ABAP Select data from SAP table P21_0164MOD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P21_0164MOD 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 P21_0164MOD. 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 P21_0164MOD 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_P21_0164MOD TYPE STANDARD TABLE OF P21_0164MOD,
      WA_P21_0164MOD TYPE P21_0164MOD,
      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: <P21_0164MOD> TYPE P21_0164MOD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P21_0164MOD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P21_0164MOD
  INTO TABLE IT_P21_0164MOD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P21_0164MOD
*  INTO TABLE @DATA(IT_P21_0164MOD2).
*--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_P21_0164MOD INDEX 1 INTO DATA(WA_P21_0164MOD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P21_0164MOD ASSIGNING <P21_0164MOD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P21_0164MOD>-PERNR = 1.
<P21_0164MOD>-BUKRS = 1.
<P21_0164MOD>-WERKS = 1.
<P21_0164MOD>-PERSG = 1.
<P21_0164MOD>-PERSK = 1.

ENDLOOP.

LOOP AT IT_P21_0164MOD INTO WA_P21_0164MOD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P21_0164MOD-VDSK1, sy-vline,
  WA_P21_0164MOD-GSBER, sy-vline,
  WA_P21_0164MOD-BTRTL, sy-vline,
  WA_P21_0164MOD-JUPER, sy-vline,
  WA_P21_0164MOD-ABKRS, sy-vline,
  WA_P21_0164MOD-ANSVH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P21_0164MOD 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_P21_0164MOD 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_P21_0164MOD INTO WA_P21_0164MOD.


