ABAP Select data from SAP table RKEC1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKEC1 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 RKEC1. 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 RKEC1 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_RKEC1 TYPE STANDARD TABLE OF RKEC1,
      WA_RKEC1 TYPE RKEC1,
      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: <RKEC1> TYPE RKEC1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RKEC1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RKEC1
  INTO TABLE IT_RKEC1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKEC1
*  INTO TABLE @DATA(IT_RKEC12).
*--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_RKEC1 INDEX 1 INTO DATA(WA_RKEC12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RKEC1 ASSIGNING <RKEC1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKEC1>-BATCH = 1.
<RKEC1>-PRCTR = 1.
<RKEC1>-DATAB = 1.
<RKEC1>-DATBI = 1.
<RKEC1>-RPRCTR = 1.

ENDLOOP.

LOOP AT IT_RKEC1 INTO WA_RKEC1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKEC1-HBDAT, sy-vline,
  WA_RKEC1-HADAT, sy-vline,
  WA_RKEC1-TXFLG, sy-vline,
  WA_RKEC1-SPRAS, sy-vline,
  WA_RKEC1-HITXT, sy-vline,
  WA_RKEC1-DPCFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKEC1 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_RKEC1 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_RKEC1 INTO WA_RKEC1.


*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 PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKEC1-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKEC1-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RPRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKEC1-RPRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKEC1-RPRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RKEC1-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKEC1-SPRAS.
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_RKEC1_STR, 
BATCH TYPE STRING,
PRCTR TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
RPRCTR TYPE STRING,
HBDAT TYPE STRING,
HADAT TYPE STRING,
TXFLG TYPE STRING,
SPRAS TYPE STRING,
HITXT TYPE STRING,
DPCFLG TYPE STRING,
TEST TYPE STRING,
PROT TYPE STRING,
EPOS TYPE STRING,
ERROR TYPE STRING,
KOSTL TYPE STRING,
AUFT TYPE STRING,
INST TYPE STRING,
PROJ TYPE STRING,
EOBJN TYPE STRING,
SOP TYPE STRING,
MRP TYPE STRING,
NETZPL TYPE STRING,
PROZ TYPE STRING,
IMMO TYPE STRING,
KSTRG TYPE STRING,
STORNO TYPE STRING,
ANKREUZFEL TYPE STRING,
COSELACT TYPE STRING,
PRUEF TYPE STRING,
PLAN TYPE STRING,
VOR_PER TYPE STRING,
AKT_PER TYPE STRING,
BUKRS_UEB TYPE STRING,
ANFBE TYPE STRING,
IST TYPE STRING,
PROT_SUC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKEC1_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_RKEC1_STR-BATCH sy-vline 
WA_RKEC1_STR-PRCTR sy-vline 
WA_RKEC1_STR-DATAB sy-vline 
WA_RKEC1_STR-DATBI sy-vline 
WA_RKEC1_STR-RPRCTR sy-vline 
WA_RKEC1_STR-HBDAT sy-vline 
WA_RKEC1_STR-HADAT sy-vline 
WA_RKEC1_STR-TXFLG sy-vline 
WA_RKEC1_STR-SPRAS sy-vline 
WA_RKEC1_STR-HITXT sy-vline 
WA_RKEC1_STR-DPCFLG sy-vline 
WA_RKEC1_STR-TEST sy-vline 
WA_RKEC1_STR-PROT sy-vline 
WA_RKEC1_STR-EPOS sy-vline 
WA_RKEC1_STR-ERROR sy-vline 
WA_RKEC1_STR-KOSTL sy-vline 
WA_RKEC1_STR-AUFT sy-vline 
WA_RKEC1_STR-INST sy-vline 
WA_RKEC1_STR-PROJ sy-vline 
WA_RKEC1_STR-EOBJN sy-vline 
WA_RKEC1_STR-SOP sy-vline 
WA_RKEC1_STR-MRP sy-vline 
WA_RKEC1_STR-NETZPL sy-vline 
WA_RKEC1_STR-PROZ sy-vline 
WA_RKEC1_STR-IMMO sy-vline 
WA_RKEC1_STR-KSTRG sy-vline 
WA_RKEC1_STR-STORNO sy-vline 
WA_RKEC1_STR-ANKREUZFEL sy-vline 
WA_RKEC1_STR-COSELACT sy-vline 
WA_RKEC1_STR-PRUEF sy-vline 
WA_RKEC1_STR-PLAN sy-vline 
WA_RKEC1_STR-VOR_PER sy-vline 
WA_RKEC1_STR-AKT_PER sy-vline 
WA_RKEC1_STR-BUKRS_UEB sy-vline 
WA_RKEC1_STR-ANFBE sy-vline 
WA_RKEC1_STR-IST sy-vline 
WA_RKEC1_STR-PROT_SUC sy-vline      INTO ld_text SEPARATED BY SPACE.

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