DROP DATABASE IF EXISTS mcs73_db; CREATE DATABASE mcs73_db; USE mcs73_db; CREATE TABLE t1(t1_int INT, t1_text TEXT)ENGINE=Columnstore; CREATE INDEX idx1 ON t1(t1_int); ERROR 42000: Too many keys specified; max 0 keys allowed ALTER TABLE t1 ADD INDEX(t1_int); ERROR 42000: Too many keys specified; max 0 keys allowed ALTER TABLE t1 ADD UNIQUE INDEX(t1_int); ERROR 42000: Too many keys specified; max 0 keys allowed ALTER TABLE t1 ADD PRIMARY KEY(t1_int); ERROR 42000: Too many keys specified; max 0 keys allowed ALTER TABLE t1 ADD KEY(t1_int); ERROR 42000: Too many keys specified; max 0 keys allowed CREATE TABLE t2(t2_int INT, t2_varchar VARCHAR(10), t2_datetime DATETIME, PRIMARY KEY(t2_int))ENGINE=Columnstore; ERROR 42000: Too many keys specified; max 0 keys allowed CREATE TABLE t2(t2_int INT, t2_varchar VARCHAR(10), KEY(t2_int))ENGINE=Columnstore; ERROR 42000: Too many keys specified; max 0 keys allowed CREATE TABLE t2(t2_int INT, t2_varchar VARCHAR(10), UNIQUE INDEX(t2_int))ENGINE=Columnstore; ERROR 42000: Too many keys specified; max 0 keys allowed CREATE TABLE t2(t2_int INT, t2_varchar VARCHAR(10), INDEX(t2_int))ENGINE=Columnstore; ERROR 42000: Too many keys specified; max 0 keys allowed DROP DATABASE mcs73_db;