addColumn method
Adds the given column to the specified table.
Implementation
Future<void> addColumn(TableInfo table, GeneratedColumn column) async {
final context = _createContext();
context.buffer
.write('ALTER TABLE ${escapeIfNeeded(table.$tableName)} ADD COLUMN ');
column.writeColumnDefinition(context);
context.buffer.write(';');
return _issueCustomQuery(context.sql);
}