ABAP Select data from SAP table IDMX_VAT_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IDMX_VAT_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 IDMX_VAT_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 IDMX_VAT_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_IDMX_VAT_ALV TYPE STANDARD TABLE OF IDMX_VAT_ALV,
      WA_IDMX_VAT_ALV TYPE IDMX_VAT_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: <IDMX_VAT_ALV> TYPE IDMX_VAT_ALV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDMX_VAT_ALV
*  INTO TABLE @DATA(IT_IDMX_VAT_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_IDMX_VAT_ALV INDEX 1 INTO DATA(WA_IDMX_VAT_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDMX_VAT_ALV>-ID = 1.
<IDMX_VAT_ALV>-CONCEPT = 1.
<IDMX_VAT_ALV>-M1 = 1.
<IDMX_VAT_ALV>-M2 = 1.
<IDMX_VAT_ALV>-M3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDMX_VAT_ALV-M4, sy-vline,
  WA_IDMX_VAT_ALV-M5, sy-vline,
  WA_IDMX_VAT_ALV-M6, sy-vline,
  WA_IDMX_VAT_ALV-M7, sy-vline,
  WA_IDMX_VAT_ALV-M8, sy-vline,
  WA_IDMX_VAT_ALV-M9, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDMX_VAT_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_IDMX_VAT_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_IDMX_VAT_ALV INTO WA_IDMX_VAT_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 AC152, internal->external for field M1
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M2
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M3
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M4
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M5
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M5.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M6
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M6
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M6.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M7
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M7
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M7.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M8
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M8
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M8.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M9
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M9
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M9.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M10
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M10
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M10.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M11
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M11.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field M12
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-M12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-M12.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SM
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDMX_VAT_ALV-SM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDMX_VAT_ALV-SM.
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_IDMX_VAT_ALV_STR, 
ID TYPE STRING,
CONCEPT TYPE STRING,
M1 TYPE STRING,
M2 TYPE STRING,
M3 TYPE STRING,
M4 TYPE STRING,
M5 TYPE STRING,
M6 TYPE STRING,
M7 TYPE STRING,
M8 TYPE STRING,
M9 TYPE STRING,
M10 TYPE STRING,
M11 TYPE STRING,
M12 TYPE STRING,
SM TYPE STRING,
REMARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDMX_VAT_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_IDMX_VAT_ALV_STR-ID sy-vline 
WA_IDMX_VAT_ALV_STR-CONCEPT sy-vline 
WA_IDMX_VAT_ALV_STR-M1 sy-vline 
WA_IDMX_VAT_ALV_STR-M2 sy-vline 
WA_IDMX_VAT_ALV_STR-M3 sy-vline 
WA_IDMX_VAT_ALV_STR-M4 sy-vline 
WA_IDMX_VAT_ALV_STR-M5 sy-vline 
WA_IDMX_VAT_ALV_STR-M6 sy-vline 
WA_IDMX_VAT_ALV_STR-M7 sy-vline 
WA_IDMX_VAT_ALV_STR-M8 sy-vline 
WA_IDMX_VAT_ALV_STR-M9 sy-vline 
WA_IDMX_VAT_ALV_STR-M10 sy-vline 
WA_IDMX_VAT_ALV_STR-M11 sy-vline 
WA_IDMX_VAT_ALV_STR-M12 sy-vline 
WA_IDMX_VAT_ALV_STR-SM sy-vline 
WA_IDMX_VAT_ALV_STR-REMARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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