SRID is not preserved in UNION, VIEW, MIN, MAX

DROP TABLE IF EXISTS t1;

CREATE TABLE t1 (a POINT REF_SYSTEM_ID=10);

DROP TABLE IF EXISTS t2;

CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT a FROM t1;

SELECT G_TABLE_NAME,G_GEOMETRY_COLUMN,SRID FROM INFORMATION_SCHEMA.GEOMETRY_COLUMNS;

+--------------+-------------------+------+

| G_TABLE_NAME | G_GEOMETRY_COLUMN | SRID |

+--------------+-------------------+------+

| t1           | a                 |   10 |

| t2           | a                 |    0 |

+--------------+-------------------+------+

DROP TABLE IF EXISTS t1;

DROP VIEW IF EXISTS v1;

DROP TABLE IF EXISTS t2;

CREATE TABLE t1 (p POINT REF_SYSTEM_ID=10);

CREATE VIEW v1 AS SELECT p FROM t1;

CREATE TABLE t2 AS SELECT MIN(p) AS p FROM t1 UNION SELECT p FROM v1;

SHOW CREATE TABLE t2;

SELECT G_TABLE_NAME,G_GEOMETRY_COLUMN,SRID FROM INFORMATION_SCHEMA.GEOMETRY_COLUMNS;

+-------+----------------------------------------------------------------------------------------+

| Table | Create Table                                                                           |

+-------+----------------------------------------------------------------------------------------+

| t2    | CREATE TABLE `t2` (

  `p` geometry DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=latin1 |

+-------+----------------------------------------------------------------------------------------+

+--------------+-------------------+------+

| G_TABLE_NAME | G_GEOMETRY_COLUMN | SRID |

+--------------+-------------------+------+

| t1           | p                 |   10 |

| t2           | p                 |    0 |

| v1           | p                 |   10 |

+--------------+-------------------+------+