ABAP Select data from SAP table PA0818 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PA0818 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 PA0818. 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 PA0818 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_PA0818 TYPE STANDARD TABLE OF PA0818,
      WA_PA0818 TYPE PA0818,
      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: <PA0818> TYPE PA0818.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PA0818.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PA0818
  INTO TABLE IT_PA0818.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PA0818
*  INTO TABLE @DATA(IT_PA08182).
*--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_PA0818 INDEX 1 INTO DATA(WA_PA08182).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PA0818 ASSIGNING <PA0818>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PA0818>-MANDT = 1.
<PA0818>-PERNR = 1.
<PA0818>-SUBTY = 1.
<PA0818>-OBJPS = 1.
<PA0818>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_PA0818 INTO WA_PA0818.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PA0818-ENDDA, sy-vline,
  WA_PA0818-BEGDA, sy-vline,
  WA_PA0818-SEQNR, sy-vline,
  WA_PA0818-AEDTM, sy-vline,
  WA_PA0818-UNAME, sy-vline,
  WA_PA0818-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PA0818 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_PA0818 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_PA0818 INTO WA_PA0818.


*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_PA0818_STR, 
MANDT TYPE STRING,
PERNR 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,
NPCAT TYPE STRING,
NPSTU TYPE STRING,
NPCLS TYPE STRING,
ACCNM TYPE STRING,
EERAT TYPE STRING,
ERRAT TYPE STRING,
PSBEG TYPE STRING,
PSEND TYPE STRING,
CLDAT TYPE STRING,
CLAMT TYPE STRING,
CLCUR TYPE STRING,
IDCLS TYPE STRING,
EREXP TYPE STRING,
NPSCR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PA0818_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_PA0818_STR-MANDT sy-vline 
WA_PA0818_STR-PERNR sy-vline 
WA_PA0818_STR-SUBTY sy-vline 
WA_PA0818_STR-OBJPS sy-vline 
WA_PA0818_STR-SPRPS sy-vline 
WA_PA0818_STR-ENDDA sy-vline 
WA_PA0818_STR-BEGDA sy-vline 
WA_PA0818_STR-SEQNR sy-vline 
WA_PA0818_STR-AEDTM sy-vline 
WA_PA0818_STR-UNAME sy-vline 
WA_PA0818_STR-HISTO sy-vline 
WA_PA0818_STR-ITXEX sy-vline 
WA_PA0818_STR-REFEX sy-vline 
WA_PA0818_STR-ORDEX sy-vline 
WA_PA0818_STR-ITBLD sy-vline 
WA_PA0818_STR-PREAS sy-vline 
WA_PA0818_STR-FLAG1 sy-vline 
WA_PA0818_STR-FLAG2 sy-vline 
WA_PA0818_STR-FLAG3 sy-vline 
WA_PA0818_STR-FLAG4 sy-vline 
WA_PA0818_STR-RESE1 sy-vline 
WA_PA0818_STR-RESE2 sy-vline 
WA_PA0818_STR-GRPVL sy-vline 
WA_PA0818_STR-NPCAT sy-vline 
WA_PA0818_STR-NPSTU sy-vline 
WA_PA0818_STR-NPCLS sy-vline 
WA_PA0818_STR-ACCNM sy-vline 
WA_PA0818_STR-EERAT sy-vline 
WA_PA0818_STR-ERRAT sy-vline 
WA_PA0818_STR-PSBEG sy-vline 
WA_PA0818_STR-PSEND sy-vline 
WA_PA0818_STR-CLDAT sy-vline 
WA_PA0818_STR-CLAMT sy-vline 
WA_PA0818_STR-CLCUR sy-vline 
WA_PA0818_STR-IDCLS sy-vline 
WA_PA0818_STR-EREXP sy-vline 
WA_PA0818_STR-NPSCR sy-vline      INTO ld_text SEPARATED BY SPACE.

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