Build tested: 1.4.3-1
OS: centos 7
Stack: single server

CREATE TABLE ... ENGINE=columnstore AS SELECT ...COUNT() ... FROM ... GROUP BY ... throws syntax error.

MariaDB [db1]> SELECT version();
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-------------------

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1 row in set (0.000 sec)

MariaDB [db1]> CREATE TABLE src (c0 int, c1 int);
Query OK, 0 rows affected (0.016 sec)

MariaDB [db1]> INSERT INTO src VALUES (1,1),(1,1),(1,1),(2,2),(2,2),(2,2),(3,3),(3,3),(3,3);
Query OK, 9 rows affected (0.005 sec)
Records: 9 Duplicates: 0 Warnings: 0

MariaDB [db1]> CREATE TABLE tgt1 AS SELECT c0, count(c0) FROM src GROUP BY c0;
Query OK, 3 rows affected (0.020 sec)
Records: 3 Duplicates: 0 Warnings: 0

MariaDB [db1]> SELECT * FROM tgt1;
---------------+

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

---------------+
3 rows in set (0.001 sec)

MariaDB [db1]> CREATE TABLE tgt2 engine = columnstore AS SELECT c0, count(c0) FROM src GROUP BY c0;
ERROR 1178 (42000): The storage engine for the table doesn't support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.
MariaDB [db1]>