ABAP Select data from SAP table MCPOSREC into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCPOSREC 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 MCPOSREC. 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 MCPOSREC 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_MCPOSREC TYPE STANDARD TABLE OF MCPOSREC,
      WA_MCPOSREC TYPE MCPOSREC,
      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: <MCPOSREC> TYPE MCPOSREC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCPOSREC
*  INTO TABLE @DATA(IT_MCPOSREC2).
*--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_MCPOSREC INDEX 1 INTO DATA(WA_MCPOSREC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCPOSREC>-MANDT = 1.
<MCPOSREC>-BASUNI = 1.
<MCPOSREC>-SALUNI = 1.
<MCPOSREC>-POSCUR = 1.
<MCPOSREC>-LOCCUR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCPOSREC-EXCHANG, sy-vline,
  WA_MCPOSREC-POSDAT, sy-vline,
  WA_MCPOSREC-POSTIM, sy-vline,
  WA_MCPOSREC-WEEKDAY, sy-vline,
  WA_MCPOSREC-STORE, sy-vline,
  WA_MCPOSREC-ASCAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCPOSREC 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_MCPOSREC 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_MCPOSREC INTO WA_MCPOSREC.


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

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

*Conversion exit EXCRT, internal->external for field EXCHANG
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCPOSREC-EXCHANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCPOSREC-EXCHANG.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit EAN11, internal->external for field EANUPC
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_MCPOSREC-EANUPC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCPOSREC-EANUPC.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field CUSTOM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCPOSREC-CUSTOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCPOSREC-CUSTOM.
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_MCPOSREC_STR, 
MANDT TYPE STRING,
BASUNI TYPE STRING,
SALUNI TYPE STRING,
POSCUR TYPE STRING,
LOCCUR TYPE STRING,
EXCHANG TYPE STRING,
POSDAT TYPE STRING,
POSTIM TYPE STRING,
WEEKDAY TYPE STRING,
STORE TYPE STRING,
ASCAR TYPE STRING,
SALGRP TYPE STRING,
SALNO TYPE STRING,
POSCTR TYPE STRING,
POSNO TYPE STRING,
CSHRNO TYPE STRING,
CSHRNM TYPE STRING,
EANUPC TYPE STRING,
ARTICLE TYPE STRING,
MRCHGR TYPE STRING,
PROMNO TYPE STRING,
PROMOFL TYPE STRING,
RECNO TYPE STRING,
CUSTOM TYPE STRING,
CARDNO TYPE STRING,
CARDNXT TYPE STRING,
CARDTY TYPE STRING,
BANKKEY TYPE STRING,
BANKAN TYPE STRING,
CONDTYS TYPE STRING,
TATYPE TYPE STRING,
CONDNO TYPE STRING,
CONDTYI TYPE STRING,
CONDID TYPE STRING,
PAYMETH TYPE STRING,
