ABAP Select data from SAP table RELS_INTERSECTION_ER_LA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RELS_INTERSECTION_ER_LA table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to RELS_INTERSECTION_ER_LA. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the RELS_INTERSECTION_ER_LA table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_RELS_INTERSECTION_ER_LA TYPE STANDARD TABLE OF RELS_INTERSECTION_ER_LA,
      WA_RELS_INTERSECTION_ER_LA TYPE RELS_INTERSECTION_ER_LA,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <RELS_INTERSECTION_ER_LA> TYPE RELS_INTERSECTION_ER_LA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RELS_INTERSECTION_ER_LA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RELS_INTERSECTION_ER_LA
  INTO TABLE IT_RELS_INTERSECTION_ER_LA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELS_INTERSECTION_ER_LA
*  INTO TABLE @DATA(IT_RELS_INTERSECTION_ER_LA2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_RELS_INTERSECTION_ER_LA INDEX 1 INTO DATA(WA_RELS_INTERSECTION_ER_LA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RELS_INTERSECTION_ER_LA ASSIGNING <RELS_INTERSECTION_ER_LA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELS_INTERSECTION_ER_LA>-COUNTRY = 1.
<RELS_INTERSECTION_ER_LA>-STATE = 1.
<RELS_INTERSECTION_ER_LA>-DISTRICT = 1.
<RELS_INTERSECTION_ER_LA>-MUNICIPAL = 1.
<RELS_INTERSECTION_ER_LA>-SUBDISTRICT = 1.

ENDLOOP.

LOOP AT IT_RELS_INTERSECTION_ER_LA INTO WA_RELS_INTERSECTION_ER_LA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELS_INTERSECTION_ER_LA-ERPAGENO, sy-vline,
  WA_RELS_INTERSECTION_ER_LA-REGION, sy-vline,
  WA_RELS_INTERSECTION_ER_LA-LOCALSUBDISTRICT, sy-vline,
  WA_RELS_INTERSECTION_ER_LA-LANDPARCELNUMBER, sy-vline,
  WA_RELS_INTERSECTION_ER_LA-PARCELOFLAND, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RELS_INTERSECTION_ER_LA you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_RELS_INTERSECTION_ER_LA TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_RELS_INTERSECTION_ER_LA INTO WA_RELS_INTERSECTION_ER_LA.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field LANDPARCELNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RELS_INTERSECTION_ER_LA-LANDPARCELNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELS_INTERSECTION_ER_LA-LANDPARCELNUMBER.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RELS_INTERSECTION_ER_LA_STR, 
COUNTRY TYPE STRING,
STATE TYPE STRING,
DISTRICT TYPE STRING,
MUNICIPAL TYPE STRING,
SUBDISTRICT TYPE STRING,
ERPAGENO TYPE STRING,
REGION TYPE STRING,
LOCALSUBDISTRICT TYPE STRING,
LANDPARCELNUMBER TYPE STRING,
PARCELOFLAND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELS_INTERSECTION_ER_LA_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_RELS_INTERSECTION_ER_LA_STR-COUNTRY sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-STATE sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-DISTRICT sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-MUNICIPAL sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-SUBDISTRICT sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-ERPAGENO sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-REGION sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-LOCALSUBDISTRICT sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-LANDPARCELNUMBER sy-vline 
WA_RELS_INTERSECTION_ER_LA_STR-PARCELOFLAND sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.