ABAP Select data from SAP table P0894 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0894 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 P0894. 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 P0894 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_P0894 TYPE STANDARD TABLE OF P0894,
      WA_P0894 TYPE P0894,
      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: <P0894> TYPE P0894.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0894.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0894
  INTO TABLE IT_P0894.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0894
*  INTO TABLE @DATA(IT_P08942).
*--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_P0894 INDEX 1 INTO DATA(WA_P08942).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0894 ASSIGNING <P0894>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0894>-PERNR = 1.
<P0894>-INFTY = 1.
<P0894>-SUBTY = 1.
<P0894>-OBJPS = 1.
<P0894>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0894 INTO WA_P0894.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0894-ENDDA, sy-vline,
  WA_P0894-BEGDA, sy-vline,
  WA_P0894-SEQNR, sy-vline,
  WA_P0894-AEDTM, sy-vline,
  WA_P0894-UNAME, sy-vline,
  WA_P0894-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0894 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_P0894 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_P0894 INTO WA_P0894.


*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_P0894_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,
TXCMP TYPE STRING,
TAURT TYPE STRING,
FITEX TYPE STRING,
FSTEX TYPE STRING,
FMTEX TYPE STRING,
FUTEX TYPE STRING,
FITRT TYPE STRING,
FITAM TYPE STRING,
FNMEX TYPE STRING,
WKSTA TYPE STRING,
SWKPC TYPE STRING,
TMPWS TYPE STRING,
RSSTA TYPE STRING,
UISTA TYPE STRING,
WKSIT TYPE STRING,
SITEX TYPE STRING,
SUTEX TYPE STRING,
SDTEX TYPE STRING,
SWTEX TYPE STRING,
SITRT TYPE STRING,
SITAM TYPE STRING,
SNMEX TYPE STRING,
WKLOC TYPE STRING,
RSLOC TYPE STRING,
LWKPC TYPE STRING,
TMPWL TYPE STRING,
TYP01 TYPE STRING,
EXP01 TYPE STRING,
TYP02 TYPE STRING,
EXP02 TYPE STRING,
TYP03 TYPE STRING,
EXP03 TYPE STRING,
TYP04 TYPE STRING,
EXP04 TYPE STRING,
TYP05 TYPE STRING,
EXP05 TYPE STRING,
TYP06 TYPE STRING,
EXP06 TYPE STRING,
TYP07 TYPE STRING,
EXP07 TYPE STRING,
TYP08 TYPE STRING,
EXP08 TYPE STRING,
TYP09 TYPE STRING,
EXP09 TYPE STRING,
TYP10 TYPE STRING,
EXP10 TYPE STRING,
TYP11 TYPE STRING,
EXP11 TYPE STRING,
TYP12 TYPE STRING,
EXP12 TYPE STRING,
TYP13 TYPE STRING,
EXP13 TYPE STRING,
TYP14 TYPE STRING,
EXP14 TYPE STRING,
TYP15 TYPE STRING,
EXP15 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0894_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_P0894_STR-PERNR sy-vline 
WA_P0894_STR-INFTY sy-vline 
WA_P0894_STR-SUBTY sy-vline 
WA_P0894_STR-OBJPS sy-vline 
WA_P0894_STR-SPRPS sy-vline 
WA_P0894_STR-ENDDA sy-vline 
WA_P0894_STR-BEGDA sy-vline 
WA_P0894_STR-SEQNR sy-vline 
WA_P0894_STR-AEDTM sy-vline 
WA_P0894_STR-UNAME sy-vline 
WA_P0894_STR-HISTO sy-vline 
WA_P0894_STR-ITXEX sy-vline 
WA_P0894_STR-REFEX sy-vline 
WA_P0894_STR-ORDEX sy-vline 
WA_P0894_STR-ITBLD sy-vline 
WA_P0894_STR-PREAS sy-vline 
WA_P0894_STR-FLAG1 sy-vline 
WA_P0894_STR-FLAG2 sy-vline 
WA_P0894_STR-FLAG3 sy-vline 
WA_P0894_STR-FLAG4 sy-vline 
WA_P0894_STR-RESE1 sy-vline 
WA_P0894_STR-RESE2 sy-vline 
WA_P0894_STR-GRPVL sy-vline 
WA_P0894_STR-TXCMP sy-vline 
WA_P0894_STR-TAURT sy-vline 
WA_P0894_STR-FITEX sy-vline 
WA_P0894_STR-FSTEX sy-vline 
WA_P0894_STR-FMTEX sy-vline 
WA_P0894_STR-FUTEX sy-vline 
WA_P0894_STR-FITRT sy-vline 
WA_P0894_STR-FITAM sy-vline 
WA_P0894_STR-FNMEX sy-vline 
WA_P0894_STR-WKSTA sy-vline 
WA_P0894_STR-SWKPC sy-vline 
WA_P0894_STR-TMPWS sy-vline 
WA_P0894_STR-RSSTA sy-vline 
WA_P0894_STR-UISTA sy-vline 
WA_P0894_STR-WKSIT sy-vline 
WA_P0894_STR-SITEX sy-vline 
WA_P0894_STR-SUTEX sy-vline 
WA_P0894_STR-SDTEX sy-vline 
WA_P0894_STR-SWTEX sy-vline 
WA_P0894_STR-SITRT sy-vline 
WA_P0894_STR-SITAM sy-vline 
WA_P0894_STR-SNMEX sy-vline 
WA_P0894_STR-WKLOC sy-vline 
WA_P0894_STR-RSLOC sy-vline 
WA_P0894_STR-LWKPC sy-vline 
WA_P0894_STR-TMPWL sy-vline 
WA_P0894_STR-TYP01 sy-vline 
WA_P0894_STR-EXP01 sy-vline 
WA_P0894_STR-TYP02 sy-vline 
WA_P0894_STR-EXP02 sy-vline 
WA_P0894_STR-TYP03 sy-vline 
WA_P0894_STR-EXP03 sy-vline 
WA_P0894_STR-TYP04 sy-vline 
WA_P0894_STR-EXP04 sy-vline 
WA_P0894_STR-TYP05 sy-vline 
WA_P0894_STR-EXP05 sy-vline 
WA_P0894_STR-TYP06 sy-vline 
WA_P0894_STR-EXP06 sy-vline 
WA_P0894_STR-TYP07 sy-vline 
WA_P0894_STR-EXP07 sy-vline 
WA_P0894_STR-TYP08 sy-vline 
WA_P0894_STR-EXP08 sy-vline 
WA_P0894_STR-TYP09 sy-vline 
WA_P0894_STR-EXP09 sy-vline 
WA_P0894_STR-TYP10 sy-vline 
WA_P0894_STR-EXP10 sy-vline 
WA_P0894_STR-TYP11 sy-vline 
WA_P0894_STR-EXP11 sy-vline 
WA_P0894_STR-TYP12 sy-vline 
WA_P0894_STR-EXP12 sy-vline 
WA_P0894_STR-TYP13 sy-vline 
WA_P0894_STR-EXP13 sy-vline 
WA_P0894_STR-TYP14 sy-vline 
WA_P0894_STR-EXP14 sy-vline 
WA_P0894_STR-TYP15 sy-vline 
WA_P0894_STR-EXP15 sy-vline      INTO ld_text SEPARATED BY SPACE.

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