PAYDIR TYPE STRING,
SALQTYB TYPE STRING,
SALQTY TYPE STRING,
SALPP TYPE STRING,
SALES TYPE STRING,
SALTAX TYPE STRING,
CONTTAX TYPE STRING,
SALPRR TYPE STRING,
SALCPR TYPE STRING,
PAYSAL TYPE STRING,
COMACC TYPE STRING,
VALWOC TYPE STRING,
NOREC TYPE STRING,
NOMGR TYPE STRING,
NOART TYPE STRING,
NOUPC TYPE STRING,
NOPOS TYPE STRING,
NOCON TYPE STRING,
NOPAY TYPE STRING,
RECVAL TYPE STRING,
RECSIGN TYPE STRING,
ARTNO TYPE STRING,
SERNO TYPE STRING,
SALTYPE TYPE STRING,
DSCDCL TYPE STRING,
SCFLAG TYPE STRING,
DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCPOSREC_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_MCPOSREC_STR-MANDT sy-vline 
WA_MCPOSREC_STR-BASUNI sy-vline 
WA_MCPOSREC_STR-SALUNI sy-vline 
WA_MCPOSREC_STR-POSCUR sy-vline 
WA_MCPOSREC_STR-LOCCUR sy-vline 
WA_MCPOSREC_STR-EXCHANG sy-vline 
WA_MCPOSREC_STR-POSDAT sy-vline 
WA_MCPOSREC_STR-POSTIM sy-vline 
WA_MCPOSREC_STR-WEEKDAY sy-vline 
WA_MCPOSREC_STR-STORE sy-vline 
WA_MCPOSREC_STR-ASCAR sy-vline 
WA_MCPOSREC_STR-SALGRP sy-vline 
WA_MCPOSREC_STR-SALNO sy-vline 
WA_MCPOSREC_STR-POSCTR sy-vline 
WA_MCPOSREC_STR-POSNO sy-vline 
WA_MCPOSREC_STR-CSHRNO sy-vline 
WA_MCPOSREC_STR-CSHRNM sy-vline 
WA_MCPOSREC_STR-EANUPC sy-vline 
WA_MCPOSREC_STR-ARTICLE sy-vline 
WA_MCPOSREC_STR-MRCHGR sy-vline 
WA_MCPOSREC_STR-PROMNO sy-vline 
WA_MCPOSREC_STR-PROMOFL sy-vline 
WA_MCPOSREC_STR-RECNO sy-vline 
WA_MCPOSREC_STR-CUSTOM sy-vline 
WA_MCPOSREC_STR-CARDNO sy-vline 
WA_MCPOSREC_STR-CARDNXT sy-vline 
WA_MCPOSREC_STR-CARDTY sy-vline 
WA_MCPOSREC_STR-BANKKEY sy-vline 
WA_MCPOSREC_STR-BANKAN sy-vline 
WA_MCPOSREC_STR-CONDTYS sy-vline 
WA_MCPOSREC_STR-TATYPE sy-vline 
WA_MCPOSREC_STR-CONDNO sy-vline 
WA_MCPOSREC_STR-CONDTYI sy-vline 
WA_MCPOSREC_STR-CONDID sy-vline 
WA_MCPOSREC_STR-PAYMETH sy-vline 
WA_MCPOSREC_STR-PAYDIR sy-vline 
WA_MCPOSREC_STR-SALQTYB sy-vline 
WA_MCPOSREC_STR-SALQTY sy-vline 
WA_MCPOSREC_STR-SALPP sy-vline 
WA_MCPOSREC_STR-SALES sy-vline 
WA_MCPOSREC_STR-SALTAX sy-vline 
WA_MCPOSREC_STR-CONTTAX sy-vline 
WA_MCPOSREC_STR-SALPRR sy-vline 
WA_MCPOSREC_STR-SALCPR sy-vline 
WA_MCPOSREC_STR-PAYSAL sy-vline 
WA_MCPOSREC_STR-COMACC sy-vline 
WA_MCPOSREC_STR-VALWOC sy-vline 
WA_MCPOSREC_STR-NOREC sy-vline 
WA_MCPOSREC_STR-NOMGR sy-vline 
WA_MCPOSREC_STR-NOART sy-vline 
WA_MCPOSREC_STR-NOUPC sy-vline 
WA_MCPOSREC_STR-NOPOS sy-vline 
WA_MCPOSREC_STR-NOCON sy-vline 
WA_MCPOSREC_STR-NOPAY sy-vline 
WA_MCPOSREC_STR-RECVAL sy-vline 
WA_MCPOSREC_STR-RECSIGN sy-vline 
WA_MCPOSREC_STR-ARTNO sy-vline 
WA_MCPOSREC_STR-SERNO sy-vline 
WA_MCPOSREC_STR-SALTYPE sy-vline 
WA_MCPOSREC_STR-DSCDCL sy-vline 
WA_MCPOSREC_STR-SCFLAG sy-vline 
WA_MCPOSREC_STR-DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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