ABAP Select data from SAP table /PLMB/S_RTG_RCA_LNK_DATA_ATTR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PLMB/S_RTG_RCA_LNK_DATA_ATTR 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 /PLMB/S_RTG_RCA_LNK_DATA_ATTR. 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 /PLMB/S_RTG_RCA_LNK_DATA_ATTR 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_/PLMB/S_RTG_RCA_LNK_DATA_ATTR TYPE STANDARD TABLE OF /PLMB/S_RTG_RCA_LNK_DATA_ATTR,
      WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR TYPE /PLMB/S_RTG_RCA_LNK_DATA_ATTR,
      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: </PLMB/S_RTG_RCA_LNK_DATA_ATTR> TYPE /PLMB/S_RTG_RCA_LNK_DATA_ATTR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PLMB/S_RTG_RCA_LNK_DATA_ATTR
  INTO TABLE IT_/PLMB/S_RTG_RCA_LNK_DATA_ATTR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PLMB/S_RTG_RCA_LNK_DATA_ATTR
*  INTO TABLE @DATA(IT_/PLMB/S_RTG_RCA_LNK_DATA_ATTR2).
*--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_/PLMB/S_RTG_RCA_LNK_DATA_ATTR INDEX 1 INTO DATA(WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PLMB/S_RTG_RCA_LNK_DATA_ATTR ASSIGNING </PLMB/S_RTG_RCA_LNK_DATA_ATTR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PLMB/S_RTG_RCA_LNK_DATA_ATTR>-SCO_NAME = 1.
</PLMB/S_RTG_RCA_LNK_DATA_ATTR>-SCO_TYPE = 1.
</PLMB/S_RTG_RCA_LNK_DATA_ATTR>-SCO_VERSION = 1.
</PLMB/S_RTG_RCA_LNK_DATA_ATTR>-LNK_TYPE = 1.
</PLMB/S_RTG_RCA_LNK_DATA_ATTR>-LNK_NUMBER = 1.

ENDLOOP.

LOOP AT IT_/PLMB/S_RTG_RCA_LNK_DATA_ATTR INTO WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-SOURCE_OBJ_ID, sy-vline,
  WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-SOURCE_OBJ_TYPE, sy-vline,
  WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-OBJ_ID4GSS, sy-vline,
  WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-OBJ_TYPE4GSS, sy-vline,
  WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-MAX_ELEM_LEVEL, sy-vline,
  WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-PATH_HASH_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR 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_/PLMB/S_RTG_RCA_LNK_DATA_ATTR 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_/PLMB/S_RTG_RCA_LNK_DATA_ATTR INTO WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR.


*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 CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-UNIT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit MATN1, internal->external for field ALLIGNED_MAT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-ALLIGNED_MAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR-ALLIGNED_MAT.
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_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR, 
SCO_NAME TYPE STRING,
SCO_TYPE TYPE STRING,
SCO_VERSION TYPE STRING,
LNK_TYPE TYPE STRING,
LNK_NUMBER TYPE STRING,
SOURCE_OBJ_ID TYPE STRING,
SOURCE_OBJ_TYPE TYPE STRING,
OBJ_ID4GSS TYPE STRING,
OBJ_TYPE4GSS TYPE STRING,
MAX_ELEM_LEVEL TYPE STRING,
PATH_HASH_KEY TYPE STRING,
PL_PATH_HASH_KEY TYPE STRING,
PL_LNK_GUID TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
ASSEMBLY_SEQ TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
PLNKN TYPE STRING,
ZUONR TYPE STRING,
MARK_DEL_IND TYPE STRING,
ALLIGNED_MAT TYPE STRING,
ALLIGNED_IND TYPE STRING,
CREADAT TYPE STRING,
CREABY TYPE STRING,
CHNGDAT TYPE STRING,
CHNGBY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_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_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-SCO_NAME sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-SCO_TYPE sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-SCO_VERSION sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-LNK_TYPE sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-LNK_NUMBER sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-SOURCE_OBJ_ID sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-SOURCE_OBJ_TYPE sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-OBJ_ID4GSS sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-OBJ_TYPE4GSS sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-MAX_ELEM_LEVEL sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PATH_HASH_KEY sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PL_PATH_HASH_KEY sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PL_LNK_GUID sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-QUANTITY sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-UNIT sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-ASSEMBLY_SEQ sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PLNTY sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PLNNR sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PLNAL sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PLNFL sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-PLNKN sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-ZUONR sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-MARK_DEL_IND sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-ALLIGNED_MAT sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-ALLIGNED_IND sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-CREADAT sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-CREABY sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-CHNGDAT sy-vline 
WA_/PLMB/S_RTG_RCA_LNK_DATA_ATTR_STR-CHNGBY sy-vline      INTO ld_text SEPARATED BY SPACE.

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