ST_ENVELOPE of GEOMETRYCOLLECTION EMPTY returns NULL and not GEOMETRYCOLLECTION EMPTY

[Philip Stoev]

in postgis:

select ST_ASTEXT(envelope(ST_GEOMCOLLFROMTEXT('GEOMETRYCOLLECTION EMPTY')));

returns GEOMETRYCOLLECTION EMPTY

in MariaDB, it returns NULL

[Philip Stoev (pstoev-askmonty)]

This is till repeatable . In rev 3006, you have recorded a NULL in the test case:

+select ST_ASTEXT(envelope(ST_GEOMCOLLFROMTEXT('GEOMETRYCOLLECTION EMPTY')));
+ST_ASTEXT(envelope(ST_GEOMCOLLFROMTEXT('GEOMETRYCOLLECTION EMPTY')))
+NULL