ABAP Select data from SAP table IA1KBLK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IA1KBLK 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 IA1KBLK. 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 IA1KBLK 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_IA1KBLK TYPE STANDARD TABLE OF IA1KBLK,
      WA_IA1KBLK TYPE IA1KBLK,
      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: <IA1KBLK> TYPE IA1KBLK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IA1KBLK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IA1KBLK
  INTO TABLE IT_IA1KBLK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IA1KBLK
*  INTO TABLE @DATA(IT_IA1KBLK2).
*--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_IA1KBLK INDEX 1 INTO DATA(WA_IA1KBLK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IA1KBLK ASSIGNING <IA1KBLK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IA1KBLK>-BLKKZ = 1.
<IA1KBLK>-FEXEC = 1.
<IA1KBLK>-WKAPK = 1.
<IA1KBLK>-WKAOK = 1.
<IA1KBLK>-ADDITIV_CONS_LOG = 1.

ENDLOOP.

LOOP AT IT_IA1KBLK INTO WA_IA1KBLK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IA1KBLK-FMREASON, sy-vline,
  WA_IA1KBLK-WF_START, sy-vline,
  WA_IA1KBLK-ORGVG, sy-vline,
  WA_IA1KBLK-KURSUK, sy-vline,
  WA_IA1KBLK-DATUK, sy-vline,
  WA_IA1KBLK-NPRBUDGET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IA1KBLK 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_IA1KBLK 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_IA1KBLK INTO WA_IA1KBLK.


*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 EXCRT, internal->external for field KURSUK
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_IA1KBLK-KURSUK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IA1KBLK-KURSUK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IA1KBLK-RFBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IA1KBLK-RFBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IA1KBLK-RFSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IA1KBLK-RFSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PFM_CONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_IA1KBLK-PFM_CONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IA1KBLK-PFM_CONTRACT.
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_IA1KBLK_STR, 
BLKKZ TYPE STRING,
FEXEC TYPE STRING,
WKAPK TYPE STRING,
WKAOK TYPE STRING,
ADDITIV_CONS_LOG TYPE STRING,
FMREASON TYPE STRING,
WF_START TYPE STRING,
ORGVG TYPE STRING,
KURSUK TYPE STRING,
DATUK TYPE STRING,
NPRBUDGET TYPE STRING,
PAYBUDGET TYPE STRING,
COMBUDGET TYPE STRING,
DOCLOCK TYPE STRING,
PMDOCS TYPE STRING,
RFBLNR TYPE STRING,
RFORG TYPE STRING,
RFTYP TYPE STRING,
RFSYS TYPE STRING,
MVSTAT TYPE STRING,
INV_CONS TYPE STRING,
XDATE TYPE STRING,
FMRO_TEMPLATE TYPE STRING,
REFT TYPE STRING,
MODA TYPE STRING,
PFM_FOA TYPE STRING,
PFM_SPEC TYPE STRING,
PFM_CONTRACT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IA1KBLK_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_IA1KBLK_STR-BLKKZ sy-vline 
WA_IA1KBLK_STR-FEXEC sy-vline 
WA_IA1KBLK_STR-WKAPK sy-vline 
WA_IA1KBLK_STR-WKAOK sy-vline 
WA_IA1KBLK_STR-ADDITIV_CONS_LOG sy-vline 
WA_IA1KBLK_STR-FMREASON sy-vline 
WA_IA1KBLK_STR-WF_START sy-vline 
WA_IA1KBLK_STR-ORGVG sy-vline 
WA_IA1KBLK_STR-KURSUK sy-vline 
WA_IA1KBLK_STR-DATUK sy-vline 
WA_IA1KBLK_STR-NPRBUDGET sy-vline 
WA_IA1KBLK_STR-PAYBUDGET sy-vline 
WA_IA1KBLK_STR-COMBUDGET sy-vline 
WA_IA1KBLK_STR-DOCLOCK sy-vline 
WA_IA1KBLK_STR-PMDOCS sy-vline 
WA_IA1KBLK_STR-RFBLNR sy-vline 
WA_IA1KBLK_STR-RFORG sy-vline 
WA_IA1KBLK_STR-RFTYP sy-vline 
WA_IA1KBLK_STR-RFSYS sy-vline 
WA_IA1KBLK_STR-MVSTAT sy-vline 
WA_IA1KBLK_STR-INV_CONS sy-vline 
WA_IA1KBLK_STR-XDATE sy-vline 
WA_IA1KBLK_STR-FMRO_TEMPLATE sy-vline 
WA_IA1KBLK_STR-REFT sy-vline 
WA_IA1KBLK_STR-MODA sy-vline 
WA_IA1KBLK_STR-PFM_FOA sy-vline 
WA_IA1KBLK_STR-PFM_SPEC sy-vline 
WA_IA1KBLK_STR-PFM_CONTRACT sy-vline      INTO ld_text SEPARATED BY SPACE.

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