PDF (US Ltr)
- 43.3Mb
PDF (A4)
- 43.4Mb
Man Pages (TGZ)
- 296.5Kb
Man Pages (Zip)
- 401.9Kb
Info (Gzip)
- 4.3Mb
Info (Zip)
- 4.3Mb
Search Results
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-what-is-new.html
NDB Cluster 7.4 and 7.3 were previous GA releases which have reached their end of life, and which are no longer supported or maintained. What is New in NDB Cluster 8.0 Major changes and new features in NDB Cluster 8.0 which are likely to be of ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-key.html
NDB Cluster uses MD5() for this purpose; for tables using other storage engines, the server employs its own internal hashing function. Unlike the case with other partitioning types, columns used for partitioning by KEY are not restricted to integer ... Partitioning by key is similar to partitioning by hash, except that where hash partitioning employs a user-defined expression, the hashing function for key partitioning is supplied by the MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-functions.html
CREATE FUNCTION GTID_INTERSECTION(gs1 LONGTEXT, gs2 LONGTEXT) RETURNS LONGTEXT RETURN GTID_SUBTRACT(gs1, GTID_SUBTRACT(gs1, gs2)) | This function returns the symmetric difference between two GTID sets, that is, the GTIDs that exist in gs1 but not in ... This section provides examples of stored functions (see Chapter 27, Stored Objects) which you can create using some of the built-in functions provided by MySQL for use with GTID-based replication, listed here: GTID_SUBSET(): Shows whether one GTID set is a subset of ...
https://dev.mysql.com/doc/refman/8.0/en/row-constructor-optimization.html
Consider the following table, which has a primary key on (c1, c2, c3): CREATE TABLE t1 ( c1 INT, c2 INT, c3 INT, c4 CHAR(100), PRIMARY KEY(c1,c2,c3) ); In this query, the WHERE clause uses all columns in the index. For example, these two statements ...
https://dev.mysql.com/doc/refman/8.0/en/scalar-subqueries.html
For example, LIMIT requires literal integer arguments, and LOAD DATA requires a literal string file name. In its simplest form, a subquery is a scalar subquery that returns a single value. A scalar subquery is a simple operand, and you can use it ...
https://dev.mysql.com/doc/refman/8.0/en/storage-engine-setting.html
CREATE TABLE t1 (i INT) ENGINE = INNODB; -- Simple table definitions can be switched from one to another. CREATE TABLE t2 (i INT) ENGINE = CSV; CREATE TABLE t3 (i INT) ENGINE = MEMORY; When you omit the ENGINE option, the default storage engine is ... When you create a new table, you can specify which storage engine to use by adding an ENGINE table option to the CREATE TABLE statement: -- ENGINE=INNODB not needed unless you have set a different -- default storage ...
https://dev.mysql.com/doc/refman/8.0/en/stored-program-restrictions.html
Prepared statement scope is the current session, not the stored program, so the statement could be executed after the program ends, at which point the variables would no longer be in scope. This includes SELECT statements that do not have an INTO ...
https://dev.mysql.com/doc/refman/8.0/en/sys-table-exists.html
This is an OUT parameter, so it must be a variable into which the table type can be stored. Tests whether a given table exists as a regular table, a TEMPORARY table, or a view. If both a temporary and a permanent table exist with the given name, ...
https://dev.mysql.com/doc/refman/8.0/en/version-tokens-installation.html
To avoid this overhead, do not install it unless you plan to use it. This section describes how to install or uninstall Version Tokens, which is implemented in a plugin library file containing a plugin and loadable functions. For general information ...
https://dev.mysql.com/doc/refman/8.0/en/calculating-days.html
CREATE TABLE t1 (year YEAR, month INT UNSIGNED, day INT UNSIGNED); INSERT INTO t1 VALUES(2000,1,1),(2000,1,20),(2000,1,30),(2000,2,2), (2000,2,23),(2000,2,23); The example table contains year-month-day values representing visits by users to the page. The following example shows how you can use the bit group functions to calculate the number of days per month a user has visited a Web ...