ABAP Select data from SAP table MCCOMVEPO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCCOMVEPO
*  INTO TABLE @DATA(IT_MCCOMVEPO2).
*--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_MCCOMVEPO INDEX 1 INTO DATA(WA_MCCOMVEPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCCOMVEPO>-MANDT = 1.
<MCCOMVEPO>-VENUM = 1.
<MCCOMVEPO>-VEPOS = 1.
<MCCOMVEPO>-VELIN = 1.
<MCCOMVEPO>-VBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCCOMVEPO-POSNR, sy-vline,
  WA_MCCOMVEPO-VBTYP, sy-vline,
  WA_MCCOMVEPO-UNVEL, sy-vline,
  WA_MCCOMVEPO-VEMNG, sy-vline,
  WA_MCCOMVEPO-VEMNG_FLO, sy-vline,
  WA_MCCOMVEPO-VEMEH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCCOMVEPO 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_MCCOMVEPO 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_MCCOMVEPO INTO WA_MCCOMVEPO.


*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 VENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCCOMVEPO-VENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCCOMVEPO-VENUM.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field TKNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCCOMVEPO-TKNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCCOMVEPO-TKNUM.
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_MCCOMVEPO_STR, 
MANDT TYPE STRING,
VENUM TYPE STRING,
VEPOS TYPE STRING,
VELIN TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
VBTYP TYPE STRING,
UNVEL TYPE STRING,
VEMNG TYPE STRING,
VEMNG_FLO TYPE STRING,
VEMEH TYPE STRING,
ALTME TYPE STRING,
VEANZ TYPE STRING,
KZBEI TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CUOBJ TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
QPLOS TYPE STRING,
ANZSN TYPE STRING,
SERAIL TYPE STRING,
PSTYV TYPE STRING,
POSNR_GEN TYPE STRING,
P_MATERIAL TYPE STRING,
WDATU TYPE STRING,
VFDAT TYPE STRING,
HU_LGORT TYPE STRING,
XCHAR TYPE STRING,
SPE_IDPLATE TYPE STRING,
SGT_SCAT TYPE STRING,
HANDLE_VEPO TYPE STRING,
_DATAAGING TYPE STRING,
/CWM/VEMNG TYPE STRING,
/CWM/VEMEH TYPE STRING,
/CWM/ALTME TYPE STRING,
WRF_CHARSTC1 TYPE STRING,
WRF_CHARSTC2 TYPE STRING,
WRF_CHARSTC3 TYPE STRING,
UPDKZ TYPE STRING,
SELKZ TYPE STRING,
BRGEW TYPE STRING,
VOLUM TYPE STRING,
GEWEI TYPE STRING,
VOLEH TYPE STRING,
VHART TYPE STRING,
VEBEZ TYPE STRING,
AENDB TYPE STRING,
VBELN_VBFA TYPE STRING,
HELP_TABIX TYPE STRING,
STATUS TYPE STRING,
SERPFL TYPE STRING,
BDMNG TYPE STRING,
UMLGO TYPE STRING,
MTPOS TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
KZPGN TYPE STRING,
ZEUGN TYPE STRING,
CUSTORD TYPE STRING,
CUSTORDIT TYPE STRING,
PURORD TYPE STRING,
PURORDIT TYPE STRING,
DLVRY TYPE STRING,
DLVRYIT TYPE STRING,
TKNUM TYPE STRING,
ACTIVITY TYPE STRING,
VPOBJ TYPE STRING,
OBJECT TYPE STRING,
SUPKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCCOMVEPO_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_MCCOMVEPO_STR-MANDT sy-vline 
WA_MCCOMVEPO_STR-VENUM sy-vline 
WA_MCCOMVEPO_STR-VEPOS sy-vline 
WA_MCCOMVEPO_STR-VELIN sy-vline 
WA_MCCOMVEPO_STR-VBELN sy-vline 
WA_MCCOMVEPO_STR-POSNR sy-vline 
WA_MCCOMVEPO_STR-VBTYP sy-vline 
WA_MCCOMVEPO_STR-UNVEL sy-vline 
WA_MCCOMVEPO_STR-VEMNG sy-vline 
WA_MCCOMVEPO_STR-VEMNG_FLO sy-vline 
WA_MCCOMVEPO_STR-VEMEH sy-vline 
WA_MCCOMVEPO_STR-ALTME sy-vline 
WA_MCCOMVEPO_STR-VEANZ sy-vline 
WA_MCCOMVEPO_STR-KZBEI sy-vline 
WA_MCCOMVEPO_STR-MATNR sy-vline 
WA_MCCOMVEPO_STR-CHARG sy-vline 
WA_MCCOMVEPO_STR-WERKS sy-vline 
WA_MCCOMVEPO_STR-LGORT sy-vline 
WA_MCCOMVEPO_STR-CUOBJ sy-vline 
WA_MCCOMVEPO_STR-BESTQ sy-vline 
WA_MCCOMVEPO_STR-SOBKZ sy-vline 
WA_MCCOMVEPO_STR-SONUM sy-vline 
WA_MCCOMVEPO_STR-QPLOS sy-vline 
WA_MCCOMVEPO_STR-ANZSN sy-vline 
WA_MCCOMVEPO_STR-SERAIL sy-vline 
WA_MCCOMVEPO_STR-PSTYV sy-vline 
WA_MCCOMVEPO_STR-POSNR_GEN sy-vline 
WA_MCCOMVEPO_STR-P_MATERIAL sy-vline 
WA_MCCOMVEPO_STR-WDATU sy-vline 
WA_MCCOMVEPO_STR-VFDAT sy-vline 
WA_MCCOMVEPO_STR-HU_LGORT sy-vline 
WA_MCCOMVEPO_STR-XCHAR sy-vline 
WA_MCCOMVEPO_STR-SPE_IDPLATE sy-vline 
WA_MCCOMVEPO_STR-SGT_SCAT sy-vline 
WA_MCCOMVEPO_STR-HANDLE_VEPO sy-vline 
WA_MCCOMVEPO_STR-_DATAAGING sy-vline 
WA_MCCOMVEPO_STR-/CWM/VEMNG sy-vline 
WA_MCCOMVEPO_STR-/CWM/VEMEH sy-vline 
WA_MCCOMVEPO_STR-/CWM/ALTME sy-vline 
WA_MCCOMVEPO_STR-WRF_CHARSTC1 sy-vline 
WA_MCCOMVEPO_STR-WRF_CHARSTC2 sy-vline 
WA_MCCOMVEPO_STR-WRF_CHARSTC3 sy-vline 
WA_MCCOMVEPO_STR-UPDKZ sy-vline 
WA_MCCOMVEPO_STR-SELKZ sy-vline 
WA_MCCOMVEPO_STR-BRGEW sy-vline 
WA_MCCOMVEPO_STR-VOLUM sy-vline 
WA_MCCOMVEPO_STR-GEWEI sy-vline 
WA_MCCOMVEPO_STR-VOLEH sy-vline 
WA_MCCOMVEPO_STR-VHART sy-vline 
WA_MCCOMVEPO_STR-VEBEZ sy-vline 
WA_MCCOMVEPO_STR-AENDB sy-vline 
WA_MCCOMVEPO_STR-VBELN_VBFA sy-vline 
WA_MCCOMVEPO_STR-HELP_TABIX sy-vline 
WA_MCCOMVEPO_STR-STATUS sy-vline 
WA_MCCOMVEPO_STR-SERPFL sy-vline 
WA_MCCOMVEPO_STR-BDMNG sy-vline 
WA_MCCOMVEPO_STR-UMLGO sy-vline 
WA_MCCOMVEPO_STR-MTPOS sy-vline 
WA_MCCOMVEPO_STR-LGNUM sy-vline 
WA_MCCOMVEPO_STR-LGTYP sy-vline 
WA_MCCOMVEPO_STR-LGPLA sy-vline 
WA_MCCOMVEPO_STR-KZPGN sy-vline 
WA_MCCOMVEPO_STR-ZEUGN sy-vline 
WA_MCCOMVEPO_STR-CUSTORD sy-vline 
WA_MCCOMVEPO_STR-CUSTORDIT sy-vline 
WA_MCCOMVEPO_STR-PURORD sy-vline 
WA_MCCOMVEPO_STR-PURORDIT sy-vline 
WA_MCCOMVEPO_STR-DLVRY sy-vline 
WA_MCCOMVEPO_STR-DLVRYIT sy-vline 
WA_MCCOMVEPO_STR-TKNUM sy-vline 
WA_MCCOMVEPO_STR-ACTIVITY sy-vline 
WA_MCCOMVEPO_STR-VPOBJ sy-vline 
WA_MCCOMVEPO_STR-OBJECT sy-vline 
WA_MCCOMVEPO_STR-SUPKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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