*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.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P21_0164MOD-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P21_0164MOD-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P21_0164MOD-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P21_0164MOD-GRANT_NBR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SGMNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P21_0164MOD-SGMNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P21_0164MOD-SGMNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field GBDAT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P21_0164MOD-GBDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P21_0164MOD-GBDAT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P21_0164MOD_STR, 
PERNR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
VDSK1 TYPE STRING,
GSBER TYPE STRING,
BTRTL TYPE STRING,
JUPER TYPE STRING,
ABKRS TYPE STRING,
ANSVH TYPE STRING,
KOSTL TYPE STRING,
ORGEH TYPE STRING,
PLANS TYPE STRING,
STELL TYPE STRING,
MSTBR TYPE STRING,
SACHA TYPE STRING,
SACHP TYPE STRING,
SACHZ TYPE STRING,
SNAME TYPE STRING,
ENAME TYPE STRING,
OTYPE TYPE STRING,
SBMOD TYPE STRING,
KOKRS TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
FKBER TYPE STRING,
GRANT_NBR TYPE STRING,
SGMNT TYPE STRING,
BUDGET_PD TYPE STRING,
BUKRS_TX TYPE STRING,
WERKS_TX TYPE STRING,
BTRTL_TX TYPE STRING,
PERSG_TX TYPE STRING,
PERSK_TX TYPE STRING,
KOSTL_TX TYPE STRING,
ABKRS_TX TYPE STRING,
ANSVH_TX TYPE STRING,
GSBER_TX TYPE STRING,
ORGEH_TX TYPE STRING,
PLANS_TX TYPE STRING,
STELL_TX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
GBDAT 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,
UZENET TYPE STRING,
NYUGD_UZENET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P21_0164MOD_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_P21_0164MOD_STR-PERNR sy-vline 
WA_P21_0164MOD_STR-BUKRS sy-vline 
WA_P21_0164MOD_STR-WERKS sy-vline 
WA_P21_0164MOD_STR-PERSG sy-vline 
WA_P21_0164MOD_STR-PERSK sy-vline 
WA_P21_0164MOD_STR-VDSK1 sy-vline 
WA_P21_0164MOD_STR-GSBER sy-vline 
WA_P21_0164MOD_STR-BTRTL sy-vline 
WA_P21_0164MOD_STR-JUPER sy-vline 
WA_P21_0164MOD_STR-ABKRS sy-vline 
WA_P21_0164MOD_STR-ANSVH sy-vline 
WA_P21_0164MOD_STR-KOSTL sy-vline 
WA_P21_0164MOD_STR-ORGEH sy-vline 
WA_P21_0164MOD_STR-PLANS sy-vline 
WA_P21_0164MOD_STR-STELL sy-vline 
WA_P21_0164MOD_STR-MSTBR sy-vline 
WA_P21_0164MOD_STR-SACHA sy-vline 
WA_P21_0164MOD_STR-SACHP sy-vline 
WA_P21_0164MOD_STR-SACHZ sy-vline 
WA_P21_0164MOD_STR-SNAME sy-vline 
WA_P21_0164MOD_STR-ENAME sy-vline 
WA_P21_0164MOD_STR-OTYPE sy-vline 
WA_P21_0164MOD_STR-SBMOD sy-vline 
WA_P21_0164MOD_STR-KOKRS sy-vline 
WA_P21_0164MOD_STR-FISTL sy-vline 
WA_P21_0164MOD_STR-GEBER sy-vline 
WA_P21_0164MOD_STR-FKBER sy-vline 
WA_P21_0164MOD_STR-GRANT_NBR sy-vline 
WA_P21_0164MOD_STR-SGMNT sy-vline 
WA_P21_0164MOD_STR-BUDGET_PD sy-vline 
WA_P21_0164MOD_STR-BUKRS_TX sy-vline 
WA_P21_0164MOD_STR-WERKS_TX sy-vline 
WA_P21_0164MOD_STR-BTRTL_TX sy-vline 
WA_P21_0164MOD_STR-PERSG_TX sy-vline 
WA_P21_0164MOD_STR-PERSK_TX sy-vline 
WA_P21_0164MOD_STR-KOSTL_TX sy-vline 
WA_P21_0164MOD_STR-ABKRS_TX sy-vline 
WA_P21_0164MOD_STR-ANSVH_TX sy-vline 
WA_P21_0164MOD_STR-GSBER_TX sy-vline 
WA_P21_0164MOD_STR-ORGEH_TX sy-vline 
WA_P21_0164MOD_STR-PLANS_TX sy-vline 
WA_P21_0164MOD_STR-STELL_TX sy-vline 
WA_P21_0164MOD_STR-BEGDA sy-vline 
WA_P21_0164MOD_STR-ENDDA sy-vline 
WA_P21_0164MOD_STR-GBDAT sy-vline 
WA_P21_0164MOD_STR-SVNUM sy-vline 
WA_P21_0164MOD_STR-SVKNU sy-vline 
WA_P21_0164MOD_STR-AGREN sy-vline 
WA_P21_0164MOD_STR-AGKRA sy-vline 
WA_P21_0164MOD_STR-AGARB sy-vline 
WA_P21_0164MOD_STR-AGAZU sy-vline 
WA_P21_0164MOD_STR-ANREN sy-vline 
WA_P21_0164MOD_STR-ANKRA sy-vline 
WA_P21_0164MOD_STR-ANARB sy-vline 
WA_P21_0164MOD_STR-TBKIF sy-vline 
WA_P21_0164MOD_STR-NJMAX sy-vline 
WA_P21_0164MOD_STR-EUHOZ sy-vline 
WA_P21_0164MOD_STR-ALKMN sy-vline 
WA_P21_0164MOD_STR-MANYP sy-vline 
WA_P21_0164MOD_STR-VALKI sy-vline 
WA_P21_0164MOD_STR-DOLKI sy-vline 
WA_P21_0164MOD_STR-JCKOD sy-vline 
WA_P21_0164MOD_STR-EUPRZ sy-vline 
WA_P21_0164MOD_STR-MEGJS sy-vline 
WA_P21_0164MOD_STR-SKTIP sy-vline 
WA_P21_0164MOD_STR-MVEHO sy-vline 
WA_P21_0164MOD_STR-MEKHO sy-vline 
WA_P21_0164MOD_STR-TAKER sy-vline 
WA_P21_0164MOD_STR-NYNLE sy-vline 
WA_P21_0164MOD_STR-EUNLE sy-vline 
WA_P21_0164MOD_STR-EUN13 sy-vline 
WA_P21_0164MOD_STR-ANKRB sy-vline 
WA_P21_0164MOD_STR-PENLE sy-vline 
WA_P21_0164MOD_STR-TENLE sy-vline 
WA_P21_0164MOD_STR-NYUTI sy-vline 
WA_P21_0164MOD_STR-RATJO sy-vline 
WA_P21_0164MOD_STR-NYUTO sy-vline 
WA_P21_0164MOD_STR-NORMJ sy-vline 
WA_P21_0164MOD_STR-KKEDV sy-vline 
WA_P21_0164MOD_STR-FOGLJ sy-vline 
WA_P21_0164MOD_STR-KOFOG sy-vline 
WA_P21_0164MOD_STR-RMIKF sy-vline 
WA_P21_0164MOD_STR-HEKHO sy-vline 
WA_P21_0164MOD_STR-SZKEP sy-vline 
WA_P21_0164MOD_STR-KAHID sy-vline 
WA_P21_0164MOD_STR-MBERM sy-vline 
WA_P21_0164MOD_STR-NYUT2 sy-vline 
WA_P21_0164MOD_STR-REHAB sy-vline 
WA_P21_0164MOD_STR-KFKMP sy-vline 
WA_P21_0164MOD_STR-GYEDS sy-vline 
WA_P21_0164MOD_STR-K5525 sy-vline 
WA_P21_0164MOD_STR-K25FE sy-vline 
WA_P21_0164MOD_STR-SZVAL sy-vline 
WA_P21_0164MOD_STR-KUTAT sy-vline 
WA_P21_0164MOD_STR-MTABI sy-vline 
WA_P21_0164MOD_STR-KFOKS sy-vline 
WA_P21_0164MOD_STR-M2555 sy-vline 
WA_P21_0164MOD_STR-UZENET sy-vline 
WA_P21_0164MOD_STR-NYUGD_UZENET sy-vline      INTO ld_text SEPARATED BY SPACE.

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