ABAP Select data from SAP table IPPMGAMT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IPPMGAMT
*  INTO TABLE @DATA(IT_IPPMGAMT2).
*--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_IPPMGAMT INDEX 1 INTO DATA(WA_IPPMGAMT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IPPMGAMT>-MANDT = 1.
<IPPMGAMT>-PREPAYMENTAGREEMENT = 1.
<IPPMGAMT>-PREPAYMENTAGREEMENTTYPE = 1.
<IPPMGAMT>-PREPAYMENTAGREEMENTCATEGORY = 1.
<IPPMGAMT>-COMPANYCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IPPMGAMT-COUNTERPARTY, sy-vline,
  WA_IPPMGAMT-PREPAYMENTAGREEMENTSTATUS, sy-vline,
  WA_IPPMGAMT-PREPAYMENTAGRMTLINKSTATUS, sy-vline,
  WA_IPPMGAMT-PREPAYMENTAGRMTPOSTINGSTATUS, sy-vline,
  WA_IPPMGAMT-PREPAYMENTAGREEMENTAMOUNT, sy-vline,
  WA_IPPMGAMT-PREPAYMENTAGREEMENTCURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IPPMGAMT 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_IPPMGAMT 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_IPPMGAMT INTO WA_IPPMGAMT.


*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 COUNTERPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IPPMGAMT-COUNTERPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPPMGAMT-COUNTERPARTY.
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_IPPMGAMT_STR, 
MANDT TYPE STRING,
PREPAYMENTAGREEMENT TYPE STRING,
PREPAYMENTAGREEMENTTYPE TYPE STRING,
PREPAYMENTAGREEMENTCATEGORY TYPE STRING,
COMPANYCODE TYPE STRING,
COUNTERPARTY TYPE STRING,
PREPAYMENTAGREEMENTSTATUS TYPE STRING,
PREPAYMENTAGRMTLINKSTATUS TYPE STRING,
PREPAYMENTAGRMTPOSTINGSTATUS TYPE STRING,
PREPAYMENTAGREEMENTAMOUNT TYPE STRING,
PREPAYMENTAGREEMENTCURRENCY TYPE STRING,
PREPAYMENTAGRMTLINKTYPE TYPE STRING,
PREPAYMENTAGRMTCONSUMEDAMOUNT TYPE STRING,
PREPAYMENTDISTRCURRENCY TYPE STRING,
PREPAYMENTAGRMTSETTLEDAMOUNT TYPE STRING,
PREPAYACCRUALPOSTEDCURRENCY TYPE STRING,
PREPAYMENTAGRMTEVENTAMOUNT TYPE STRING,
PREPAYMENTCREDITCURRENCY TYPE STRING,
PREPAYMENTINTERESTCALCAMOUNT TYPE STRING,
PREPAYMENTINTERESTCALCAMTCRCY TYPE STRING,
PREPAYMENTUNASSIGNEDAMT TYPE STRING,
PREPAYMENTAGRMTOPENAMOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IPPMGAMT_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_IPPMGAMT_STR-MANDT sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGREEMENT sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGREEMENTTYPE sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGREEMENTCATEGORY sy-vline 
WA_IPPMGAMT_STR-COMPANYCODE sy-vline 
WA_IPPMGAMT_STR-COUNTERPARTY sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGREEMENTSTATUS sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGRMTLINKSTATUS sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGRMTPOSTINGSTATUS sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGREEMENTAMOUNT sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGREEMENTCURRENCY sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGRMTLINKTYPE sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGRMTCONSUMEDAMOUNT sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTDISTRCURRENCY sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGRMTSETTLEDAMOUNT sy-vline 
WA_IPPMGAMT_STR-PREPAYACCRUALPOSTEDCURRENCY sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGRMTEVENTAMOUNT sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTCREDITCURRENCY sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTINTERESTCALCAMOUNT sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTINTERESTCALCAMTCRCY sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTUNASSIGNEDAMT sy-vline 
WA_IPPMGAMT_STR-PREPAYMENTAGRMTOPENAMOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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