Revert "remove stringcolumn's maxsize propery"

This reverts commit b85c8c945dc5f85ddc7ddf7822dc538ca3d7808f.
Revert "Revert "remove stringcolumn's maxsize propery""

This reverts commit 407dd8d14b7e35d473b0b7b2fb07a96b7b7c0efa.