core/src/main/java/com/orientechnologies/orient/core/sql/OCommandExecutorSQLAbstract.java
protected String parseLock() throws OCommandSQLParsingException {
    final String lockStrategy = parserNextWord(true);

    if (!lockStrategy.equalsIgnoreCase("DEFAULT") && !lockStrategy.equalsIgnoreCase("NONE")
        && !lockStrategy.equalsIgnoreCase("RECORD"))
      throwParsingException("Invalid " + KEYWORD_LOCK + " value set to '" + lockStrategy
          + "' but it should be NONE (default) or RECORD. Example: " + KEYWORD_LOCK + " RECORD");

    return lockStrategy;
  }
protected String parseLock() throws OCommandSQLParsingException {
    final String lockStrategy = parserNextWord(true);

    if (!lockStrategy.equalsIgnoreCase("DEFAULT") && !lockStrategy.equalsIgnoreCase("NONE")
        && !lockStrategy.equalsIgnoreCase("RECORD"))
      throwParsingException("Invalid " + KEYWORD_LOCK + " value set to '" + lockStrategy
          + "' but it should be NONE (default) or RECORD. Example: " + KEYWORD_LOCK + " RECORD");

    return lockStrategy;
  }
Parses the lock keyword if found.