new-field-populate-default-values.php

<?php
  db_query("
      INSERT IGNORE INTO {field_data_FIELD_NAME} (entity_type, bundle, deleted, entity_id, revision_id, language, delta, VALUE_COLUMNS...)
      SELECT
        'ENTITY TYPE' AS entity_type,
        'BUNDLE' AS bundle,
        0 AS deleted,
        ENTITY ID AS entity_id,
        REVISION ID IF EXISTS ELSE ENTITY ID AS revision_id,
        'und' AS language,
        0 AS delta,
        0 AS field_is_featured_value
      FROM {ENTITY TABLE}
      WHERE BUNDLE = STRING OR THIS FOR TERMS: (select vid from {taxonomy_vocabulary} where machine_name = 'BUNDLE')
    ");