ABAP Select data from SAP table P1656 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P1656 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 P1656. 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 P1656 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_P1656 TYPE STANDARD TABLE OF P1656,
      WA_P1656 TYPE P1656,
      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: <P1656> TYPE P1656.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P1656.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P1656
  INTO TABLE IT_P1656.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P1656
*  INTO TABLE @DATA(IT_P16562).
*--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_P1656 INDEX 1 INTO DATA(WA_P16562).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P1656 ASSIGNING <P1656>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P1656>-MANDT = 1.
<P1656>-PLVAR = 1.
<P1656>-OTYPE = 1.
<P1656>-OBJID = 1.
<P1656>-INFTY = 1.

ENDLOOP.

LOOP AT IT_P1656 INTO WA_P1656.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P1656-SUBTY, sy-vline,
  WA_P1656-ISTAT, sy-vline,
  WA_P1656-PRIOX, sy-vline,
  WA_P1656-BEGDA, sy-vline,
  WA_P1656-ENDDA, sy-vline,
  WA_P1656-VARYF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P1656 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_P1656 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_P1656 INTO WA_P1656.


*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_P1656_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
PRIOX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
VARYF TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
REASN TYPE STRING,
HISTO TYPE STRING,
ITXNR TYPE STRING,
GPVAL TYPE STRING,
HEADU TYPE STRING,
DETAU TYPE STRING,
FLTAX TYPE STRING,
FLPFR TYPE STRING,
FLSIN TYPE STRING,
FLCST TYPE STRING,
UPVAL TYPE STRING,
SNAME TYPE STRING,
TELNR TYPE STRING,
FAXNR TYPE STRING,
EMAIL TYPE STRING,
IPN TYPE STRING,
EDRPOU TYPE STRING,
KOATUU TYPE STRING,
KVED TYPE STRING,
ZKGNG TYPE STRING,
SPODU TYPE STRING,
KFV TYPE STRING,
KOPFG TYPE STRING,
BUDO TYPE STRING,
KPZED TYPE STRING,
DKPP TYPE STRING,
EXEAUTH TYPE STRING,
TAXSYS TYPE STRING,
BANKN TYPE STRING,
RAHUN TYPE STRING,
MFO TYPE STRING,
PRRISK TYPE STRING,
ORGINV TYPE STRING,
UTOGS TYPE STRING,
CONT01 TYPE STRING,
PERN01 TYPE STRING,
CONT02 TYPE STRING,
PERN02 TYPE STRING,
CONT03 TYPE STRING,
PERN03 TYPE STRING,
CONT04 TYPE STRING,
PERN04 TYPE STRING,
FLHUTAX TYPE STRING,
FLHUPFR TYPE STRING,
FLHUSIN TYPE STRING,
FLHUCST TYPE STRING,
HUTAX TYPE STRING,
HUPFR TYPE STRING,
HUSIN TYPE STRING,
HUCST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P1656_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_P1656_STR-MANDT sy-vline 
WA_P1656_STR-PLVAR sy-vline 
WA_P1656_STR-OTYPE sy-vline 
WA_P1656_STR-OBJID sy-vline 
WA_P1656_STR-INFTY sy-vline 
WA_P1656_STR-SUBTY sy-vline 
WA_P1656_STR-ISTAT sy-vline 
WA_P1656_STR-PRIOX sy-vline 
WA_P1656_STR-BEGDA sy-vline 
WA_P1656_STR-ENDDA sy-vline 
WA_P1656_STR-VARYF sy-vline 
WA_P1656_STR-SEQNR sy-vline 
WA_P1656_STR-AEDTM sy-vline 
WA_P1656_STR-UNAME sy-vline 
WA_P1656_STR-REASN sy-vline 
WA_P1656_STR-HISTO sy-vline 
WA_P1656_STR-ITXNR sy-vline 
WA_P1656_STR-GPVAL sy-vline 
WA_P1656_STR-HEADU sy-vline 
WA_P1656_STR-DETAU sy-vline 
WA_P1656_STR-FLTAX sy-vline 
WA_P1656_STR-FLPFR sy-vline 
WA_P1656_STR-FLSIN sy-vline 
WA_P1656_STR-FLCST sy-vline 
WA_P1656_STR-UPVAL sy-vline 
WA_P1656_STR-SNAME sy-vline 
WA_P1656_STR-TELNR sy-vline 
WA_P1656_STR-FAXNR sy-vline 
WA_P1656_STR-EMAIL sy-vline 
WA_P1656_STR-IPN sy-vline 
WA_P1656_STR-EDRPOU sy-vline 
WA_P1656_STR-KOATUU sy-vline 
WA_P1656_STR-KVED sy-vline 
WA_P1656_STR-ZKGNG sy-vline 
WA_P1656_STR-SPODU sy-vline 
WA_P1656_STR-KFV sy-vline 
WA_P1656_STR-KOPFG sy-vline 
WA_P1656_STR-BUDO sy-vline 
WA_P1656_STR-KPZED sy-vline 
WA_P1656_STR-DKPP sy-vline 
WA_P1656_STR-EXEAUTH sy-vline 
WA_P1656_STR-TAXSYS sy-vline 
WA_P1656_STR-BANKN sy-vline 
WA_P1656_STR-RAHUN sy-vline 
WA_P1656_STR-MFO sy-vline 
WA_P1656_STR-PRRISK sy-vline 
WA_P1656_STR-ORGINV sy-vline 
WA_P1656_STR-UTOGS sy-vline 
WA_P1656_STR-CONT01 sy-vline 
WA_P1656_STR-PERN01 sy-vline 
WA_P1656_STR-CONT02 sy-vline 
WA_P1656_STR-PERN02 sy-vline 
WA_P1656_STR-CONT03 sy-vline 
WA_P1656_STR-PERN03 sy-vline 
WA_P1656_STR-CONT04 sy-vline 
WA_P1656_STR-PERN04 sy-vline 
WA_P1656_STR-FLHUTAX sy-vline 
WA_P1656_STR-FLHUPFR sy-vline 
WA_P1656_STR-FLHUSIN sy-vline 
WA_P1656_STR-FLHUCST sy-vline 
WA_P1656_STR-HUTAX sy-vline 
WA_P1656_STR-HUPFR sy-vline 
WA_P1656_STR-HUSIN sy-vline 
WA_P1656_STR-HUCST sy-vline      INTO ld_text SEPARATED BY SPACE.

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