ABAP Select data from SAP table P2050 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2050 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 P2050. 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 P2050 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_P2050 TYPE STANDARD TABLE OF P2050,
      WA_P2050 TYPE P2050,
      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: <P2050> TYPE P2050.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2050.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2050
  INTO TABLE IT_P2050.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2050
*  INTO TABLE @DATA(IT_P20502).
*--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_P2050 INDEX 1 INTO DATA(WA_P20502).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2050 ASSIGNING <P2050>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2050>-PERNR = 1.
<P2050>-INFTY = 1.
<P2050>-SUBTY = 1.
<P2050>-OBJPS = 1.
<P2050>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P2050 INTO WA_P2050.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2050-ENDDA, sy-vline,
  WA_P2050-BEGDA, sy-vline,
  WA_P2050-SEQNR, sy-vline,
  WA_P2050-AEDTM, sy-vline,
  WA_P2050-UNAME, sy-vline,
  WA_P2050-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2050 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_P2050 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_P2050 INTO WA_P2050.


*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_P2050_STR, 
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
HISTO TYPE STRING,
ITXEX TYPE STRING,
REFEX TYPE STRING,
ORDEX TYPE STRING,
ITBLD TYPE STRING,
PREAS TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
RESE1 TYPE STRING,
RESE2 TYPE STRING,
GRPVL TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,
VTKEN TYPE STRING,
MONAT TYPE STRING,
TAG01 TYPE STRING,
TAG02 TYPE STRING,
TAG03 TYPE STRING,
TAG04 TYPE STRING,
TAG05 TYPE STRING,
TAG06 TYPE STRING,
TAG07 TYPE STRING,
TAG08 TYPE STRING,
TAG09 TYPE STRING,
TAG10 TYPE STRING,
TAG11 TYPE STRING,
TAG12 TYPE STRING,
TAG13 TYPE STRING,
TAG14 TYPE STRING,
TAG15 TYPE STRING,
TAG16 TYPE STRING,
TAG17 TYPE STRING,
TAG18 TYPE STRING,
TAG19 TYPE STRING,
TAG20 TYPE STRING,
TAG21 TYPE STRING,
TAG22 TYPE STRING,
TAG23 TYPE STRING,
TAG24 TYPE STRING,
TAG25 TYPE STRING,
TAG26 TYPE STRING,
TAG27 TYPE STRING,
TAG28 TYPE STRING,
TAG29 TYPE STRING,
TAG30 TYPE STRING,
TAG31 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2050_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_P2050_STR-PERNR sy-vline 
WA_P2050_STR-INFTY sy-vline 
WA_P2050_STR-SUBTY sy-vline 
WA_P2050_STR-OBJPS sy-vline 
WA_P2050_STR-SPRPS sy-vline 
WA_P2050_STR-ENDDA sy-vline 
WA_P2050_STR-BEGDA sy-vline 
WA_P2050_STR-SEQNR sy-vline 
WA_P2050_STR-AEDTM sy-vline 
WA_P2050_STR-UNAME sy-vline 
WA_P2050_STR-HISTO sy-vline 
WA_P2050_STR-ITXEX sy-vline 
WA_P2050_STR-REFEX sy-vline 
WA_P2050_STR-ORDEX sy-vline 
WA_P2050_STR-ITBLD sy-vline 
WA_P2050_STR-PREAS sy-vline 
WA_P2050_STR-FLAG1 sy-vline 
WA_P2050_STR-FLAG2 sy-vline 
WA_P2050_STR-FLAG3 sy-vline 
WA_P2050_STR-FLAG4 sy-vline 
WA_P2050_STR-RESE1 sy-vline 
WA_P2050_STR-RESE2 sy-vline 
WA_P2050_STR-GRPVL sy-vline 
WA_P2050_STR-BEGUZ sy-vline 
WA_P2050_STR-ENDUZ sy-vline 
WA_P2050_STR-VTKEN sy-vline 
WA_P2050_STR-MONAT sy-vline 
WA_P2050_STR-TAG01 sy-vline 
WA_P2050_STR-TAG02 sy-vline 
WA_P2050_STR-TAG03 sy-vline 
WA_P2050_STR-TAG04 sy-vline 
WA_P2050_STR-TAG05 sy-vline 
WA_P2050_STR-TAG06 sy-vline 
WA_P2050_STR-TAG07 sy-vline 
WA_P2050_STR-TAG08 sy-vline 
WA_P2050_STR-TAG09 sy-vline 
WA_P2050_STR-TAG10 sy-vline 
WA_P2050_STR-TAG11 sy-vline 
WA_P2050_STR-TAG12 sy-vline 
WA_P2050_STR-TAG13 sy-vline 
WA_P2050_STR-TAG14 sy-vline 
WA_P2050_STR-TAG15 sy-vline 
WA_P2050_STR-TAG16 sy-vline 
WA_P2050_STR-TAG17 sy-vline 
WA_P2050_STR-TAG18 sy-vline 
WA_P2050_STR-TAG19 sy-vline 
WA_P2050_STR-TAG20 sy-vline 
WA_P2050_STR-TAG21 sy-vline 
WA_P2050_STR-TAG22 sy-vline 
WA_P2050_STR-TAG23 sy-vline 
WA_P2050_STR-TAG24 sy-vline 
WA_P2050_STR-TAG25 sy-vline 
WA_P2050_STR-TAG26 sy-vline 
WA_P2050_STR-TAG27 sy-vline 
WA_P2050_STR-TAG28 sy-vline 
WA_P2050_STR-TAG29 sy-vline 
WA_P2050_STR-TAG30 sy-vline 
WA_P2050_STR-TAG31 sy-vline      INTO ld_text SEPARATED BY SPACE.

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