ABAP Select data from SAP table PMQ41 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PMQ41 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 PMQ41. 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 PMQ41 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_PMQ41 TYPE STANDARD TABLE OF PMQ41,
      WA_PMQ41 TYPE PMQ41,
      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: <PMQ41> TYPE PMQ41.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PMQ41.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PMQ41
  INTO TABLE IT_PMQ41.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMQ41
*  INTO TABLE @DATA(IT_PMQ412).
*--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_PMQ41 INDEX 1 INTO DATA(WA_PMQ412).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PMQ41 ASSIGNING <PMQ41>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMQ41>-PLSTE = 1.
<PMQ41>-PLSTX = 1.
<PMQ41>-INFOT = 1.
<PMQ41>-THEAD = 1.
<PMQ41>-LOPSE = 1.

ENDLOOP.

LOOP AT IT_PMQ41 INTO WA_PMQ41.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMQ41-LOPPX, sy-vline,
  WA_PMQ41-LOPVA, sy-vline,
  WA_PMQ41-LOPSB, sy-vline,
  WA_PMQ41-LOPBD, sy-vline,
  WA_PMQ41-LOPED, sy-vline,
  WA_PMQ41-PNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMQ41 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_PMQ41 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_PMQ41 INTO WA_PMQ41.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PMQ41_STR, 
PLSTE TYPE STRING,
PLSTX TYPE STRING,
INFOT TYPE STRING,
THEAD TYPE STRING,
LOPSE TYPE STRING,
LOPPX TYPE STRING,
LOPVA TYPE STRING,
LOPSB TYPE STRING,
LOPBD TYPE STRING,
LOPED TYPE STRING,
PNUM TYPE STRING,
TOTAL TYPE STRING,
HEAD1 TYPE STRING,
LOP1O TYPE STRING,
LOP1X TYPE STRING,
LOP1B TYPE STRING,
LOP1E TYPE STRING,
PNUM1 TYPE STRING,
TOTA1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMQ41_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_PMQ41_STR-PLSTE sy-vline 
WA_PMQ41_STR-PLSTX sy-vline 
WA_PMQ41_STR-INFOT sy-vline 
WA_PMQ41_STR-THEAD sy-vline 
WA_PMQ41_STR-LOPSE sy-vline 
WA_PMQ41_STR-LOPPX sy-vline 
WA_PMQ41_STR-LOPVA sy-vline 
WA_PMQ41_STR-LOPSB sy-vline 
WA_PMQ41_STR-LOPBD sy-vline 
WA_PMQ41_STR-LOPED sy-vline 
WA_PMQ41_STR-PNUM sy-vline 
WA_PMQ41_STR-TOTAL sy-vline 
WA_PMQ41_STR-HEAD1 sy-vline 
WA_PMQ41_STR-LOP1O sy-vline 
WA_PMQ41_STR-LOP1X sy-vline 
WA_PMQ41_STR-LOP1B sy-vline 
WA_PMQ41_STR-LOP1E sy-vline 
WA_PMQ41_STR-PNUM1 sy-vline 
WA_PMQ41_STR-TOTA1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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