ABAP Select data from SAP table PSGENERB into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PSGENERB 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 PSGENERB. 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 PSGENERB 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_PSGENERB TYPE STANDARD TABLE OF PSGENERB,
      WA_PSGENERB TYPE PSGENERB,
      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: <PSGENERB> TYPE PSGENERB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSGENERB
*  INTO TABLE @DATA(IT_PSGENERB2).
*--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_PSGENERB INDEX 1 INTO DATA(WA_PSGENERB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSGENERB>-EISKTEXT = 1.
<PSGENERB>-POSID = 1.
<PSGENERB>-PSPID = 1.
<PSGENERB>-POSKI = 1.
<PSGENERB>-VERNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSGENERB-VERNA, sy-vline,
  WA_PSGENERB-ASTNR, sy-vline,
  WA_PSGENERB-ASTNA, sy-vline,
  WA_PSGENERB-COMCOD, sy-vline,
  WA_PSGENERB-BUSARE, sy-vline,
  WA_PSGENERB-PRFCTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSGENERB 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_PSGENERB 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_PSGENERB INTO WA_PSGENERB.


*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 ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_PSGENERB-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENERB-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_PSGENERB-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENERB-PSPID.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit SCOPE, internal->external for field SCOPE
CALL FUNCTION 'CONVERSION_EXIT_SCOPE_OUTPUT'
  EXPORTING
    input =                      WA_PSGENERB-SCOPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENERB-SCOPE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ISIZE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PSGENERB-ISIZE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSGENERB-ISIZE.
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_PSGENERB_STR, 
EISKTEXT TYPE STRING,
POSID TYPE STRING,
PSPID TYPE STRING,
POSKI TYPE STRING,
VERNR TYPE STRING,
VERNA TYPE STRING,
ASTNR TYPE STRING,
ASTNA TYPE STRING,
COMCOD TYPE STRING,
BUSARE TYPE STRING,
PRFCTR TYPE STRING,
PRTYP TYPE STRING,
AKOKR TYPE STRING,
AKSTL TYPE STRING,
FKOKR TYPE STRING,
FKSTL TYPE STRING,
SCOPE TYPE STRING,
WERKS TYPE STRING,
USR00X TYPE STRING,
USR01X TYPE STRING,
USR02X TYPE STRING,
USR03X TYPE STRING,
USR08X TYPE STRING,
USR09X TYPE STRING,
USR10X TYPE STRING,
USR11X TYPE STRING,
COSCTR TYPE STRING,
IZWEK TYPE STRING,
ISIZE TYPE STRING,
IUMKZ TYPE STRING,
STORT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSGENERB_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_PSGENERB_STR-EISKTEXT sy-vline 
WA_PSGENERB_STR-POSID sy-vline 
WA_PSGENERB_STR-PSPID sy-vline 
WA_PSGENERB_STR-POSKI sy-vline 
WA_PSGENERB_STR-VERNR sy-vline 
WA_PSGENERB_STR-VERNA sy-vline 
WA_PSGENERB_STR-ASTNR sy-vline 
WA_PSGENERB_STR-ASTNA sy-vline 
WA_PSGENERB_STR-COMCOD sy-vline 
WA_PSGENERB_STR-BUSARE sy-vline 
WA_PSGENERB_STR-PRFCTR sy-vline 
WA_PSGENERB_STR-PRTYP sy-vline 
WA_PSGENERB_STR-AKOKR sy-vline 
WA_PSGENERB_STR-AKSTL sy-vline 
WA_PSGENERB_STR-FKOKR sy-vline 
WA_PSGENERB_STR-FKSTL sy-vline 
WA_PSGENERB_STR-SCOPE sy-vline 
WA_PSGENERB_STR-WERKS sy-vline 
WA_PSGENERB_STR-USR00X sy-vline 
WA_PSGENERB_STR-USR01X sy-vline 
WA_PSGENERB_STR-USR02X sy-vline 
WA_PSGENERB_STR-USR03X sy-vline 
WA_PSGENERB_STR-USR08X sy-vline 
WA_PSGENERB_STR-USR09X sy-vline 
WA_PSGENERB_STR-USR10X sy-vline 
WA_PSGENERB_STR-USR11X sy-vline 
WA_PSGENERB_STR-COSCTR sy-vline 
WA_PSGENERB_STR-IZWEK sy-vline 
WA_PSGENERB_STR-ISIZE sy-vline 
WA_PSGENERB_STR-IUMKZ sy-vline 
WA_PSGENERB_STR-STORT sy-vline      INTO ld_text SEPARATED BY SPACE.

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