ABAP Select data from SAP table P0799 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0799 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 P0799. 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 P0799 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_P0799 TYPE STANDARD TABLE OF P0799,
      WA_P0799 TYPE P0799,
      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: <P0799> TYPE P0799.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0799.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0799
  INTO TABLE IT_P0799.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0799
*  INTO TABLE @DATA(IT_P07992).
*--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_P0799 INDEX 1 INTO DATA(WA_P07992).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0799 ASSIGNING <P0799>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0799>-PERNR = 1.
<P0799>-INFTY = 1.
<P0799>-SUBTY = 1.
<P0799>-OBJPS = 1.
<P0799>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0799 INTO WA_P0799.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0799-ENDDA, sy-vline,
  WA_P0799-BEGDA, sy-vline,
  WA_P0799-SEQNR, sy-vline,
  WA_P0799-AEDTM, sy-vline,
  WA_P0799-UNAME, sy-vline,
  WA_P0799-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0799 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_P0799 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_P0799 INTO WA_P0799.


*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_P0799_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,
ACCAF TYPE STRING,
MOTAF TYPE STRING,
STAFI TYPE STRING,
FPAFI TYPE STRING,
FEINI TYPE STRING,
INDSU TYPE STRING,
RELAB TYPE STRING,
NUSST TYPE STRING,
CAUSU TYPE STRING,
RELEV TYPE STRING,
CODES TYPE STRING,
MUJSR TYPE STRING,
COLTR TYPE STRING,
INACT TYPE STRING,
COEF_HUEL TYPE STRING,
MREIN TYPE STRING,
INCRE TYPE STRING,
PTRAU TYPE STRING,
EXCVD TYPE STRING,
RACIN TYPE STRING,
ALUMB TYPE STRING,
REDJB TYPE STRING,
AUTTR TYPE STRING,
AUTVI TYPE STRING,
HPAFI TYPE STRING,
CODER TYPE STRING,
TXTAD TYPE STRING,
TXTOT TYPE STRING,
GLBID TYPE STRING,
DTRTP TYPE STRING,
CPTRA TYPE STRING,
PERDB TYPE STRING,
INDAU TYPE STRING,
INDPB TYPE STRING,
SAAFI TYPE STRING,
NEWBE TYPE STRING,
NEWEN TYPE STRING,
VIFAM TYPE STRING,
INDIMP TYPE STRING,
JORN_REDUC TYPE STRING,
YOUTH_GUARANTEE TYPE STRING,
INACTIVITY_2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0799_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_P0799_STR-PERNR sy-vline 
WA_P0799_STR-INFTY sy-vline 
WA_P0799_STR-SUBTY sy-vline 
WA_P0799_STR-OBJPS sy-vline 
WA_P0799_STR-SPRPS sy-vline 
WA_P0799_STR-ENDDA sy-vline 
WA_P0799_STR-BEGDA sy-vline 
WA_P0799_STR-SEQNR sy-vline 
WA_P0799_STR-AEDTM sy-vline 
WA_P0799_STR-UNAME sy-vline 
WA_P0799_STR-HISTO sy-vline 
WA_P0799_STR-ITXEX sy-vline 
WA_P0799_STR-REFEX sy-vline 
WA_P0799_STR-ORDEX sy-vline 
WA_P0799_STR-ITBLD sy-vline 
WA_P0799_STR-PREAS sy-vline 
WA_P0799_STR-FLAG1 sy-vline 
WA_P0799_STR-FLAG2 sy-vline 
WA_P0799_STR-FLAG3 sy-vline 
WA_P0799_STR-FLAG4 sy-vline 
WA_P0799_STR-RESE1 sy-vline 
WA_P0799_STR-RESE2 sy-vline 
WA_P0799_STR-GRPVL sy-vline 
WA_P0799_STR-ACCAF sy-vline 
WA_P0799_STR-MOTAF sy-vline 
WA_P0799_STR-STAFI sy-vline 
WA_P0799_STR-FPAFI sy-vline 
WA_P0799_STR-FEINI sy-vline 
WA_P0799_STR-INDSU sy-vline 
WA_P0799_STR-RELAB sy-vline 
WA_P0799_STR-NUSST sy-vline 
WA_P0799_STR-CAUSU sy-vline 
WA_P0799_STR-RELEV sy-vline 
WA_P0799_STR-CODES sy-vline 
WA_P0799_STR-MUJSR sy-vline 
WA_P0799_STR-COLTR sy-vline 
WA_P0799_STR-INACT sy-vline 
WA_P0799_STR-COEF_HUEL sy-vline 
WA_P0799_STR-MREIN sy-vline 
WA_P0799_STR-INCRE sy-vline 
WA_P0799_STR-PTRAU sy-vline 
WA_P0799_STR-EXCVD sy-vline 
WA_P0799_STR-RACIN sy-vline 
WA_P0799_STR-ALUMB sy-vline 
WA_P0799_STR-REDJB sy-vline 
WA_P0799_STR-AUTTR sy-vline 
WA_P0799_STR-AUTVI sy-vline 
WA_P0799_STR-HPAFI sy-vline 
WA_P0799_STR-CODER sy-vline 
WA_P0799_STR-TXTAD sy-vline 
WA_P0799_STR-TXTOT sy-vline 
WA_P0799_STR-GLBID sy-vline 
WA_P0799_STR-DTRTP sy-vline 
WA_P0799_STR-CPTRA sy-vline 
WA_P0799_STR-PERDB sy-vline 
WA_P0799_STR-INDAU sy-vline 
WA_P0799_STR-INDPB sy-vline 
WA_P0799_STR-SAAFI sy-vline 
WA_P0799_STR-NEWBE sy-vline 
WA_P0799_STR-NEWEN sy-vline 
WA_P0799_STR-VIFAM sy-vline 
WA_P0799_STR-INDIMP sy-vline 
WA_P0799_STR-JORN_REDUC sy-vline 
WA_P0799_STR-YOUTH_GUARANTEE sy-vline 
WA_P0799_STR-INACTIVITY_2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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