ABAP Select data from SAP table AVISCACCRUAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVISCACCRUAL
*  INTO TABLE @DATA(IT_AVISCACCRUAL2).
*--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_AVISCACCRUAL INDEX 1 INTO DATA(WA_AVISCACCRUAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVISCACCRUAL>-MANDT = 1.
<AVISCACCRUAL>-ACCRUALGUID = 1.
<AVISCACCRUAL>-SETTL_GUID = 1.
<AVISCACCRUAL>-SCKEYGRP = 1.
<AVISCACCRUAL>-OBJNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVISCACCRUAL-PFROM, sy-vline,
  WA_AVISCACCRUAL-PTO, sy-vline,
  WA_AVISCACCRUAL-PROCESSGUID, sy-vline,
  WA_AVISCACCRUAL-CURRKEY, sy-vline,
  WA_AVISCACCRUAL-ACCRUALAMOUNT, sy-vline,
  WA_AVISCACCRUAL-CSTEXTAPP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVISCACCRUAL 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_AVISCACCRUAL 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_AVISCACCRUAL INTO WA_AVISCACCRUAL.


*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 SCKEYGRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AVISCACCRUAL-SCKEYGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVISCACCRUAL-SCKEYGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field PTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_AVISCACCRUAL-PTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVISCACCRUAL-PTO.
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_AVISCACCRUAL_STR, 
MANDT TYPE STRING,
ACCRUALGUID TYPE STRING,
SETTL_GUID TYPE STRING,
SCKEYGRP TYPE STRING,
OBJNR TYPE STRING,
PFROM TYPE STRING,
PTO TYPE STRING,
PROCESSGUID TYPE STRING,
CURRKEY TYPE STRING,
ACCRUALAMOUNT TYPE STRING,
CSTEXTAPP TYPE STRING,
CSTINTAPP TYPE STRING,
CSTNONAPPPART TYPE STRING,
CSTNONAPPVAC TYPE STRING,
CSTNONAPPFLAT TYPE STRING,
PRPAYREV TYPE STRING,
PRPAYCUST TYPE STRING,
PRPAYINT TYPE STRING,
PRPAYRO TYPE STRING,
PRPAYFLAT TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVISCACCRUAL_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_AVISCACCRUAL_STR-MANDT sy-vline 
WA_AVISCACCRUAL_STR-ACCRUALGUID sy-vline 
WA_AVISCACCRUAL_STR-SETTL_GUID sy-vline 
WA_AVISCACCRUAL_STR-SCKEYGRP sy-vline 
WA_AVISCACCRUAL_STR-OBJNR sy-vline 
WA_AVISCACCRUAL_STR-PFROM sy-vline 
WA_AVISCACCRUAL_STR-PTO sy-vline 
WA_AVISCACCRUAL_STR-PROCESSGUID sy-vline 
WA_AVISCACCRUAL_STR-CURRKEY sy-vline 
WA_AVISCACCRUAL_STR-ACCRUALAMOUNT sy-vline 
WA_AVISCACCRUAL_STR-CSTEXTAPP sy-vline 
WA_AVISCACCRUAL_STR-CSTINTAPP sy-vline 
WA_AVISCACCRUAL_STR-CSTNONAPPPART sy-vline 
WA_AVISCACCRUAL_STR-CSTNONAPPVAC sy-vline 
WA_AVISCACCRUAL_STR-CSTNONAPPFLAT sy-vline 
WA_AVISCACCRUAL_STR-PRPAYREV sy-vline 
WA_AVISCACCRUAL_STR-PRPAYCUST sy-vline 
WA_AVISCACCRUAL_STR-PRPAYINT sy-vline 
WA_AVISCACCRUAL_STR-PRPAYRO sy-vline 
WA_AVISCACCRUAL_STR-PRPAYFLAT sy-vline 
WA_AVISCACCRUAL_STR-RERF sy-vline 
WA_AVISCACCRUAL_STR-DERF sy-vline 
WA_AVISCACCRUAL_STR-TERF sy-vline 
WA_AVISCACCRUAL_STR-REHER sy-vline 
WA_AVISCACCRUAL_STR-RBEAR sy-vline 
WA_AVISCACCRUAL_STR-DBEAR sy-vline 
WA_AVISCACCRUAL_STR-TBEAR sy-vline 
WA_AVISCACCRUAL_STR-RBHER sy-vline 
WA_AVISCACCRUAL_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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