ABAP Select data from SAP table P20ABS_RMB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P20ABS_RMB 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 P20ABS_RMB. 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 P20ABS_RMB 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_P20ABS_RMB TYPE STANDARD TABLE OF P20ABS_RMB,
      WA_P20ABS_RMB TYPE P20ABS_RMB,
      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: <P20ABS_RMB> TYPE P20ABS_RMB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P20ABS_RMB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P20ABS_RMB
  INTO TABLE IT_P20ABS_RMB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P20ABS_RMB
*  INTO TABLE @DATA(IT_P20ABS_RMB2).
*--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_P20ABS_RMB INDEX 1 INTO DATA(WA_P20ABS_RMB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P20ABS_RMB ASSIGNING <P20ABS_RMB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P20ABS_RMB>-ABZNR = 1.
<P20ABS_RMB>-ABSGR = 1.
<P20ABS_RMB>-STABS = 1.
<P20ABS_RMB>-BEGDA = 1.
<P20ABS_RMB>-ENDDA = 1.

ENDLOOP.

LOOP AT IT_P20ABS_RMB INTO WA_P20ABS_RMB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P20ABS_RMB-OBEGD, sy-vline,
  WA_P20ABS_RMB-OENDD, sy-vline,
  WA_P20ABS_RMB-AVSEG, sy-vline,
  WA_P20ABS_RMB-PSARB, sy-vline,
  WA_P20ABS_RMB-OFIX, sy-vline,
  WA_P20ABS_RMB-MFIX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P20ABS_RMB 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_P20ABS_RMB 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_P20ABS_RMB INTO WA_P20ABS_RMB.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_P20ABS_RMB_STR, 
ABZNR TYPE STRING,
ABSGR TYPE STRING,
STABS TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
OBEGD TYPE STRING,
OENDD TYPE STRING,
AVSEG TYPE STRING,
PSARB TYPE STRING,
OFIX TYPE STRING,
MFIX TYPE STRING,
APFIX TYPE STRING,
TPFIX TYPE STRING,
FTP6G TYPE STRING,
OVAR TYPE STRING,
MVAR TYPE STRING,
APVAR TYPE STRING,
TPVAR TYPE STRING,
VTP6G TYPE STRING,
RTE6G TYPE STRING,
VARD TYPE STRING,
MXDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P20ABS_RMB_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_P20ABS_RMB_STR-ABZNR sy-vline 
WA_P20ABS_RMB_STR-ABSGR sy-vline 
WA_P20ABS_RMB_STR-STABS sy-vline 
WA_P20ABS_RMB_STR-BEGDA sy-vline 
WA_P20ABS_RMB_STR-ENDDA sy-vline 
WA_P20ABS_RMB_STR-OBEGD sy-vline 
WA_P20ABS_RMB_STR-OENDD sy-vline 
WA_P20ABS_RMB_STR-AVSEG sy-vline 
WA_P20ABS_RMB_STR-PSARB sy-vline 
WA_P20ABS_RMB_STR-OFIX sy-vline 
WA_P20ABS_RMB_STR-MFIX sy-vline 
WA_P20ABS_RMB_STR-APFIX sy-vline 
WA_P20ABS_RMB_STR-TPFIX sy-vline 
WA_P20ABS_RMB_STR-FTP6G sy-vline 
WA_P20ABS_RMB_STR-OVAR sy-vline 
WA_P20ABS_RMB_STR-MVAR sy-vline 
WA_P20ABS_RMB_STR-APVAR sy-vline 
WA_P20ABS_RMB_STR-TPVAR sy-vline 
WA_P20ABS_RMB_STR-VTP6G sy-vline 
WA_P20ABS_RMB_STR-RTE6G sy-vline 
WA_P20ABS_RMB_STR-VARD sy-vline 
WA_P20ABS_RMB_STR-MXDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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