ABAP Select data from SAP table V_ML_ACDOC_EX_AG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_ML_ACDOC_EX_AG
*  INTO TABLE @DATA(IT_V_ML_ACDOC_EX_AG2).
*--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_V_ML_ACDOC_EX_AG INDEX 1 INTO DATA(WA_V_ML_ACDOC_EX_AG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_ML_ACDOC_EX_AG>-RCLNT = 1.
<V_ML_ACDOC_EX_AG>-RLDNR = 1.
<V_ML_ACDOC_EX_AG>-RBUKRS = 1.
<V_ML_ACDOC_EX_AG>-KALNR = 1.
<V_ML_ACDOC_EX_AG>-FISCYEARPER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_ML_ACDOC_EX_AG-RYEAR, sy-vline,
  WA_V_ML_ACDOC_EX_AG-POPER, sy-vline,
  WA_V_ML_ACDOC_EX_AG-MATNR, sy-vline,
  WA_V_ML_ACDOC_EX_AG-BWKEY, sy-vline,
  WA_V_ML_ACDOC_EX_AG-BWTAR, sy-vline,
  WA_V_ML_ACDOC_EX_AG-ML_SOBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_ML_ACDOC_EX_AG 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_V_ML_ACDOC_EX_AG 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_V_ML_ACDOC_EX_AG INTO WA_V_ML_ACDOC_EX_AG.


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

*Conversion exit PERI7, internal->external for field FISCYEARPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_V_ML_ACDOC_EX_AG-FISCYEARPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_ML_ACDOC_EX_AG-FISCYEARPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_V_ML_ACDOC_EX_AG-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_ML_ACDOC_EX_AG-RYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSP, internal->external for field ML_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_V_ML_ACDOC_EX_AG-ML_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_ML_ACDOC_EX_AG-ML_PSPNR.
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_V_ML_ACDOC_EX_AG_STR, 
RCLNT TYPE STRING,
RLDNR TYPE STRING,
RBUKRS TYPE STRING,
KALNR TYPE STRING,
FISCYEARPER TYPE STRING,
RYEAR TYPE STRING,
POPER TYPE STRING,
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
ML_SOBKZ TYPE STRING,
ML_KDAUF TYPE STRING,
ML_KDPOS TYPE STRING,
ML_LIFNR TYPE STRING,
ML_PSPNR TYPE STRING,
VMSL TYPE STRING,
HSL TYPE STRING,
HVKWRT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_ML_ACDOC_EX_AG_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_V_ML_ACDOC_EX_AG_STR-RCLNT sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-RLDNR sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-RBUKRS sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-KALNR sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-FISCYEARPER sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-RYEAR sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-POPER sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-MATNR sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-BWKEY sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-BWTAR sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-ML_SOBKZ sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-ML_KDAUF sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-ML_KDPOS sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-ML_LIFNR sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-ML_PSPNR sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-VMSL sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-HSL sy-vline 
WA_V_ML_ACDOC_EX_AG_STR-HVKWRT sy-vline      INTO ld_text SEPARATED BY SPACE.

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