docs: private static String getUpdateSql() {
          if (updateSql == null) {
              updateSql =
                      "UPDATE "
                              + LOCK_TABLE
                              + " SET "
                              + EXPIRATION_TIME_COLUMN
                              + EQ
                              + "?, "
                              + LOCK_TYPE_COLUMN
                              + EQ
                              + "?"
                              + " WHERE "
                              + ENTITY_TYPE_COLUMN
                              + EQ
                              + "?"
                              + " AND "
                              + ENTITY_KEY_COLUMN
                              + EQ
                              + "?"
                              + " AND "
                              + LOCK_OWNER_COLUMN
                              + EQ
                              + "?"
                              + " AND "
                              + EXPIRATION_TIME_COLUMN
                              + EQ
                              + "?"
                              + " AND "
                              + LOCK_TYPE_COLUMN
                              + EQ
                              + "?";
          }
          return updateSql;
      }