[PATCH] COLUMN_CHECK fails on valid data

COLUMN_CHECK fails on valid data

SELECT COLUMN_CHECK(COLUMN_CREATE('a',0,'b','1'))

Result: 0 (failed)

SELECT COLUMN_CHECK(COLUMN_CREATE('a',1,'b','1'))

Result: 1 (correct)

SELECT COLUMN_JSON(COLUMN_CREATE('a',0,'b','1'))

Result: {"a":0,"b":"1"} (correct)

SELECT COLUMN_JSON(COLUMN_CREATE('a',1,'b','1'))

Result: {"a":1,"b":"1"} (correct)

It appears that COLUMN_CHECK fails when one of the dynamic column values is set to INTEGER 0, and only when there is more than 1 dynamic column present. COLUMN_JSON is able to parse the results properly, so the returned values from COLUMN_CREATE appears to be correct.