ABAP Select data from SAP table IACMDPQSC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IACMDPQSC
*  INTO TABLE @DATA(IT_IACMDPQSC2).
*--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_IACMDPQSC INDEX 1 INTO DATA(WA_IACMDPQSC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IACMDPQSC>-MANDT = 1.
<IACMDPQSC>-DISCPREMQTYSCHEDULEUUID = 1.
<IACMDPQSC>-DISCPREMQTYCHARCSUUID = 1.
<IACMDPQSC>-DISCPREMQTYINTCHAR = 1.
<IACMDPQSC>-DISCPREMQTYCHARCSNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IACMDPQSC-DISCPREMQTYCHARCSTYPE, sy-vline,
  WA_IACMDPQSC-DISCPREMQTYAPPLIESTOCODE, sy-vline,
  WA_IACMDPQSC-DISCPREMQTYSEQNO, sy-vline,
  WA_IACMDPQSC-DISCPREMQTYGOVANALYSISCODE, sy-vline,
  WA_IACMDPQSC-PREMDISCRATEINVALSCHEDCRCY, sy-vline,
  WA_IACMDPQSC-DISCPREMQTYUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IACMDPQSC 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_IACMDPQSC 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_IACMDPQSC INTO WA_IACMDPQSC.


*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 ATINN, internal->external for field DISCPREMQTYINTCHAR
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_IACMDPQSC-DISCPREMQTYINTCHAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IACMDPQSC-DISCPREMQTYINTCHAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DISCPREMQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IACMDPQSC-DISCPREMQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IACMDPQSC-DISCPREMQTYUNIT.
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_IACMDPQSC_STR, 
MANDT TYPE STRING,
DISCPREMQTYSCHEDULEUUID TYPE STRING,
DISCPREMQTYCHARCSUUID TYPE STRING,
DISCPREMQTYINTCHAR TYPE STRING,
DISCPREMQTYCHARCSNAME TYPE STRING,
DISCPREMQTYCHARCSTYPE TYPE STRING,
DISCPREMQTYAPPLIESTOCODE TYPE STRING,
DISCPREMQTYSEQNO TYPE STRING,
DISCPREMQTYGOVANALYSISCODE TYPE STRING,
PREMDISCRATEINVALSCHEDCRCY TYPE STRING,
DISCPREMQTYUNIT TYPE STRING,
DISCPREMQTYTYPE TYPE STRING,
DISCPREMQTYCALCMETHODCODE TYPE STRING,
DISCPREMQTYAVGMETHOD TYPE STRING,
DISCPREMQTYROUNDINGDIRECTION TYPE STRING,
DISCPREMANALYSISREQ TYPE STRING,
DISCPREMQTYRULE TYPE STRING,
DISCPREMQTYDERIVEDRULE TYPE STRING,
DISCPREMQTYNOOFDECPLACES TYPE STRING,
DISCPREMQTYISCONFIRMPRINT TYPE STRING,
DISCPRAMQTYISAFFECTSSETTLE TYPE STRING,
DISCPREMQTYISAFFECTSAPPL TYPE STRING,
DISCPREMQTYCONTRPRICETYPE TYPE STRING,
DISCPREMQTYISSTOPAPPL TYPE STRING,
DISCPREMQTYISSTOPSETTLMT TYPE STRING,
DISCPREMQTYVOLCALCRULE TYPE STRING,
DISCPREMQTYISBASENET TYPE STRING,
DISCPREMQTYHASBASEPRICEFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IACMDPQSC_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_IACMDPQSC_STR-MANDT sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYSCHEDULEUUID sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYCHARCSUUID sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYINTCHAR sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYCHARCSNAME sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYCHARCSTYPE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYAPPLIESTOCODE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYSEQNO sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYGOVANALYSISCODE sy-vline 
WA_IACMDPQSC_STR-PREMDISCRATEINVALSCHEDCRCY sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYUNIT sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYTYPE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYCALCMETHODCODE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYAVGMETHOD sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYROUNDINGDIRECTION sy-vline 
WA_IACMDPQSC_STR-DISCPREMANALYSISREQ sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYRULE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYDERIVEDRULE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYNOOFDECPLACES sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYISCONFIRMPRINT sy-vline 
WA_IACMDPQSC_STR-DISCPRAMQTYISAFFECTSSETTLE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYISAFFECTSAPPL sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYCONTRPRICETYPE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYISSTOPAPPL sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYISSTOPSETTLMT sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYVOLCALCRULE sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYISBASENET sy-vline 
WA_IACMDPQSC_STR-DISCPREMQTYHASBASEPRICEFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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