ABAP Select data from SAP table PMEIS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMEIS
*  INTO TABLE @DATA(IT_PMEIS2).
*--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_PMEIS INDEX 1 INTO DATA(WA_PMEIS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMEIS>-BUKRS = 1.
<PMEIS>-WERKS = 1.
<PMEIS>-BTRTL = 1.
<PMEIS>-PERSG = 1.
<PMEIS>-PERSK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMEIS-ABKRS, sy-vline,
  WA_PMEIS-TRFAR, sy-vline,
  WA_PMEIS-TRFGB, sy-vline,
  WA_PMEIS-TRFGR, sy-vline,
  WA_PMEIS-TRFST, sy-vline,
  WA_PMEIS-CTTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMEIS 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_PMEIS 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_PMEIS INTO WA_PMEIS.


*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_PMEIS_STR, 
BUKRS TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
ABKRS TYPE STRING,
TRFAR TYPE STRING,
TRFGB TYPE STRING,
TRFGR TYPE STRING,
TRFST TYPE STRING,
CTTYP TYPE STRING,
MASSN TYPE STRING,
MASSG TYPE STRING,
BSGRD TYPE STRING,
STAT1 TYPE STRING,
STAT2 TYPE STRING,
STAT3 TYPE STRING,
UNITO TYPE STRING,
UNITP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMEIS_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_PMEIS_STR-BUKRS sy-vline 
WA_PMEIS_STR-WERKS sy-vline 
WA_PMEIS_STR-BTRTL sy-vline 
WA_PMEIS_STR-PERSG sy-vline 
WA_PMEIS_STR-PERSK sy-vline 
WA_PMEIS_STR-ABKRS sy-vline 
WA_PMEIS_STR-TRFAR sy-vline 
WA_PMEIS_STR-TRFGB sy-vline 
WA_PMEIS_STR-TRFGR sy-vline 
WA_PMEIS_STR-TRFST sy-vline 
WA_PMEIS_STR-CTTYP sy-vline 
WA_PMEIS_STR-MASSN sy-vline 
WA_PMEIS_STR-MASSG sy-vline 
WA_PMEIS_STR-BSGRD sy-vline 
WA_PMEIS_STR-STAT1 sy-vline 
WA_PMEIS_STR-STAT2 sy-vline 
WA_PMEIS_STR-STAT3 sy-vline 
WA_PMEIS_STR-UNITO sy-vline 
WA_PMEIS_STR-UNITP sy-vline      INTO ld_text SEPARATED BY SPACE.

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