public TokenRewriteStream getViewTokenRewriteStream(String viewFullyQualifiedName) {
    return viewsTokenRewriteStreams.get(viewFullyQualifiedName);
  }
@return the token rewrite stream being used to parse the current top-level
        SQL statement, or null if it isn't available (e.g. for parser
        tests)
ql/src/java/org/apache/hadoop/hive/ql/Context.java