ABAP Select data from SAP table /INCMD/EXT_REL_LOC_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /INCMD/EXT_REL_LOC_DATA
*  INTO TABLE @DATA(IT_/INCMD/EXT_REL_LOC_DATA2).
*--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_/INCMD/EXT_REL_LOC_DATA INDEX 1 INTO DATA(WA_/INCMD/EXT_REL_LOC_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</INCMD/EXT_REL_LOC_DATA>-LOCEXT = 1.
</INCMD/EXT_REL_LOC_DATA>-LOCEXT = 1.
</INCMD/EXT_REL_LOC_DATA>-ICNO = 1.
</INCMD/EXT_REL_LOC_DATA>-PRGUID = 1.
</INCMD/EXT_REL_LOC_DATA>-SNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/INCMD/EXT_REL_LOC_DATA-LOCID, sy-vline,
  WA_/INCMD/EXT_REL_LOC_DATA-VALIDFR, sy-vline,
  WA_/INCMD/EXT_REL_LOC_DATA-RELTYPE, sy-vline,
  WA_/INCMD/EXT_REL_LOC_DATA-RESCODE, sy-vline,
  WA_/INCMD/EXT_REL_LOC_DATA-USEUPFLG, sy-vline,
  WA_/INCMD/EXT_REL_LOC_DATA-USEUPDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/INCMD/EXT_REL_LOC_DATA 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_/INCMD/EXT_REL_LOC_DATA 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_/INCMD/EXT_REL_LOC_DATA INTO WA_/INCMD/EXT_REL_LOC_DATA.


*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_/INCMD/EXT_REL_LOC_DATA-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/INCMD/EXT_REL_LOC_DATA-UNIT.
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_/INCMD/EXT_REL_LOC_DATA_STR, 
LOCEXT TYPE STRING,
LOCEXT TYPE STRING,
ICNO TYPE STRING,
PRGUID TYPE STRING,
SNO TYPE STRING,
LOCID TYPE STRING,
VALIDFR TYPE STRING,
RELTYPE TYPE STRING,
RESCODE TYPE STRING,
USEUPFLG TYPE STRING,
USEUPDATE TYPE STRING,
USEUPQTY TYPE STRING,
UNIT TYPE STRING,
DENQUANT TYPE STRING,
NUMQUANT TYPE STRING,
FREETEXT TYPE STRING,
EXHAUSTDT TYPE STRING,
BACKCASTDT TYPE STRING,
EXHWRNDT TYPE STRING,
RULEPROF TYPE STRING,
PRIOFACT TYPE STRING,
DMNDPCNT TYPE STRING,
REALIGNSTDT TYPE STRING,
PREVALIDFR TYPE STRING,
TIMEFR TYPE STRING,
TIMETO TYPE STRING,
ACTIVITY TYPE STRING,
SUCCPDTRECEIPTDT TYPE STRING,
FINALDT TYPE STRING,
ICOST TYPE STRING,
FCOST TYPE STRING,
UPDFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/INCMD/EXT_REL_LOC_DATA_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_/INCMD/EXT_REL_LOC_DATA_STR-LOCEXT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-LOCEXT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-ICNO sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-PRGUID sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-SNO sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-LOCID sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-VALIDFR sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-RELTYPE sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-RESCODE sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-USEUPFLG sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-USEUPDATE sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-USEUPQTY sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-UNIT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-DENQUANT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-NUMQUANT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-FREETEXT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-EXHAUSTDT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-BACKCASTDT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-EXHWRNDT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-RULEPROF sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-PRIOFACT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-DMNDPCNT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-REALIGNSTDT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-PREVALIDFR sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-TIMEFR sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-TIMETO sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-ACTIVITY sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-SUCCPDTRECEIPTDT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-FINALDT sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-ICOST sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-FCOST sy-vline 
WA_/INCMD/EXT_REL_LOC_DATA_STR-UPDFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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