ABAP Select data from SAP table /SCWM/BAPIMEPOHEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/BAPIMEPOHEADER 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 /SCWM/BAPIMEPOHEADER. 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 /SCWM/BAPIMEPOHEADER 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_/SCWM/BAPIMEPOHEADER TYPE STANDARD TABLE OF /SCWM/BAPIMEPOHEADER,
      WA_/SCWM/BAPIMEPOHEADER TYPE /SCWM/BAPIMEPOHEADER,
      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: </SCWM/BAPIMEPOHEADER> TYPE /SCWM/BAPIMEPOHEADER.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/BAPIMEPOHEADER
  INTO TABLE IT_/SCWM/BAPIMEPOHEADER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/BAPIMEPOHEADER
*  INTO TABLE @DATA(IT_/SCWM/BAPIMEPOHEADER2).
*--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_/SCWM/BAPIMEPOHEADER INDEX 1 INTO DATA(WA_/SCWM/BAPIMEPOHEADER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/BAPIMEPOHEADER ASSIGNING </SCWM/BAPIMEPOHEADER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/BAPIMEPOHEADER>-PO_NUMBER = 1.
</SCWM/BAPIMEPOHEADER>-COMP_CODE = 1.
</SCWM/BAPIMEPOHEADER>-DOC_TYPE = 1.
</SCWM/BAPIMEPOHEADER>-DELETE_IND = 1.
</SCWM/BAPIMEPOHEADER>-STATUS = 1.

ENDLOOP.

LOOP AT IT_/SCWM/BAPIMEPOHEADER INTO WA_/SCWM/BAPIMEPOHEADER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/BAPIMEPOHEADER-CREAT_DATE, sy-vline,
  WA_/SCWM/BAPIMEPOHEADER-CREATED_BY, sy-vline,
  WA_/SCWM/BAPIMEPOHEADER-ITEM_INTVL, sy-vline,
  WA_/SCWM/BAPIMEPOHEADER-VENDOR, sy-vline,
  WA_/SCWM/BAPIMEPOHEADER-LANGU, sy-vline,
  WA_/SCWM/BAPIMEPOHEADER-LANGU_ISO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/BAPIMEPOHEADER 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_/SCWM/BAPIMEPOHEADER 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_/SCWM/BAPIMEPOHEADER INTO WA_/SCWM/BAPIMEPOHEADER.


*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 PO_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/BAPIMEPOHEADER-PO_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/BAPIMEPOHEADER-PO_NUMBER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/BAPIMEPOHEADER-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/BAPIMEPOHEADER-LANGU.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/BAPIMEPOHEADER-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/BAPIMEPOHEADER-LOGSYSTEM.
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_/SCWM/BAPIMEPOHEADER_STR, 
PO_NUMBER TYPE STRING,
COMP_CODE TYPE STRING,
DOC_TYPE TYPE STRING,
DELETE_IND TYPE STRING,
STATUS TYPE STRING,
CREAT_DATE TYPE STRING,
CREATED_BY TYPE STRING,
ITEM_INTVL TYPE STRING,
VENDOR TYPE STRING,
LANGU TYPE STRING,
LANGU_ISO TYPE STRING,
PMNTTRMS TYPE STRING,
DSCNT1_TO TYPE STRING,
DSCNT2_TO TYPE STRING,
DSCNT3_TO TYPE STRING,
DSCT_PCT1 TYPE STRING,
DSCT_PCT2 TYPE STRING,
PURCH_ORG TYPE STRING,
PUR_GROUP TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
EXCH_RATE TYPE STRING,
EX_RATE_FX TYPE STRING,
DOC_DATE TYPE STRING,
VPER_START TYPE STRING,
VPER_END TYPE STRING,
WARRANTY TYPE STRING,
QUOTATION TYPE STRING,
QUOT_DATE TYPE STRING,
REF_1 TYPE STRING,
SALES_PERS TYPE STRING,
TELEPHONE TYPE STRING,
SUPPL_VEND TYPE STRING,
CUSTOMER TYPE STRING,
AGREEMENT TYPE STRING,
GR_MESSAGE TYPE STRING,
SUPPL_PLNT TYPE STRING,
INCOTERMS1 TYPE STRING,
INCOTERMS2 TYPE STRING,
COLLECT_NO TYPE STRING,
DIFF_INV TYPE STRING,
OUR_REF TYPE STRING,
LOGSYSTEM TYPE STRING,
SUBITEMINT TYPE STRING,
PO_REL_IND TYPE STRING,
REL_STATUS TYPE STRING,
VAT_CNTRY TYPE STRING,
VAT_CNTRY_ISO TYPE STRING,
REASON_CANCEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/BAPIMEPOHEADER_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_/SCWM/BAPIMEPOHEADER_STR-PO_NUMBER sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-COMP_CODE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DOC_TYPE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DELETE_IND sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-STATUS sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-CREAT_DATE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-CREATED_BY sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-ITEM_INTVL sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-VENDOR sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-LANGU sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-LANGU_ISO sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-PMNTTRMS sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DSCNT1_TO sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DSCNT2_TO sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DSCNT3_TO sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DSCT_PCT1 sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DSCT_PCT2 sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-PURCH_ORG sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-PUR_GROUP sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-CURRENCY sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-CURRENCY_ISO sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-EXCH_RATE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-EX_RATE_FX sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DOC_DATE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-VPER_START sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-VPER_END sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-WARRANTY sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-QUOTATION sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-QUOT_DATE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-REF_1 sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-SALES_PERS sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-TELEPHONE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-SUPPL_VEND sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-CUSTOMER sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-AGREEMENT sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-GR_MESSAGE sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-SUPPL_PLNT sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-INCOTERMS1 sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-INCOTERMS2 sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-COLLECT_NO sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-DIFF_INV sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-OUR_REF sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-LOGSYSTEM sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-SUBITEMINT sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-PO_REL_IND sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-REL_STATUS sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-VAT_CNTRY sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-VAT_CNTRY_ISO sy-vline 
WA_/SCWM/BAPIMEPOHEADER_STR-REASON_CANCEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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