ABAP Select data from SAP table PEICP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PEICP
*  INTO TABLE @DATA(IT_PEICP2).
*--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_PEICP INDEX 1 INTO DATA(WA_PEICP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PEICP>-CATEG = 1.
<PEICP>-SUBC1 = 1.
<PEICP>-SUBC2 = 1.
<PEICP>-SUBC3 = 1.
<PEICP>-SUBC4 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PEICP-OWNOR, sy-vline,
  WA_PEICP-OWNAG, sy-vline,
  WA_PEICP-PROCA, sy-vline,
  WA_PEICP-PROCO, sy-vline,
  WA_PEICP-PRIOT, sy-vline,
  WA_PEICP-PERNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PEICP 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_PEICP 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_PEICP INTO WA_PEICP.


*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 ACTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEICP-ACTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEICP-ACTNO.
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_PEICP_STR, 
CATEG TYPE STRING,
SUBC1 TYPE STRING,
SUBC2 TYPE STRING,
SUBC3 TYPE STRING,
SUBC4 TYPE STRING,
OWNOR TYPE STRING,
OWNAG TYPE STRING,
PROCA TYPE STRING,
PROCO TYPE STRING,
PRIOT TYPE STRING,
PERNR TYPE STRING,
ACTNO TYPE STRING,
PROFI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PEICP_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_PEICP_STR-CATEG sy-vline 
WA_PEICP_STR-SUBC1 sy-vline 
WA_PEICP_STR-SUBC2 sy-vline 
WA_PEICP_STR-SUBC3 sy-vline 
WA_PEICP_STR-SUBC4 sy-vline 
WA_PEICP_STR-OWNOR sy-vline 
WA_PEICP_STR-OWNAG sy-vline 
WA_PEICP_STR-PROCA sy-vline 
WA_PEICP_STR-PROCO sy-vline 
WA_PEICP_STR-PRIOT sy-vline 
WA_PEICP_STR-PERNR sy-vline 
WA_PEICP_STR-ACTNO sy-vline 
WA_PEICP_STR-PROFI sy-vline      INTO ld_text SEPARATED BY SPACE.

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