ABAP Select data from SAP table PUNCMT_A_DS1P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PUNCMT_A_DS1P 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 PUNCMT_A_DS1P. 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 PUNCMT_A_DS1P 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_PUNCMT_A_DS1P TYPE STANDARD TABLE OF PUNCMT_A_DS1P,
      WA_PUNCMT_A_DS1P TYPE PUNCMT_A_DS1P,
      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: <PUNCMT_A_DS1P> TYPE PUNCMT_A_DS1P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PUNCMT_A_DS1P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PUNCMT_A_DS1P
  INTO TABLE IT_PUNCMT_A_DS1P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PUNCMT_A_DS1P
*  INTO TABLE @DATA(IT_PUNCMT_A_DS1P2).
*--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_PUNCMT_A_DS1P INDEX 1 INTO DATA(WA_PUNCMT_A_DS1P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PUNCMT_A_DS1P ASSIGNING <PUNCMT_A_DS1P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PUNCMT_A_DS1P>-EFF_DATE = 1.
<PUNCMT_A_DS1P>-DSCAT = 1.
<PUNCMT_A_DS1P>-DSRGN = 1.
<PUNCMT_A_DS1P>-DSHML = 1.
<PUNCMT_A_DS1P>-RSSCH = 1.

ENDLOOP.

LOOP AT IT_PUNCMT_A_DS1P INTO WA_PUNCMT_A_DS1P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PUNCMT_A_DS1P-RSWAI, sy-vline,
  WA_PUNCMT_A_DS1P-RSPCA, sy-vline,
  WA_PUNCMT_A_DS1P-EGDDS, sy-vline,
  WA_PUNCMT_A_DS1P-EGASH, sy-vline,
  WA_PUNCMT_A_DS1P-RSGRP, sy-vline,
  WA_PUNCMT_A_DS1P-DSSCL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PUNCMT_A_DS1P 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_PUNCMT_A_DS1P 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_PUNCMT_A_DS1P INTO WA_PUNCMT_A_DS1P.


*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_PUNCMT_A_DS1P_STR, 
EFF_DATE TYPE STRING,
DSCAT TYPE STRING,
DSRGN TYPE STRING,
DSHML TYPE STRING,
RSSCH TYPE STRING,
RSWAI TYPE STRING,
RSPCA TYPE STRING,
EGDDS TYPE STRING,
EGASH TYPE STRING,
RSGRP TYPE STRING,
DSSCL TYPE STRING,
DSAPA TYPE STRING,
DSAFI TYPE STRING,
DSESI TYPE STRING,
HAZRC TYPE STRING,
DSROC TYPE STRING,
DSARR TYPE STRING,
DSAPR TYPE STRING,
DSALD TYPE STRING,
DSRGC TYPE STRING,
DNGPY TYPE STRING,
F_ADLH_TRAN_SER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PUNCMT_A_DS1P_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_PUNCMT_A_DS1P_STR-EFF_DATE sy-vline 
WA_PUNCMT_A_DS1P_STR-DSCAT sy-vline 
WA_PUNCMT_A_DS1P_STR-DSRGN sy-vline 
WA_PUNCMT_A_DS1P_STR-DSHML sy-vline 
WA_PUNCMT_A_DS1P_STR-RSSCH sy-vline 
WA_PUNCMT_A_DS1P_STR-RSWAI sy-vline 
WA_PUNCMT_A_DS1P_STR-RSPCA sy-vline 
WA_PUNCMT_A_DS1P_STR-EGDDS sy-vline 
WA_PUNCMT_A_DS1P_STR-EGASH sy-vline 
WA_PUNCMT_A_DS1P_STR-RSGRP sy-vline 
WA_PUNCMT_A_DS1P_STR-DSSCL sy-vline 
WA_PUNCMT_A_DS1P_STR-DSAPA sy-vline 
WA_PUNCMT_A_DS1P_STR-DSAFI sy-vline 
WA_PUNCMT_A_DS1P_STR-DSESI sy-vline 
WA_PUNCMT_A_DS1P_STR-HAZRC sy-vline 
WA_PUNCMT_A_DS1P_STR-DSROC sy-vline 
WA_PUNCMT_A_DS1P_STR-DSARR sy-vline 
WA_PUNCMT_A_DS1P_STR-DSAPR sy-vline 
WA_PUNCMT_A_DS1P_STR-DSALD sy-vline 
WA_PUNCMT_A_DS1P_STR-DSRGC sy-vline 
WA_PUNCMT_A_DS1P_STR-DNGPY sy-vline 
WA_PUNCMT_A_DS1P_STR-F_ADLH_TRAN_SER sy-vline      INTO ld_text SEPARATED BY SPACE.

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