void addColumn(String tableName, SchemaColumn column, { String unencodedInitialValue })

Validates and adds a column to a table in schema.

Source 

void addColumn(String tableName, SchemaColumn column, {String unencodedInitialValue}) {
  var table = schema.tableForName(tableName);
  if (table == null) {
    throw new SchemaException("Table $tableName does not exist.");
  }

  table.addColumn(column);
  if (store != null) {
    commands.addAll(store.addColumn(table, column, unencodedInitialValue: unencodedInitialValue));
  }
}