ABAP Select data from SAP table /SAPAPO/CXGPRE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/CXGPRE
*  INTO TABLE @DATA(IT_/SAPAPO/CXGPRE2).
*--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_/SAPAPO/CXGPRE INDEX 1 INTO DATA(WA_/SAPAPO/CXGPRE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/CXGPRE>-AUFNR = 1.
</SAPAPO/CXGPRE>-BEDID = 1.
</SAPAPO/CXGPRE>-TYPKZ = 1.
</SAPAPO/CXGPRE>-SAFNR = 1.
</SAPAPO/CXGPRE>-PLNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/CXGPRE-KRIT1, sy-vline,
  WA_/SAPAPO/CXGPRE-RESTP, sy-vline,
  WA_/SAPAPO/CXGPRE-ARBID, sy-vline,
  WA_/SAPAPO/CXGPRE-MATNR, sy-vline,
  WA_/SAPAPO/CXGPRE-WERKS, sy-vline,
  WA_/SAPAPO/CXGPRE-PLNME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/CXGPRE 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_/SAPAPO/CXGPRE 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_/SAPAPO/CXGPRE INTO WA_/SAPAPO/CXGPRE.


*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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CXGPRE-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CXGPRE-AUFNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CXGPRE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CXGPRE-MEINS.
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_/SAPAPO/CXGPRE_STR, 
AUFNR TYPE STRING,
BEDID TYPE STRING,
TYPKZ TYPE STRING,
SAFNR TYPE STRING,
PLNUM TYPE STRING,
KRIT1 TYPE STRING,
RESTP TYPE STRING,
ARBID TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PLNME TYPE STRING,
KOKRS TYPE STRING,
KSTAR TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
PRKST TYPE STRING,
WAERS TYPE STRING,
STVRG TYPE STRING,
SZVRG TYPE STRING,
ENVRG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/CXGPRE_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_/SAPAPO/CXGPRE_STR-AUFNR sy-vline 
WA_/SAPAPO/CXGPRE_STR-BEDID sy-vline 
WA_/SAPAPO/CXGPRE_STR-TYPKZ sy-vline 
WA_/SAPAPO/CXGPRE_STR-SAFNR sy-vline 
WA_/SAPAPO/CXGPRE_STR-PLNUM sy-vline 
WA_/SAPAPO/CXGPRE_STR-KRIT1 sy-vline 
WA_/SAPAPO/CXGPRE_STR-RESTP sy-vline 
WA_/SAPAPO/CXGPRE_STR-ARBID sy-vline 
WA_/SAPAPO/CXGPRE_STR-MATNR sy-vline 
WA_/SAPAPO/CXGPRE_STR-WERKS sy-vline 
WA_/SAPAPO/CXGPRE_STR-PLNME sy-vline 
WA_/SAPAPO/CXGPRE_STR-KOKRS sy-vline 
WA_/SAPAPO/CXGPRE_STR-KSTAR sy-vline 
WA_/SAPAPO/CXGPRE_STR-BDMNG sy-vline 
WA_/SAPAPO/CXGPRE_STR-MEINS sy-vline 
WA_/SAPAPO/CXGPRE_STR-PRKST sy-vline 
WA_/SAPAPO/CXGPRE_STR-WAERS sy-vline 
WA_/SAPAPO/CXGPRE_STR-STVRG sy-vline 
WA_/SAPAPO/CXGPRE_STR-SZVRG sy-vline 
WA_/SAPAPO/CXGPRE_STR-ENVRG sy-vline      INTO ld_text SEPARATED BY SPACE.

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