ABAP Select data from SAP table E1S2KMPAH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1S2KMPAH 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 E1S2KMPAH. 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 E1S2KMPAH 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_E1S2KMPAH TYPE STANDARD TABLE OF E1S2KMPAH,
      WA_E1S2KMPAH TYPE E1S2KMPAH,
      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: <E1S2KMPAH> TYPE E1S2KMPAH.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1S2KMPAH.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1S2KMPAH
  INTO TABLE IT_E1S2KMPAH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1S2KMPAH
*  INTO TABLE @DATA(IT_E1S2KMPAH2).
*--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_E1S2KMPAH INDEX 1 INTO DATA(WA_E1S2KMPAH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1S2KMPAH ASSIGNING <E1S2KMPAH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1S2KMPAH>-COC = 1.
<E1S2KMPAH>-CUU = 1.
<E1S2KMPAH>-COU = 1.
<E1S2KMPAH>-RQN = 1.
<E1S2KMPAH>-RQC = 1.

ENDLOOP.

LOOP AT IT_E1S2KMPAH INTO WA_E1S2KMPAH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1S2KMPAH-PCN, sy-vline,
  WA_E1S2KMPAH-PVC, sy-vline,
  WA_E1S2KMPAH-QTT, sy-vline,
  WA_E1S2KMPAH-QED, sy-vline,
  WA_E1S2KMPAH-QVP, sy-vline,
  WA_E1S2KMPAH-PLC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1S2KMPAH 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_E1S2KMPAH 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_E1S2KMPAH INTO WA_E1S2KMPAH.


*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_E1S2KMPAH_STR, 
COC TYPE STRING,
CUU TYPE STRING,
COU TYPE STRING,
RQN TYPE STRING,
RQC TYPE STRING,
PCN TYPE STRING,
PVC TYPE STRING,
QTT TYPE STRING,
QED TYPE STRING,
QVP TYPE STRING,
PLC TYPE STRING,
SMB TYPE STRING,
ECC TYPE STRING,
CUR TYPE STRING,
EOC TYPE STRING,
PCO TYPE STRING,
TPC TYPE STRING,
SRU TYPE STRING,
PYT TYPE STRING,
TUU TYPE STRING,
CON TYPE STRING,
CUS TYPE STRING,
MESTYP TYPE STRING,
MESCOD TYPE STRING,
MESFCT TYPE STRING,
BELNR TYPE STRING,
POSEX TYPE STRING,
EKORG TYPE STRING,
SUPLC TYPE STRING,
PARTN TYPE STRING,
PERIOD TYPE STRING,
CURCY TYPE STRING,
BELPOS TYPE STRING,
ANGDT TYPE STRING,
BNDDT TYPE STRING,
SUS TYPE STRING,
TRU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1S2KMPAH_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_E1S2KMPAH_STR-COC sy-vline 
WA_E1S2KMPAH_STR-CUU sy-vline 
WA_E1S2KMPAH_STR-COU sy-vline 
WA_E1S2KMPAH_STR-RQN sy-vline 
WA_E1S2KMPAH_STR-RQC sy-vline 
WA_E1S2KMPAH_STR-PCN sy-vline 
WA_E1S2KMPAH_STR-PVC sy-vline 
WA_E1S2KMPAH_STR-QTT sy-vline 
WA_E1S2KMPAH_STR-QED sy-vline 
WA_E1S2KMPAH_STR-QVP sy-vline 
WA_E1S2KMPAH_STR-PLC sy-vline 
WA_E1S2KMPAH_STR-SMB sy-vline 
WA_E1S2KMPAH_STR-ECC sy-vline 
WA_E1S2KMPAH_STR-CUR sy-vline 
WA_E1S2KMPAH_STR-EOC sy-vline 
WA_E1S2KMPAH_STR-PCO sy-vline 
WA_E1S2KMPAH_STR-TPC sy-vline 
WA_E1S2KMPAH_STR-SRU sy-vline 
WA_E1S2KMPAH_STR-PYT sy-vline 
WA_E1S2KMPAH_STR-TUU sy-vline 
WA_E1S2KMPAH_STR-CON sy-vline 
WA_E1S2KMPAH_STR-CUS sy-vline 
WA_E1S2KMPAH_STR-MESTYP sy-vline 
WA_E1S2KMPAH_STR-MESCOD sy-vline 
WA_E1S2KMPAH_STR-MESFCT sy-vline 
WA_E1S2KMPAH_STR-BELNR sy-vline 
WA_E1S2KMPAH_STR-POSEX sy-vline 
WA_E1S2KMPAH_STR-EKORG sy-vline 
WA_E1S2KMPAH_STR-SUPLC sy-vline 
WA_E1S2KMPAH_STR-PARTN sy-vline 
WA_E1S2KMPAH_STR-PERIOD sy-vline 
WA_E1S2KMPAH_STR-CURCY sy-vline 
WA_E1S2KMPAH_STR-BELPOS sy-vline 
WA_E1S2KMPAH_STR-ANGDT sy-vline 
WA_E1S2KMPAH_STR-BNDDT sy-vline 
WA_E1S2KMPAH_STR-SUS sy-vline 
WA_E1S2KMPAH_STR-TRU sy-vline      INTO ld_text SEPARATED BY SPACE.

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