ABAP Select data from SAP table RLLNDATA_FLAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLLNDATA_FLAT
*  INTO TABLE @DATA(IT_RLLNDATA_FLAT2).
*--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_RLLNDATA_FLAT INDEX 1 INTO DATA(WA_RLLNDATA_FLAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLLNDATA_FLAT>-TYPE_NAMING_ID = 1.
<RLLNDATA_FLAT>-NAMING_ID = 1.
<RLLNDATA_FLAT>-POSTNO = 1.
<RLLNDATA_FLAT>-BJAHR = 1.
<RLLNDATA_FLAT>-ENTRTSTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLLNDATA_FLAT-USNAME, sy-vline,
  WA_RLLNDATA_FLAT-POSTDATE, sy-vline,
  WA_RLLNDATA_FLAT-EVTYPE, sy-vline,
  WA_RLLNDATA_FLAT-RET_MATNR, sy-vline,
  WA_RLLNDATA_FLAT-RET_MATNR_EXT, sy-vline,
  WA_RLLNDATA_FLAT-VKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLLNDATA_FLAT 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_RLLNDATA_FLAT 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_RLLNDATA_FLAT INTO WA_RLLNDATA_FLAT.


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

*Conversion exit GJAHR, internal->external for field BJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-BJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-BJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field RET_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-RET_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-RET_MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ENTRY_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-ENTRY_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-ENTRY_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASE_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-BASE_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-BASE_UOM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-MJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field REFPOSTYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-REFPOSTYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-REFPOSTYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field LSMEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-LSMEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-LSMEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACCTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLLNDATA_FLAT-ACCTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLLNDATA_FLAT-ACCTNO.
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_RLLNDATA_FLAT_STR, 
TYPE_NAMING_ID TYPE STRING,
NAMING_ID TYPE STRING,
POSTNO TYPE STRING,
BJAHR TYPE STRING,
ENTRTSTP TYPE STRING,
USNAME TYPE STRING,
POSTDATE TYPE STRING,
EVTYPE TYPE STRING,
RET_MATNR TYPE STRING,
RET_MATNR_EXT TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
POQUAN_ABS_ENTRY TYPE STRING,
ENTRY_UOM TYPE STRING,
POSTQUAN_ABS TYPE STRING,
BASE_UOM TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLIT TYPE STRING,
REFPOSTNO TYPE STRING,
REFPOSTYEAR TYPE STRING,
REFGRP_POSTIT TYPE STRING,
REFLFSNR TYPE STRING,
REFLFSPOS TYPE STRING,
REFLFSNR_I TYPE STRING,
REFLFSPOS_I TYPE STRING,
REFFRBNR TYPE STRING,
REFDOCNO TYPE STRING,
REFDOCDATE TYPE STRING,
BWART TYPE STRING,
LSMNG TYPE STRING,
LSMEH TYPE STRING,
ACCTPTY TYPE STRING,
SIGN TYPE STRING,
BUKRS TYPE STRING,
ACMANTY TYPE STRING,
ACMAN TYPE STRING,
ACMAN_EXT TYPE STRING,
ACHOLTY TYPE STRING,
ACHOL TYPE STRING,
ACHOL_EXT TYPE STRING,
ACCTNO TYPE STRING,
ACCTNO_EXT TYPE STRING,
MOVDATE TYPE STRING,
MOVTIME TYPE STRING,
TZONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLLNDATA_FLAT_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_RLLNDATA_FLAT_STR-TYPE_NAMING_ID sy-vline 
WA_RLLNDATA_FLAT_STR-NAMING_ID sy-vline 
WA_RLLNDATA_FLAT_STR-POSTNO sy-vline 
WA_RLLNDATA_FLAT_STR-BJAHR sy-vline 
WA_RLLNDATA_FLAT_STR-ENTRTSTP sy-vline 
WA_RLLNDATA_FLAT_STR-USNAME sy-vline 
WA_RLLNDATA_FLAT_STR-POSTDATE sy-vline 
WA_RLLNDATA_FLAT_STR-EVTYPE sy-vline 
WA_RLLNDATA_FLAT_STR-RET_MATNR sy-vline 
WA_RLLNDATA_FLAT_STR-RET_MATNR_EXT sy-vline 
WA_RLLNDATA_FLAT_STR-VKORG sy-vline 
WA_RLLNDATA_FLAT_STR-VTWEG sy-vline 
WA_RLLNDATA_FLAT_STR-POQUAN_ABS_ENTRY sy-vline 
WA_RLLNDATA_FLAT_STR-ENTRY_UOM sy-vline 
WA_RLLNDATA_FLAT_STR-POSTQUAN_ABS sy-vline 
WA_RLLNDATA_FLAT_STR-BASE_UOM sy-vline 
WA_RLLNDATA_FLAT_STR-MBLNR sy-vline 
WA_RLLNDATA_FLAT_STR-MJAHR sy-vline 
WA_RLLNDATA_FLAT_STR-MBLIT sy-vline 
WA_RLLNDATA_FLAT_STR-REFPOSTNO sy-vline 
WA_RLLNDATA_FLAT_STR-REFPOSTYEAR sy-vline 
WA_RLLNDATA_FLAT_STR-REFGRP_POSTIT sy-vline 
WA_RLLNDATA_FLAT_STR-REFLFSNR sy-vline 
WA_RLLNDATA_FLAT_STR-REFLFSPOS sy-vline 
WA_RLLNDATA_FLAT_STR-REFLFSNR_I sy-vline 
WA_RLLNDATA_FLAT_STR-REFLFSPOS_I sy-vline 
WA_RLLNDATA_FLAT_STR-REFFRBNR sy-vline 
WA_RLLNDATA_FLAT_STR-REFDOCNO sy-vline 
WA_RLLNDATA_FLAT_STR-REFDOCDATE sy-vline 
WA_RLLNDATA_FLAT_STR-BWART sy-vline 
WA_RLLNDATA_FLAT_STR-LSMNG sy-vline 
WA_RLLNDATA_FLAT_STR-LSMEH sy-vline 
WA_RLLNDATA_FLAT_STR-ACCTPTY sy-vline 
WA_RLLNDATA_FLAT_STR-SIGN sy-vline 
WA_RLLNDATA_FLAT_STR-BUKRS sy-vline 
WA_RLLNDATA_FLAT_STR-ACMANTY sy-vline 
WA_RLLNDATA_FLAT_STR-ACMAN sy-vline 
WA_RLLNDATA_FLAT_STR-ACMAN_EXT sy-vline 
WA_RLLNDATA_FLAT_STR-ACHOLTY sy-vline 
WA_RLLNDATA_FLAT_STR-ACHOL sy-vline 
WA_RLLNDATA_FLAT_STR-ACHOL_EXT sy-vline 
WA_RLLNDATA_FLAT_STR-ACCTNO sy-vline 
WA_RLLNDATA_FLAT_STR-ACCTNO_EXT sy-vline 
WA_RLLNDATA_FLAT_STR-MOVDATE sy-vline 
WA_RLLNDATA_FLAT_STR-MOVTIME sy-vline 
WA_RLLNDATA_FLAT_STR-TZONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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