ABAP Select data from SAP table AVCT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVCT
*  INTO TABLE @DATA(IT_AVCT2).
*--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_AVCT INDEX 1 INTO DATA(WA_AVCT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVCT>-RFIKRS = 1.
<AVCT>-RFUND = 1.
<AVCT>-RFUNDSCTR = 1.
<AVCT>-RCMMTITEM = 1.
<AVCT>-RFUNCAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVCT-RGRANT_NBR, sy-vline,
  WA_AVCT-RMEASURE, sy-vline,
  WA_AVCT-RUSERDIM, sy-vline,
  WA_AVCT-RLDNR, sy-vline,
  WA_AVCT-RRCTY, sy-vline,
  WA_AVCT-RVERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVCT 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_AVCT 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_AVCT INTO WA_AVCT.


*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 FMCIL, internal->external for field RCMMTITEM
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_AVCT-RCMMTITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVCT-RCMMTITEM.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_AVCT-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVCT-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIO7
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_AVCT-PERIO7
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVCT-PERIO7.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CEFFYEAR_9
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_AVCT-CEFFYEAR_9
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVCT-CEFFYEAR_9.
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_AVCT_STR, 
RFIKRS TYPE STRING,
RFUND TYPE STRING,
RFUNDSCTR TYPE STRING,
RCMMTITEM TYPE STRING,
RFUNCAREA TYPE STRING,
RGRANT_NBR TYPE STRING,
RMEASURE TYPE STRING,
RUSERDIM TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
RYEAR TYPE STRING,
PERIO TYPE STRING,
PERIO7 TYPE STRING,
DRCRK TYPE STRING,
RCVRGRP_9 TYPE STRING,
CEFFYEAR_9 TYPE STRING,
WFSTATE_9 TYPE STRING,
ALLOCTYPE_9 TYPE STRING,
TWAER TYPE STRING,
TAMOUNT TYPE STRING,
FWAER TYPE STRING,
HAMOUNT TYPE STRING,
KWAER TYPE STRING,
KAMOUNT TYPE STRING,
BUDGET_PD_9 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVCT_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_AVCT_STR-RFIKRS sy-vline 
WA_AVCT_STR-RFUND sy-vline 
WA_AVCT_STR-RFUNDSCTR sy-vline 
WA_AVCT_STR-RCMMTITEM sy-vline 
WA_AVCT_STR-RFUNCAREA sy-vline 
WA_AVCT_STR-RGRANT_NBR sy-vline 
WA_AVCT_STR-RMEASURE sy-vline 
WA_AVCT_STR-RUSERDIM sy-vline 
WA_AVCT_STR-RLDNR sy-vline 
WA_AVCT_STR-RRCTY sy-vline 
WA_AVCT_STR-RVERS sy-vline 
WA_AVCT_STR-RYEAR sy-vline 
WA_AVCT_STR-PERIO sy-vline 
WA_AVCT_STR-PERIO7 sy-vline 
WA_AVCT_STR-DRCRK sy-vline 
WA_AVCT_STR-RCVRGRP_9 sy-vline 
WA_AVCT_STR-CEFFYEAR_9 sy-vline 
WA_AVCT_STR-WFSTATE_9 sy-vline 
WA_AVCT_STR-ALLOCTYPE_9 sy-vline 
WA_AVCT_STR-TWAER sy-vline 
WA_AVCT_STR-TAMOUNT sy-vline 
WA_AVCT_STR-FWAER sy-vline 
WA_AVCT_STR-HAMOUNT sy-vline 
WA_AVCT_STR-KWAER sy-vline 
WA_AVCT_STR-KAMOUNT sy-vline 
WA_AVCT_STR-BUDGET_PD_9 sy-vline      INTO ld_text SEPARATED BY SPACE.

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