ABAP Select data from SAP table /SAPAPO/MTCOM into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MTCOM
*  INTO TABLE @DATA(IT_/SAPAPO/MTCOM2).
*--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_/SAPAPO/MTCOM INDEX 1 INTO DATA(WA_/SAPAPO/MTCOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MTCOM>-KENNG = 1.
</SAPAPO/MTCOM>-MATNR = 1.
</SAPAPO/MTCOM>-BUKRS = 1.
</SAPAPO/MTCOM>-WERKS = 1.
</SAPAPO/MTCOM>-LGORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MTCOM-CHARG, sy-vline,
  WA_/SAPAPO/MTCOM-LGNUM, sy-vline,
  WA_/SAPAPO/MTCOM-LGTYP, sy-vline,
  WA_/SAPAPO/MTCOM-MYKEY, sy-vline,
  WA_/SAPAPO/MTCOM-BWKEY, sy-vline,
  WA_/SAPAPO/MTCOM-BWTAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MTCOM 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_/SAPAPO/MTCOM 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_/SAPAPO/MTCOM INTO WA_/SAPAPO/MTCOM.


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

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

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MTCOM-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MTCOM-MEINH.
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_/SAPAPO/MTCOM_STR, 
KENNG TYPE STRING,
MATNR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
MYKEY TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPRAS TYPE STRING,
MEINH TYPE STRING,
PSTAT TYPE STRING,
XRUEJ TYPE STRING,
XRUEM TYPE STRING,
EKWSL TYPE STRING,
NOMUS TYPE STRING,
MTART TYPE STRING,
DISMM TYPE STRING,
DISLS TYPE STRING,
NOVOR TYPE STRING,
LIFNR TYPE STRING,
SOBKZ TYPE STRING,
BWTTY TYPE STRING,
ALAND TYPE STRING,
MMSTA TYPE STRING,
MSTAE TYPE STRING,
VMSTA TYPE STRING,
MSTAV TYPE STRING,
LIFSP_MVKE TYPE STRING,
LIFSP_MARA TYPE STRING,
KZSPR TYPE STRING,
KZSPM TYPE STRING,
SPART TYPE STRING,
KZRFB TYPE STRING,
KUNNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
VERID TYPE STRING,
KZVPL TYPE STRING,
MAXTZ TYPE STRING,
PSPNR TYPE STRING,
SOBSL TYPE STRING,
XVKBW TYPE STRING,
KZISO TYPE STRING,
NOPLTRS TYPE STRING,
SAEXC TYPE STRING,
WVEXC TYPE STRING,
DATUM TYPE STRING,
T141_FELD TYPE STRING,
KZBWS TYPE STRING,
KZMPN TYPE STRING,
SYSDEF TYPE STRING,
WAITLOCK TYPE STRING,
NO_RFMARA TYPE STRING,
NO_RFMAKT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MTCOM_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_/SAPAPO/MTCOM_STR-KENNG sy-vline 
WA_/SAPAPO/MTCOM_STR-MATNR sy-vline 
WA_/SAPAPO/MTCOM_STR-BUKRS sy-vline 
WA_/SAPAPO/MTCOM_STR-WERKS sy-vline 
WA_/SAPAPO/MTCOM_STR-LGORT sy-vline 
WA_/SAPAPO/MTCOM_STR-CHARG sy-vline 
WA_/SAPAPO/MTCOM_STR-LGNUM sy-vline 
WA_/SAPAPO/MTCOM_STR-LGTYP sy-vline 
WA_/SAPAPO/MTCOM_STR-MYKEY sy-vline 
WA_/SAPAPO/MTCOM_STR-BWKEY sy-vline 
WA_/SAPAPO/MTCOM_STR-BWTAR sy-vline 
WA_/SAPAPO/MTCOM_STR-VKORG sy-vline 
WA_/SAPAPO/MTCOM_STR-VTWEG sy-vline 
WA_/SAPAPO/MTCOM_STR-SPRAS sy-vline 
WA_/SAPAPO/MTCOM_STR-MEINH sy-vline 
WA_/SAPAPO/MTCOM_STR-PSTAT sy-vline 
WA_/SAPAPO/MTCOM_STR-XRUEJ sy-vline 
WA_/SAPAPO/MTCOM_STR-XRUEM sy-vline 
WA_/SAPAPO/MTCOM_STR-EKWSL sy-vline 
WA_/SAPAPO/MTCOM_STR-NOMUS sy-vline 
WA_/SAPAPO/MTCOM_STR-MTART sy-vline 
WA_/SAPAPO/MTCOM_STR-DISMM sy-vline 
WA_/SAPAPO/MTCOM_STR-DISLS sy-vline 
WA_/SAPAPO/MTCOM_STR-NOVOR sy-vline 
WA_/SAPAPO/MTCOM_STR-LIFNR sy-vline 
WA_/SAPAPO/MTCOM_STR-SOBKZ sy-vline 
WA_/SAPAPO/MTCOM_STR-BWTTY sy-vline 
WA_/SAPAPO/MTCOM_STR-ALAND sy-vline 
WA_/SAPAPO/MTCOM_STR-MMSTA sy-vline 
WA_/SAPAPO/MTCOM_STR-MSTAE sy-vline 
WA_/SAPAPO/MTCOM_STR-VMSTA sy-vline 
WA_/SAPAPO/MTCOM_STR-MSTAV sy-vline 
WA_/SAPAPO/MTCOM_STR-LIFSP_MVKE sy-vline 
WA_/SAPAPO/MTCOM_STR-LIFSP_MARA sy-vline 
WA_/SAPAPO/MTCOM_STR-KZSPR sy-vline 
WA_/SAPAPO/MTCOM_STR-KZSPM sy-vline 
WA_/SAPAPO/MTCOM_STR-SPART sy-vline 
WA_/SAPAPO/MTCOM_STR-KZRFB sy-vline 
WA_/SAPAPO/MTCOM_STR-KUNNR sy-vline 
WA_/SAPAPO/MTCOM_STR-VBELN sy-vline 
WA_/SAPAPO/MTCOM_STR-POSNR sy-vline 
WA_/SAPAPO/MTCOM_STR-VERID sy-vline 
WA_/SAPAPO/MTCOM_STR-KZVPL sy-vline 
WA_/SAPAPO/MTCOM_STR-MAXTZ sy-vline 
WA_/SAPAPO/MTCOM_STR-PSPNR sy-vline 
WA_/SAPAPO/MTCOM_STR-SOBSL sy-vline 
WA_/SAPAPO/MTCOM_STR-XVKBW sy-vline 
WA_/SAPAPO/MTCOM_STR-KZISO sy-vline 
WA_/SAPAPO/MTCOM_STR-NOPLTRS sy-vline 
WA_/SAPAPO/MTCOM_STR-SAEXC sy-vline 
WA_/SAPAPO/MTCOM_STR-WVEXC sy-vline 
WA_/SAPAPO/MTCOM_STR-DATUM sy-vline 
WA_/SAPAPO/MTCOM_STR-T141_FELD sy-vline 
WA_/SAPAPO/MTCOM_STR-KZBWS sy-vline 
WA_/SAPAPO/MTCOM_STR-KZMPN sy-vline 
WA_/SAPAPO/MTCOM_STR-SYSDEF sy-vline 
WA_/SAPAPO/MTCOM_STR-WAITLOCK sy-vline 
WA_/SAPAPO/MTCOM_STR-NO_RFMARA sy-vline 
WA_/SAPAPO/MTCOM_STR-NO_RFMAKT sy-vline      INTO ld_text SEPARATED BY SPACE.

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