ABAP Select data from SAP table QAMVRMS_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QAMVRMS_ALV
*  INTO TABLE @DATA(IT_QAMVRMS_ALV2).
*--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_QAMVRMS_ALV INDEX 1 INTO DATA(WA_QAMVRMS_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QAMVRMS_ALV>-TEXT = 1.
<QAMVRMS_ALV>-MBEWERTG = 1.
<QAMVRMS_ALV>-MBEWERTGMS = 1.
<QAMVRMS_ALV>-EINFELD = 1.
<QAMVRMS_ALV>-AUSWMGWRK1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QAMVRMS_ALV-AUSWMENGE1, sy-vline,
  WA_QAMVRMS_ALV-VORGABE, sy-vline,
  WA_QAMVRMS_ALV-ISTWERT, sy-vline,
  WA_QAMVRMS_ALV-MASSEINHSW, sy-vline,
  WA_QAMVRMS_ALV-SOLLWERTC, sy-vline,
  WA_QAMVRMS_ALV-TOLOBC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QAMVRMS_ALV 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_QAMVRMS_ALV 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_QAMVRMS_ALV INTO WA_QAMVRMS_ALV.


*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 MASSEINHSW
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_QAMVRMS_ALV-MASSEINHSW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QAMVRMS_ALV-MASSEINHSW.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_QAMVRMS_ALV-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QAMVRMS_ALV-VORNR.
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_QAMVRMS_ALV_STR, 
TEXT TYPE STRING,
MBEWERTG TYPE STRING,
MBEWERTGMS TYPE STRING,
EINFELD TYPE STRING,
AUSWMGWRK1 TYPE STRING,
AUSWMENGE1 TYPE STRING,
VORGABE TYPE STRING,
ISTWERT TYPE STRING,
MASSEINHSW TYPE STRING,
SOLLWERTC TYPE STRING,
TOLOBC TYPE STRING,
TOLUNC TYPE STRING,
GRENZOB1C TYPE STRING,
GRENZUN1C TYPE STRING,
GRENZOB2C TYPE STRING,
GRENZUN2C TYPE STRING,
PRUEFLOS TYPE STRING,
VORGLFNR TYPE STRING,
VORNR TYPE STRING,
MERKNR TYPE STRING,
REFOBJ TYPE STRING,
PROBENR TYPE STRING,
KATALGART1 TYPE STRING,
SATZSTATUS TYPE STRING,
RECTYPE TYPE STRING,
STELLEN TYPE STRING,
DUMMY10 TYPE STRING,
DUMMY20 TYPE STRING,
DUMMY40 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QAMVRMS_ALV_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_QAMVRMS_ALV_STR-TEXT sy-vline 
WA_QAMVRMS_ALV_STR-MBEWERTG sy-vline 
WA_QAMVRMS_ALV_STR-MBEWERTGMS sy-vline 
WA_QAMVRMS_ALV_STR-EINFELD sy-vline 
WA_QAMVRMS_ALV_STR-AUSWMGWRK1 sy-vline 
WA_QAMVRMS_ALV_STR-AUSWMENGE1 sy-vline 
WA_QAMVRMS_ALV_STR-VORGABE sy-vline 
WA_QAMVRMS_ALV_STR-ISTWERT sy-vline 
WA_QAMVRMS_ALV_STR-MASSEINHSW sy-vline 
WA_QAMVRMS_ALV_STR-SOLLWERTC sy-vline 
WA_QAMVRMS_ALV_STR-TOLOBC sy-vline 
WA_QAMVRMS_ALV_STR-TOLUNC sy-vline 
WA_QAMVRMS_ALV_STR-GRENZOB1C sy-vline 
WA_QAMVRMS_ALV_STR-GRENZUN1C sy-vline 
WA_QAMVRMS_ALV_STR-GRENZOB2C sy-vline 
WA_QAMVRMS_ALV_STR-GRENZUN2C sy-vline 
WA_QAMVRMS_ALV_STR-PRUEFLOS sy-vline 
WA_QAMVRMS_ALV_STR-VORGLFNR sy-vline 
WA_QAMVRMS_ALV_STR-VORNR sy-vline 
WA_QAMVRMS_ALV_STR-MERKNR sy-vline 
WA_QAMVRMS_ALV_STR-REFOBJ sy-vline 
WA_QAMVRMS_ALV_STR-PROBENR sy-vline 
WA_QAMVRMS_ALV_STR-KATALGART1 sy-vline 
WA_QAMVRMS_ALV_STR-SATZSTATUS sy-vline 
WA_QAMVRMS_ALV_STR-RECTYPE sy-vline 
WA_QAMVRMS_ALV_STR-STELLEN sy-vline 
WA_QAMVRMS_ALV_STR-DUMMY10 sy-vline 
WA_QAMVRMS_ALV_STR-DUMMY20 sy-vline 
WA_QAMVRMS_ALV_STR-DUMMY40 sy-vline      INTO ld_text SEPARATED BY SPACE.

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