mariadb/mysql-test/suite/tokudb/t/change_column_varchar.test

# test that varchar expansion is done inplace while varchar shrinkage is not

--disable_warnings
DROP TABLE IF EXISTS t;
--enable_warnings

SET SESSION TOKUDB_DISABLE_SLOW_ALTER=ON;

CREATE TABLE t (a VARCHAR(1)) ENGINE=TokuDB;
SHOW CREATE TABLE t;

# 1->1
let $i=1
EVAL ALTER TABLE t CHANGE COLUMN a a VARCHAR($i);

# 1->2 ... 1023->1024 is supported
# 1024 is an arbitrary limit >= 256
let $i=2;
while ($i <= 1024)
{
    # $i-1 -> $i
    EVAL ALTER TABLE t CHANGE COLUMN a a VARCHAR($i);
    # $i -> $i
    EVAL ALTER TABLE t CHANGE COLUMN a a VARCHAR($i); 
    inc $i;
}

# shrink from 1024->$i where $i < 1024 is not supported
let $i=1023;
while ($i > 0)
{
    --replace_regex /MariaDB/XYZ/ /MySQL/XYZ/
    --error ER_UNSUPPORTED_EXTENSION
    EVAL ALTER TABLE t CHANGE COLUMN a a VARCHAR($i);
    dec $i;
}

DROP TABLE t;