ABAP Select data from SAP table ACDOC_SI_ML into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACDOC_SI_ML
*  INTO TABLE @DATA(IT_ACDOC_SI_ML2).
*--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_ACDOC_SI_ML INDEX 1 INTO DATA(WA_ACDOC_SI_ML2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACDOC_SI_ML>-KALNR = 1.
<ACDOC_SI_ML>-VPRSV = 1.
<ACDOC_SI_ML>-MLAST = 1.
<ACDOC_SI_ML>-KZBWS = 1.
<ACDOC_SI_ML>-XOBEW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACDOC_SI_ML-SOBKZ, sy-vline,
  WA_ACDOC_SI_ML-VTSTAMP, sy-vline,
  WA_ACDOC_SI_ML-MAT_KDAUF, sy-vline,
  WA_ACDOC_SI_ML-MAT_KDPOS, sy-vline,
  WA_ACDOC_SI_ML-MAT_PSPNR, sy-vline,
  WA_ACDOC_SI_ML-MAT_PS_POSID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACDOC_SI_ML 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_ACDOC_SI_ML 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_ACDOC_SI_ML INTO WA_ACDOC_SI_ML.


*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 MAT_KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACDOC_SI_ML-MAT_KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACDOC_SI_ML-MAT_KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field MAT_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ACDOC_SI_ML-MAT_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACDOC_SI_ML-MAT_PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field MAT_PS_POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_ACDOC_SI_ML-MAT_PS_POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACDOC_SI_ML-MAT_PS_POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MAT_LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACDOC_SI_ML-MAT_LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACDOC_SI_ML-MAT_LIFNR.
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_ACDOC_SI_ML_STR, 
KALNR TYPE STRING,
VPRSV TYPE STRING,
MLAST TYPE STRING,
KZBWS TYPE STRING,
XOBEW TYPE STRING,
SOBKZ TYPE STRING,
VTSTAMP TYPE STRING,
MAT_KDAUF TYPE STRING,
MAT_KDPOS TYPE STRING,
MAT_PSPNR TYPE STRING,
MAT_PS_POSID TYPE STRING,
MAT_LIFNR TYPE STRING,
BWTAR TYPE STRING,
BWKEY TYPE STRING,
HPEINH TYPE STRING,
KPEINH TYPE STRING,
OPEINH TYPE STRING,
VPEINH TYPE STRING,
MLPTYP TYPE STRING,
MLCATEG TYPE STRING,
QSBVALT TYPE STRING,
QSPROCESS TYPE STRING,
PERART TYPE STRING,
MLPOSNR TYPE STRING,
INV_MOV_CATEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACDOC_SI_ML_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_ACDOC_SI_ML_STR-KALNR sy-vline 
WA_ACDOC_SI_ML_STR-VPRSV sy-vline 
WA_ACDOC_SI_ML_STR-MLAST sy-vline 
WA_ACDOC_SI_ML_STR-KZBWS sy-vline 
WA_ACDOC_SI_ML_STR-XOBEW sy-vline 
WA_ACDOC_SI_ML_STR-SOBKZ sy-vline 
WA_ACDOC_SI_ML_STR-VTSTAMP sy-vline 
WA_ACDOC_SI_ML_STR-MAT_KDAUF sy-vline 
WA_ACDOC_SI_ML_STR-MAT_KDPOS sy-vline 
WA_ACDOC_SI_ML_STR-MAT_PSPNR sy-vline 
WA_ACDOC_SI_ML_STR-MAT_PS_POSID sy-vline 
WA_ACDOC_SI_ML_STR-MAT_LIFNR sy-vline 
WA_ACDOC_SI_ML_STR-BWTAR sy-vline 
WA_ACDOC_SI_ML_STR-BWKEY sy-vline 
WA_ACDOC_SI_ML_STR-HPEINH sy-vline 
WA_ACDOC_SI_ML_STR-KPEINH sy-vline 
WA_ACDOC_SI_ML_STR-OPEINH sy-vline 
WA_ACDOC_SI_ML_STR-VPEINH sy-vline 
WA_ACDOC_SI_ML_STR-MLPTYP sy-vline 
WA_ACDOC_SI_ML_STR-MLCATEG sy-vline 
WA_ACDOC_SI_ML_STR-QSBVALT sy-vline 
WA_ACDOC_SI_ML_STR-QSPROCESS sy-vline 
WA_ACDOC_SI_ML_STR-PERART sy-vline 
WA_ACDOC_SI_ML_STR-MLPOSNR sy-vline 
WA_ACDOC_SI_ML_STR-INV_MOV_CATEG sy-vline      INTO ld_text SEPARATED BY SPACE.

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