Help Center/ GaussDB/ Developer Guide(Distributed_V2.0-8.x)/ SQL Reference/ Functions and Operators/ Network Address Functions and Operators/ macaddr Functions
Updated on 2025-08-19 GMT+08:00
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macaddr Functions

trunc(macaddr)

Description: Sets last 3 bytes to zero.

Return type: macaddr. The trunc(macaddr) function returns a MAC address with the last 3 bytes set to zero.

Example:

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gaussdb=# SELECT trunc(macaddr '12:34:56:78:90:ab') AS RESULT;
      result       
-------------------
 12:34:56:00:00:00
(1 row)

The macaddr type also supports the standard relational operators (such as > and <=) for lexicographical ordering, and the bitwise arithmetic operators (~, & and |) for NOT, AND and OR.