MariaDB starting with 10.8
--------------------------
Introduced in MariaDB 10.8.0 to compute a cyclic redundancy check (CRC) value
using the Castagnoli polynomial.

Syntax
------

CRC32C([par,]expr)

Description
-----------

MariaDB has always included a native unary function CRC32() that computes the
CRC-32 of a string using the ISO 3309 polynomial that used by zlib and many
others.

InnoDB and MyRocks use a different polynomial, which was implemented in SSE4.2
instructions that were introduced in the Intel Nehalem microarchitecture. This
is commonly called CRC-32C (Castagnoli).

The CRC32C function uses the Castagnoli polynomial.

This allows SELECT…INTO DUMPFILE to be used for the creation of files with
valid checksums, such as a logically empty InnoDB redo log file ib_logfile0
corresponding to a particular log sequence number.

The optional parameter allows the checksum to be computed in pieces:
CRC32C('MariaDB')=CRC32C(CRC32C('Maria'),'DB').

Examples
--------

SELECT CRC32C('MariaDB');
+-------------------+
| CRC32C('MariaDB') |
+-------------------+
|         809606978 |
+-------------------+

SELECT CRC32C(CRC32C('Maria'),'DB');
+------------------------------+
| CRC32C(CRC32C('Maria'),'DB') |
+------------------------------+
|                    809606978 |
+------------------------------+

URL: https://mariadb.com/kb/en/crc32c/