Error in reading from table after doing an alter column type

[samuel-cc-4451]

Steps to repoduce:

CREATE FOREIGN TABLE simpleTable  (simpleColumn int) SERVER cstore_server;
INSERT INTO simpleTable SELECT * FROM generate_series(1,100000);
ALTER TABLE simpleTable ALTER COLUMN simpleColumn TYPE float ;
SELECT * FROM simpleTable; 

The select query in the end produces this error stating " ERROR: insufficient data left in datum buffer"
All queries other than the select query ran without errors