ABAP Select data from SAP table P2RC_CHVS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RC_CHVS 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 P2RC_CHVS. 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 P2RC_CHVS 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_P2RC_CHVS TYPE STANDARD TABLE OF P2RC_CHVS,
      WA_P2RC_CHVS TYPE P2RC_CHVS,
      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: <P2RC_CHVS> TYPE P2RC_CHVS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RC_CHVS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RC_CHVS
  INTO TABLE IT_P2RC_CHVS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RC_CHVS
*  INTO TABLE @DATA(IT_P2RC_CHVS2).
*--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_P2RC_CHVS INDEX 1 INTO DATA(WA_P2RC_CHVS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RC_CHVS ASSIGNING <P2RC_CHVS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RC_CHVS>-MANDT = 1.
<P2RC_CHVS>-DCT_PERNR = 1.
<P2RC_CHVS>-DCT_SEQNR = 1.
<P2RC_CHVS>-DCT_ROWID = 1.
<P2RC_CHVS>-CNTR3 = 1.

ENDLOOP.

LOOP AT IT_P2RC_CHVS INTO WA_P2RC_CHVS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RC_CHVS-LGART, sy-vline,
  WA_P2RC_CHVS-BEGDA, sy-vline,
  WA_P2RC_CHVS-ENDDA, sy-vline,
  WA_P2RC_CHVS-ANWSCHLCH, sy-vline,
  WA_P2RC_CHVS-ANWSCHL, sy-vline,
  WA_P2RC_CHVS-MODIF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RC_CHVS 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_P2RC_CHVS 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_P2RC_CHVS INTO WA_P2RC_CHVS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P2RC_CHVS_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
CNTR3 TYPE STRING,
LGART TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ANWSCHLCH TYPE STRING,
ANWSCHL TYPE STRING,
MODIF TYPE STRING,
BEREICH TYPE STRING,
LIMITE TYPE STRING,
PR_AG TYPE STRING,
PR_AN TYPE STRING,
DIFF TYPE STRING,
EINHEIT TYPE STRING,
BETAN TYPE STRING,
BETAG TYPE STRING,
BASIS TYPE STRING,
DIFF_BASIS TYPE STRING,
WAERS TYPE STRING,
PR_AG1 TYPE STRING,
PR_AN1 TYPE STRING,
KZFIX TYPE STRING,
BASIS_KUM TYPE STRING,
DIFFBASIS_KUM TYPE STRING,
ANWSCHLCH2 TYPE STRING,
ANWSCHL2 TYPE STRING,
BTRT1 TYPE STRING,
UVGBTRTL TYPE STRING,
ACATG TYPE STRING,
SW_NPFL TYPE STRING,
CNTR2 TYPE STRING,
PR_BU_AG TYPE STRING,
PR_NBU_AG TYPE STRING,
PR_NBU_AN TYPE STRING,
PR_NBUZ_AG TYPE STRING,
PR_NBUZ_AN TYPE STRING,
PFL_PER TYPE STRING,
PFL_JAHR TYPE STRING,
GES_JAHR TYPE STRING,
HLOHN_JAHR TYPE STRING,
HLOHN_LUFT TYPE STRING,
HLOHN_SVTG TYPE STRING,
BAS_JAHR TYPE STRING,
LGART2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RC_CHVS_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_P2RC_CHVS_STR-MANDT sy-vline 
WA_P2RC_CHVS_STR-DCT_PERNR sy-vline 
WA_P2RC_CHVS_STR-DCT_SEQNR sy-vline 
WA_P2RC_CHVS_STR-DCT_ROWID sy-vline 
WA_P2RC_CHVS_STR-CNTR3 sy-vline 
WA_P2RC_CHVS_STR-LGART sy-vline 
WA_P2RC_CHVS_STR-BEGDA sy-vline 
WA_P2RC_CHVS_STR-ENDDA sy-vline 
WA_P2RC_CHVS_STR-ANWSCHLCH sy-vline 
WA_P2RC_CHVS_STR-ANWSCHL sy-vline 
WA_P2RC_CHVS_STR-MODIF sy-vline 
WA_P2RC_CHVS_STR-BEREICH sy-vline 
WA_P2RC_CHVS_STR-LIMITE sy-vline 
WA_P2RC_CHVS_STR-PR_AG sy-vline 
WA_P2RC_CHVS_STR-PR_AN sy-vline 
WA_P2RC_CHVS_STR-DIFF sy-vline 
WA_P2RC_CHVS_STR-EINHEIT sy-vline 
WA_P2RC_CHVS_STR-BETAN sy-vline 
WA_P2RC_CHVS_STR-BETAG sy-vline 
WA_P2RC_CHVS_STR-BASIS sy-vline 
WA_P2RC_CHVS_STR-DIFF_BASIS sy-vline 
WA_P2RC_CHVS_STR-WAERS sy-vline 
WA_P2RC_CHVS_STR-PR_AG1 sy-vline 
WA_P2RC_CHVS_STR-PR_AN1 sy-vline 
WA_P2RC_CHVS_STR-KZFIX sy-vline 
WA_P2RC_CHVS_STR-BASIS_KUM sy-vline 
WA_P2RC_CHVS_STR-DIFFBASIS_KUM sy-vline 
WA_P2RC_CHVS_STR-ANWSCHLCH2 sy-vline 
WA_P2RC_CHVS_STR-ANWSCHL2 sy-vline 
WA_P2RC_CHVS_STR-BTRT1 sy-vline 
WA_P2RC_CHVS_STR-UVGBTRTL sy-vline 
WA_P2RC_CHVS_STR-ACATG sy-vline 
WA_P2RC_CHVS_STR-SW_NPFL sy-vline 
WA_P2RC_CHVS_STR-CNTR2 sy-vline 
WA_P2RC_CHVS_STR-PR_BU_AG sy-vline 
WA_P2RC_CHVS_STR-PR_NBU_AG sy-vline 
WA_P2RC_CHVS_STR-PR_NBU_AN sy-vline 
WA_P2RC_CHVS_STR-PR_NBUZ_AG sy-vline 
WA_P2RC_CHVS_STR-PR_NBUZ_AN sy-vline 
WA_P2RC_CHVS_STR-PFL_PER sy-vline 
WA_P2RC_CHVS_STR-PFL_JAHR sy-vline 
WA_P2RC_CHVS_STR-GES_JAHR sy-vline 
WA_P2RC_CHVS_STR-HLOHN_JAHR sy-vline 
WA_P2RC_CHVS_STR-HLOHN_LUFT sy-vline 
WA_P2RC_CHVS_STR-HLOHN_SVTG sy-vline 
WA_P2RC_CHVS_STR-BAS_JAHR sy-vline 
WA_P2RC_CHVS_STR-LGART2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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