CORRESPONDING and LINES Syntax in ABAP 7.4/7.5

         

CORRESPONDING and LINES Syntax in ABAP 7.4/7.5

Corresponding Operator

In the older ABAP syntax, move corresponding is used to copy the content of one internal table to another internal table. In the new syntax the move corresponding is replaced with corresponding #( ).

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Below are few examples.

1. Copy records from one internal to another internal table.
   
   

   MOVE CORRESPONDING ITAB1 TO ITAB2. “Old syntax

   ITAB2 = CORRESPONDING #( ITAB1 ). “New syntax

2. Copy content from another internal while preserving the existing records.
   
   

   MOVE-CORRESPONDING it_tab1 TO it_tab KEEPING TARGET LINES.

   it_tab = CORRESPONDING #( BASE ( it_tab ) it_tab1 ).

   
   
3. To discard duplicate lines and avoid runtime errors.
   
   

   itab = CORRESPONDING #( itab2 DISCARDING DUPLICATES ).

   
   
4. Specify mapping fields from source to target or exclude some fields.
   
   

   it_tab2 = CORRESPONDING #( itab1 MAPPING a = c b = d EXCEPT e ).

5. To copy content from deep internal tables. 

              itab_deep2 = CORRESPONDING #( DEEP itab_deep1 ).
              itab_deep2 = CORRESPONDING #( DEEP BASE ( itab_deep2 ) itab_deep1 ).
              MOVE-CORRESPONDING itab_deep1 TO itab_deep2 EXPANDING NESTED TABLES.
              MOVE-CORRESPONDING itab_deep1 TO itab_deep2 EXPANDING NESTED TABLES KEEPING TARGET LINES.

LINES instead of DESCRIBE TABLE

To check the no. of records in internal table use the below code.

DATA(lv_lines) = lines( it_tab ). “New Syntax
DESCRIBE TABLE it_tab LINES lv_lines. “Old Syntax