_ci. utf8mb4 also has several new language-specific collations with characteristics similar to utf8mb4_0900_ai_ci except that language-specific rules take precedence where applicable. The language-specific collations are indicated by ISO 639-1 language codes in the collation name, as shown in the following table. In two cases the language code has an additional item that denotes a variant (German phone book order, Traditional Spanish).

Compilation Notes

  • Microsoft Windows: For building MySQL on Windows, the toolchain now prefers 64-bit tools when possible (previously 32-bit). This speeds up linking and avoids issues related to limited address space with the 32-bit linker. (Bug #80675, Bug #22900585)
  • CMake now causes the build process to link with the GNU gold linker if it is available. To suppress use of this linker, specify the -DUSE_LD_GOLD=0 CMake option. (Bug #23759968, Bug #82163)
  • The WITH_EXTRA_CHARSETS CMake option has been removed. MySQL builds are configured with all character sets by default now. Users who want fewer character sets can edit cmake/character_sets.cmake directly and recompile the server. (Bug #80005, Bug #22552125)
  • The minimum version of the Boost library for server builds is now 1.60.0. (Bug #79380, Bug #22253921)
  • Work was done to clean up the source code base, including: Removing unneeded CMake checks; removing unused macros from source files; reorganizing header files to reduce the number of dependencies and make them more modular, removing function declarations without definitions, replacing locally written functions with equivalent functions from industry-standard libraries.
  • MySQL source code now permits and uses C++11 features. To enable a good level of C++11 support across all supported platforms, the following minimum compiler versions now apply:
    • GCC: 4.8 or higher
    • Clang: 3.4 or higher (Xcode 7 on OS X)
    • Solaris Studio: 12.4 or higher (Solaris client build only)
    • Visual Studio: 2015
    • CMake: On Windows, the required Visual Studio version results in a required CMake version of 3.2.3 or higher

    On Solaris, the stlport library is no longer used. This makes the SUNPRO_CXX_LIBRARY CMake option obsolete, so it has been removed.

Component Notes

  • MySQL Server now includes a component-based infrastructure for improving server extensibility:
    • A component provides services that are available to the server and other components. (With respect to service use, the server is a component, equal to other components.) Components interact with each other only through the services they provide.
    • The INSTALL COMPONENT and UNINSTALL COMPONENT statements provide an SQL interface for component manipulation at runtime.
    • A loader service registers installed components in the mysql.component system table, and installs registered components during the startup sequence for subsequent server restarts.

    For general information about the component infrastructure and its SQL-level interface, see MySQL Server Components. For information about the internal implementation of components, see http://dev.mysql.com/doc/dev/mysql-server/latest/.

Configuration Notes

  • Incompatible Change; InnoDB: Previously, enabling the innodb_read_only system variable prevented creating and dropping tables only for the InnoDB storage. As of MySQL 8.0. enabling innodb_read_only prevents these operations for all storage engines. Table creation and drop operations modify data dictionary tables in the mysql system database, but those tables use the InnoDB storage engine and cannot be modified when innodb_read_only is enabled. The same principle applies to other table operations that require modifying data dictionary tables, and to operations that modify other tables in the mysql database that use the InnoDB storage engine, such as the grant tables and the func and plugin tables. (Bug #21611899)
  • The hardcoded memory page size of 8KB for the memory-mapped transaction coordinator was too small for platforms such as ARM64 and PowerPC where the page size is much larger. The server now invokes a system call to get the page size of the current platform rather than using a hardcoded value. A consequence for the --log-tc-size option is that the minimum and default values are now 6 times the page size. Also, the value must be a multiple of the page size. Thanks to Alexey Kopytov for the patch. (Bug #23014086, Bug #80818, Bug #26931470, Bug #87995)
  • MySQL now supports a SET PERSIST variant of SET statement syntax, for making configuration changes at runtime that also persist across server restarts. Like SET GLOBAL, SET PERSIST is permitted for any global system variable that is dynamic (settable at runtime). The statement changes the runtime variable value, but also writes the variable setting to an option file named mysqld-auto.cnf in the data directory. At startup, the server processes this file after all other option files. For more information, see Using Option Files, and SET Syntax for Variable Assignment.To provide information showing how each system variable was most recently set, the Performance Schema now has avariables_info table that lists each system variable and the source from which it got its value. See Performance Schema variables_info Table.

    If you upgrade to this MySQL release from an earlier version, you must run mysql_upgrade (and restart the server) to incorporate this change into the Performance Schema.

  • The deprecated mysql_install_db program has been removed from MySQL distributions. Data directory initialization should be performed by invoking mysqld with the --initialize or --initialize-insecure option instead. In addition, the deprecated --bootstrap option for mysqld that was used by mysql_install_db has been removed, and the INSTALL_SCRIPTDIR CMakeoption that controlled the installation location for mysql_install_db has been removed.Version 1 test suite code previously was located in the mysql-test/lib/v1 directory of MySQL source distributions. This code used mysql_install_db and has been removed. The MYSQL_INSTALL_DB environment variable and a value of 1 for the MTR_VERSION environment variable are no longer supported.

Data Dictionary Notes

  • Incompatible Change: MySQL Server now incorporates a global data dictionary containing information about database objects in transactional tables. In previous MySQL releases, dictionary data was stored in metadata files and nontransactional system tables.

Data Type Notes

  • Bit functions and operators comprise BIT_COUNT(), BIT_AND(), BIT_OR(), BIT_XOR(), &, |, ^, ~, <<, and >>. Prior to MySQL 8.0, bit functions and operators required BIGINT (64-bit integer) arguments and returned BIGINT values, so they had a maximum range of 64 bits. Non-BIGINT arguments were converted to BIGINT prior to performing the operation and truncation could occur. Now bit functions and operators permit binary string type arguments (BINARY, VARBINARY, and the BLOB types) and return a value of like type, which enables them to take arguments and produce return values larger than 64 bits. Nonbinary string arguments are converted to BIGINT and processed as such, as before.Permitting binary string arguments for bit functions and operators makes it easier not only to manipulate larger values, but to perform bit operations not easily done previously on certain types of data, such as UUID and IPv6 values. For examples, see Bit Functions and Operators.

    An implication of this change in behavior is that bit operations on binary string arguments might produce a different result in MySQL 8.0 than in 5.7. For information about how to prepare in MySQL 5.7 for potential incompatibilities between MySQL 5.7 and 8.0, see Bit Functions and Operators, in MySQL 5.7 Reference Manual.

Doxygen Notes

  • The MySQL source code has been updated to use Doxygen for the internal documentation. The generated content for this milestone is available at http://dev.mysql.com/doc/dev/mysql-server/8.0.0/. This is a work in progress. As new MySQL versions are distributed, the Doxygen documentation will be updated, with the latest version always available athttp://dev.mysql.com/doc/dev/mysql-server/latest/.It is also possible to generate the Doxygen content locally from a MySQL source distribution using the instructions at Generating MySQL Doxygen Documentation Content.

Optimizer Notes

  • InnoDB: The storage engine interface now enables the optimizer to provide information about the size of the record buffer to be used for scans that the optimizer estimates will read multiple rows. The buffer size can vary based on the size of the estimate. InnoDB uses this variable-size buffering capability to take advantage of row prefetching, and to reduce the overhead of latching and B-tree navigation. Previously, InnoDB used a small, fixed-size buffer.

ASPHostPortal.com As The Best ASP.NET Hosting for MySQL 8

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