private void checkNoScan(ASTNode tree) {
    if (tree.getChildCount() > 1) {
      ASTNode child0 = (ASTNode) tree.getChild(0);
      ASTNode child1;
      if (child0.getToken().getType() == HiveParser.TOK_TAB) {
        child0 = (ASTNode) child0.getChild(0);
        if (child0.getToken().getType() == HiveParser.TOK_TABNAME) {
          child1 = (ASTNode) tree.getChild(1);
          if (child1.getToken().getType() == HiveParser.KW_NOSCAN) {
            this.noscan = true;
          }
        }
      }
    }
  }
It will check if this is analyze ... compute statistics noscan
@param tree
ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java