ABAP Select data from SAP table MCVAVCNCHA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCVAVCNCHA
*  INTO TABLE @DATA(IT_MCVAVCNCHA2).
*--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_MCVAVCNCHA INDEX 1 INTO DATA(WA_MCVAVCNCHA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCVAVCNCHA>-MATNR = 1.
<MCVAVCNCHA>-PRODH = 1.
<MCVAVCNCHA>-MATKL = 1.
<MCVAVCNCHA>-CHARG = 1.
<MCVAVCNCHA>-FAKSP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCVAVCNCHA-WERKS, sy-vline,
  WA_MCVAVCNCHA-LGORT, sy-vline,
  WA_MCVAVCNCHA-VSTEL, sy-vline,
  WA_MCVAVCNCHA-ROUTE, sy-vline,
  WA_MCVAVCNCHA-SPART, sy-vline,
  WA_MCVAVCNCHA-PKUNWE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCVAVCNCHA 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_MCVAVCNCHA 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_MCVAVCNCHA INTO WA_MCVAVCNCHA.


*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_MCVAVCNCHA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVAVCNCHA-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

*Conversion exit ABPSN, internal->external for field PS_POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_MCVAVCNCHA-PS_POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVAVCNCHA-PS_POSID.
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_MCVAVCNCHA_STR, 
MATNR TYPE STRING,
PRODH TYPE STRING,
MATKL TYPE STRING,
CHARG TYPE STRING,
FAKSP TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
VSTEL TYPE STRING,
ROUTE TYPE STRING,
SPART TYPE STRING,
PKUNWE TYPE STRING,
PKUNRE TYPE STRING,
PKUNRG TYPE STRING,
PSPDNR TYPE STRING,
PVRTNR TYPE STRING,
MVGR1 TYPE STRING,
MVGR2 TYPE STRING,
MVGR3 TYPE STRING,
MVGR4 TYPE STRING,
MVGR5 TYPE STRING,
ABSTA TYPE STRING,
KDGRP TYPE STRING,
BZIRK TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
ERDAT TYPE STRING,
STADAT TYPE STRING,
VRKME TYPE STRING,
MEINS TYPE STRING,
GEWEI TYPE STRING,
VOLEH TYPE STRING,
UMVKZ TYPE STRING,
UMVKN TYPE STRING,
KURSK TYPE STRING,
STCUR TYPE STRING,
NETPR TYPE STRING,
SHKZG TYPE STRING,
PS_POSID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCVAVCNCHA_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_MCVAVCNCHA_STR-MATNR sy-vline 
WA_MCVAVCNCHA_STR-PRODH sy-vline 
WA_MCVAVCNCHA_STR-MATKL sy-vline 
WA_MCVAVCNCHA_STR-CHARG sy-vline 
WA_MCVAVCNCHA_STR-FAKSP sy-vline 
WA_MCVAVCNCHA_STR-WERKS sy-vline 
WA_MCVAVCNCHA_STR-LGORT sy-vline 
WA_MCVAVCNCHA_STR-VSTEL sy-vline 
WA_MCVAVCNCHA_STR-ROUTE sy-vline 
WA_MCVAVCNCHA_STR-SPART sy-vline 
WA_MCVAVCNCHA_STR-PKUNWE sy-vline 
WA_MCVAVCNCHA_STR-PKUNRE sy-vline 
WA_MCVAVCNCHA_STR-PKUNRG sy-vline 
WA_MCVAVCNCHA_STR-PSPDNR sy-vline 
WA_MCVAVCNCHA_STR-PVRTNR sy-vline 
WA_MCVAVCNCHA_STR-MVGR1 sy-vline 
WA_MCVAVCNCHA_STR-MVGR2 sy-vline 
WA_MCVAVCNCHA_STR-MVGR3 sy-vline 
WA_MCVAVCNCHA_STR-MVGR4 sy-vline 
WA_MCVAVCNCHA_STR-MVGR5 sy-vline 
WA_MCVAVCNCHA_STR-ABSTA sy-vline 
WA_MCVAVCNCHA_STR-KDGRP sy-vline 
WA_MCVAVCNCHA_STR-BZIRK sy-vline 
WA_MCVAVCNCHA_STR-INCO1 sy-vline 
WA_MCVAVCNCHA_STR-INCO2 sy-vline 
WA_MCVAVCNCHA_STR-ERDAT sy-vline 
WA_MCVAVCNCHA_STR-STADAT sy-vline 
WA_MCVAVCNCHA_STR-VRKME sy-vline 
WA_MCVAVCNCHA_STR-MEINS sy-vline 
WA_MCVAVCNCHA_STR-GEWEI sy-vline 
WA_MCVAVCNCHA_STR-VOLEH sy-vline 
WA_MCVAVCNCHA_STR-UMVKZ sy-vline 
WA_MCVAVCNCHA_STR-UMVKN sy-vline 
WA_MCVAVCNCHA_STR-KURSK sy-vline 
WA_MCVAVCNCHA_STR-STCUR sy-vline 
WA_MCVAVCNCHA_STR-NETPR sy-vline 
WA_MCVAVCNCHA_STR-SHKZG sy-vline 
WA_MCVAVCNCHA_STR-PS_POSID sy-vline      INTO ld_text SEPARATED BY SPACE.

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