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UNHEX

For a string argument str, UNHEX(str) interprets each pair of characters in the argument as a hexadecimal number and converts it to the byte represented by the number. The return value is a binary string.

Syntax​

UNHEX(expr)

Arguments​

ArgumentsDescription
exprThe string.

Examples​

SELECT UNHEX('6461746162656e64');
+---------------------------+
| UNHEX('6461746162656e64') |
+---------------------------+
| databend                  |
+---------------------------+

SELECT UNHEX(HEX('string'));
+----------------------+
| UNHEX(HEX('string')) |
+----------------------+
| string               |
+----------------------+