ABAP Select data from SAP table RNPOL_MOVEMENT_FIELDS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNPOL_MOVEMENT_FIELDS 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 RNPOL_MOVEMENT_FIELDS. 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 RNPOL_MOVEMENT_FIELDS 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_RNPOL_MOVEMENT_FIELDS TYPE STANDARD TABLE OF RNPOL_MOVEMENT_FIELDS,
      WA_RNPOL_MOVEMENT_FIELDS TYPE RNPOL_MOVEMENT_FIELDS,
      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: <RNPOL_MOVEMENT_FIELDS> TYPE RNPOL_MOVEMENT_FIELDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPOL_MOVEMENT_FIELDS
*  INTO TABLE @DATA(IT_RNPOL_MOVEMENT_FIELDS2).
*--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_RNPOL_MOVEMENT_FIELDS INDEX 1 INTO DATA(WA_RNPOL_MOVEMENT_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPOL_MOVEMENT_FIELDS>-VISTY = 1.
<RNPOL_MOVEMENT_FIELDS>-DSPTY = 1.
<RNPOL_MOVEMENT_FIELDS>-APCNID = 1.
<RNPOL_MOVEMENT_FIELDS>-EXTKH = 1.
<RNPOL_MOVEMENT_FIELDS>-BWGR1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPOL_MOVEMENT_FIELDS-BWGR2, sy-vline,
  WA_RNPOL_MOVEMENT_FIELDS-DAUER, sy-vline,
  WA_RNPOL_MOVEMENT_FIELDS-NWATARBU, sy-vline,
  WA_RNPOL_MOVEMENT_FIELDS-NWATNOTF, sy-vline,
  WA_RNPOL_MOVEMENT_FIELDS-NWATBEGUT, sy-vline,
  WA_RNPOL_MOVEMENT_FIELDS-NWATMUTT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPOL_MOVEMENT_FIELDS 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_RNPOL_MOVEMENT_FIELDS 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_RNPOL_MOVEMENT_FIELDS INTO WA_RNPOL_MOVEMENT_FIELDS.


*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 EXTKH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPOL_MOVEMENT_FIELDS-EXTKH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPOL_MOVEMENT_FIELDS-EXTKH.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field NWATZUGVA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPOL_MOVEMENT_FIELDS-NWATZUGVA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPOL_MOVEMENT_FIELDS-NWATZUGVA.
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_RNPOL_MOVEMENT_FIELDS_STR, 
VISTY TYPE STRING,
DSPTY TYPE STRING,
APCNID TYPE STRING,
EXTKH TYPE STRING,
BWGR1 TYPE STRING,
BWGR2 TYPE STRING,
DAUER TYPE STRING,
NWATARBU TYPE STRING,
NWATNOTF TYPE STRING,
NWATBEGUT TYPE STRING,
NWATMUTT TYPE STRING,
NWATSPENDE TYPE STRING,
NWATMETHOD TYPE STRING,
NWATTRUNK TYPE STRING,
NWATSUCHT TYPE STRING,
NWATRAUF TYPE STRING,
NWATRZB TYPE STRING,
NWATVPNR TYPE STRING,
NWATBEFRGR TYPE STRING,
NWATSSW TYPE STRING,
NWATBEHAND TYPE STRING,
NWATZUGART TYPE STRING,
NWATABGART TYPE STRING,
NWATZUGVA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPOL_MOVEMENT_FIELDS_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_RNPOL_MOVEMENT_FIELDS_STR-VISTY sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-DSPTY sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-APCNID sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-EXTKH sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-BWGR1 sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-BWGR2 sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-DAUER sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATARBU sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATNOTF sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATBEGUT sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATMUTT sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATSPENDE sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATMETHOD sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATTRUNK sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATSUCHT sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATRAUF sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATRZB sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATVPNR sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATBEFRGR sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATSSW sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATBEHAND sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATZUGART sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATABGART sy-vline 
WA_RNPOL_MOVEMENT_FIELDS_STR-NWATZUGVA sy-vline      INTO ld_text SEPARATED BY SPACE.

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