code: private void addEditorSpecificFields(Connection connection, String tablePrefix, Table table) throws SQLException {
          LOG.info("Adding any missing columns for {}", tablePrefix + table.name);
          Statement statement = connection.createStatement();
          for (Field field : table.editorFields()) {
              // The following statement requires PostgreSQL 9.6+.
              String addColumnSql = String.format("ALTER TABLE %s ADD COLUMN IF NOT EXISTS %s %s",
                      tablePrefix + table.name,
                      field.name,
                      field.getSqlTypeName());
              LOG.info(addColumnSql);
              statement.execute(addColumnSql);
          }
      }
docs: Add columns for any required, optional, or editor fields that don't already exist as columns on the table.
  This method contains a SQL statement that requires PostgreSQL 9.6+.