ABAP Select data from SAP table PCASUB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCASUB
*  INTO TABLE @DATA(IT_PCASUB2).
*--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_PCASUB INDEX 1 INTO DATA(WA_PCASUB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCASUB>-PRCTR = 1.
<PCASUB>-MVGR1 = 1.
<PCASUB>-MVGR2 = 1.
<PCASUB>-MVGR3 = 1.
<PCASUB>-MVGR4 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCASUB-MVGR5, sy-vline,
  WA_PCASUB-KONDM, sy-vline,
  WA_PCASUB-KDGRP, sy-vline,
  WA_PCASUB-BZIRK, sy-vline,
  WA_PCASUB-KVGR1, sy-vline,
  WA_PCASUB-KVGR2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCASUB 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_PCASUB 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_PCASUB INTO WA_PCASUB.


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

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

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

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

*Conversion exit ALPHA, internal->external for field INT_KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PCASUB-INT_KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCASUB-INT_KUNNR.
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_PCASUB_STR, 
PRCTR TYPE STRING,
MVGR1 TYPE STRING,
MVGR2 TYPE STRING,
MVGR3 TYPE STRING,
MVGR4 TYPE STRING,
MVGR5 TYPE STRING,
KONDM TYPE STRING,
KDGRP TYPE STRING,
BZIRK TYPE STRING,
KVGR1 TYPE STRING,
KVGR2 TYPE STRING,
KVGR3 TYPE STRING,
KVGR4 TYPE STRING,
KVGR5 TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPAR2 TYPE STRING,
SPART TYPE STRING,
MATNR TYPE STRING,
MATWA TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
GSBER TYPE STRING,
MATKL TYPE STRING,
PRODH TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
AUGRU TYPE STRING,
KUNNR TYPE STRING,
LAND1 TYPE STRING,
KTGRM TYPE STRING,
VRGNG TYPE STRING,
KTGRD TYPE STRING,
INT_KUNNR TYPE STRING,
INT_VKORG TYPE STRING,
INT_VTWEG TYPE STRING,
INT_SPART TYPE STRING,
PRCTR_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCASUB_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_PCASUB_STR-PRCTR sy-vline 
WA_PCASUB_STR-MVGR1 sy-vline 
WA_PCASUB_STR-MVGR2 sy-vline 
WA_PCASUB_STR-MVGR3 sy-vline 
WA_PCASUB_STR-MVGR4 sy-vline 
WA_PCASUB_STR-MVGR5 sy-vline 
WA_PCASUB_STR-KONDM sy-vline 
WA_PCASUB_STR-KDGRP sy-vline 
WA_PCASUB_STR-BZIRK sy-vline 
WA_PCASUB_STR-KVGR1 sy-vline 
WA_PCASUB_STR-KVGR2 sy-vline 
WA_PCASUB_STR-KVGR3 sy-vline 
WA_PCASUB_STR-KVGR4 sy-vline 
WA_PCASUB_STR-KVGR5 sy-vline 
WA_PCASUB_STR-VKORG sy-vline 
WA_PCASUB_STR-VTWEG sy-vline 
WA_PCASUB_STR-SPAR2 sy-vline 
WA_PCASUB_STR-SPART sy-vline 
WA_PCASUB_STR-MATNR sy-vline 
WA_PCASUB_STR-MATWA sy-vline 
WA_PCASUB_STR-WERKS sy-vline 
WA_PCASUB_STR-LGORT sy-vline 
WA_PCASUB_STR-GSBER sy-vline 
WA_PCASUB_STR-MATKL sy-vline 
WA_PCASUB_STR-PRODH sy-vline 
WA_PCASUB_STR-VKBUR sy-vline 
WA_PCASUB_STR-VKGRP sy-vline 
WA_PCASUB_STR-AUGRU sy-vline 
WA_PCASUB_STR-KUNNR sy-vline 
WA_PCASUB_STR-LAND1 sy-vline 
WA_PCASUB_STR-KTGRM sy-vline 
WA_PCASUB_STR-VRGNG sy-vline 
WA_PCASUB_STR-KTGRD sy-vline 
WA_PCASUB_STR-INT_KUNNR sy-vline 
WA_PCASUB_STR-INT_VKORG sy-vline 
WA_PCASUB_STR-INT_VTWEG sy-vline 
WA_PCASUB_STR-INT_SPART sy-vline 
WA_PCASUB_STR-PRCTR_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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