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https://dev.mysql.com/doc/refman/5.7/en/sys-ps-is-consumer-enabled.html
Returns YES or NO to indicate whether a given Performance Schema consumer is enabled, or NULL if the argument is NULL. (Prior to MySQL 5.7.28, the function returns NULL if the argument is not a valid consumer name.) This function accounts for the ...If the argument is not a valid consumer name, an error ...
https://dev.mysql.com/doc/refman/5.7/en/audit-log-filter-definitions.html
Arguments can refer to predefined variables, event fields, or string or numeric constants. The following list describes the permitted predefined functions for function items: audit_log_exclude_accounts_is_null() Checks whether the ...For information ...
https://dev.mysql.com/doc/refman/5.7/en/regexp.html
Table 12.14 Regular Expression Functions and Operators Name Description NOT REGEXP Negation of REGEXP REGEXP Whether string matches regular expression RLIKE Whether string matches regular expression A regular expression is a powerful way of ...This ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-blob-tool.html
--connect-string Command-Line Format --connect-string=connection_string Type String Default Value [none] Same as --ndb-connectstring. --database=db_name, -d Command-Line Format --database=name Type String Default Value [none] Specify the database to ... This tool can be used to check for and remove orphaned BLOB column parts from NDB tables, as well as to generate a file listing any orphaned ...
https://dev.mysql.com/doc/refman/5.7/en/using-date.html
MySQL also permits a “relaxed” string format when updating and in a WHERE clause that compares a date to a DATE, DATETIME, or TIMESTAMP column. MySQL can also convert a string containing no separators (such as '20040815'), provided it makes ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-top.html
--passwd[=password], -p Command-Line Format --passwd=password Introduced 5.7.19-ndb-7.6.3 Removed 5.7.20-ndb-7.6.4 Type String Default Value NULL Connect to a MySQL Server using this password and the MySQL user specified by --user. ndb_top displays ...
https://dev.mysql.com/doc/refman/5.7/en/user-variables.html
User variables can be assigned a value from a limited set of data types: integer, decimal, floating-point, binary or nonbinary string, or NULL value. If you refer to a variable that has not been initialized, it has a value of NULL and a type of ...A ... You can store a value in a user-defined variable in one statement and refer to it later in another ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-search-ngram.html
For example, with a token size of 2, the ngram parser parses the string “abc def” into four tokens: “ab”, “bc”, “de” and “ef”. For example, the string “abc” (assuming ngram_token_size=2) is converted to “ab bc”. For ...
https://dev.mysql.com/doc/refman/5.7/en/migrating-from-year2.html
YEAR(2) Limitations Issues with the YEAR(2) data type include ambiguity of displayed values, and possible loss of information when values are dumped and reloaded or converted to strings. Conversion of a 2-digit or 4-digit YEAR data value to string ... This section describes problems that can occur when using the 2-digit YEAR(2) data type and provides information about converting existing YEAR(2) columns to 4-digit year-valued columns, which can be declared as YEAR with an implicit display width of 4 characters, or equivalently as YEAR(4) with an explicit display ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-size-pl.html
This is a Perl script that can be used to estimate the amount of space that would be required by a MySQL database if it were converted to use the NDBCLUSTER storage engine. Unlike the other utilities discussed in this section, it does not require ...