Issues in Netweaver Gateway concepts.

Hello Gateway Gurus,

      I had been carrying out OData service activities in Netweaver Gateway, Facing issues in understanding the functionalities and concepts in it.. I hope this post will be helpful for getting all basics understanding cleared.

NOTE: Please consider doubts mentioned below as Independent of each other also these images are not related to each other.

1. I am bit puzzled in the properties section of the data model... as in what is the relevance of the checkboxes as shown below picture..  I have noticed these reflected in $metadata of the service as well).

 

 

 

2. Regarding the other confusion its related to cardinality..

When we do we go for Cardinality as "N" and when for Cardinality as "M"

 

 

3. I have used the following lines of code many times...

sharing the snapshot for the same.

 

but yesterday I was in worry about what the IO_EXPAND-> Compare_to mean as I didn't know its working..

also the use of lv_compare_result ???

 

like for example, if I have to specify two children , but Even If I specify 'SOItems' here , I get 'SOSchedules' as well  ...

 

 

 

Thanking you in advance,

Hope to get many helpful hit on this..

 

BEST REGARDS,

Pavan Golesar.