core/src/main/java/com/orientechnologies/orient/core/sql/parser/OCreateIndexStatement.java
private String[] calculateProperties(OCommandContext ctx) {
    if (propertyList == null) {
      return null;
    }
    return propertyList.stream().map(x -> x.getCompleteKey()).collect(Collectors.toList()).toArray(new String[] {});
  }
private String[] calculateProperties(OCommandContext ctx) {
    if (propertyList == null) {
      return null;
    }
    return propertyList.stream().map(x -> x.getCompleteKey()).collect(Collectors.toList()).toArray(new String[] {});
  }
private String [ ] calculateProperties ( OCommandContext ctx ) { if ( propertyList == null ) { return null ; } return propertyList . stream ( ) . map ( x -> x . getCompleteKey ( ) ) . collect ( Collectors . toList ( ) ) . toArray ( new String [ ] { } ) ; }
*
returns the list of property names to be indexed

@param ctx
@return
* returns the list of property names to be indexed