Validates and deletes a column in a table in schema.
Source
void deleteColumn(String tableName, String columnName) { var table = schema.tableForName(tableName); if (table == null) { throw new SchemaException("Table $tableName does not exist."); } var column = table.columnForName(columnName); if (column == null) { throw new SchemaException("Column $columnName does not exists."); } table.removeColumn(column); if (store != null) { commands.addAll(store.deleteColumn(table, column)); } }