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https://dev.mysql.com/doc/refman/9.7/en/data-masking-policy-usage.html
Both have the same enum_field_type, as returned by Item::data_type(), and are not integer, string, DECIMAL, or REAL types. Dynamic data masking enables you to conditionally mask column data for specific users or roles. A masking policy is a rule, ...
https://dev.mysql.com/doc/refman/9.7/en/subquery-materialization.html
For example, the optimizer might be able to use materialization if both expressions are integer or both are decimal, but cannot if one expression is integer and the other is decimal. The optimizer uses materialization to enable more efficient ...
https://dev.mysql.com/doc/refman/9.7/en/explain.html
In MySQL 9.7, numbers in the output of EXPLAIN ANALYZE and EXPLAIN FORMAT=TREE are formatted according to the following rules: Numbers in the range 0.001-999999.5 are printed as decimal numbers. Decimal numbers less than 1000 have three significant ...In practice, the DESCRIBE keyword is more often used to obtain information about table structure, whereas EXPLAIN is used to obtain a query execution plan (that is, an explanation of how MySQL would execute a ...
https://dev.mysql.com/doc/refman/9.7/en/json-attribute-functions.html
The functions in this section return attributes of JSON values. An error occurs if the argument is not a valid JSON document. An empty array, empty object, or scalar value has depth 1. A nonempty array containing only elements of depth 1 or ...
https://dev.mysql.com/doc/refman/9.7/en/sys-ps-trace-thread.html
in_max_runtime DECIMAL(20,2): The maximum number of seconds (which can be fractional) to collect data. in_interval DECIMAL(20,2): The number of seconds (which can be fractional) to sleep between data collections. Dumps all Performance Schema data ...
https://dev.mysql.com/doc/refman/9.7/en/insert.html
For example, inserting the string '1999.0e-2' into an INT, FLOAT, DECIMAL(10,6), or YEAR column inserts the value 1999, 19.9921, 19.992100, or 1999, respectively. For the FLOAT and DECIMAL columns, the string-to-number conversion considers the ...
https://dev.mysql.com/doc/refman/9.7/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. Assignment of decimal and real values does not preserve the precision or scale of the value. (This ... 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/9.7/en/date-and-time-type-conversion.html
To some extent, you can convert a value from one temporal type to another. However, there may be some alteration of the value or loss of information. In all cases, conversion between temporal types is subject to the range of valid values for the ...
https://dev.mysql.com/doc/refman/9.7/en/update.html
UPDATE is a DML statement that modifies rows in a table. An UPDATE statement can start with a WITH clause to define common table expressions accessible within the UPDATE. Single-table syntax: UPDATE [LOW_PRIORITY] [IGNORE] table_reference SET ...
https://dev.mysql.com/doc/refman/9.7/en/regexp.html
This section discusses the functions and operators available for regular expression matching and illustrates, with examples, some of the special characters and constructs that can be used for regular expression operations. MySQL implements regular ...