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https://dev.mysql.com/precision-math-numbers.html
Approximate-value data types and numeric literals are handled as floating-point numbers. For example, 2.34 is an exact-value (fixed-point) number, whereas 2.34E0 is an approximate-value (floating-point) number. The FLOAT and DOUBLE data types are ...
https://dev.mysql.com/udf-calling.html
For arguments that have no fixed number of decimals, the decimals value is set to 31, which is 1 more than the maximum number of decimals permitted for the DECIMAL, FLOAT, and DOUBLE data types. A decimals value of 31 is used for arguments in cases ... This section describes the different functions that you need to define when you create a simple ...
https://dev.mysql.com/numeric-type-attributes.html
As of MySQL 8.0.17, the UNSIGNED attribute is deprecated for columns of type FLOAT, DOUBLE, and DECIMAL (and any synonyms) and will be removed in a future MySQL version. As of MySQL 8.0.17, AUTO_INCREMENT support is deprecated for FLOAT and DOUBLE ... MySQL supports an extension for optionally specifying the display width of integer data types in parentheses following the base keyword for the ...
https://dev.mysql.com/server-error-reference.html
Error number: 1427; Symbol: ER_M_BIGGER_THAN_D; SQLSTATE: 42000 Message: For float(M,D), double(M,D) or decimal(M,D), M must be >= D (column '%s'). Error number: 3856; Symbol: ER_WARN_DEPRECATED_FLOAT_AUTO_INCREMENT; SQLSTATE: HY000 Message: ... The ...
https://dev.mysql.com/innodb-migration.html
InnoDB data and log files are binary-compatible on all platforms having the same floating-point number format. If the floating-point formats differ but you have not used FLOAT or DOUBLE data types in your tables, then the procedure is the same: ...
https://dev.mysql.com/constant-folding-optimization.html
row *************************** Level: Note Code: 1003 Message: /* select#1 */ select `test`.`t`.`ti` AS `ti` from `test`.`t` where (`test`.`t`.`ti` = 255) 1 row in set (0.00 sec) Floating- or fixed-point value. If the constant is one of the decimal ... Comparisons between constants and column values in which the constant value is out of range or of the wrong type with respect to the column type are now handled once during query optimization rather row-by-row than during ...
https://dev.mysql.com/c-api-prepared-statement-type-codes.html
The buffer_type member of MYSQL_BIND structures indicates the data type of the C language variable bound to a statement parameter or result set column. For input, buffer_type indicates the type of the variable containing the value to be sent to the ...
https://dev.mysql.com/no-matching-rows.html
If you are comparing FLOAT or DOUBLE columns with numbers that have decimals, you cannot use equality (=) comparisons. This problem is common in most computer languages because not all floating-point values can be stored with exact precision. In ...
https://dev.mysql.com/window-function-optimization.html
For example, adding a very small floating-point value to a very large value causes the very small value to be “hidden” by the large value. Loss of precision due to inverse aggregation is a factor only for operations on floating-point ... Window ...
https://dev.mysql.com/create-table.html
AUTO_INCREMENT An integer or floating-point column can have the additional attribute AUTO_INCREMENT. Columns using BLOB, TEXT, SET, ENUM, BIT, or spatial data types are not permitted; columns that use floating-point number types are also not ...
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