SQL Error during usage of "Re-build Multilanguage Fields" functionality

In global scale phpMyAdmin displays "None", when "DEFAULT ..." statement was omitted during table creation/column adding. When we have default value, then it is used. When we don't have default value, then default value will be: NULL for fields, that can be NULL empty string for textual fields 0 for numeric fields We need to updated following places to reflect that: remove "DEFAULT ..." statement from "install_schema.sql" file, when it matches default value auto-assigned from previous list update unit config validator to support ommited "DEFAULT ..." statements update translatable field auto-creator (partially what Sergey posted) to skip "DEFAULT ..." in ALTER TABLE statements, when field's default value matches the one, that MySQL will use automatically This all can be successfully done based on DESCRIBE results. Omitted "DEFAULT ..." statement is shown differently on DESCRIBE sql only since 5.x version of MySQL. Although omitted "DEFAULT ..." statement was allowed in 4.x version of MySQL too, but DESCRIBE showed actual default value, what MySQL will use for NOT NULL fields and not NULL as 5.x MySQL does.