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https://dev.mysql.com/doc/refman/8.0/en/innodb-transaction-isolation-levels.html
The second UPDATE blocks when it tries to acquire x-locks on the same records, as it also uses the index defined on column b. Transaction isolation is one of the foundations of database processing. Isolation is the I in the acronym ACID; the ...
https://dev.mysql.com/doc/refman/8.0/en/installing-source-distribution.html
If you have multiple source trees at the same level (for example, to build multiple versions of MySQL), the second strategy can be advantageous. With the second strategy, you can use the same name for the build directory within each source tree. To ...
https://dev.mysql.com/doc/refman/8.0/en/join.html
INNER JOIN and , (comma) are semantically equivalent in the absence of a join condition: both produce a Cartesian product between the specified tables (that is, each and every row in the first table is joined to each and every row in the second ...
https://dev.mysql.com/doc/refman/8.0/en/locking-service.html
Lock acquisition calls take an integer timeout value that indicates how many seconds to wait to acquire locks before giving up. lock_timeout: An integer number of seconds to wait to acquire the locks before giving up. The final argument is an ...
https://dev.mysql.com/doc/refman/8.0/en/myisamchk-table-info.html
If this value is missing, the line corresponds to the second or later column of a multiple-column key. For the table shown in the example, there are two table description lines for the second index. In the preceding example, the second key is 40 ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-desc.html
--connect-retry-delay Command-Line Format --connect-retry-delay=# Type Integer Default Value 5 Minimum Value 0 Maximum Value 5 Number of seconds to wait between attempts to contact management server. ndb_desc provides a detailed description of one ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-restore.html
--connect-retry-delay Command-Line Format --connect-retry-delay=# Type Integer Default Value 5 Minimum Value 0 Maximum Value 5 Number of seconds to wait between attempts to contact management server. --progress-frequency=N Command-Line Format ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-what-is-new.html
The following sections describe changes in the implementation of MySQL NDB Cluster in NDB Cluster 8.0 through 8.0.44, as compared to earlier release series. NDB Cluster 8.4 is also available for production; while NDB 8.0 is still supported, we ...
https://dev.mysql.com/doc/refman/8.0/en/nested-join-optimization.html
In the second query, it is formed with an inner join operation. For the second query, the parentheses cannot be omitted, although the join expression here can be interpreted unambiguously without them. The following discussion refers to the join ...
https://dev.mysql.com/doc/refman/8.0/en/proxy-users.html
This enables the external user to be a proxy for the second user; that is, to assume the privileges of the second user: The external user is a “proxy user” (a user who can impersonate or become known as another user). The second user is a ...The ...