public void addAggregationExprsForClause(String clause, Map<String, ASTNode> aggregationTrees) {
    if (destToAggregationExprs.containsKey(clause)) {
      destToAggregationExprs.get(clause).putAll(aggregationTrees);
    } else {
      destToAggregationExprs.put(clause, aggregationTrees);
    }
  }
Maping from table/subquery aliases to all the associated lateral view nodes.
ql/src/java/org/apache/hadoop/hive/ql/parse/QBParseInfo.java