ABAP Select data from SAP table P0164 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0164 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 P0164. 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 P0164 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_P0164 TYPE STANDARD TABLE OF P0164,
      WA_P0164 TYPE P0164,
      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: <P0164> TYPE P0164.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0164.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0164
  INTO TABLE IT_P0164.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0164
*  INTO TABLE @DATA(IT_P01642).
*--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_P0164 INDEX 1 INTO DATA(WA_P01642).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0164 ASSIGNING <P0164>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0164>-PERNR = 1.
<P0164>-INFTY = 1.
<P0164>-SUBTY = 1.
<P0164>-OBJPS = 1.
<P0164>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0164 INTO WA_P0164.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0164-ENDDA, sy-vline,
  WA_P0164-BEGDA, sy-vline,
  WA_P0164-SEQNR, sy-vline,
  WA_P0164-AEDTM, sy-vline,
  WA_P0164-UNAME, sy-vline,
  WA_P0164-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0164 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_P0164 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_P0164 INTO WA_P0164.


*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_P0164_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,
SVNUM TYPE STRING,
SVKNU TYPE STRING,
AGREN TYPE STRING,
AGKRA TYPE STRING,
AGARB TYPE STRING,
AGAZU TYPE STRING,
ANREN TYPE STRING,
ANKRA TYPE STRING,
ANARB TYPE STRING,
TBKIF TYPE STRING,
NJMAX TYPE STRING,
EUHOZ TYPE STRING,
ALKMN TYPE STRING,
MANYP TYPE STRING,
VALKI TYPE STRING,
DOLKI TYPE STRING,
JCKOD TYPE STRING,
EUPRZ TYPE STRING,
MEGJS TYPE STRING,
SKTIP TYPE STRING,
MVEHO TYPE STRING,
MEKHO TYPE STRING,
TAKER TYPE STRING,
NYNLE TYPE STRING,
EUNLE TYPE STRING,
EUN13 TYPE STRING,
ANKRB TYPE STRING,
PENLE TYPE STRING,
TENLE TYPE STRING,
NYUTI TYPE STRING,
RATJO TYPE STRING,
NYUTO TYPE STRING,
NORMJ TYPE STRING,
KKEDV TYPE STRING,
FOGLJ TYPE STRING,
KOFOG TYPE STRING,
RMIKF TYPE STRING,
HEKHO TYPE STRING,
SZKEP TYPE STRING,
KAHID TYPE STRING,
MBERM TYPE STRING,
NYUT2 TYPE STRING,
REHAB TYPE STRING,
KFKMP TYPE STRING,
GYEDS TYPE STRING,
K5525 TYPE STRING,
K25FE TYPE STRING,
SZVAL TYPE STRING,
KUTAT TYPE STRING,
MTABI TYPE STRING,
KFOKS TYPE STRING,
M2555 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0164_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_P0164_STR-PERNR sy-vline 
WA_P0164_STR-INFTY sy-vline 
WA_P0164_STR-SUBTY sy-vline 
WA_P0164_STR-OBJPS sy-vline 
WA_P0164_STR-SPRPS sy-vline 
WA_P0164_STR-ENDDA sy-vline 
WA_P0164_STR-BEGDA sy-vline 
WA_P0164_STR-SEQNR sy-vline 
WA_P0164_STR-AEDTM sy-vline 
WA_P0164_STR-UNAME sy-vline 
WA_P0164_STR-HISTO sy-vline 
WA_P0164_STR-ITXEX sy-vline 
WA_P0164_STR-REFEX sy-vline 
WA_P0164_STR-ORDEX sy-vline 
WA_P0164_STR-ITBLD sy-vline 
WA_P0164_STR-PREAS sy-vline 
WA_P0164_STR-FLAG1 sy-vline 
WA_P0164_STR-FLAG2 sy-vline 
WA_P0164_STR-FLAG3 sy-vline 
WA_P0164_STR-FLAG4 sy-vline 
WA_P0164_STR-RESE1 sy-vline 
WA_P0164_STR-RESE2 sy-vline 
WA_P0164_STR-GRPVL sy-vline 
WA_P0164_STR-SVNUM sy-vline 
WA_P0164_STR-SVKNU sy-vline 
WA_P0164_STR-AGREN sy-vline 
WA_P0164_STR-AGKRA sy-vline 
WA_P0164_STR-AGARB sy-vline 
WA_P0164_STR-AGAZU sy-vline 
WA_P0164_STR-ANREN sy-vline 
WA_P0164_STR-ANKRA sy-vline 
WA_P0164_STR-ANARB sy-vline 
WA_P0164_STR-TBKIF sy-vline 
WA_P0164_STR-NJMAX sy-vline 
WA_P0164_STR-EUHOZ sy-vline 
WA_P0164_STR-ALKMN sy-vline 
WA_P0164_STR-MANYP sy-vline 
WA_P0164_STR-VALKI sy-vline 
WA_P0164_STR-DOLKI sy-vline 
WA_P0164_STR-JCKOD sy-vline 
WA_P0164_STR-EUPRZ sy-vline 
WA_P0164_STR-MEGJS sy-vline 
WA_P0164_STR-SKTIP sy-vline 
WA_P0164_STR-MVEHO sy-vline 
WA_P0164_STR-MEKHO sy-vline 
WA_P0164_STR-TAKER sy-vline 
WA_P0164_STR-NYNLE sy-vline 
WA_P0164_STR-EUNLE sy-vline 
WA_P0164_STR-EUN13 sy-vline 
WA_P0164_STR-ANKRB sy-vline 
WA_P0164_STR-PENLE sy-vline 
WA_P0164_STR-TENLE sy-vline 
WA_P0164_STR-NYUTI sy-vline 
WA_P0164_STR-RATJO sy-vline 
WA_P0164_STR-NYUTO sy-vline 
WA_P0164_STR-NORMJ sy-vline 
WA_P0164_STR-KKEDV sy-vline 
WA_P0164_STR-FOGLJ sy-vline 
WA_P0164_STR-KOFOG sy-vline 
WA_P0164_STR-RMIKF sy-vline 
WA_P0164_STR-HEKHO sy-vline 
WA_P0164_STR-SZKEP sy-vline 
WA_P0164_STR-KAHID sy-vline 
WA_P0164_STR-MBERM sy-vline 
WA_P0164_STR-NYUT2 sy-vline 
WA_P0164_STR-REHAB sy-vline 
WA_P0164_STR-KFKMP sy-vline 
WA_P0164_STR-GYEDS sy-vline 
WA_P0164_STR-K5525 sy-vline 
WA_P0164_STR-K25FE sy-vline 
WA_P0164_STR-SZVAL sy-vline 
WA_P0164_STR-KUTAT sy-vline 
WA_P0164_STR-MTABI sy-vline 
WA_P0164_STR-KFOKS sy-vline 
WA_P0164_STR-M2555 sy-vline      INTO ld_text SEPARATED BY SPACE.

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