IS_IPV4_COMPAT

Check if an IPv6 address is IPv4-compatible. This function returns 1 if the binary IPv6 address represents an IPv4-compatible address.

Syntax

IS_IPV4_COMPAT(expr)

Description

Returns 1 if a given numeric binary string IPv6 address, such as returned by INET6_ATON(), is IPv4-compatible, otherwise returns 0.

Current

When the argument is not INET6, automatic implicit CAST to INET6 is applied. As a consequence, IS_IPV4_COMPAT now understands arguments in both text representation and binary(16) representation.

< 10.5

Examples

SELECT IS_IPV4_COMPAT(INET6_ATON('::10.0.1.1'));
+------------------------------------------+
| IS_IPV4_COMPAT(INET6_ATON('::10.0.1.1')) |
+------------------------------------------+
|                                        1 |
+------------------------------------------+

SELECT IS_IPV4_COMPAT(INET6_ATON('::48f3::d432:1431:ba23:846f'));
+-----------------------------------------------------------+
| IS_IPV4_COMPAT(INET6_ATON('::48f3::d432:1431:ba23:846f')) |
+-----------------------------------------------------------+
|                                                         0 |
+-----------------------------------------------------------+

_{This page is licensed: CC BY-SA / Gnu FDL}