HEX
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Returns the hexadecimal representation of numeric, string, or binary data.
Note
Beginning with version 8.HEX() calculates the values of real and decimal numbers is changed to be more in line with how MySQL HEX() works.HEX() will return updated values.
Syntax
HEX (expression)
Arguments
-
expression: any valid expression.
This can be a column name, literal, or the return value of another function.
Return Type
Upper-case hexadecimal string.
Examples
SELECT HEX(1234);
+-----------+
| HEX(1234) |
+-----------+
| 4D2 |
+-----------+SELECT HEX('1234');
+-------------+
| HEX('1234') |
+-------------+
| 31323334 |
+-------------+SELECT HEX('ohai');
+-------------+
| HEX('ohai') |
+-------------+
| 6F686169 |
+-------------+Note
This function operates on the binary representation of the given argument.hex(1234) and hex('1234') yield different values.hex( number ) cannot be fed directly into UNHEX to get back the literal number 1234.
Warning
Deprecation Notice
String functions, such as CONCAT, LENGTH, SUBSTR, and HEX, previously operated on the JSON representation of a vector, interpreted as a string.
If you truly intend to use a string function on the JSON string representation of a vector, you can write code in the following way so that it will run the same way before and after this behavior change.
Suppose that vec is a vector-type value and stringfunc is any string function and you have expression:
stringfunc(vec)
you can change it to:
stringfunc(vec :> json)
Related Topics
Last modified: June 6, 2024