ABAP Select data from SAP table RCJ_PS_MAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCJ_PS_MAT
*  INTO TABLE @DATA(IT_RCJ_PS_MAT2).
*--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_RCJ_PS_MAT INDEX 1 INTO DATA(WA_RCJ_PS_MAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCJ_PS_MAT>-OBJEKTID = 1.
<RCJ_PS_MAT>-KURZTEXT = 1.
<RCJ_PS_MAT>-ELIKZ = 1.
<RCJ_PS_MAT>-KZEAR = 1.
<RCJ_PS_MAT>-RSNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCJ_PS_MAT-RSPOS, sy-vline,
  WA_RCJ_PS_MAT-BANFNR, sy-vline,
  WA_RCJ_PS_MAT-BNFPO, sy-vline,
  WA_RCJ_PS_MAT-LFDAT_BNF, sy-vline,
  WA_RCJ_PS_MAT-BDMNG, sy-vline,
  WA_RCJ_PS_MAT-ENMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCJ_PS_MAT 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_RCJ_PS_MAT 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_RCJ_PS_MAT INTO WA_RCJ_PS_MAT.


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

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

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

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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RCJ_PS_MAT-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCJ_PS_MAT-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCJ_PS_MAT-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCJ_PS_MAT-LIFNR.
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_RCJ_PS_MAT_STR, 
OBJEKTID TYPE STRING,
KURZTEXT TYPE STRING,
ELIKZ TYPE STRING,
KZEAR TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
BANFNR TYPE STRING,
BNFPO TYPE STRING,
LFDAT_BNF TYPE STRING,
BDMNG TYPE STRING,
ENMNG TYPE STRING,
WEMNG TYPE STRING,
MEINS TYPE STRING,
BDTER TYPE STRING,
XFEHL TYPE STRING,
ENDAT_MAX TYPE STRING,
WEDAT_MAX TYPE STRING,
POSTP TYPE STRING,
SOBKZ TYPE STRING,
SHKZG TYPE STRING,
EBELN TYPE STRING,
KNTTP TYPE STRING,
AUFNR TYPE STRING,
VORNR TYPE STRING,
GPREIS TYPE STRING,
FPREIS TYPE STRING,
EKGRP TYPE STRING,
VMENG TYPE STRING,
LIFZT TYPE STRING,
NO_DISP TYPE STRING,
WEMPF TYPE STRING,
VORAB TYPE STRING,
MATKL TYPE STRING,
LIFNR TYPE STRING,
PEINH TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCJ_PS_MAT_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_RCJ_PS_MAT_STR-OBJEKTID sy-vline 
WA_RCJ_PS_MAT_STR-KURZTEXT sy-vline 
WA_RCJ_PS_MAT_STR-ELIKZ sy-vline 
WA_RCJ_PS_MAT_STR-KZEAR sy-vline 
WA_RCJ_PS_MAT_STR-RSNUM sy-vline 
WA_RCJ_PS_MAT_STR-RSPOS sy-vline 
WA_RCJ_PS_MAT_STR-BANFNR sy-vline 
WA_RCJ_PS_MAT_STR-BNFPO sy-vline 
WA_RCJ_PS_MAT_STR-LFDAT_BNF sy-vline 
WA_RCJ_PS_MAT_STR-BDMNG sy-vline 
WA_RCJ_PS_MAT_STR-ENMNG sy-vline 
WA_RCJ_PS_MAT_STR-WEMNG sy-vline 
WA_RCJ_PS_MAT_STR-MEINS sy-vline 
WA_RCJ_PS_MAT_STR-BDTER sy-vline 
WA_RCJ_PS_MAT_STR-XFEHL sy-vline 
WA_RCJ_PS_MAT_STR-ENDAT_MAX sy-vline 
WA_RCJ_PS_MAT_STR-WEDAT_MAX sy-vline 
WA_RCJ_PS_MAT_STR-POSTP sy-vline 
WA_RCJ_PS_MAT_STR-SOBKZ sy-vline 
WA_RCJ_PS_MAT_STR-SHKZG sy-vline 
WA_RCJ_PS_MAT_STR-EBELN sy-vline 
WA_RCJ_PS_MAT_STR-KNTTP sy-vline 
WA_RCJ_PS_MAT_STR-AUFNR sy-vline 
WA_RCJ_PS_MAT_STR-VORNR sy-vline 
WA_RCJ_PS_MAT_STR-GPREIS sy-vline 
WA_RCJ_PS_MAT_STR-FPREIS sy-vline 
WA_RCJ_PS_MAT_STR-EKGRP sy-vline 
WA_RCJ_PS_MAT_STR-VMENG sy-vline 
WA_RCJ_PS_MAT_STR-LIFZT sy-vline 
WA_RCJ_PS_MAT_STR-NO_DISP sy-vline 
WA_RCJ_PS_MAT_STR-WEMPF sy-vline 
WA_RCJ_PS_MAT_STR-VORAB sy-vline 
WA_RCJ_PS_MAT_STR-MATKL sy-vline 
WA_RCJ_PS_MAT_STR-LIFNR sy-vline 
WA_RCJ_PS_MAT_STR-PEINH sy-vline 
WA_RCJ_PS_MAT_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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