core/src/main/java/com/orientechnologies/orient/core/sql/executor/OMatchExecutionPlanner.java
private Map<String, Set<String>> getDependencies(Pattern pattern) {
    Map<String, Set<String>> result = new HashMap<String, Set<String>>();

    for (PatternNode node : pattern.aliasToNode.values()) {
      Set<String> currentDependencies = new HashSet<String>();

      OWhereClause filter = aliasFilters.get(node.alias);
      if (filter != null && filter.getBaseExpression() != null) {
        List<String> involvedAliases = filter.getBaseExpression().getMatchPatternInvolvedAliases();
        if (involvedAliases != null) {
          currentDependencies.addAll(involvedAliases);
        }
      }

      result.put(node.alias, currentDependencies);
    }

    return result;
  }
private Map<String, Set<String>> getDependencies(Pattern pattern) {
    Map<String, Set<String>> result = new HashMap<String, Set<String>>();

    for (PatternNode node : pattern.aliasToNode.values()) {
      Set<String> currentDependencies = new HashSet<String>();

      OWhereClause filter = aliasFilters.get(node.alias);
      if (filter != null && filter.getBaseExpression() != null) {
        List<String> involvedAliases = filter.getBaseExpression().getMatchPatternInvolvedAliases();
        if (involvedAliases != null) {
          currentDependencies.addAll(involvedAliases);
        }
      }

      result.put(node.alias, currentDependencies);
    }

    return result;
  }
private Map < String , Set < String > > getDependencies ( Pattern pattern ) { Map < String , Set < String > > result = new HashMap < String , Set < String > > ( ) ; for ( PatternNode node : pattern . aliasToNode . values ( ) ) { Set < String > currentDependencies = new HashSet < String > ( ) ; OWhereClause filter = aliasFilters . get ( node . alias ) ; if ( filter != null && filter . getBaseExpression ( ) != null ) { List < String > involvedAliases = filter . getBaseExpression ( ) . getMatchPatternInvolvedAliases ( ) ; if ( involvedAliases != null ) { currentDependencies . addAll ( involvedAliases ) ; } } result . put ( node . alias , currentDependencies ) ; } return result ; }
Calculate the set of dependency aliases for each alias in the pattern.

@param pattern

@return map of alias to the set of aliases it depends on
Calculate the set of dependency aliases for each alias in the pattern .